./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/xor5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/xor5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa --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 a4ee2cdc1f0cbbd62309a70b71e98ce771ffa71f4ebd85e731799a93fbbc3919 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:28:24,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:28:24,193 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:28:24,224 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:28:24,225 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:28:24,226 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:28:24,228 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:28:24,230 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:28:24,232 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:28:24,233 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:28:24,234 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:28:24,235 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:28:24,236 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:28:24,237 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:28:24,239 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:28:24,240 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:28:24,241 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:28:24,242 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:28:24,244 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:28:24,246 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:28:24,248 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:28:24,250 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:28:24,251 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:28:24,252 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:28:24,255 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:28:24,256 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:28:24,256 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:28:24,257 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:28:24,258 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:28:24,259 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:28:24,259 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:28:24,260 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:28:24,261 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:28:24,262 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:28:24,263 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:28:24,263 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:28:24,263 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:28:24,264 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:28:24,264 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:28:24,265 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:28:24,265 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:28:24,266 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 18:28:24,289 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:28:24,290 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:28:24,290 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:28:24,290 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:28:24,291 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:28:24,291 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:28:24,292 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:28:24,292 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:28:24,292 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:28:24,292 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:28:24,292 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:28:24,292 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:28:24,293 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:28:24,293 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:28:24,293 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 18:28:24,293 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:28:24,293 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 18:28:24,294 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:28:24,294 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 18:28:24,294 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:28:24,294 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 18:28:24,294 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:28:24,294 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:28:24,295 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:28:24,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:28:24,295 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:28:24,295 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:28:24,295 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 18:28:24,296 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:28:24,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:28:24,296 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 18:28:24,296 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 18:28:24,296 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 18:28:24,296 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:28:24,297 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_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4ee2cdc1f0cbbd62309a70b71e98ce771ffa71f4ebd85e731799a93fbbc3919 [2021-12-06 18:28:24,488 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:28:24,507 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:28:24,509 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:28:24,509 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:28:24,510 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:28:24,511 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-crafted/xor5.i [2021-12-06 18:28:24,561 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/data/fc9d42e56/c3cd62189b8c4c2ea903c4ce54bc7e4a/FLAG3a45c5ef2 [2021-12-06 18:28:24,962 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:28:24,962 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/sv-benchmarks/c/array-crafted/xor5.i [2021-12-06 18:28:24,967 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/data/fc9d42e56/c3cd62189b8c4c2ea903c4ce54bc7e4a/FLAG3a45c5ef2 [2021-12-06 18:28:24,977 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/data/fc9d42e56/c3cd62189b8c4c2ea903c4ce54bc7e4a [2021-12-06 18:28:24,979 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:28:24,980 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:28:24,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:28:24,981 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:28:24,984 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:28:24,984 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:28:24" (1/1) ... [2021-12-06 18:28:24,985 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2663517d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:24, skipping insertion in model container [2021-12-06 18:28:24,985 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:28:24" (1/1) ... [2021-12-06 18:28:24,990 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:28:25,002 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:28:25,147 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_b32ebe9b-483a-462e-9a20-bc711b762812/sv-benchmarks/c/array-crafted/xor5.i[1364,1377] [2021-12-06 18:28:25,149 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:28:25,155 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:28:25,172 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_b32ebe9b-483a-462e-9a20-bc711b762812/sv-benchmarks/c/array-crafted/xor5.i[1364,1377] [2021-12-06 18:28:25,172 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:28:25,183 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:28:25,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:25 WrapperNode [2021-12-06 18:28:25,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:28:25,184 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:28:25,184 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:28:25,184 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:28:25,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:25" (1/1) ... [2021-12-06 18:28:25,195 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:25" (1/1) ... [2021-12-06 18:28:25,211 INFO L137 Inliner]: procedures = 16, calls = 29, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2021-12-06 18:28:25,211 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:28:25,212 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:28:25,212 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:28:25,212 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:28:25,219 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:25" (1/1) ... [2021-12-06 18:28:25,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:25" (1/1) ... [2021-12-06 18:28:25,221 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:25" (1/1) ... [2021-12-06 18:28:25,221 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:25" (1/1) ... [2021-12-06 18:28:25,226 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:25" (1/1) ... [2021-12-06 18:28:25,229 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:25" (1/1) ... [2021-12-06 18:28:25,230 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:25" (1/1) ... [2021-12-06 18:28:25,232 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:28:25,232 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:28:25,232 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:28:25,232 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:28:25,233 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:25" (1/1) ... [2021-12-06 18:28:25,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:28:25,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:25,256 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:28:25,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:28:25,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:28:25,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 18:28:25,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 18:28:25,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 18:28:25,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:28:25,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:28:25,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 18:28:25,287 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2021-12-06 18:28:25,287 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2021-12-06 18:28:25,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 18:28:25,335 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:28:25,336 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:28:25,443 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:28:25,449 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:28:25,449 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-06 18:28:25,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:28:25 BoogieIcfgContainer [2021-12-06 18:28:25,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:28:25,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:28:25,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:28:25,456 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:28:25,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:28:24" (1/3) ... [2021-12-06 18:28:25,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a0975f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:28:25, skipping insertion in model container [2021-12-06 18:28:25,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:25" (2/3) ... [2021-12-06 18:28:25,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a0975f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:28:25, skipping insertion in model container [2021-12-06 18:28:25,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:28:25" (3/3) ... [2021-12-06 18:28:25,459 INFO L111 eAbstractionObserver]: Analyzing ICFG xor5.i [2021-12-06 18:28:25,464 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:28:25,464 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 18:28:25,509 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:28:25,516 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 [2021-12-06 18:28:25,516 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 18:28:25,533 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:28:25,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 18:28:25,538 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:25,539 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:25,539 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:25,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:25,545 INFO L85 PathProgramCache]: Analyzing trace with hash 2030793856, now seen corresponding path program 1 times [2021-12-06 18:28:25,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:25,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694430969] [2021-12-06 18:28:25,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:25,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:25,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:25,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 18:28:25,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:25,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:28:25,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:25,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 18:28:25,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:25,713 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 18:28:25,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:25,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694430969] [2021-12-06 18:28:25,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694430969] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:28:25,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:28:25,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:28:25,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387358896] [2021-12-06 18:28:25,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:28:25,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 18:28:25,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:25,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 18:28:25,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 18:28:25,745 INFO L87 Difference]: Start difference. First operand has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 18:28:25,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:25,761 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2021-12-06 18:28:25,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 18:28:25,763 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2021-12-06 18:28:25,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:25,770 INFO L225 Difference]: With dead ends: 51 [2021-12-06 18:28:25,770 INFO L226 Difference]: Without dead ends: 23 [2021-12-06 18:28:25,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 18:28:25,777 INFO L933 BasicCegarLoop]: 33 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, 33 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 [2021-12-06 18:28:25,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:28:25,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-06 18:28:25,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-06 18:28:25,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:28:25,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-12-06 18:28:25,820 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 29 [2021-12-06 18:28:25,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:25,821 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-12-06 18:28:25,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 18:28:25,821 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-12-06 18:28:25,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 18:28:25,823 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:25,823 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:25,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 18:28:25,824 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:25,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:25,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1398988038, now seen corresponding path program 1 times [2021-12-06 18:28:25,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:25,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569328396] [2021-12-06 18:28:25,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:25,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:25,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:25,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 18:28:25,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:25,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:28:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:25,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 18:28:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:25,924 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 18:28:25,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:25,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569328396] [2021-12-06 18:28:25,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569328396] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:28:25,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:28:25,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:28:25,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040758764] [2021-12-06 18:28:25,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:28:25,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:28:25,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:25,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:28:25,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:28:25,927 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 18:28:25,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:25,949 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2021-12-06 18:28:25,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:28:25,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2021-12-06 18:28:25,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:25,950 INFO L225 Difference]: With dead ends: 43 [2021-12-06 18:28:25,950 INFO L226 Difference]: Without dead ends: 25 [2021-12-06 18:28:25,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:28:25,951 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:25,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 41 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:28:25,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-06 18:28:25,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-12-06 18:28:25,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:28:25,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-12-06 18:28:25,957 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 29 [2021-12-06 18:28:25,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:25,957 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-12-06 18:28:25,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 18:28:25,957 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-12-06 18:28:25,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 18:28:25,958 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:25,958 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:25,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 18:28:25,958 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:25,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:25,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1708163684, now seen corresponding path program 1 times [2021-12-06 18:28:25,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:25,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631148028] [2021-12-06 18:28:25,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:25,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:25,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:25,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:28:25,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:26,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:28:26,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:26,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 18:28:26,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:26,022 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:28:26,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:26,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631148028] [2021-12-06 18:28:26,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631148028] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:26,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486605953] [2021-12-06 18:28:26,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:26,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:26,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:26,024 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:26,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 18:28:26,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:26,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 18:28:26,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:26,162 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 18:28:26,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:26,222 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 18:28:26,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486605953] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:26,223 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:26,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-12-06 18:28:26,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513664365] [2021-12-06 18:28:26,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:26,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 18:28:26,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:26,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 18:28:26,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:28:26,225 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 18:28:26,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:26,294 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2021-12-06 18:28:26,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 18:28:26,295 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 31 [2021-12-06 18:28:26,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:26,296 INFO L225 Difference]: With dead ends: 47 [2021-12-06 18:28:26,300 INFO L226 Difference]: Without dead ends: 29 [2021-12-06 18:28:26,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:28:26,303 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 25 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:26,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 71 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:28:26,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-06 18:28:26,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-12-06 18:28:26,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:28:26,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-12-06 18:28:26,310 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 31 [2021-12-06 18:28:26,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:26,310 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-12-06 18:28:26,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 18:28:26,310 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-12-06 18:28:26,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-06 18:28:26,312 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:26,312 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:26,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:28:26,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:26,514 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:26,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:26,516 INFO L85 PathProgramCache]: Analyzing trace with hash 533240604, now seen corresponding path program 1 times [2021-12-06 18:28:26,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:26,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126013238] [2021-12-06 18:28:26,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:26,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:26,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:26,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:28:26,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:26,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 18:28:26,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:26,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 18:28:26,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:26,716 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 18:28:26,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:26,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126013238] [2021-12-06 18:28:26,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126013238] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:26,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189329757] [2021-12-06 18:28:26,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:26,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:26,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:26,719 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:26,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 18:28:26,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:26,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:28:26,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:26,836 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 18:28:26,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:28:26,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189329757] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:28:26,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:28:26,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2021-12-06 18:28:26,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8060195] [2021-12-06 18:28:26,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:28:26,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:28:26,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:26,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:28:26,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:28:26,838 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 18:28:26,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:26,863 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-12-06 18:28:26,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:28:26,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2021-12-06 18:28:26,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:26,864 INFO L225 Difference]: With dead ends: 42 [2021-12-06 18:28:26,864 INFO L226 Difference]: Without dead ends: 29 [2021-12-06 18:28:26,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:28:26,865 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:26,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 28 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:28:26,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-06 18:28:26,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-12-06 18:28:26,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:28:26,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-12-06 18:28:26,869 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 39 [2021-12-06 18:28:26,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:26,871 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-12-06 18:28:26,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 18:28:26,871 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-12-06 18:28:26,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 18:28:26,872 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:26,872 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:26,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 18:28:27,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:27,073 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:27,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:27,074 INFO L85 PathProgramCache]: Analyzing trace with hash 850880602, now seen corresponding path program 1 times [2021-12-06 18:28:27,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:27,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638276976] [2021-12-06 18:28:27,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:27,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:27,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 18:28:27,190 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 18:28:27,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 18:28:27,240 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 18:28:27,240 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-06 18:28:27,241 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-06 18:28:27,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 18:28:27,244 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2021-12-06 18:28:27,246 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-06 18:28:27,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.12 06:28:27 BoogieIcfgContainer [2021-12-06 18:28:27,276 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-06 18:28:27,277 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 18:28:27,277 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 18:28:27,277 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 18:28:27,277 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:28:25" (3/4) ... [2021-12-06 18:28:27,279 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-06 18:28:27,280 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 18:28:27,280 INFO L158 Benchmark]: Toolchain (without parser) took 2300.24ms. Allocated memory was 94.4MB in the beginning and 115.3MB in the end (delta: 21.0MB). Free memory was 56.1MB in the beginning and 55.6MB in the end (delta: 448.3kB). Peak memory consumption was 21.9MB. Max. memory is 16.1GB. [2021-12-06 18:28:27,280 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 94.4MB. Free memory was 72.4MB in the beginning and 72.3MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 18:28:27,281 INFO L158 Benchmark]: CACSL2BoogieTranslator took 202.26ms. Allocated memory is still 94.4MB. Free memory was 55.8MB in the beginning and 68.5MB in the end (delta: -12.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-06 18:28:27,281 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.68ms. Allocated memory is still 94.4MB. Free memory was 68.5MB in the beginning and 67.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 18:28:27,281 INFO L158 Benchmark]: Boogie Preprocessor took 19.71ms. Allocated memory is still 94.4MB. Free memory was 66.8MB in the beginning and 65.8MB in the end (delta: 961.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 18:28:27,281 INFO L158 Benchmark]: RCFGBuilder took 218.73ms. Allocated memory is still 94.4MB. Free memory was 65.8MB in the beginning and 54.9MB in the end (delta: 10.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-06 18:28:27,282 INFO L158 Benchmark]: TraceAbstraction took 1823.55ms. Allocated memory was 94.4MB in the beginning and 115.3MB in the end (delta: 21.0MB). Free memory was 54.2MB in the beginning and 56.5MB in the end (delta: -2.3MB). Peak memory consumption was 21.9MB. Max. memory is 16.1GB. [2021-12-06 18:28:27,282 INFO L158 Benchmark]: Witness Printer took 3.03ms. Allocated memory is still 115.3MB. Free memory is still 55.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 18:28:27,283 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 94.4MB. Free memory was 72.4MB in the beginning and 72.3MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 202.26ms. Allocated memory is still 94.4MB. Free memory was 55.8MB in the beginning and 68.5MB in the end (delta: -12.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.68ms. Allocated memory is still 94.4MB. Free memory was 68.5MB in the beginning and 67.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 19.71ms. Allocated memory is still 94.4MB. Free memory was 66.8MB in the beginning and 65.8MB in the end (delta: 961.1kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 218.73ms. Allocated memory is still 94.4MB. Free memory was 65.8MB in the beginning and 54.9MB in the end (delta: 10.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 1823.55ms. Allocated memory was 94.4MB in the beginning and 115.3MB in the end (delta: 21.0MB). Free memory was 54.2MB in the beginning and 56.5MB in the end (delta: -2.3MB). Peak memory consumption was 21.9MB. Max. memory is 16.1GB. * Witness Printer took 3.03ms. Allocated memory is still 115.3MB. Free memory is still 55.6MB. There was no memory consumed. 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 - UnprovableResult [Line: 57]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseXor at line 25. Possible FailurePath: [L17] int N; VAL [N=0] [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; [L35] int temp; [L36] int ret; [L37] int ret2; [L38] int ret5; [L40] int i = 0; VAL [i=0, N=2, x={9:0}] [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ VAL [i=1, N=2, x={9:0}] [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ VAL [i=2, N=2, x={9:0}] [L40] COND FALSE !(i < N) VAL [i=2, N=2, x={9:0}] [L45] CALL, EXPR xor(x) VAL [N=2, x={9:0}] [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 VAL [i=1, N=2, res=-2, x={9:0}, x={9:0}] [L24] COND TRUE i < N [L25] EXPR x[i] [L25] res = res ^ x[i] [L24] i++ VAL [i=2, N=2, x={9:0}, x={9:0}] [L24] COND FALSE !(i < N) VAL [i=2, N=2, x={9:0}, x={9:0}] [L27] return res; VAL [\result=-4, i=2, N=2, res=4294967292, x={9:0}, x={9:0}] [L45] RET, EXPR xor(x) VAL [i=2, N=2, x={9:0}, xor(x)=-4] [L45] ret = xor(x) [L47] EXPR x[0] [L47] temp=x[0] [L47] EXPR x[1] [L47] x[0] = x[1] [L47] x[1] = temp VAL [i=2, N=2, ret=-4, temp=-2, x={9:0}] [L48] CALL, EXPR xor(x) VAL [N=2, x={9:0}] [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 VAL [i=1, N=2, res=-3, x={9:0}, x={9:0}] [L24] COND TRUE i < N [L25] EXPR x[i] [L25] res = res ^ x[i] [L24] i++ VAL [i=2, N=2, x={9:0}, x={9:0}] [L24] COND FALSE !(i < N) VAL [i=2, N=2, x={9:0}, x={9:0}] [L27] return res; VAL [\result=0, i=2, N=2, res=0, x={9:0}, x={9:0}] [L48] RET, EXPR xor(x) VAL [i=2, N=2, ret=-4, temp=-2, x={9:0}, xor(x)=0] [L48] ret2 = xor(x) [L49] EXPR x[0] [L49] temp=x[0] [L50] int i =0 ; VAL [i=0, i=2, N=2, ret=-4, ret2=0, temp=-3, x={9:0}] [L50] COND TRUE i main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa 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 -> a4ee2cdc1f0cbbd62309a70b71e98ce771ffa71f4ebd85e731799a93fbbc3919 [2021-12-06 18:28:29,156 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:28:29,172 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:28:29,174 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:28:29,175 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:28:29,175 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:28:29,176 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-crafted/xor5.i [2021-12-06 18:28:29,216 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/data/145956a08/210bcbd3d3dc474e9e54b175bc9ae8e0/FLAGb238599ab [2021-12-06 18:28:29,587 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:28:29,588 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/sv-benchmarks/c/array-crafted/xor5.i [2021-12-06 18:28:29,593 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/data/145956a08/210bcbd3d3dc474e9e54b175bc9ae8e0/FLAGb238599ab [2021-12-06 18:28:29,604 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/data/145956a08/210bcbd3d3dc474e9e54b175bc9ae8e0 [2021-12-06 18:28:29,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:28:29,607 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:28:29,609 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:28:29,609 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:28:29,611 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:28:29,612 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:28:29" (1/1) ... [2021-12-06 18:28:29,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cc31aa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:29, skipping insertion in model container [2021-12-06 18:28:29,613 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:28:29" (1/1) ... [2021-12-06 18:28:29,618 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:28:29,632 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:28:29,765 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_b32ebe9b-483a-462e-9a20-bc711b762812/sv-benchmarks/c/array-crafted/xor5.i[1364,1377] [2021-12-06 18:28:29,767 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:28:29,775 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:28:29,794 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_b32ebe9b-483a-462e-9a20-bc711b762812/sv-benchmarks/c/array-crafted/xor5.i[1364,1377] [2021-12-06 18:28:29,795 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:28:29,810 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:28:29,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:29 WrapperNode [2021-12-06 18:28:29,811 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:28:29,812 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:28:29,812 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:28:29,812 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:28:29,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:29" (1/1) ... [2021-12-06 18:28:29,825 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:29" (1/1) ... [2021-12-06 18:28:29,844 INFO L137 Inliner]: procedures = 18, calls = 29, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 72 [2021-12-06 18:28:29,844 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:28:29,845 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:28:29,845 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:28:29,845 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:28:29,854 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:29" (1/1) ... [2021-12-06 18:28:29,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:29" (1/1) ... [2021-12-06 18:28:29,857 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:29" (1/1) ... [2021-12-06 18:28:29,858 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:29" (1/1) ... [2021-12-06 18:28:29,865 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:29" (1/1) ... [2021-12-06 18:28:29,869 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:29" (1/1) ... [2021-12-06 18:28:29,871 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:29" (1/1) ... [2021-12-06 18:28:29,874 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:28:29,875 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:28:29,875 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:28:29,875 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:28:29,876 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:29" (1/1) ... [2021-12-06 18:28:29,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:28:29,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:29,904 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:28:29,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:28:29,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:28:29,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-06 18:28:29,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 18:28:29,933 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-06 18:28:29,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:28:29,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:28:29,933 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2021-12-06 18:28:29,933 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2021-12-06 18:28:29,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 18:28:29,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-06 18:28:29,989 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:28:29,991 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:28:30,121 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:28:30,128 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:28:30,128 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-06 18:28:30,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:28:30 BoogieIcfgContainer [2021-12-06 18:28:30,130 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:28:30,131 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:28:30,131 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:28:30,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:28:30,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:28:29" (1/3) ... [2021-12-06 18:28:30,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74923e5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:28:30, skipping insertion in model container [2021-12-06 18:28:30,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:28:29" (2/3) ... [2021-12-06 18:28:30,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74923e5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:28:30, skipping insertion in model container [2021-12-06 18:28:30,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:28:30" (3/3) ... [2021-12-06 18:28:30,137 INFO L111 eAbstractionObserver]: Analyzing ICFG xor5.i [2021-12-06 18:28:30,142 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:28:30,142 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 18:28:30,186 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:28:30,191 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 [2021-12-06 18:28:30,191 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 18:28:30,205 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:28:30,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 18:28:30,209 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:30,209 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:30,215 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:30,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:30,219 INFO L85 PathProgramCache]: Analyzing trace with hash 2030793856, now seen corresponding path program 1 times [2021-12-06 18:28:30,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:28:30,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1864659047] [2021-12-06 18:28:30,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:30,230 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:28:30,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:28:30,231 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:28:30,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-06 18:28:30,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:30,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-06 18:28:30,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:30,410 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 18:28:30,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:28:30,411 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:28:30,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1864659047] [2021-12-06 18:28:30,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1864659047] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:28:30,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:28:30,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:28:30,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958370175] [2021-12-06 18:28:30,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:28:30,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 18:28:30,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:28:30,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 18:28:30,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 18:28:30,440 INFO L87 Difference]: Start difference. First operand has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 18:28:30,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:30,455 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2021-12-06 18:28:30,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 18:28:30,457 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2021-12-06 18:28:30,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:30,462 INFO L225 Difference]: With dead ends: 51 [2021-12-06 18:28:30,462 INFO L226 Difference]: Without dead ends: 23 [2021-12-06 18:28:30,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 18:28:30,467 INFO L933 BasicCegarLoop]: 33 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, 33 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 [2021-12-06 18:28:30,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:28:30,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-06 18:28:30,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-06 18:28:30,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:28:30,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-12-06 18:28:30,496 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 29 [2021-12-06 18:28:30,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:30,497 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-12-06 18:28:30,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 18:28:30,497 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-12-06 18:28:30,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 18:28:30,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:30,499 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:30,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:28:30,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:28:30,700 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:30,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:30,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1398988038, now seen corresponding path program 1 times [2021-12-06 18:28:30,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:28:30,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [832716643] [2021-12-06 18:28:30,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:30,702 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:28:30,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:28:30,703 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:28:30,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-06 18:28:30,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:30,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:28:30,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:30,835 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 18:28:30,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:28:30,835 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:28:30,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [832716643] [2021-12-06 18:28:30,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [832716643] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:28:30,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:28:30,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:28:30,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267618165] [2021-12-06 18:28:30,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:28:30,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:28:30,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:28:30,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:28:30,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:28:30,838 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 18:28:30,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:30,870 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2021-12-06 18:28:30,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:28:30,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2021-12-06 18:28:30,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:30,871 INFO L225 Difference]: With dead ends: 43 [2021-12-06 18:28:30,871 INFO L226 Difference]: Without dead ends: 25 [2021-12-06 18:28:30,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:28:30,873 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:30,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 41 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:28:30,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-06 18:28:30,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-12-06 18:28:30,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:28:30,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-12-06 18:28:30,878 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 29 [2021-12-06 18:28:30,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:30,878 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-12-06 18:28:30,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 18:28:30,879 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-12-06 18:28:30,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 18:28:30,879 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:30,880 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:30,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-06 18:28:31,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:28:31,081 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:31,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:31,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1708163684, now seen corresponding path program 1 times [2021-12-06 18:28:31,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:28:31,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [405990601] [2021-12-06 18:28:31,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:31,087 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:28:31,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:28:31,090 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:28:31,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-06 18:28:31,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:31,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 18:28:31,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:31,313 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 18:28:31,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:31,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 18:28:31,383 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:28:31,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [405990601] [2021-12-06 18:28:31,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [405990601] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:31,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:28:31,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-06 18:28:31,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825937693] [2021-12-06 18:28:31,384 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:31,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:28:31,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:28:31,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:28:31,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:28:31,385 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-06 18:28:31,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:31,450 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2021-12-06 18:28:31,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:28:31,451 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 31 [2021-12-06 18:28:31,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:31,451 INFO L225 Difference]: With dead ends: 45 [2021-12-06 18:28:31,452 INFO L226 Difference]: Without dead ends: 27 [2021-12-06 18:28:31,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:28:31,453 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:31,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 89 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:28:31,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-06 18:28:31,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-12-06 18:28:31,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:28:31,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-12-06 18:28:31,458 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 31 [2021-12-06 18:28:31,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:31,458 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-12-06 18:28:31,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-06 18:28:31,458 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-12-06 18:28:31,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 18:28:31,459 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:31,459 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:31,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-06 18:28:31,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:28:31,661 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:31,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:31,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1821751230, now seen corresponding path program 2 times [2021-12-06 18:28:31,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:28:31,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1051028435] [2021-12-06 18:28:31,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:28:31,666 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:28:31,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:28:31,669 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:28:31,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-06 18:28:31,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 18:28:31,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:28:31,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:28:31,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:31,822 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 18:28:31,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:28:31,822 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:28:31,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1051028435] [2021-12-06 18:28:31,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1051028435] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:28:31,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:28:31,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:28:31,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087174021] [2021-12-06 18:28:31,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:28:31,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:28:31,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:28:31,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:28:31,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:28:31,824 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 18:28:31,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:31,866 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2021-12-06 18:28:31,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:28:31,866 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2021-12-06 18:28:31,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:31,867 INFO L225 Difference]: With dead ends: 45 [2021-12-06 18:28:31,867 INFO L226 Difference]: Without dead ends: 28 [2021-12-06 18:28:31,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:28:31,868 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 10 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:31,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 28 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:28:31,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-06 18:28:31,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-12-06 18:28:31,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:28:31,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-12-06 18:28:31,873 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 33 [2021-12-06 18:28:31,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:31,873 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-12-06 18:28:31,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 18:28:31,873 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-12-06 18:28:31,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-06 18:28:31,874 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:31,874 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:31,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-06 18:28:32,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:28:32,076 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:32,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:32,078 INFO L85 PathProgramCache]: Analyzing trace with hash 533240604, now seen corresponding path program 1 times [2021-12-06 18:28:32,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:28:32,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [183006121] [2021-12-06 18:28:32,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:32,080 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:28:32,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:28:32,083 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:28:32,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-06 18:28:32,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:32,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 18:28:32,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:32,358 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:28:32,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:32,546 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 18:28:32,546 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:28:32,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [183006121] [2021-12-06 18:28:32,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [183006121] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:32,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:28:32,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-12-06 18:28:32,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708528275] [2021-12-06 18:28:32,547 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:32,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 18:28:32,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:28:32,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 18:28:32,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-12-06 18:28:32,549 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 18:28:32,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:32,762 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2021-12-06 18:28:32,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 18:28:32,763 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2021-12-06 18:28:32,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:32,764 INFO L225 Difference]: With dead ends: 65 [2021-12-06 18:28:32,764 INFO L226 Difference]: Without dead ends: 52 [2021-12-06 18:28:32,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-12-06 18:28:32,766 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 64 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:32,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 62 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:28:32,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-06 18:28:32,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2021-12-06 18:28:32,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:28:32,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-12-06 18:28:32,774 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 39 [2021-12-06 18:28:32,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:32,775 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-12-06 18:28:32,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 18:28:32,775 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-12-06 18:28:32,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 18:28:32,776 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:32,776 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:32,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-06 18:28:32,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:28:32,978 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:32,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:32,979 INFO L85 PathProgramCache]: Analyzing trace with hash 850880602, now seen corresponding path program 1 times [2021-12-06 18:28:32,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:28:32,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [959337349] [2021-12-06 18:28:32,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:32,982 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:28:32,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:28:32,984 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:28:32,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-06 18:28:33,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:33,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-06 18:28:33,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:33,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:28:33,507 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:28:33,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-12-06 18:28:33,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:28:33,801 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:28:33,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 36 [2021-12-06 18:28:33,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:28:33,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:28:33,923 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:28:33,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 48 [2021-12-06 18:28:34,159 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:28:34,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 25 [2021-12-06 18:28:34,297 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 18:28:34,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:45,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2021-12-06 18:28:45,825 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-06 18:28:45,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 1 [2021-12-06 18:28:45,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 111 [2021-12-06 18:28:45,834 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-06 18:28:45,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 249 treesize of output 183 [2021-12-06 18:28:52,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2021-12-06 18:28:52,890 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-06 18:28:52,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 1 [2021-12-06 18:28:53,321 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 14 refuted. 1 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 18:28:53,321 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:28:53,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [959337349] [2021-12-06 18:28:53,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [959337349] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:53,321 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:28:53,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 41 [2021-12-06 18:28:53,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679904489] [2021-12-06 18:28:53,321 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:53,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-06 18:28:53,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:28:53,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-06 18:28:53,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1455, Unknown=1, NotChecked=0, Total=1640 [2021-12-06 18:28:53,323 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 41 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 34 states have internal predecessors, (60), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 18:28:58,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:58,623 INFO L93 Difference]: Finished difference Result 78 states and 98 transitions. [2021-12-06 18:28:58,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 18:28:58,623 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 34 states have internal predecessors, (60), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 41 [2021-12-06 18:28:58,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:58,627 INFO L225 Difference]: With dead ends: 78 [2021-12-06 18:28:58,627 INFO L226 Difference]: Without dead ends: 74 [2021-12-06 18:28:58,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=367, Invalid=2602, Unknown=1, NotChecked=0, Total=2970 [2021-12-06 18:28:58,629 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 64 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:58,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 171 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 719 Invalid, 0 Unknown, 39 Unchecked, 3.0s Time] [2021-12-06 18:28:58,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-06 18:28:58,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2021-12-06 18:28:58,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 49 states have (on average 1.183673469387755) internal successors, (58), 51 states have internal predecessors, (58), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2021-12-06 18:28:58,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 78 transitions. [2021-12-06 18:28:58,644 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 78 transitions. Word has length 41 [2021-12-06 18:28:58,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:58,645 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 78 transitions. [2021-12-06 18:28:58,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 34 states have internal predecessors, (60), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 18:28:58,645 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 78 transitions. [2021-12-06 18:28:58,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 18:28:58,646 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:58,646 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:58,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-06 18:28:58,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:28:58,848 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:58,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:58,850 INFO L85 PathProgramCache]: Analyzing trace with hash 88846840, now seen corresponding path program 2 times [2021-12-06 18:28:58,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:28:58,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1582952915] [2021-12-06 18:28:58,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:28:58,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:28:58,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:28:58,853 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:28:58,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-06 18:28:58,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:28:58,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:28:58,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 18:28:58,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:59,087 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 25 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 18:28:59,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:59,489 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 18:28:59,490 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:28:59,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1582952915] [2021-12-06 18:28:59,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1582952915] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:59,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:28:59,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-12-06 18:28:59,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524243665] [2021-12-06 18:28:59,490 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:59,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 18:28:59,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:28:59,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 18:28:59,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-12-06 18:28:59,491 INFO L87 Difference]: Start difference. First operand 61 states and 78 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 18:28:59,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:59,966 INFO L93 Difference]: Finished difference Result 104 states and 129 transitions. [2021-12-06 18:28:59,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 18:28:59,966 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2021-12-06 18:28:59,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:59,967 INFO L225 Difference]: With dead ends: 104 [2021-12-06 18:28:59,967 INFO L226 Difference]: Without dead ends: 78 [2021-12-06 18:28:59,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-12-06 18:28:59,969 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 126 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:59,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 155 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 18:28:59,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-06 18:28:59,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 50. [2021-12-06 18:28:59,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 42 states have internal predecessors, (46), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 18:28:59,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2021-12-06 18:28:59,976 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 43 [2021-12-06 18:28:59,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:59,976 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2021-12-06 18:28:59,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 18:28:59,976 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2021-12-06 18:28:59,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 18:28:59,977 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:59,977 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:59,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-06 18:29:00,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:29:00,179 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:29:00,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:00,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1417469948, now seen corresponding path program 3 times [2021-12-06 18:29:00,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:29:00,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1980310730] [2021-12-06 18:29:00,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:29:00,183 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:29:00,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:29:00,185 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:29:00,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-06 18:29:00,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 18:29:00,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:29:00,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 18:29:00,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:00,417 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 18:29:00,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:00,594 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 18:29:00,594 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:29:00,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1980310730] [2021-12-06 18:29:00,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1980310730] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:29:00,594 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:29:00,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-12-06 18:29:00,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502965956] [2021-12-06 18:29:00,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:00,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 18:29:00,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:29:00,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 18:29:00,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:29:00,596 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 1 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-06 18:29:00,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:29:00,822 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2021-12-06 18:29:00,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 18:29:00,822 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 1 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 43 [2021-12-06 18:29:00,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:29:00,823 INFO L225 Difference]: With dead ends: 77 [2021-12-06 18:29:00,823 INFO L226 Difference]: Without dead ends: 58 [2021-12-06 18:29:00,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-06 18:29:00,824 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 109 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:29:00,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 117 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:29:00,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-06 18:29:00,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2021-12-06 18:29:00,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 44 states have internal predecessors, (48), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 18:29:00,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2021-12-06 18:29:00,830 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 43 [2021-12-06 18:29:00,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:29:00,830 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2021-12-06 18:29:00,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 1 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-06 18:29:00,831 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2021-12-06 18:29:00,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 18:29:00,831 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:29:00,831 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:29:00,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-06 18:29:01,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:29:01,033 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:29:01,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:01,035 INFO L85 PathProgramCache]: Analyzing trace with hash 2102516822, now seen corresponding path program 4 times [2021-12-06 18:29:01,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:29:01,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2144696419] [2021-12-06 18:29:01,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:29:01,037 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:29:01,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:29:01,039 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:29:01,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-06 18:29:01,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:29:01,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:29:01,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 18:29:01,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:01,268 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 18:29:01,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:01,564 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 18:29:01,564 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:29:01,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2144696419] [2021-12-06 18:29:01,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2144696419] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:29:01,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:29:01,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-12-06 18:29:01,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543978129] [2021-12-06 18:29:01,564 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:01,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 18:29:01,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:29:01,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 18:29:01,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-12-06 18:29:01,565 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 18:29:01,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:29:01,756 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2021-12-06 18:29:01,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 18:29:01,757 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 45 [2021-12-06 18:29:01,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:29:01,758 INFO L225 Difference]: With dead ends: 64 [2021-12-06 18:29:01,758 INFO L226 Difference]: Without dead ends: 33 [2021-12-06 18:29:01,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-12-06 18:29:01,759 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:29:01,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 87 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:29:01,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-06 18:29:01,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-12-06 18:29:01,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:29:01,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-12-06 18:29:01,766 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 45 [2021-12-06 18:29:01,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:29:01,766 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-12-06 18:29:01,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 18:29:01,766 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-12-06 18:29:01,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 18:29:01,767 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:29:01,767 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:29:01,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-06 18:29:01,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:29:01,969 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:29:01,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:01,970 INFO L85 PathProgramCache]: Analyzing trace with hash -457868326, now seen corresponding path program 5 times [2021-12-06 18:29:01,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:29:01,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1920200034] [2021-12-06 18:29:01,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:29:01,972 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:29:01,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:29:01,975 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:29:01,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-06 18:29:02,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-06 18:29:02,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:29:02,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 18:29:02,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:02,216 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 41 proven. 19 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 18:29:02,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:02,504 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 18:29:02,504 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:29:02,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1920200034] [2021-12-06 18:29:02,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1920200034] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:29:02,504 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:29:02,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2021-12-06 18:29:02,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778840031] [2021-12-06 18:29:02,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:02,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 18:29:02,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:29:02,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 18:29:02,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-12-06 18:29:02,505 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 18:29:03,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:29:03,118 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2021-12-06 18:29:03,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 18:29:03,119 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 49 [2021-12-06 18:29:03,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:29:03,120 INFO L225 Difference]: With dead ends: 101 [2021-12-06 18:29:03,120 INFO L226 Difference]: Without dead ends: 82 [2021-12-06 18:29:03,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=229, Invalid=763, Unknown=0, NotChecked=0, Total=992 [2021-12-06 18:29:03,121 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 115 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:29:03,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 173 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:29:03,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-06 18:29:03,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 58. [2021-12-06 18:29:03,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 50 states have internal predecessors, (54), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-06 18:29:03,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2021-12-06 18:29:03,128 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 49 [2021-12-06 18:29:03,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:29:03,128 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2021-12-06 18:29:03,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 18:29:03,128 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2021-12-06 18:29:03,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 18:29:03,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:29:03,129 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:29:03,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-06 18:29:03,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:29:03,330 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:29:03,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:03,330 INFO L85 PathProgramCache]: Analyzing trace with hash -376141416, now seen corresponding path program 6 times [2021-12-06 18:29:03,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:29:03,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2001150] [2021-12-06 18:29:03,331 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:29:03,331 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:29:03,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:29:03,331 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:29:03,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-06 18:29:03,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-06 18:29:03,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:29:03,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-06 18:29:03,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:03,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:03,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:03,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:03,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:29:03,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 37 [2021-12-06 18:29:04,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:29:04,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:04,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:04,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:04,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:04,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:04,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:29:04,262 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-12-06 18:29:04,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 74 [2021-12-06 18:29:04,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:04,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:04,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:04,489 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:29:04,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 51 [2021-12-06 18:29:04,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:04,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:04,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:04,689 INFO L354 Elim1Store]: treesize reduction 72, result has 37.9 percent of original size [2021-12-06 18:29:04,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 81 [2021-12-06 18:29:06,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:06,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:29:06,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:29:06,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 154 treesize of output 85 [2021-12-06 18:29:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:29:06,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:39,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 324 treesize of output 252 [2021-12-06 18:29:39,618 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-12-06 18:29:39,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 982604 treesize of output 1 [2021-12-06 18:29:40,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 138 [2021-12-06 18:29:40,103 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-12-06 18:29:40,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 8858 treesize of output 1 [2021-12-06 18:29:40,111 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-06 18:29:40,111 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:29:40,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2001150] [2021-12-06 18:29:40,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2001150] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:29:40,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:29:40,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24] total 48 [2021-12-06 18:29:40,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144410536] [2021-12-06 18:29:40,112 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:40,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 18:29:40,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:29:40,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 18:29:40,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2062, Unknown=11, NotChecked=0, Total=2256 [2021-12-06 18:29:40,113 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 48 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 40 states have internal predecessors, (62), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 18:30:38,857 WARN L227 SmtUtils]: Spent 58.39s on a formula simplification. DAG size of input: 184 DAG size of output: 149 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:30:57,456 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:30:59,663 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:31:39,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:31:39,761 INFO L93 Difference]: Finished difference Result 107 states and 118 transitions. [2021-12-06 18:31:39,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-06 18:31:39,763 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 40 states have internal predecessors, (62), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 51 [2021-12-06 18:31:39,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:31:39,764 INFO L225 Difference]: With dead ends: 107 [2021-12-06 18:31:39,764 INFO L226 Difference]: Without dead ends: 91 [2021-12-06 18:31:39,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1855 ImplicationChecksByTransitivity, 144.8s TimeCoverageRelationStatistics Valid=453, Invalid=5222, Unknown=25, NotChecked=0, Total=5700 [2021-12-06 18:31:39,766 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 81 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 294 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:31:39,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 134 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 835 Invalid, 2 Unknown, 294 Unchecked, 8.4s Time] [2021-12-06 18:31:39,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-06 18:31:39,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 81. [2021-12-06 18:31:39,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 70 states have (on average 1.0857142857142856) internal successors, (76), 70 states have internal predecessors, (76), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-06 18:31:39,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2021-12-06 18:31:39,778 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 51 [2021-12-06 18:31:39,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:31:39,778 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2021-12-06 18:31:39,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 40 states have internal predecessors, (62), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 18:31:39,779 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2021-12-06 18:31:39,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-06 18:31:39,779 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:31:39,779 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:31:39,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-06 18:31:39,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:31:39,981 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:31:39,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:31:39,982 INFO L85 PathProgramCache]: Analyzing trace with hash -923731914, now seen corresponding path program 7 times [2021-12-06 18:31:39,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:31:39,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2016128619] [2021-12-06 18:31:39,984 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:31:39,984 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:31:39,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:31:39,987 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:31:39,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-06 18:31:40,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:31:40,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 18:31:40,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:31:40,278 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 33 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 18:31:40,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:31:40,677 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-06 18:31:40,677 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:31:40,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2016128619] [2021-12-06 18:31:40,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2016128619] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:31:40,678 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:31:40,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-12-06 18:31:40,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576938390] [2021-12-06 18:31:40,678 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:31:40,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 18:31:40,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:31:40,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 18:31:40,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-12-06 18:31:40,679 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand has 21 states, 20 states have (on average 2.75) internal successors, (55), 21 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 18:31:41,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:31:41,280 INFO L93 Difference]: Finished difference Result 184 states and 198 transitions. [2021-12-06 18:31:41,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 18:31:41,281 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.75) internal successors, (55), 21 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 3 states have call successors, (6) Word has length 53 [2021-12-06 18:31:41,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:31:41,282 INFO L225 Difference]: With dead ends: 184 [2021-12-06 18:31:41,282 INFO L226 Difference]: Without dead ends: 130 [2021-12-06 18:31:41,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-12-06 18:31:41,283 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 167 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:31:41,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 144 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 18:31:41,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-06 18:31:41,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 93. [2021-12-06 18:31:41,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 80 states have (on average 1.0875) internal successors, (87), 81 states have internal predecessors, (87), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-06 18:31:41,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 101 transitions. [2021-12-06 18:31:41,292 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 101 transitions. Word has length 53 [2021-12-06 18:31:41,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:31:41,292 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 101 transitions. [2021-12-06 18:31:41,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.75) internal successors, (55), 21 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 18:31:41,293 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 101 transitions. [2021-12-06 18:31:41,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 18:31:41,293 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:31:41,293 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:31:41,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-06 18:31:41,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:31:41,495 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:31:41,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:31:41,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1911365268, now seen corresponding path program 8 times [2021-12-06 18:31:41,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:31:41,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [218610966] [2021-12-06 18:31:41,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:31:41,498 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:31:41,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:31:41,500 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:31:41,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-06 18:31:41,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:31:41,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:31:41,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 18:31:41,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:31:41,825 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 44 proven. 13 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-06 18:31:41,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:31:42,355 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-06 18:31:42,356 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:31:42,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [218610966] [2021-12-06 18:31:42,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [218610966] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:31:42,356 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:31:42,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-12-06 18:31:42,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957745408] [2021-12-06 18:31:42,356 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:31:42,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 18:31:42,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:31:42,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 18:31:42,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-12-06 18:31:42,357 INFO L87 Difference]: Start difference. First operand 93 states and 101 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 18:31:43,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:31:43,067 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2021-12-06 18:31:43,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 18:31:43,069 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 55 [2021-12-06 18:31:43,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:31:43,070 INFO L225 Difference]: With dead ends: 130 [2021-12-06 18:31:43,070 INFO L226 Difference]: Without dead ends: 84 [2021-12-06 18:31:43,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2021-12-06 18:31:43,071 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 63 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:31:43,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 105 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 18:31:43,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-06 18:31:43,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-12-06 18:31:43,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 72 states have internal predecessors, (78), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-06 18:31:43,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2021-12-06 18:31:43,080 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 55 [2021-12-06 18:31:43,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:31:43,081 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2021-12-06 18:31:43,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 18:31:43,081 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2021-12-06 18:31:43,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 18:31:43,081 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:31:43,081 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:31:43,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-12-06 18:31:43,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:31:43,283 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:31:43,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:31:43,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1109789912, now seen corresponding path program 9 times [2021-12-06 18:31:43,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:31:43,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [856251070] [2021-12-06 18:31:43,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:31:43,287 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:31:43,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:31:43,288 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:31:43,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-06 18:31:43,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-06 18:31:43,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:31:43,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 18:31:43,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:31:43,565 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 37 proven. 20 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-06 18:31:43,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:31:44,080 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 44 proven. 13 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-06 18:31:44,080 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:31:44,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [856251070] [2021-12-06 18:31:44,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [856251070] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:31:44,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:31:44,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-12-06 18:31:44,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012707276] [2021-12-06 18:31:44,081 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:31:44,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 18:31:44,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:31:44,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 18:31:44,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-12-06 18:31:44,082 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 18:31:44,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:31:44,557 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2021-12-06 18:31:44,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:31:44,558 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 55 [2021-12-06 18:31:44,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:31:44,559 INFO L225 Difference]: With dead ends: 95 [2021-12-06 18:31:44,559 INFO L226 Difference]: Without dead ends: 52 [2021-12-06 18:31:44,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-12-06 18:31:44,560 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 79 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:31:44,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 83 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:31:44,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-06 18:31:44,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2021-12-06 18:31:44,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:31:44,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2021-12-06 18:31:44,564 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 55 [2021-12-06 18:31:44,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:31:44,565 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2021-12-06 18:31:44,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 18:31:44,565 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2021-12-06 18:31:44,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-06 18:31:44,565 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:31:44,565 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:31:44,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-06 18:31:44,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:31:44,767 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:31:44,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:31:44,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1335258344, now seen corresponding path program 10 times [2021-12-06 18:31:44,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:31:44,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1546417040] [2021-12-06 18:31:44,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:31:44,770 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:31:44,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:31:44,773 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:31:44,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-06 18:31:44,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:31:44,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:31:44,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 18:31:44,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:31:45,164 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 58 proven. 20 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-06 18:31:45,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:31:46,195 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-12-06 18:31:46,195 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:31:46,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1546417040] [2021-12-06 18:31:46,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1546417040] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:31:46,195 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:31:46,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-12-06 18:31:46,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455549975] [2021-12-06 18:31:46,195 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:31:46,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 18:31:46,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:31:46,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 18:31:46,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-12-06 18:31:46,196 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 18:31:47,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:31:47,081 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2021-12-06 18:31:47,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 18:31:47,082 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 59 [2021-12-06 18:31:47,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:31:47,082 INFO L225 Difference]: With dead ends: 111 [2021-12-06 18:31:47,082 INFO L226 Difference]: Without dead ends: 94 [2021-12-06 18:31:47,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=263, Invalid=729, Unknown=0, NotChecked=0, Total=992 [2021-12-06 18:31:47,083 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 98 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:31:47,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 138 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 18:31:47,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-06 18:31:47,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 51. [2021-12-06 18:31:47,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 45 states have internal predecessors, (49), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:31:47,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2021-12-06 18:31:47,088 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 59 [2021-12-06 18:31:47,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:31:47,089 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2021-12-06 18:31:47,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 18:31:47,089 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2021-12-06 18:31:47,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 18:31:47,089 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:31:47,089 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:31:47,097 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-12-06 18:31:47,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:31:47,291 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:31:47,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:31:47,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1053245782, now seen corresponding path program 11 times [2021-12-06 18:31:47,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:31:47,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1329139038] [2021-12-06 18:31:47,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:31:47,294 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:31:47,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:31:47,296 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:31:47,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-06 18:31:47,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-12-06 18:31:47,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:31:47,873 WARN L261 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-06 18:31:47,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:31:47,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 18:31:48,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:31:48,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:31:48,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:31:48,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:31:48,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:31:48,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:31:48,844 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:31:48,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 49 [2021-12-06 18:31:50,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:31:50,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:31:50,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:31:50,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:31:50,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:31:50,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:31:50,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:31:50,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:31:50,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:31:50,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:31:50,489 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-12-06 18:31:50,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 104 treesize of output 89 [2021-12-06 18:31:50,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:31:50,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:31:50,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:31:50,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:31:50,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:31:50,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:31:50,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:31:50,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:31:50,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:31:50,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:31:50,992 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-12-06 18:31:50,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 102 treesize of output 89 [2021-12-06 18:31:51,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:31:51,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:31:51,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:31:51,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:31:51,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:31:51,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:31:51,508 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:31:51,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 95 treesize of output 66 [2021-12-06 18:31:51,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:31:51,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:31:51,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:31:51,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:31:51,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:31:51,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:31:51,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:31:51,825 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:31:51,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 78 [2021-12-06 18:31:52,574 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:31:52,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 43 [2021-12-06 18:31:52,994 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 8 proven. 121 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:31:52,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:34:04,031 WARN L838 $PredicateComparison]: unable to prove that (forall ((~N~0 (_ BitVec 32))) (or (let ((.cse12 (select |c_#memory_int| |c_xor_#in~x.base|))) (let ((.cse7 (bvadd (_ bv4 32) |c_xor_#in~x.offset|)) (.cse2 (select .cse12 |c_xor_#in~x.offset|))) (let ((.cse3 (store (store .cse12 |c_xor_#in~x.offset| (select .cse12 .cse7)) .cse7 .cse2))) (let ((.cse0 ((_ extract 31 0) (let ((.cse10 (select |c_#memory_int| c_xor_~x.base)) (.cse11 (bvmul c_xor_~i~0 (_ bv4 32)))) (bvxor (bvxor (bvxor c_xor_~res~0 ((_ sign_extend 32) (select .cse10 (bvadd c_xor_~x.offset .cse11)))) ((_ sign_extend 32) (select .cse10 (bvadd (_ bv4 32) c_xor_~x.offset .cse11)))) ((_ sign_extend 32) (select .cse10 (bvadd c_xor_~x.offset (_ bv8 32) .cse11))))))) (.cse5 (bvadd (_ bv12 32) |c_xor_#in~x.offset|)) (.cse4 (bvadd (_ bv8 32) |c_xor_#in~x.offset|)) (.cse1 (select .cse3 |c_xor_#in~x.offset|))) (and (= .cse0 ((_ extract 31 0) (bvxor (bvxor (bvxor ((_ sign_extend 32) .cse1) ((_ sign_extend 32) .cse2)) ((_ sign_extend 32) (select .cse3 .cse4))) ((_ sign_extend 32) (select .cse3 .cse5))))) (= .cse0 ((_ extract 31 0) (let ((.cse6 (store (let ((.cse8 (let ((.cse9 (store .cse3 |c_xor_#in~x.offset| .cse2))) (store .cse9 .cse7 (select .cse9 .cse4))))) (store .cse8 .cse4 (select .cse8 .cse5))) (bvadd (_ bv4294967292 32) (bvmul ~N~0 (_ bv4 32)) |c_xor_#in~x.offset|) .cse1))) (bvxor (bvxor (bvxor ((_ sign_extend 32) (select .cse6 |c_xor_#in~x.offset|)) ((_ sign_extend 32) (select .cse6 .cse7))) ((_ sign_extend 32) (select .cse6 .cse4))) ((_ sign_extend 32) (select .cse6 .cse5))))))))))) (bvslt (_ bv4 32) ~N~0) (not (bvslt (bvadd (_ bv2 32) c_xor_~i~0) ~N~0)) (not (bvslt (_ bv1 32) ~N~0)) (bvslt (bvadd c_xor_~i~0 (_ bv3 32)) ~N~0))) is different from false [2021-12-06 18:34:04,658 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 107 refuted. 2 times theorem prover too weak. 19 trivial. 11 not checked. [2021-12-06 18:34:04,658 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:34:04,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1329139038] [2021-12-06 18:34:04,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1329139038] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:34:04,658 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:34:04,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 39] total 73 [2021-12-06 18:34:04,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801163818] [2021-12-06 18:34:04,659 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:34:04,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-12-06 18:34:04,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:34:04,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-12-06 18:34:04,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=4765, Unknown=36, NotChecked=140, Total=5256 [2021-12-06 18:34:04,662 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 73 states, 69 states have (on average 1.3478260869565217) internal successors, (93), 66 states have internal predecessors, (93), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 18:34:13,209 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:34:32,565 WARN L227 SmtUtils]: Spent 8.01s on a formula simplification. DAG size of input: 132 DAG size of output: 94 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:34:38,988 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:34:41,019 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:34:43,174 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:35:15,317 WARN L227 SmtUtils]: Spent 12.21s on a formula simplification. DAG size of input: 194 DAG size of output: 143 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:35:47,063 WARN L227 SmtUtils]: Spent 6.96s on a formula simplification. DAG size of input: 124 DAG size of output: 91 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:35:59,759 WARN L227 SmtUtils]: Spent 6.96s on a formula simplification. DAG size of input: 130 DAG size of output: 97 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:36:01,844 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:36:08,887 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:36:11,322 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:36:13,377 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:36:20,139 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:36:22,151 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:36:24,322 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:36:26,338 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:36:30,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:36:30,821 INFO L93 Difference]: Finished difference Result 161 states and 198 transitions. [2021-12-06 18:36:30,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-06 18:36:30,822 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 69 states have (on average 1.3478260869565217) internal successors, (93), 66 states have internal predecessors, (93), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 61 [2021-12-06 18:36:30,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:36:30,824 INFO L225 Difference]: With dead ends: 161 [2021-12-06 18:36:30,824 INFO L226 Difference]: Without dead ends: 128 [2021-12-06 18:36:30,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 99 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 2523 ImplicationChecksByTransitivity, 241.6s TimeCoverageRelationStatistics Valid=620, Invalid=9238, Unknown=46, NotChecked=196, Total=10100 [2021-12-06 18:36:30,827 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 56 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 1637 mSolverCounterSat, 99 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 2370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1637 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 623 IncrementalHoareTripleChecker+Unchecked, 36.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:36:30,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 245 Invalid, 2370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1637 Invalid, 11 Unknown, 623 Unchecked, 36.1s Time] [2021-12-06 18:36:30,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-06 18:36:30,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 94. [2021-12-06 18:36:30,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 84 states have internal predecessors, (93), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-12-06 18:36:30,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2021-12-06 18:36:30,840 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 61 [2021-12-06 18:36:30,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:36:30,841 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2021-12-06 18:36:30,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 69 states have (on average 1.3478260869565217) internal successors, (93), 66 states have internal predecessors, (93), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 18:36:30,841 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2021-12-06 18:36:30,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 18:36:30,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:36:30,842 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:36:30,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-12-06 18:36:31,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:36:31,044 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:36:31,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:36:31,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1288256500, now seen corresponding path program 12 times [2021-12-06 18:36:31,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:36:31,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [875310748] [2021-12-06 18:36:31,047 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:36:31,047 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:36:31,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:36:31,049 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:36:31,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-06 18:36:31,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-06 18:36:31,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:36:31,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 18:36:31,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:36:31,667 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 61 proven. 70 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-06 18:36:31,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:36:32,212 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 77 proven. 18 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-06 18:36:32,212 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:36:32,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [875310748] [2021-12-06 18:36:32,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [875310748] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:36:32,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:36:32,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-12-06 18:36:32,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903015622] [2021-12-06 18:36:32,213 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:36:32,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 18:36:32,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:36:32,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 18:36:32,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2021-12-06 18:36:32,214 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 states have internal predecessors, (77), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 18:36:33,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:36:33,544 INFO L93 Difference]: Finished difference Result 156 states and 180 transitions. [2021-12-06 18:36:33,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 18:36:33,545 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 states have internal predecessors, (77), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 63 [2021-12-06 18:36:33,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:36:33,546 INFO L225 Difference]: With dead ends: 156 [2021-12-06 18:36:33,546 INFO L226 Difference]: Without dead ends: 75 [2021-12-06 18:36:33,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=256, Invalid=1004, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 18:36:33,547 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 126 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:36:33,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 149 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 18:36:33,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-06 18:36:33,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 57. [2021-12-06 18:36:33,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:36:33,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2021-12-06 18:36:33,553 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 63 [2021-12-06 18:36:33,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:36:33,553 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2021-12-06 18:36:33,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 states have internal predecessors, (77), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 18:36:33,553 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2021-12-06 18:36:33,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-06 18:36:33,554 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:36:33,554 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:36:33,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-12-06 18:36:33,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:36:33,756 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:36:33,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:36:33,757 INFO L85 PathProgramCache]: Analyzing trace with hash -953393422, now seen corresponding path program 13 times [2021-12-06 18:36:33,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:36:33,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [678765561] [2021-12-06 18:36:33,758 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:36:33,759 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:36:33,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:36:33,761 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:36:33,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-06 18:36:33,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:33,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 18:36:33,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:36:34,170 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 73 proven. 25 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-12-06 18:36:34,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:36:34,776 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 7 proven. 113 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-06 18:36:34,777 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:36:34,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [678765561] [2021-12-06 18:36:34,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [678765561] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:36:34,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:36:34,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-12-06 18:36:34,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052962278] [2021-12-06 18:36:34,777 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:36:34,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 18:36:34,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:36:34,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 18:36:34,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2021-12-06 18:36:34,778 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 26 states, 25 states have (on average 2.52) internal successors, (63), 26 states have internal predecessors, (63), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 18:36:35,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:36:35,394 INFO L93 Difference]: Finished difference Result 113 states and 121 transitions. [2021-12-06 18:36:35,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 18:36:35,396 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.52) internal successors, (63), 26 states have internal predecessors, (63), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 3 states have call successors, (6) Word has length 69 [2021-12-06 18:36:35,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:36:35,396 INFO L225 Difference]: With dead ends: 113 [2021-12-06 18:36:35,396 INFO L226 Difference]: Without dead ends: 60 [2021-12-06 18:36:35,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=693, Unknown=0, NotChecked=0, Total=870 [2021-12-06 18:36:35,397 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 112 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:36:35,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 69 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 18:36:35,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-06 18:36:35,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-12-06 18:36:35,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:36:35,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2021-12-06 18:36:35,406 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 69 [2021-12-06 18:36:35,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:36:35,406 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2021-12-06 18:36:35,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.52) internal successors, (63), 26 states have internal predecessors, (63), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 18:36:35,407 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2021-12-06 18:36:35,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-06 18:36:35,407 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:36:35,407 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:36:35,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-12-06 18:36:35,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:36:35,609 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:36:35,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:36:35,610 INFO L85 PathProgramCache]: Analyzing trace with hash -2026377324, now seen corresponding path program 14 times [2021-12-06 18:36:35,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:36:35,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [708363986] [2021-12-06 18:36:35,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:36:35,612 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:36:35,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:36:35,614 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:36:35,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32ebe9b-483a-462e-9a20-bc711b762812/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-06 18:36:36,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:36:36,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:36:36,138 WARN L261 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 93 conjunts are in the unsatisfiable core [2021-12-06 18:36:36,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:36:36,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:36:36,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:36:36,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:36:36,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:36:37,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:37,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:37,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:37,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:37,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:37,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:37,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:37,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:37,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:37,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:37,570 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:36:37,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 61 [2021-12-06 18:36:38,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:36:38,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:38,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:38,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:38,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:38,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:38,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:38,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:38,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:38,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:38,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:36:38,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:38,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:38,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:38,504 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-12-06 18:36:38,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 122 treesize of output 104 [2021-12-06 18:36:38,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:38,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:38,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:36:38,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:38,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:38,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:38,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:38,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:38,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:38,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:38,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:36:38,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:38,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:38,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:38,996 INFO L354 Elim1Store]: treesize reduction 4, result has 42.9 percent of original size [2021-12-06 18:36:38,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 127 treesize of output 112 [2021-12-06 18:36:39,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:39,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:36:39,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:39,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:39,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:39,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:39,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:39,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:39,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:39,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:39,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:39,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:39,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:39,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:39,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:36:39,535 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-12-06 18:36:39,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 118 treesize of output 104 [2021-12-06 18:36:40,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:40,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:40,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:40,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:40,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:40,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:40,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:40,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:40,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:40,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:40,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:36:40,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 113 treesize of output 81 [2021-12-06 18:36:40,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:40,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:40,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:40,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:40,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:40,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:40,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:40,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:40,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:40,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:40,516 INFO L354 Elim1Store]: treesize reduction 124, result has 37.4 percent of original size [2021-12-06 18:36:40,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 110 treesize of output 123 [2021-12-06 18:36:52,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:36:52,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:36:52,991 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:36:52,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 218 treesize of output 133 [2021-12-06 18:36:53,806 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 20 proven. 185 refuted. 6 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 18:36:53,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:39:31,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7202 treesize of output 6842