./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/max05-1.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_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/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_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/max05-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/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_f69747fa-62b4-427d-b19e-3f99d8d86302/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 4e48915cf0eaefe43320bbe59bf88f5c68b2f305d293e808fa6ece9112b5c238 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:22:48,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:22:48,368 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:22:48,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:22:48,391 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:22:48,392 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:22:48,393 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:22:48,394 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:22:48,396 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:22:48,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:22:48,397 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:22:48,398 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:22:48,399 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:22:48,399 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:22:48,401 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:22:48,402 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:22:48,402 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:22:48,403 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:22:48,405 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:22:48,407 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:22:48,408 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:22:48,409 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:22:48,411 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:22:48,411 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:22:48,414 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:22:48,414 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:22:48,415 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:22:48,415 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:22:48,416 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:22:48,417 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:22:48,417 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:22:48,417 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:22:48,418 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:22:48,419 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:22:48,419 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:22:48,420 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:22:48,420 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:22:48,420 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:22:48,421 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:22:48,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:22:48,422 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:22:48,422 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 19:22:48,438 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:22:48,439 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:22:48,439 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:22:48,439 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:22:48,441 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:22:48,441 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:22:48,441 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:22:48,441 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:22:48,442 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:22:48,442 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:22:48,442 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 19:22:48,442 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 19:22:48,442 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 19:22:48,442 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:22:48,442 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 19:22:48,442 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:22:48,442 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 19:22:48,443 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 19:22:48,443 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 19:22:48,443 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:22:48,443 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 19:22:48,443 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:22:48,443 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:22:48,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:22:48,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:22:48,444 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:22:48,444 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:22:48,444 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 19:22:48,444 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 19:22:48,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 19:22:48,444 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 19:22:48,444 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 19:22:48,444 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 19:22:48,444 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:22:48,444 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_f69747fa-62b4-427d-b19e-3f99d8d86302/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4e48915cf0eaefe43320bbe59bf88f5c68b2f305d293e808fa6ece9112b5c238 [2021-12-06 19:22:48,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:22:48,638 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:22:48,640 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:22:48,641 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:22:48,642 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:22:48,643 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/reducercommutativity/max05-1.i [2021-12-06 19:22:48,689 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/data/acf746089/a286351e052d47729bca323dc74c2291/FLAG1452117ba [2021-12-06 19:22:49,064 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:22:49,064 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/sv-benchmarks/c/reducercommutativity/max05-1.i [2021-12-06 19:22:49,068 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/data/acf746089/a286351e052d47729bca323dc74c2291/FLAG1452117ba [2021-12-06 19:22:49,078 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/data/acf746089/a286351e052d47729bca323dc74c2291 [2021-12-06 19:22:49,079 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:22:49,080 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:22:49,082 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:22:49,082 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:22:49,084 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:22:49,085 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:22:49" (1/1) ... [2021-12-06 19:22:49,086 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18348439 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:22:49, skipping insertion in model container [2021-12-06 19:22:49,086 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:22:49" (1/1) ... [2021-12-06 19:22:49,091 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:22:49,102 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:22:49,213 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_f69747fa-62b4-427d-b19e-3f99d8d86302/sv-benchmarks/c/reducercommutativity/max05-1.i[1284,1297] [2021-12-06 19:22:49,216 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:22:49,223 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:22:49,239 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_f69747fa-62b4-427d-b19e-3f99d8d86302/sv-benchmarks/c/reducercommutativity/max05-1.i[1284,1297] [2021-12-06 19:22:49,240 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:22:49,250 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:22:49,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:22:49 WrapperNode [2021-12-06 19:22:49,250 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:22:49,251 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:22:49,251 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:22:49,251 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:22:49,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:22:49" (1/1) ... [2021-12-06 19:22:49,262 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:22:49" (1/1) ... [2021-12-06 19:22:49,277 INFO L137 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2021-12-06 19:22:49,277 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:22:49,277 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:22:49,278 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:22:49,278 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:22:49,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:22:49" (1/1) ... [2021-12-06 19:22:49,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:22:49" (1/1) ... [2021-12-06 19:22:49,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:22:49" (1/1) ... [2021-12-06 19:22:49,286 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:22:49" (1/1) ... [2021-12-06 19:22:49,291 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:22:49" (1/1) ... [2021-12-06 19:22:49,294 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:22:49" (1/1) ... [2021-12-06 19:22:49,295 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:22:49" (1/1) ... [2021-12-06 19:22:49,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:22:49,297 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:22:49,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:22:49,297 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:22:49,298 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:22:49" (1/1) ... [2021-12-06 19:22:49,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:22:49,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:22:49,326 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 19:22:49,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 19:22:49,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 19:22:49,365 INFO L130 BoogieDeclarations]: Found specification of procedure max [2021-12-06 19:22:49,365 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2021-12-06 19:22:49,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 19:22:49,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 19:22:49,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 19:22:49,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:22:49,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:22:49,366 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 19:22:49,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 19:22:49,426 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:22:49,427 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:22:49,525 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:22:49,530 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:22:49,530 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-06 19:22:49,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:22:49 BoogieIcfgContainer [2021-12-06 19:22:49,531 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:22:49,533 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 19:22:49,533 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 19:22:49,537 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 19:22:49,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:22:49" (1/3) ... [2021-12-06 19:22:49,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@151d58c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:22:49, skipping insertion in model container [2021-12-06 19:22:49,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:22:49" (2/3) ... [2021-12-06 19:22:49,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@151d58c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:22:49, skipping insertion in model container [2021-12-06 19:22:49,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:22:49" (3/3) ... [2021-12-06 19:22:49,540 INFO L111 eAbstractionObserver]: Analyzing ICFG max05-1.i [2021-12-06 19:22:49,553 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 19:22:49,554 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 19:22:49,596 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 19:22:49,601 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 19:22:49,601 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 19:22:49,614 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 19:22:49,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 19:22:49,621 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:22:49,621 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] [2021-12-06 19:22:49,622 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:22:49,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:22:49,626 INFO L85 PathProgramCache]: Analyzing trace with hash -528134526, now seen corresponding path program 1 times [2021-12-06 19:22:49,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:22:49,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611714050] [2021-12-06 19:22:49,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:22:49,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:22:49,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:49,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:22:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:49,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 19:22:49,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:49,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:22:49,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:49,772 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 19:22:49,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:22:49,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611714050] [2021-12-06 19:22:49,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611714050] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:22:49,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:22:49,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:22:49,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651659438] [2021-12-06 19:22:49,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:22:49,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 19:22:49,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:22:49,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 19:22:49,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 19:22:49,800 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 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 19:22:49,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:22:49,815 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2021-12-06 19:22:49,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 19:22:49,817 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 28 [2021-12-06 19:22:49,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:22:49,824 INFO L225 Difference]: With dead ends: 52 [2021-12-06 19:22:49,824 INFO L226 Difference]: Without dead ends: 24 [2021-12-06 19:22:49,827 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 19:22:49,832 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 19:22:49,833 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 19:22:49,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-06 19:22:49,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-06 19:22:49,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 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 19:22:49,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-12-06 19:22:49,863 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 28 [2021-12-06 19:22:49,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:22:49,863 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-12-06 19:22:49,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 19:22:49,863 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-12-06 19:22:49,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 19:22:49,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:22:49,865 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] [2021-12-06 19:22:49,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 19:22:49,865 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:22:49,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:22:49,866 INFO L85 PathProgramCache]: Analyzing trace with hash -321958693, now seen corresponding path program 1 times [2021-12-06 19:22:49,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:22:49,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292040646] [2021-12-06 19:22:49,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:22:49,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:22:49,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:49,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:22:49,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:49,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 19:22:49,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:49,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:22:49,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:49,941 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 19:22:49,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:22:49,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292040646] [2021-12-06 19:22:49,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292040646] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:22:49,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677458774] [2021-12-06 19:22:49,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:22:49,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:22:49,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:22:49,944 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:22:49,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 19:22:50,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:50,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 19:22:50,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:22:50,062 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 19:22:50,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:22:50,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677458774] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:22:50,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:22:50,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-06 19:22:50,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686374186] [2021-12-06 19:22:50,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:22:50,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:22:50,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:22:50,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:22:50,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:22:50,066 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 19:22:50,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:22:50,079 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2021-12-06 19:22:50,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:22:50,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 28 [2021-12-06 19:22:50,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:22:50,081 INFO L225 Difference]: With dead ends: 46 [2021-12-06 19:22:50,081 INFO L226 Difference]: Without dead ends: 26 [2021-12-06 19:22:50,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:22:50,084 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:22:50,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 52 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:22:50,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-06 19:22:50,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-12-06 19:22:50,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 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 19:22:50,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-12-06 19:22:50,091 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 28 [2021-12-06 19:22:50,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:22:50,091 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-12-06 19:22:50,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 19:22:50,092 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-12-06 19:22:50,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 19:22:50,093 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:22:50,093 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] [2021-12-06 19:22:50,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 19:22:50,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:22:50,295 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:22:50,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:22:50,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1777476163, now seen corresponding path program 1 times [2021-12-06 19:22:50,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:22:50,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255759593] [2021-12-06 19:22:50,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:22:50,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:22:50,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:50,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 19:22:50,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:50,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:22:50,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:50,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 19:22:50,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:50,468 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 19:22:50,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:22:50,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255759593] [2021-12-06 19:22:50,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255759593] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:22:50,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628889781] [2021-12-06 19:22:50,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:22:50,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:22:50,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:22:50,476 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:22:50,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 19:22:50,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:50,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 19:22:50,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:22:50,554 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 19:22:50,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:22:50,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628889781] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:22:50,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:22:50,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-06 19:22:50,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467419815] [2021-12-06 19:22:50,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:22:50,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:22:50,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:22:50,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:22:50,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:22:50,555 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 19:22:50,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:22:50,565 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-12-06 19:22:50,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:22:50,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-12-06 19:22:50,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:22:50,566 INFO L225 Difference]: With dead ends: 48 [2021-12-06 19:22:50,566 INFO L226 Difference]: Without dead ends: 29 [2021-12-06 19:22:50,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:22:50,567 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:22:50,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 50 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:22:50,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-06 19:22:50,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2021-12-06 19:22:50,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 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 19:22:50,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-12-06 19:22:50,572 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 30 [2021-12-06 19:22:50,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:22:50,572 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-12-06 19:22:50,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 19:22:50,573 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-12-06 19:22:50,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-06 19:22:50,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:22:50,574 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] [2021-12-06 19:22:50,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 19:22:50,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:22:50,775 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:22:50,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:22:50,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1540631384, now seen corresponding path program 1 times [2021-12-06 19:22:50,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:22:50,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449091693] [2021-12-06 19:22:50,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:22:50,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:22:50,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:50,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 19:22:50,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:50,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:22:50,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:50,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 19:22:50,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:50,991 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 19:22:50,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:22:50,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449091693] [2021-12-06 19:22:50,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449091693] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:22:50,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009303841] [2021-12-06 19:22:50,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:22:50,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:22:50,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:22:50,993 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:22:50,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 19:22:51,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:51,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 19:22:51,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:22:51,083 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 19:22:51,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:22:51,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009303841] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:22:51,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:22:51,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-06 19:22:51,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347052155] [2021-12-06 19:22:51,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:22:51,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:22:51,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:22:51,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:22:51,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:22:51,086 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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 19:22:51,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:22:51,095 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2021-12-06 19:22:51,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:22:51,096 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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 42 [2021-12-06 19:22:51,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:22:51,097 INFO L225 Difference]: With dead ends: 43 [2021-12-06 19:22:51,097 INFO L226 Difference]: Without dead ends: 28 [2021-12-06 19:22:51,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:22:51,098 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:22:51,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 51 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:22:51,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-06 19:22:51,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-12-06 19:22:51,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 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 19:22:51,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-12-06 19:22:51,102 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 42 [2021-12-06 19:22:51,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:22:51,103 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-12-06 19:22:51,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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 19:22:51,104 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-12-06 19:22:51,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 19:22:51,105 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:22:51,105 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, 1] [2021-12-06 19:22:51,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 19:22:51,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:22:51,306 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:22:51,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:22:51,308 INFO L85 PathProgramCache]: Analyzing trace with hash -180199466, now seen corresponding path program 1 times [2021-12-06 19:22:51,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:22:51,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577677248] [2021-12-06 19:22:51,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:22:51,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:22:51,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:51,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 19:22:51,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:51,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:22:51,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:51,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 19:22:51,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:51,413 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 19:22:51,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:22:51,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577677248] [2021-12-06 19:22:51,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577677248] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:22:51,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118250075] [2021-12-06 19:22:51,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:22:51,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:22:51,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:22:51,414 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:22:51,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 19:22:51,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:51,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:22:51,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:22:51,522 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-06 19:22:51,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:22:51,585 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-06 19:22:51,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118250075] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:22:51,585 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:22:51,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2021-12-06 19:22:51,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971263265] [2021-12-06 19:22:51,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:22:51,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 19:22:51,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:22:51,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 19:22:51,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:22:51,587 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 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 19:22:51,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:22:51,620 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2021-12-06 19:22:51,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 19:22:51,620 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 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 44 [2021-12-06 19:22:51,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:22:51,621 INFO L225 Difference]: With dead ends: 62 [2021-12-06 19:22:51,621 INFO L226 Difference]: Without dead ends: 40 [2021-12-06 19:22:51,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:22:51,623 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:22:51,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 70 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:22:51,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-06 19:22:51,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2021-12-06 19:22:51,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 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 19:22:51,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2021-12-06 19:22:51,631 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 44 [2021-12-06 19:22:51,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:22:51,631 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2021-12-06 19:22:51,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 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 19:22:51,631 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2021-12-06 19:22:51,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-06 19:22:51,633 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:22:51,633 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:22:51,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 19:22:51,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:22:51,835 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:22:51,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:22:51,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1875433, now seen corresponding path program 2 times [2021-12-06 19:22:51,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:22:51,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223058417] [2021-12-06 19:22:51,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:22:51,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:22:51,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:52,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 19:22:52,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:52,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 19:22:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:52,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 19:22:52,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-06 19:22:52,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:22:52,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223058417] [2021-12-06 19:22:52,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223058417] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:22:52,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550477029] [2021-12-06 19:22:52,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:22:52,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:22:52,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:22:52,057 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:22:52,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 19:22:52,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:22:52,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:22:52,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 19:22:52,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:22:52,187 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-06 19:22:52,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:22:52,239 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-06 19:22:52,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550477029] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:22:52,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:22:52,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 9 [2021-12-06 19:22:52,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018696827] [2021-12-06 19:22:52,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:22:52,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 19:22:52,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:22:52,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 19:22:52,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:22:52,241 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 19:22:52,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:22:52,264 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2021-12-06 19:22:52,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 19:22:52,265 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2021-12-06 19:22:52,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:22:52,265 INFO L225 Difference]: With dead ends: 68 [2021-12-06 19:22:52,266 INFO L226 Difference]: Without dead ends: 42 [2021-12-06 19:22:52,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:22:52,267 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 7 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:22:52,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 93 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:22:52,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-06 19:22:52,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-12-06 19:22:52,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 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 19:22:52,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-12-06 19:22:52,273 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 62 [2021-12-06 19:22:52,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:22:52,274 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-12-06 19:22:52,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 19:22:52,274 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-12-06 19:22:52,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 19:22:52,276 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:22:52,276 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:22:52,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 19:22:52,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:22:52,478 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:22:52,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:22:52,479 INFO L85 PathProgramCache]: Analyzing trace with hash -50192777, now seen corresponding path program 3 times [2021-12-06 19:22:52,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:22:52,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178760597] [2021-12-06 19:22:52,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:22:52,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:22:52,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:52,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:22:52,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:52,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 19:22:52,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:52,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 19:22:52,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:52,653 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-06 19:22:52,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:22:52,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178760597] [2021-12-06 19:22:52,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178760597] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:22:52,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682960315] [2021-12-06 19:22:52,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:22:52,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:22:52,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:22:52,655 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:22:52,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 19:22:52,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 19:22:52,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:22:52,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 19:22:52,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:22:52,765 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-06 19:22:52,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:22:52,831 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-06 19:22:52,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682960315] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:22:52,831 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:22:52,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2021-12-06 19:22:52,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845563854] [2021-12-06 19:22:52,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:22:52,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:22:52,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:22:52,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:22:52,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:22:52,833 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 19:22:52,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:22:52,855 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2021-12-06 19:22:52,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:22:52,855 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 66 [2021-12-06 19:22:52,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:22:52,856 INFO L225 Difference]: With dead ends: 80 [2021-12-06 19:22:52,856 INFO L226 Difference]: Without dead ends: 53 [2021-12-06 19:22:52,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:22:52,858 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 21 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:22:52,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 122 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:22:52,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-06 19:22:52,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-06 19:22:52,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 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 19:22:52,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2021-12-06 19:22:52,865 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 66 [2021-12-06 19:22:52,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:22:52,865 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2021-12-06 19:22:52,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 19:22:52,866 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2021-12-06 19:22:52,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-06 19:22:52,867 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:22:52,868 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:22:52,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-06 19:22:53,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:22:53,069 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:22:53,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:22:53,071 INFO L85 PathProgramCache]: Analyzing trace with hash -135945016, now seen corresponding path program 4 times [2021-12-06 19:22:53,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:22:53,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283826271] [2021-12-06 19:22:53,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:22:53,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:22:53,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:53,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:22:53,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:53,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 19:22:53,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:53,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 19:22:53,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:53,258 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2021-12-06 19:22:53,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:22:53,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283826271] [2021-12-06 19:22:53,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283826271] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:22:53,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643568397] [2021-12-06 19:22:53,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:22:53,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:22:53,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:22:53,260 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:22:53,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 19:22:53,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:22:53,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:22:53,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 19:22:53,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:22:53,416 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 230 proven. 4 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-12-06 19:22:53,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:22:53,491 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2021-12-06 19:22:53,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643568397] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:22:53,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:22:53,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2021-12-06 19:22:53,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562935163] [2021-12-06 19:22:53,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:22:53,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:22:53,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:22:53,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:22:53,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:22:53,493 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 19:22:53,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:22:53,506 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2021-12-06 19:22:53,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:22:53,506 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 102 [2021-12-06 19:22:53,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:22:53,507 INFO L225 Difference]: With dead ends: 88 [2021-12-06 19:22:53,507 INFO L226 Difference]: Without dead ends: 57 [2021-12-06 19:22:53,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:22:53,508 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 4 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:22:53,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 51 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:22:53,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-06 19:22:53,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-12-06 19:22:53,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 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 19:22:53,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2021-12-06 19:22:53,513 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 102 [2021-12-06 19:22:53,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:22:53,514 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2021-12-06 19:22:53,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 19:22:53,514 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2021-12-06 19:22:53,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-06 19:22:53,515 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:22:53,515 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:22:53,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 19:22:53,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-06 19:22:53,717 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:22:53,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:22:53,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1996885060, now seen corresponding path program 5 times [2021-12-06 19:22:53,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:22:53,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254176041] [2021-12-06 19:22:53,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:22:53,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:22:53,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:53,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:22:54,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:54,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 19:22:54,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:54,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-06 19:22:54,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:54,310 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 13 proven. 379 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-12-06 19:22:54,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:22:54,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254176041] [2021-12-06 19:22:54,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254176041] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:22:54,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489547373] [2021-12-06 19:22:54,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 19:22:54,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:22:54,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:22:54,312 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:22:54,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 19:22:54,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-12-06 19:22:54,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:22:54,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 97 conjunts are in the unsatisfiable core [2021-12-06 19:22:54,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:22:54,673 INFO L354 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2021-12-06 19:22:54,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 17 [2021-12-06 19:22:55,654 INFO L354 Elim1Store]: treesize reduction 289, result has 25.5 percent of original size [2021-12-06 19:22:55,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 101 treesize of output 125 [2021-12-06 19:22:56,686 INFO L354 Elim1Store]: treesize reduction 418, result has 20.1 percent of original size [2021-12-06 19:22:56,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 374 treesize of output 228 [2021-12-06 19:22:57,915 INFO L354 Elim1Store]: treesize reduction 484, result has 21.8 percent of original size [2021-12-06 19:22:57,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 416 treesize of output 263 [2021-12-06 19:22:59,359 INFO L354 Elim1Store]: treesize reduction 618, result has 8.6 percent of original size [2021-12-06 19:22:59,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 452 treesize of output 225 [2021-12-06 19:22:59,576 INFO L354 Elim1Store]: treesize reduction 256, result has 9.5 percent of original size [2021-12-06 19:22:59,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 70 treesize of output 49 [2021-12-06 19:23:05,370 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 274 proven. 201 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-06 19:23:05,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:23:05,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489547373] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:23:05,515 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:23:05,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 45] total 55 [2021-12-06 19:23:05,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099665805] [2021-12-06 19:23:05,516 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:23:05,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-06 19:23:05,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:23:05,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-06 19:23:05,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=2878, Unknown=3, NotChecked=0, Total=3080 [2021-12-06 19:23:05,518 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 55 states, 53 states have (on average 2.150943396226415) internal successors, (114), 52 states have internal predecessors, (114), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 19:23:13,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:23:13,150 INFO L93 Difference]: Finished difference Result 192 states and 238 transitions. [2021-12-06 19:23:13,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-12-06 19:23:13,150 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 53 states have (on average 2.150943396226415) internal successors, (114), 52 states have internal predecessors, (114), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 106 [2021-12-06 19:23:13,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:23:13,154 INFO L225 Difference]: With dead ends: 192 [2021-12-06 19:23:13,154 INFO L226 Difference]: Without dead ends: 145 [2021-12-06 19:23:13,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 88 SyntacticMatches, 3 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3134 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=732, Invalid=9365, Unknown=3, NotChecked=0, Total=10100 [2021-12-06 19:23:13,160 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 35 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 1851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1166 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:23:13,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 487 Invalid, 1851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 673 Invalid, 0 Unknown, 1166 Unchecked, 0.3s Time] [2021-12-06 19:23:13,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-12-06 19:23:13,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 137. [2021-12-06 19:23:13,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 128 states have (on average 1.2109375) internal successors, (155), 129 states have internal predecessors, (155), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-12-06 19:23:13,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 173 transitions. [2021-12-06 19:23:13,179 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 173 transitions. Word has length 106 [2021-12-06 19:23:13,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:23:13,180 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 173 transitions. [2021-12-06 19:23:13,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 53 states have (on average 2.150943396226415) internal successors, (114), 52 states have internal predecessors, (114), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 19:23:13,180 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 173 transitions. [2021-12-06 19:23:13,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-06 19:23:13,183 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:23:13,183 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 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 19:23:13,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 19:23:13,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:23:13,385 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:23:13,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:23:13,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1737382458, now seen corresponding path program 1 times [2021-12-06 19:23:13,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:23:13,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300514698] [2021-12-06 19:23:13,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:23:13,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:23:13,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:23:13,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:23:13,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:23:14,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 19:23:14,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:23:14,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-06 19:23:14,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:23:14,329 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 114 proven. 347 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-06 19:23:14,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:23:14,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300514698] [2021-12-06 19:23:14,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300514698] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:23:14,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844480908] [2021-12-06 19:23:14,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:23:14,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:23:14,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:23:14,330 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:23:14,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 19:23:14,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:23:14,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 90 conjunts are in the unsatisfiable core [2021-12-06 19:23:14,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:23:15,191 INFO L354 Elim1Store]: treesize reduction 334, result has 11.4 percent of original size [2021-12-06 19:23:15,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 85 treesize of output 64 [2021-12-06 19:23:15,883 INFO L354 Elim1Store]: treesize reduction 235, result has 13.3 percent of original size [2021-12-06 19:23:15,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 80 treesize of output 59 [2021-12-06 19:23:16,026 INFO L354 Elim1Store]: treesize reduction 166, result has 17.8 percent of original size [2021-12-06 19:23:16,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 56 [2021-12-06 19:23:16,109 INFO L354 Elim1Store]: treesize reduction 178, result has 11.9 percent of original size [2021-12-06 19:23:16,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 44 [2021-12-06 19:23:16,233 INFO L354 Elim1Store]: treesize reduction 157, result has 8.7 percent of original size [2021-12-06 19:23:16,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 35 [2021-12-06 19:23:16,310 INFO L354 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2021-12-06 19:23:16,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 27 [2021-12-06 19:23:53,224 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 8 proven. 467 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-06 19:23:53,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:23:56,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844480908] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:23:56,970 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:23:56,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 42] total 72 [2021-12-06 19:23:56,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857080260] [2021-12-06 19:23:56,970 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:23:56,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-12-06 19:23:56,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:23:56,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-12-06 19:23:56,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=7800, Unknown=15, NotChecked=0, Total=8190 [2021-12-06 19:23:56,974 INFO L87 Difference]: Start difference. First operand 137 states and 173 transitions. Second operand has 72 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 19:25:53,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:25:53,993 INFO L93 Difference]: Finished difference Result 385 states and 507 transitions. [2021-12-06 19:25:53,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-12-06 19:25:53,993 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 106 [2021-12-06 19:25:53,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:25:53,996 INFO L225 Difference]: With dead ends: 385 [2021-12-06 19:25:53,996 INFO L226 Difference]: Without dead ends: 378 [2021-12-06 19:25:54,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 108 SyntacticMatches, 4 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 6339 ImplicationChecksByTransitivity, 158.4s TimeCoverageRelationStatistics Valid=1054, Invalid=20648, Unknown=54, NotChecked=0, Total=21756 [2021-12-06 19:25:54,003 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 50 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 2600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1564 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:25:54,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 857 Invalid, 2600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1019 Invalid, 0 Unknown, 1564 Unchecked, 0.4s Time] [2021-12-06 19:25:54,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-12-06 19:25:54,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 301. [2021-12-06 19:25:54,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 279 states have (on average 1.200716845878136) internal successors, (335), 283 states have internal predecessors, (335), 12 states have call successors, (12), 4 states have call predecessors, (12), 9 states have return successors, (52), 13 states have call predecessors, (52), 12 states have call successors, (52) [2021-12-06 19:25:54,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 399 transitions. [2021-12-06 19:25:54,042 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 399 transitions. Word has length 106 [2021-12-06 19:25:54,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:25:54,042 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 399 transitions. [2021-12-06 19:25:54,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 19:25:54,043 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 399 transitions. [2021-12-06 19:25:54,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-06 19:25:54,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:25:54,047 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 5, 5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:25:54,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-06 19:25:54,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 19:25:54,249 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:25:54,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:25:54,251 INFO L85 PathProgramCache]: Analyzing trace with hash -2130409468, now seen corresponding path program 2 times [2021-12-06 19:25:54,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:25:54,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757187406] [2021-12-06 19:25:54,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:25:54,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:25:54,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:54,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:25:54,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:55,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 19:25:55,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:55,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-06 19:25:55,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:56,388 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 3 proven. 502 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 19:25:56,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:25:56,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757187406] [2021-12-06 19:25:56,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757187406] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:25:56,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087895816] [2021-12-06 19:25:56,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:25:56,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:25:56,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:25:56,389 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:25:56,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 19:25:56,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:25:56,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:25:56,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 153 conjunts are in the unsatisfiable core [2021-12-06 19:25:56,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:25:56,641 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 19:26:40,897 INFO L354 Elim1Store]: treesize reduction 294, result has 10.6 percent of original size [2021-12-06 19:26:40,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 102 treesize of output 67 [2021-12-06 19:26:42,674 INFO L354 Elim1Store]: treesize reduction 126, result has 18.2 percent of original size [2021-12-06 19:26:42,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 61 [2021-12-06 19:26:42,843 INFO L354 Elim1Store]: treesize reduction 126, result has 18.2 percent of original size [2021-12-06 19:26:42,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 61 [2021-12-06 19:26:43,002 INFO L354 Elim1Store]: treesize reduction 135, result has 12.3 percent of original size [2021-12-06 19:26:43,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 52 [2021-12-06 19:26:43,242 INFO L354 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2021-12-06 19:26:43,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 38 [2021-12-06 19:26:43,372 INFO L354 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2021-12-06 19:26:43,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 38 [2021-12-06 19:27:58,808 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:27:58,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 108 treesize of output 64 [2021-12-06 19:27:59,245 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 1 proven. 516 refuted. 1 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 19:27:59,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:28:33,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087895816] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:28:33,862 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:28:33,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 59] total 115 [2021-12-06 19:28:33,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770607723] [2021-12-06 19:28:33,863 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:28:33,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2021-12-06 19:28:33,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:28:33,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2021-12-06 19:28:33,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=16612, Unknown=77, NotChecked=0, Total=17292 [2021-12-06 19:28:33,869 INFO L87 Difference]: Start difference. First operand 301 states and 399 transitions. Second operand has 115 states, 112 states have (on average 1.6428571428571428) internal successors, (184), 106 states have internal predecessors, (184), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 19:31:11,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:31:11,678 INFO L93 Difference]: Finished difference Result 575 states and 788 transitions. [2021-12-06 19:31:11,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-12-06 19:31:11,679 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 112 states have (on average 1.6428571428571428) internal successors, (184), 106 states have internal predecessors, (184), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 106 [2021-12-06 19:31:11,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:31:11,682 INFO L225 Difference]: With dead ends: 575 [2021-12-06 19:31:11,682 INFO L226 Difference]: Without dead ends: 548 [2021-12-06 19:31:11,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11781 ImplicationChecksByTransitivity, 313.4s TimeCoverageRelationStatistics Valid=1214, Invalid=34544, Unknown=152, NotChecked=0, Total=35910 [2021-12-06 19:31:11,686 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 30 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 1732 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 2604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 850 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:31:11,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 1052 Invalid, 2604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1732 Invalid, 0 Unknown, 850 Unchecked, 1.0s Time] [2021-12-06 19:31:11,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-12-06 19:31:11,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 489. [2021-12-06 19:31:11,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 456 states have (on average 1.2149122807017543) internal successors, (554), 465 states have internal predecessors, (554), 17 states have call successors, (17), 8 states have call predecessors, (17), 15 states have return successors, (102), 15 states have call predecessors, (102), 17 states have call successors, (102) [2021-12-06 19:31:11,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 673 transitions. [2021-12-06 19:31:11,723 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 673 transitions. Word has length 106 [2021-12-06 19:31:11,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:31:11,723 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 673 transitions. [2021-12-06 19:31:11,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 112 states have (on average 1.6428571428571428) internal successors, (184), 106 states have internal predecessors, (184), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 19:31:11,724 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 673 transitions. [2021-12-06 19:31:11,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-06 19:31:11,728 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:31:11,728 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 5, 5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:31:11,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 19:31:11,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:31:11,929 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:31:11,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:31:11,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1546467588, now seen corresponding path program 3 times [2021-12-06 19:31:11,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:31:11,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854688780] [2021-12-06 19:31:11,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:11,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:31:11,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:12,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:31:12,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:12,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 19:31:12,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:12,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-06 19:31:12,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:12,768 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 114 proven. 347 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-06 19:31:12,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:31:12,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854688780] [2021-12-06 19:31:12,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854688780] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:31:12,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640650778] [2021-12-06 19:31:12,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:31:12,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:31:12,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:31:12,770 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:31:12,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 19:31:12,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-06 19:31:12,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:31:13,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-06 19:31:13,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:31:13,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:31:13,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:31:13,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:31:13,875 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 38 treesize of output 36 [2021-12-06 19:31:13,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:31:13,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 27 [2021-12-06 19:31:13,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:31:13,969 INFO L354 Elim1Store]: treesize reduction 48, result has 39.2 percent of original size [2021-12-06 19:31:13,970 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 3 case distinctions, treesize of input 42 treesize of output 50 [2021-12-06 19:31:14,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:31:14,165 INFO L354 Elim1Store]: treesize reduction 48, result has 39.2 percent of original size [2021-12-06 19:31:14,165 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 3 case distinctions, treesize of input 78 treesize of output 74 [2021-12-06 19:31:14,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:31:14,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 19:31:15,625 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 238 proven. 225 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-06 19:31:15,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:31:15,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640650778] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:31:15,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:31:15,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 41] total 65 [2021-12-06 19:31:15,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746449468] [2021-12-06 19:31:15,883 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:31:15,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-06 19:31:15,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:31:15,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-06 19:31:15,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=4078, Unknown=0, NotChecked=0, Total=4290 [2021-12-06 19:31:15,885 INFO L87 Difference]: Start difference. First operand 489 states and 673 transitions. Second operand has 65 states, 64 states have (on average 2.046875) internal successors, (131), 63 states have internal predecessors, (131), 3 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 19:31:42,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:31:42,963 INFO L93 Difference]: Finished difference Result 1019 states and 1457 transitions. [2021-12-06 19:31:42,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2021-12-06 19:31:42,963 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 2.046875) internal successors, (131), 63 states have internal predecessors, (131), 3 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 106 [2021-12-06 19:31:42,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:31:42,972 INFO L225 Difference]: With dead ends: 1019 [2021-12-06 19:31:42,973 INFO L226 Difference]: Without dead ends: 1012 [2021-12-06 19:31:42,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 95 SyntacticMatches, 5 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11166 ImplicationChecksByTransitivity, 28.8s TimeCoverageRelationStatistics Valid=1622, Invalid=30943, Unknown=15, NotChecked=0, Total=32580 [2021-12-06 19:31:42,978 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 75 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 2362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1134 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:31:42,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 579 Invalid, 2362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1183 Invalid, 0 Unknown, 1134 Unchecked, 0.6s Time] [2021-12-06 19:31:42,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2021-12-06 19:31:43,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 895. [2021-12-06 19:31:43,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 847 states have (on average 1.2373081463990554) internal successors, (1048), 861 states have internal predecessors, (1048), 23 states have call successors, (23), 11 states have call predecessors, (23), 24 states have return successors, (219), 22 states have call predecessors, (219), 23 states have call successors, (219) [2021-12-06 19:31:43,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1290 transitions. [2021-12-06 19:31:43,060 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1290 transitions. Word has length 106 [2021-12-06 19:31:43,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:31:43,061 INFO L470 AbstractCegarLoop]: Abstraction has 895 states and 1290 transitions. [2021-12-06 19:31:43,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 2.046875) internal successors, (131), 63 states have internal predecessors, (131), 3 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 19:31:43,061 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1290 transitions. [2021-12-06 19:31:43,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-06 19:31:43,068 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:31:43,069 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 12, 5, 5, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:31:43,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 19:31:43,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:31:43,270 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:31:43,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:31:43,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1153440578, now seen corresponding path program 4 times [2021-12-06 19:31:43,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:31:43,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737904977] [2021-12-06 19:31:43,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:43,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:31:43,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:43,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:31:43,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:43,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 19:31:43,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:43,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-06 19:31:43,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:44,281 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 119 proven. 345 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-06 19:31:44,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:31:44,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737904977] [2021-12-06 19:31:44,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737904977] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:31:44,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379034911] [2021-12-06 19:31:44,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:31:44,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:31:44,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:31:44,283 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:31:44,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69747fa-62b4-427d-b19e-3f99d8d86302/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 19:31:44,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:31:44,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:31:44,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-06 19:31:44,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:31:44,881 INFO L354 Elim1Store]: treesize reduction 72, result has 20.9 percent of original size [2021-12-06 19:31:44,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-12-06 19:31:44,927 INFO L354 Elim1Store]: treesize reduction 72, result has 20.9 percent of original size [2021-12-06 19:31:44,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-12-06 19:31:44,979 INFO L354 Elim1Store]: treesize reduction 150, result has 12.8 percent of original size [2021-12-06 19:31:44,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 41 [2021-12-06 19:31:45,073 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-12-06 19:31:45,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 39 [2021-12-06 19:31:45,123 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-12-06 19:31:45,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 36 [2021-12-06 19:32:28,304 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 107 proven. 411 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 19:32:28,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:32:44,790 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 19:32:44,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 33 treesize of output 1 [2021-12-06 19:32:49,052 INFO L354 Elim1Store]: treesize reduction 52, result has 48.0 percent of original size [2021-12-06 19:32:49,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 56 [2021-12-06 19:32:49,315 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 255 proven. 190 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-06 19:32:49,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379034911] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:32:49,315 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:32:49,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 39, 28] total 85 [2021-12-06 19:32:49,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777432273] [2021-12-06 19:32:49,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:32:49,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-12-06 19:32:49,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:32:49,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-12-06 19:32:49,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=6707, Unknown=24, NotChecked=0, Total=7140 [2021-12-06 19:32:49,317 INFO L87 Difference]: Start difference. First operand 895 states and 1290 transitions. Second operand has 85 states, 85 states have (on average 2.3058823529411763) internal successors, (196), 83 states have internal predecessors, (196), 5 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7)