./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/sum10-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/sum10-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN --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 f341d659968a9193c951bd8eec2bcf2a384f8494a1f57cb579da98ce5ebdb030 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 10:50:30,333 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:50:30,336 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:50:30,381 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:50:30,382 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:50:30,383 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:50:30,385 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:50:30,387 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:50:30,389 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:50:30,390 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:50:30,391 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:50:30,393 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:50:30,393 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:50:30,395 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:50:30,396 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:50:30,397 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:50:30,399 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:50:30,400 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:50:30,402 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:50:30,404 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:50:30,406 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:50:30,413 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:50:30,414 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:50:30,416 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:50:30,420 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:50:30,420 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:50:30,420 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:50:30,422 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:50:30,422 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:50:30,423 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:50:30,424 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:50:30,425 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:50:30,433 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:50:30,435 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:50:30,436 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:50:30,437 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:50:30,438 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:50:30,438 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:50:30,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:50:30,441 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:50:30,442 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:50:30,443 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 10:50:30,494 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:50:30,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:50:30,502 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:50:30,502 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:50:30,503 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:50:30,504 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:50:30,504 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:50:30,505 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:50:30,505 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:50:30,505 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:50:30,507 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:50:30,507 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:50:30,507 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:50:30,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:50:30,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:50:30,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:50:30,508 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:50:30,509 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:50:30,509 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:50:30,509 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:50:30,510 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:50:30,510 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:50:30,510 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:50:30,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:50:30,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:50:30,511 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:50:30,511 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:50:30,512 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:50:30,512 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:50:30,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:50:30,512 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:50:30,513 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:50:30,513 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:50:30,513 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_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f341d659968a9193c951bd8eec2bcf2a384f8494a1f57cb579da98ce5ebdb030 [2022-11-20 10:50:30,831 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:50:30,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:50:30,881 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:50:30,883 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:50:30,884 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:50:30,885 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/reducercommutativity/sum10-1.i [2022-11-20 10:50:34,179 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:50:34,385 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:50:34,386 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/sv-benchmarks/c/reducercommutativity/sum10-1.i [2022-11-20 10:50:34,393 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/data/7d28485bd/81f491794c334a06ac0f3543475cd3cb/FLAG14ed3518f [2022-11-20 10:50:34,424 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/data/7d28485bd/81f491794c334a06ac0f3543475cd3cb [2022-11-20 10:50:34,426 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:50:34,428 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:50:34,433 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:50:34,433 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:50:34,437 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:50:34,438 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:50:34" (1/1) ... [2022-11-20 10:50:34,439 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69f69308 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:34, skipping insertion in model container [2022-11-20 10:50:34,439 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:50:34" (1/1) ... [2022-11-20 10:50:34,449 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:50:34,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:50:34,631 WARN L237 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_e8023bf7-6cc6-412e-be11-86e297bd0c21/sv-benchmarks/c/reducercommutativity/sum10-1.i[1277,1290] [2022-11-20 10:50:34,637 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:50:34,648 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:50:34,673 WARN L237 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_e8023bf7-6cc6-412e-be11-86e297bd0c21/sv-benchmarks/c/reducercommutativity/sum10-1.i[1277,1290] [2022-11-20 10:50:34,674 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:50:34,689 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:50:34,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:34 WrapperNode [2022-11-20 10:50:34,690 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:50:34,691 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:50:34,692 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:50:34,692 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:50:34,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:34" (1/1) ... [2022-11-20 10:50:34,709 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:34" (1/1) ... [2022-11-20 10:50:34,732 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-11-20 10:50:34,732 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:50:34,733 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:50:34,733 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:50:34,733 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:50:34,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:34" (1/1) ... [2022-11-20 10:50:34,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:34" (1/1) ... [2022-11-20 10:50:34,747 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:34" (1/1) ... [2022-11-20 10:50:34,748 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:34" (1/1) ... [2022-11-20 10:50:34,755 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:34" (1/1) ... [2022-11-20 10:50:34,760 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:34" (1/1) ... [2022-11-20 10:50:34,762 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:34" (1/1) ... [2022-11-20 10:50:34,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:34" (1/1) ... [2022-11-20 10:50:34,765 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:50:34,766 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:50:34,767 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:50:34,767 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:50:34,768 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:34" (1/1) ... [2022-11-20 10:50:34,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:50:34,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:34,829 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:50:34,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:50:34,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:50:34,877 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2022-11-20 10:50:34,877 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2022-11-20 10:50:34,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:50:34,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 10:50:34,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 10:50:34,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:50:34,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:50:34,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 10:50:34,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 10:50:34,969 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:50:34,972 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:50:35,152 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:50:35,160 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:50:35,160 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 10:50:35,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:50:35 BoogieIcfgContainer [2022-11-20 10:50:35,163 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:50:35,166 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:50:35,167 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:50:35,171 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:50:35,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:50:34" (1/3) ... [2022-11-20 10:50:35,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f3cc643 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:50:35, skipping insertion in model container [2022-11-20 10:50:35,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:34" (2/3) ... [2022-11-20 10:50:35,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f3cc643 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:50:35, skipping insertion in model container [2022-11-20 10:50:35,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:50:35" (3/3) ... [2022-11-20 10:50:35,175 INFO L112 eAbstractionObserver]: Analyzing ICFG sum10-1.i [2022-11-20 10:50:35,197 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:50:35,197 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 10:50:35,250 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:50:35,259 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@e37c1c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:50:35,260 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 10:50:35,267 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 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) [2022-11-20 10:50:35,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 10:50:35,276 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:35,277 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:35,278 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:35,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:35,285 INFO L85 PathProgramCache]: Analyzing trace with hash -141219973, now seen corresponding path program 1 times [2022-11-20 10:50:35,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:35,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243005993] [2022-11-20 10:50:35,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:35,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:35,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:35,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:50:35,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:35,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 10:50:35,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:35,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 10:50:35,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:35,879 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 10:50:35,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:35,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243005993] [2022-11-20 10:50:35,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243005993] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:35,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178435778] [2022-11-20 10:50:35,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:35,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:35,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:35,886 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:35,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:50:35,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:35,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 10:50:36,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:36,069 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 10:50:36,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:50:36,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178435778] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:50:36,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:50:36,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-20 10:50:36,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707609520] [2022-11-20 10:50:36,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:50:36,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:50:36,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:36,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:50:36,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:50:36,134 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 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 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) [2022-11-20 10:50:36,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:36,176 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2022-11-20 10:50:36,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:50:36,179 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 [2022-11-20 10:50:36,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:36,186 INFO L225 Difference]: With dead ends: 50 [2022-11-20 10:50:36,186 INFO L226 Difference]: Without dead ends: 24 [2022-11-20 10:50:36,190 INFO L412 NwaCegarLoop]: 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 [2022-11-20 10:50:36,194 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 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 [2022-11-20 10:50:36,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:50:36,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-20 10:50:36,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-11-20 10:50:36,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 10:50:36,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-11-20 10:50:36,240 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2022-11-20 10:50:36,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:36,240 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-11-20 10:50:36,240 INFO L496 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) [2022-11-20 10:50:36,240 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-11-20 10:50:36,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 10:50:36,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:36,242 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:36,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 10:50:36,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-20 10:50:36,448 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:36,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:36,450 INFO L85 PathProgramCache]: Analyzing trace with hash -618478211, now seen corresponding path program 1 times [2022-11-20 10:50:36,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:36,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738933176] [2022-11-20 10:50:36,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:36,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:36,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:36,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-20 10:50:36,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:36,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 10:50:36,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:36,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-20 10:50:36,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:36,660 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 10:50:36,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:36,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738933176] [2022-11-20 10:50:36,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738933176] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:36,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635634995] [2022-11-20 10:50:36,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:36,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:36,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:36,672 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:36,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:50:36,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:36,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 10:50:36,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:36,843 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 10:50:36,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:50:36,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635634995] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:50:36,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:50:36,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-20 10:50:36,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430844357] [2022-11-20 10:50:36,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:50:36,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:50:36,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:36,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:50:36,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:50:36,847 INFO L87 Difference]: Start difference. First operand 23 states and 27 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) [2022-11-20 10:50:36,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:36,876 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-11-20 10:50:36,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:50:36,877 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 [2022-11-20 10:50:36,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:36,878 INFO L225 Difference]: With dead ends: 42 [2022-11-20 10:50:36,878 INFO L226 Difference]: Without dead ends: 25 [2022-11-20 10:50:36,878 INFO L412 NwaCegarLoop]: 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 [2022-11-20 10:50:36,880 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 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 [2022-11-20 10:50:36,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:50:36,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-20 10:50:36,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-11-20 10:50:36,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 10:50:36,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-20 10:50:36,887 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2022-11-20 10:50:36,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:36,887 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-20 10:50:36,888 INFO L496 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) [2022-11-20 10:50:36,888 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-20 10:50:36,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-20 10:50:36,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:36,889 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:36,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:37,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:37,098 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:37,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:37,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1511029509, now seen corresponding path program 1 times [2022-11-20 10:50:37,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:37,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744432803] [2022-11-20 10:50:37,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:37,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:37,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:37,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-20 10:50:37,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:37,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 10:50:37,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:37,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-20 10:50:37,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:37,326 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 10:50:37,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:37,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744432803] [2022-11-20 10:50:37,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744432803] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:37,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547734774] [2022-11-20 10:50:37,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:37,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:37,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:37,329 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:37,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:50:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:37,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 10:50:37,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 10:50:37,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:50:37,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547734774] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:50:37,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:50:37,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-20 10:50:37,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539529841] [2022-11-20 10:50:37,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:50:37,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:50:37,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:37,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:50:37,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:50:37,487 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2022-11-20 10:50:37,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:37,504 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-11-20 10:50:37,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:50:37,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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 36 [2022-11-20 10:50:37,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:37,507 INFO L225 Difference]: With dead ends: 39 [2022-11-20 10:50:37,507 INFO L226 Difference]: Without dead ends: 26 [2022-11-20 10:50:37,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:50:37,510 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 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 [2022-11-20 10:50:37,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:50:37,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-20 10:50:37,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-11-20 10:50:37,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 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) [2022-11-20 10:50:37,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-11-20 10:50:37,522 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 36 [2022-11-20 10:50:37,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:37,524 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-11-20 10:50:37,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2022-11-20 10:50:37,524 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-11-20 10:50:37,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-20 10:50:37,525 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:37,526 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 10:50:37,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:37,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:37,727 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:37,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:37,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1553738215, now seen corresponding path program 1 times [2022-11-20 10:50:37,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:37,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416091460] [2022-11-20 10:50:37,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:37,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:37,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:37,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-20 10:50:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:37,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 10:50:37,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:37,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 10:50:37,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:37,867 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 10:50:37,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:37,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416091460] [2022-11-20 10:50:37,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416091460] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:37,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898767829] [2022-11-20 10:50:37,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:37,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:37,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:37,874 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:37,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:50:37,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:37,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 10:50:37,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:37,997 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-20 10:50:37,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:38,042 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-20 10:50:38,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898767829] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:38,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:38,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-11-20 10:50:38,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037524668] [2022-11-20 10:50:38,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:38,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 10:50:38,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:38,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 10:50:38,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-20 10:50:38,046 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 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) [2022-11-20 10:50:38,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:38,095 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2022-11-20 10:50:38,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:50:38,096 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 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 38 [2022-11-20 10:50:38,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:38,097 INFO L225 Difference]: With dead ends: 54 [2022-11-20 10:50:38,106 INFO L226 Difference]: Without dead ends: 34 [2022-11-20 10:50:38,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-20 10:50:38,108 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 102 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 [2022-11-20 10:50:38,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 102 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:50:38,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-20 10:50:38,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-11-20 10:50:38,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 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) [2022-11-20 10:50:38,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-11-20 10:50:38,115 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 38 [2022-11-20 10:50:38,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:38,127 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-11-20 10:50:38,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 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) [2022-11-20 10:50:38,128 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-11-20 10:50:38,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-20 10:50:38,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:38,129 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 10:50:38,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:38,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:38,354 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:38,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:38,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1124150243, now seen corresponding path program 2 times [2022-11-20 10:50:38,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:38,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709001556] [2022-11-20 10:50:38,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:38,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:38,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:38,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-20 10:50:38,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:38,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-20 10:50:38,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:38,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-20 10:50:38,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:38,550 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-20 10:50:38,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:38,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709001556] [2022-11-20 10:50:38,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709001556] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:38,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903779506] [2022-11-20 10:50:38,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:50:38,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:38,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:38,553 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:38,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 10:50:38,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:50:38,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:50:38,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 10:50:38,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:38,758 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-20 10:50:38,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:38,886 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-20 10:50:38,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903779506] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:38,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:38,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-11-20 10:50:38,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641121403] [2022-11-20 10:50:38,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:38,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:50:38,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:38,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:50:38,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:50:38,895 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 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) [2022-11-20 10:50:38,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:38,997 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2022-11-20 10:50:38,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 10:50:38,998 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 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 50 [2022-11-20 10:50:38,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:38,999 INFO L225 Difference]: With dead ends: 70 [2022-11-20 10:50:38,999 INFO L226 Difference]: Without dead ends: 48 [2022-11-20 10:50:39,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:50:39,001 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 17 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:39,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 80 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:50:39,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-20 10:50:39,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-11-20 10:50:39,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 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) [2022-11-20 10:50:39,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2022-11-20 10:50:39,010 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 50 [2022-11-20 10:50:39,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:39,010 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2022-11-20 10:50:39,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 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) [2022-11-20 10:50:39,011 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-11-20 10:50:39,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-20 10:50:39,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:39,013 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:39,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:39,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:39,214 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:39,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:39,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1238744391, now seen corresponding path program 3 times [2022-11-20 10:50:39,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:39,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914608662] [2022-11-20 10:50:39,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:39,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:39,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:39,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 10:50:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:39,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-20 10:50:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:39,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-20 10:50:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:39,414 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-11-20 10:50:39,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:39,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914608662] [2022-11-20 10:50:39,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914608662] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:39,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711555429] [2022-11-20 10:50:39,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:50:39,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:39,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:39,422 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:39,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 10:50:39,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 10:50:39,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:50:39,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 10:50:39,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:39,552 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-11-20 10:50:39,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:39,605 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-11-20 10:50:39,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711555429] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:39,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:39,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-20 10:50:39,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824691996] [2022-11-20 10:50:39,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:39,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 10:50:39,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:39,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 10:50:39,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:50:39,610 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 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) [2022-11-20 10:50:39,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:39,661 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2022-11-20 10:50:39,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:50:39,662 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 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 64 [2022-11-20 10:50:39,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:39,667 INFO L225 Difference]: With dead ends: 78 [2022-11-20 10:50:39,668 INFO L226 Difference]: Without dead ends: 55 [2022-11-20 10:50:39,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:50:39,671 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:39,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 68 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:50:39,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-20 10:50:39,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-11-20 10:50:39,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 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) [2022-11-20 10:50:39,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2022-11-20 10:50:39,687 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 64 [2022-11-20 10:50:39,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:39,688 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2022-11-20 10:50:39,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 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) [2022-11-20 10:50:39,688 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2022-11-20 10:50:39,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-20 10:50:39,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:39,690 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:39,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:39,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:39,896 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:39,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:39,896 INFO L85 PathProgramCache]: Analyzing trace with hash 756543039, now seen corresponding path program 4 times [2022-11-20 10:50:39,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:39,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113096402] [2022-11-20 10:50:39,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:39,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:39,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:40,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 10:50:40,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:40,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-20 10:50:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:40,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-20 10:50:40,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:40,175 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2022-11-20 10:50:40,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:40,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113096402] [2022-11-20 10:50:40,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113096402] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:40,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925309664] [2022-11-20 10:50:40,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:50:40,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:40,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:40,177 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:40,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 10:50:40,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:50:40,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:50:40,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 10:50:40,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:40,378 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2022-11-20 10:50:40,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:40,503 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2022-11-20 10:50:40,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925309664] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:40,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:40,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2022-11-20 10:50:40,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688661808] [2022-11-20 10:50:40,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:40,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:50:40,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:40,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:50:40,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:50:40,505 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 10:50:40,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:40,552 INFO L93 Difference]: Finished difference Result 94 states and 107 transitions. [2022-11-20 10:50:40,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 10:50:40,553 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 88 [2022-11-20 10:50:40,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:40,554 INFO L225 Difference]: With dead ends: 94 [2022-11-20 10:50:40,554 INFO L226 Difference]: Without dead ends: 63 [2022-11-20 10:50:40,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 175 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:50:40,555 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:40,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 90 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:50:40,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-20 10:50:40,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-11-20 10:50:40,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 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) [2022-11-20 10:50:40,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2022-11-20 10:50:40,563 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 88 [2022-11-20 10:50:40,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:40,564 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2022-11-20 10:50:40,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 10:50:40,564 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2022-11-20 10:50:40,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-20 10:50:40,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:40,566 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:40,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:40,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 10:50:40,772 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:40,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:40,773 INFO L85 PathProgramCache]: Analyzing trace with hash 953202487, now seen corresponding path program 5 times [2022-11-20 10:50:40,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:40,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682404309] [2022-11-20 10:50:40,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:40,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:40,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:40,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 10:50:40,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:40,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-20 10:50:40,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:40,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-20 10:50:40,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:40,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2022-11-20 10:50:40,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:40,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682404309] [2022-11-20 10:50:40,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682404309] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:40,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499699913] [2022-11-20 10:50:40,961 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:50:40,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:40,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:40,963 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:40,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 10:50:41,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2022-11-20 10:50:41,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:50:41,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 10:50:41,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:41,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 450 proven. 4 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2022-11-20 10:50:41,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:41,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2022-11-20 10:50:41,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499699913] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:41,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:41,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-20 10:50:41,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504957909] [2022-11-20 10:50:41,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:41,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 10:50:41,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:41,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 10:50:41,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-20 10:50:41,556 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 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) [2022-11-20 10:50:41,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:41,594 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2022-11-20 10:50:41,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:50:41,595 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 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 112 [2022-11-20 10:50:41,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:41,596 INFO L225 Difference]: With dead ends: 102 [2022-11-20 10:50:41,596 INFO L226 Difference]: Without dead ends: 71 [2022-11-20 10:50:41,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-20 10:50:41,598 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:41,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 66 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:50:41,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-20 10:50:41,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-11-20 10:50:41,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 states have internal predecessors, (69), 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) [2022-11-20 10:50:41,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2022-11-20 10:50:41,608 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 112 [2022-11-20 10:50:41,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:41,609 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2022-11-20 10:50:41,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 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) [2022-11-20 10:50:41,609 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2022-11-20 10:50:41,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-20 10:50:41,611 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:41,611 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 10, 10, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:41,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:41,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 10:50:41,819 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:41,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:41,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1215823185, now seen corresponding path program 6 times [2022-11-20 10:50:41,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:41,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268033353] [2022-11-20 10:50:41,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:41,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:41,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:42,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 10:50:42,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:42,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-20 10:50:42,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:42,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-20 10:50:42,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:42,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2022-11-20 10:50:42,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:42,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268033353] [2022-11-20 10:50:42,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268033353] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:42,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497793059] [2022-11-20 10:50:42,065 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:50:42,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:42,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:42,067 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:42,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 10:50:42,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-11-20 10:50:42,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:50:42,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 10:50:42,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:42,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 450 proven. 36 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2022-11-20 10:50:42,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:42,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2022-11-20 10:50:42,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497793059] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:42,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:42,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2022-11-20 10:50:42,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553398450] [2022-11-20 10:50:42,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:42,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:50:42,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:42,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:50:42,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:50:42,719 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 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) [2022-11-20 10:50:42,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:42,760 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2022-11-20 10:50:42,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:50:42,760 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 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 120 [2022-11-20 10:50:42,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:42,765 INFO L225 Difference]: With dead ends: 108 [2022-11-20 10:50:42,765 INFO L226 Difference]: Without dead ends: 77 [2022-11-20 10:50:42,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 238 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:50:42,768 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:42,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 108 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:50:42,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-20 10:50:42,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-11-20 10:50:42,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 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) [2022-11-20 10:50:42,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2022-11-20 10:50:42,794 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 120 [2022-11-20 10:50:42,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:42,795 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2022-11-20 10:50:42,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 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) [2022-11-20 10:50:42,796 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2022-11-20 10:50:42,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-20 10:50:42,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:42,803 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 10, 10, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:42,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:43,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-20 10:50:43,010 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:43,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:43,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1982748809, now seen corresponding path program 7 times [2022-11-20 10:50:43,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:43,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144510650] [2022-11-20 10:50:43,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:43,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:44,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:15,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 10:51:15,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:18,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-20 10:51:18,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:20,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-11-20 10:51:20,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:24,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1125 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-20 10:51:24,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:24,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144510650] [2022-11-20 10:51:24,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144510650] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:24,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034063415] [2022-11-20 10:51:24,706 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:51:24,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:24,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:24,715 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:24,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8023bf7-6cc6-412e-be11-86e297bd0c21/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 10:51:25,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:25,485 WARN L261 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 265 conjunts are in the unsatisfiable core [2022-11-20 10:51:25,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:25,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 10:51:27,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:27,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:27,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:27,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:27,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:27,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:27,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:27,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:27,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:27,964 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:51:27,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 464 treesize of output 178 [2022-11-20 10:51:31,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:31,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:31,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:31,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:31,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:31,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:31,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:31,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:31,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:31,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:51:31,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:31,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:31,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:31,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:31,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:31,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:31,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:31,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:31,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:51:31,076 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-20 10:51:31,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 45 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 844 treesize of output 307 [2022-11-20 10:51:32,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:32,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:32,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:32,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:32,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:32,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:32,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:32,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:32,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:51:32,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:32,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:32,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:32,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:32,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:32,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:32,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:51:32,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:32,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:32,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:32,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:32,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:32,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:32,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:32,348 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-20 10:51:32,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 45 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 810 treesize of output 307 [2022-11-20 10:51:33,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:33,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:33,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:33,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:33,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:51:33,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:33,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:33,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:33,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:33,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:33,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:51:33,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:33,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:33,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:33,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:33,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:33,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:33,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:33,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:33,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:33,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:33,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:33,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:33,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:33,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:33,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:33,580 INFO L321 Elim1Store]: treesize reduction 4, result has 42.9 percent of original size [2022-11-20 10:51:33,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 45 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 794 treesize of output 310 [2022-11-20 10:51:34,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:51:34,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:34,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:34,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:34,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:34,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:34,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:34,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:34,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:34,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:34,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:34,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:34,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:34,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:34,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:34,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:34,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:34,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:34,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:34,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:34,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:34,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:51:34,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:34,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:34,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:34,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:34,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:34,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:34,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:34,909 INFO L321 Elim1Store]: treesize reduction 4, result has 42.9 percent of original size [2022-11-20 10:51:34,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 45 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 797 treesize of output 313 [2022-11-20 10:51:36,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:36,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:36,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:36,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:36,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:51:36,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:36,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:36,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:36,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:36,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:36,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:51:36,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:36,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:36,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:36,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:36,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:36,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:36,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:36,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:36,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:36,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:36,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:36,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:36,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:36,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:36,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:36,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:36,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:36,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:36,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:36,286 INFO L321 Elim1Store]: treesize reduction 4, result has 42.9 percent of original size [2022-11-20 10:51:36,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 45 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 827 treesize of output 316 [2022-11-20 10:51:37,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:37,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:37,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:37,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:51:37,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:37,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:37,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:37,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:37,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:37,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:37,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:37,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:37,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:37,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:37,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:37,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:37,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:37,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:51:37,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:37,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:37,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:37,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:37,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:37,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:37,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:37,651 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-20 10:51:37,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 45 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 792 treesize of output 307 [2022-11-20 10:51:38,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:38,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:38,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:38,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:38,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:38,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:38,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:38,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:51:38,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:38,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:38,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:38,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:38,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:51:38,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:38,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:38,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:38,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:38,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:38,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:38,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:38,964 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-20 10:51:38,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 45 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 792 treesize of output 307 [2022-11-20 10:51:40,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:40,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:51:40,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:40,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:40,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:40,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:40,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:40,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:40,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:40,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:40,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:40,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:40,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:40,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:40,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:40,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:51:40,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:40,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:40,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:40,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:40,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:40,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:40,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:40,369 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-20 10:51:40,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 45 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 792 treesize of output 307 [2022-11-20 10:51:41,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:41,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:41,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:41,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:41,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:41,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:41,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:41,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:41,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:41,619 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:51:41,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 787 treesize of output 284 [2022-11-20 10:51:42,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:42,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:42,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:42,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:42,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:42,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:42,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:42,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:42,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:42,596 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:51:42,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 112 treesize of output 106 [2022-11-20 10:51:45,765 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:51:45,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 633 treesize of output 193 [2022-11-20 10:51:46,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-20 10:51:46,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:52:15,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 4 proven. 981 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-11-20 10:52:15,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034063415] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:52:15,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:52:15,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 58, 48] total 144 [2022-11-20 10:52:15,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832059196] [2022-11-20 10:52:15,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:52:15,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2022-11-20 10:52:15,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:52:15,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2022-11-20 10:52:15,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=19969, Unknown=0, NotChecked=0, Total=20592 [2022-11-20 10:52:15,767 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 144 states, 140 states have (on average 1.2285714285714286) internal successors, (172), 136 states have internal predecessors, (172), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-20 10:52:40,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:52:42,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:52:44,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:52:54,536 WARN L233 SmtUtils]: Spent 5.60s on a formula simplification. DAG size of input: 268 DAG size of output: 88 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:54:28,468 WARN L233 SmtUtils]: Spent 1.46m on a formula simplification. DAG size of input: 459 DAG size of output: 84 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:54:48,417 WARN L233 SmtUtils]: Spent 7.40s on a formula simplification. DAG size of input: 306 DAG size of output: 88 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:00:06,923 WARN L233 SmtUtils]: Spent 5.12m on a formula simplification. DAG size of input: 234 DAG size of output: 218 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:00:11,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:00:14,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:00:16,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:00:18,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:00:20,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:00:23,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:00:25,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:00:28,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:00:31,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:03:40,499 WARN L233 SmtUtils]: Spent 3.07m on a formula simplification. DAG size of input: 205 DAG size of output: 192 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)