./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/down.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_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/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_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-invgen/down.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/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_b850c841-60f5-4910-9ffc-b7cfc09aea5f/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 d487f6cb836d5c7294168f7ececc6a4515780c0860389f79570a9c0e20e7bcc0 --- 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 10:49:38,311 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:49:38,313 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:49:38,347 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:49:38,347 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:49:38,349 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:49:38,350 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:49:38,356 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:49:38,359 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:49:38,365 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:49:38,366 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:49:38,369 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:49:38,369 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:49:38,372 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:49:38,375 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:49:38,377 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:49:38,379 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:49:38,380 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:49:38,383 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:49:38,390 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:49:38,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:49:38,394 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:49:38,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:49:38,397 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:49:38,408 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:49:38,408 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:49:38,409 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:49:38,412 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:49:38,413 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:49:38,414 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:49:38,414 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:49:38,415 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:49:38,417 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:49:38,417 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:49:38,419 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:49:38,419 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:49:38,420 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:49:38,420 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:49:38,421 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:49:38,422 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:49:38,423 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:49:38,424 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 10:49:38,461 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:49:38,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:49:38,462 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:49:38,462 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:49:38,463 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:49:38,463 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:49:38,464 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:49:38,464 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:49:38,464 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:49:38,465 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:49:38,466 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:49:38,466 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:49:38,466 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:49:38,466 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:49:38,466 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:49:38,467 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:49:38,467 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:49:38,467 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:49:38,467 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:49:38,467 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:49:38,468 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:49:38,468 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:49:38,468 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:49:38,468 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:49:38,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:49:38,469 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:49:38,469 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:49:38,469 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:49:38,470 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:49:38,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:49:38,470 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:49:38,470 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:49:38,471 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:49:38,471 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_b850c841-60f5-4910-9ffc-b7cfc09aea5f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d487f6cb836d5c7294168f7ececc6a4515780c0860389f79570a9c0e20e7bcc0 [2022-11-20 10:49:38,773 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:49:38,809 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:49:38,812 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:49:38,813 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:49:38,813 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:49:38,814 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/loop-invgen/down.i [2022-11-20 10:49:41,945 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:49:42,183 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:49:42,183 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/sv-benchmarks/c/loop-invgen/down.i [2022-11-20 10:49:42,190 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/data/2cb585115/8c4b417601c14e73982e4c18db38ee2c/FLAG6f03d89ba [2022-11-20 10:49:42,211 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/data/2cb585115/8c4b417601c14e73982e4c18db38ee2c [2022-11-20 10:49:42,214 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:49:42,215 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:49:42,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:49:42,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:49:42,223 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:49:42,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:49:42" (1/1) ... [2022-11-20 10:49:42,225 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1898d348 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:42, skipping insertion in model container [2022-11-20 10:49:42,225 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:49:42" (1/1) ... [2022-11-20 10:49:42,233 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:49:42,250 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:49:42,453 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_b850c841-60f5-4910-9ffc-b7cfc09aea5f/sv-benchmarks/c/loop-invgen/down.i[893,906] [2022-11-20 10:49:42,472 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:49:42,485 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:49:42,500 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_b850c841-60f5-4910-9ffc-b7cfc09aea5f/sv-benchmarks/c/loop-invgen/down.i[893,906] [2022-11-20 10:49:42,508 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:49:42,524 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:49:42,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:42 WrapperNode [2022-11-20 10:49:42,525 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:49:42,526 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:49:42,527 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:49:42,527 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:49:42,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:42" (1/1) ... [2022-11-20 10:49:42,543 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:42" (1/1) ... [2022-11-20 10:49:42,562 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 45 [2022-11-20 10:49:42,563 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:49:42,563 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:49:42,564 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:49:42,564 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:49:42,571 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:42" (1/1) ... [2022-11-20 10:49:42,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:42" (1/1) ... [2022-11-20 10:49:42,572 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:42" (1/1) ... [2022-11-20 10:49:42,572 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:42" (1/1) ... [2022-11-20 10:49:42,575 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:42" (1/1) ... [2022-11-20 10:49:42,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:42" (1/1) ... [2022-11-20 10:49:42,580 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:42" (1/1) ... [2022-11-20 10:49:42,581 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:42" (1/1) ... [2022-11-20 10:49:42,582 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:49:42,583 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:49:42,583 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:49:42,583 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:49:42,584 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:42" (1/1) ... [2022-11-20 10:49:42,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:49:42,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:49:42,627 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:49:42,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:49:42,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:49:42,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:49:42,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:49:42,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:49:42,739 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:49:42,741 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:49:42,891 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:49:42,897 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:49:42,897 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 10:49:42,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:49:42 BoogieIcfgContainer [2022-11-20 10:49:42,899 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:49:42,902 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:49:42,902 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:49:42,906 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:49:42,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:49:42" (1/3) ... [2022-11-20 10:49:42,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34fa6165 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:49:42, skipping insertion in model container [2022-11-20 10:49:42,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:42" (2/3) ... [2022-11-20 10:49:42,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34fa6165 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:49:42, skipping insertion in model container [2022-11-20 10:49:42,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:49:42" (3/3) ... [2022-11-20 10:49:42,926 INFO L112 eAbstractionObserver]: Analyzing ICFG down.i [2022-11-20 10:49:42,951 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:49:42,952 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 10:49:43,032 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:49:43,041 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;@52d9bf8b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:49:43,042 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 10:49:43,046 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:43,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 10:49:43,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:49:43,054 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:49:43,055 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:49:43,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:49:43,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1808851121, now seen corresponding path program 1 times [2022-11-20 10:49:43,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:49:43,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915003037] [2022-11-20 10:49:43,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:49:43,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:49:43,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:49:43,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:43,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:49:43,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915003037] [2022-11-20 10:49:43,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915003037] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:49:43,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:49:43,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 10:49:43,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141242086] [2022-11-20 10:49:43,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:49:43,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:49:43,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:49:43,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:49:43,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:49:43,508 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:43,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:49:43,625 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2022-11-20 10:49:43,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:49:43,628 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 10:49:43,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:49:43,636 INFO L225 Difference]: With dead ends: 30 [2022-11-20 10:49:43,636 INFO L226 Difference]: Without dead ends: 10 [2022-11-20 10:49:43,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:49:43,642 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:49:43,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 35 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:49:43,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-20 10:49:43,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-20 10:49:43,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:43,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-11-20 10:49:43,672 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2022-11-20 10:49:43,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:49:43,673 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-11-20 10:49:43,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:43,673 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-11-20 10:49:43,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 10:49:43,674 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:49:43,674 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:49:43,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:49:43,675 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:49:43,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:49:43,676 INFO L85 PathProgramCache]: Analyzing trace with hash 291256044, now seen corresponding path program 1 times [2022-11-20 10:49:43,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:49:43,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292726322] [2022-11-20 10:49:43,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:49:43,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:49:43,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:49:43,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:43,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:49:43,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292726322] [2022-11-20 10:49:43,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292726322] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:49:43,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816096268] [2022-11-20 10:49:43,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:49:43,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:49:43,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:49:43,878 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:49:43,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:49:43,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:49:43,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 10:49:43,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:49:44,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:44,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:49:44,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816096268] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:49:44,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:49:44,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-20 10:49:44,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239193716] [2022-11-20 10:49:44,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:49:44,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:49:44,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:49:44,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:49:44,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:49:44,009 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:44,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:49:44,072 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-11-20 10:49:44,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:49:44,073 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 10:49:44,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:49:44,074 INFO L225 Difference]: With dead ends: 20 [2022-11-20 10:49:44,074 INFO L226 Difference]: Without dead ends: 18 [2022-11-20 10:49:44,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-20 10:49:44,078 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 12 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:49:44,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 18 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:49:44,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-20 10:49:44,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2022-11-20 10:49:44,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:44,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2022-11-20 10:49:44,092 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2022-11-20 10:49:44,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:49:44,093 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2022-11-20 10:49:44,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:44,093 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2022-11-20 10:49:44,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:49:44,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:49:44,099 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:49:44,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:49:44,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:49:44,312 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:49:44,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:49:44,313 INFO L85 PathProgramCache]: Analyzing trace with hash 979689165, now seen corresponding path program 1 times [2022-11-20 10:49:44,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:49:44,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389640941] [2022-11-20 10:49:44,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:49:44,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:49:44,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:49:44,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:44,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:49:44,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389640941] [2022-11-20 10:49:44,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389640941] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:49:44,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866254377] [2022-11-20 10:49:44,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:49:44,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:49:44,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:49:44,503 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:49:44,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:49:44,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:49:44,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 10:49:44,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:49:44,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:44,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:49:44,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:44,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866254377] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:49:44,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:49:44,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-11-20 10:49:44,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098733306] [2022-11-20 10:49:44,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:49:44,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 10:49:44,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:49:44,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 10:49:44,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:49:44,688 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:44,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:49:44,759 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2022-11-20 10:49:44,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:49:44,760 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:49:44,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:49:44,761 INFO L225 Difference]: With dead ends: 23 [2022-11-20 10:49:44,761 INFO L226 Difference]: Without dead ends: 13 [2022-11-20 10:49:44,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:49:44,764 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:49:44,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 27 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:49:44,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-20 10:49:44,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-20 10:49:44,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:44,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-11-20 10:49:44,773 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2022-11-20 10:49:44,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:49:44,773 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-11-20 10:49:44,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:44,774 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-11-20 10:49:44,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:49:44,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:49:44,774 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:49:44,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-20 10:49:44,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:49:44,983 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:49:44,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:49:44,984 INFO L85 PathProgramCache]: Analyzing trace with hash -510353528, now seen corresponding path program 2 times [2022-11-20 10:49:44,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:49:44,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009533682] [2022-11-20 10:49:44,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:49:44,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:49:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:49:45,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:45,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:49:45,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009533682] [2022-11-20 10:49:45,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009533682] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:49:45,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843860140] [2022-11-20 10:49:45,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:49:45,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:49:45,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:49:45,195 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:49:45,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:49:45,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:49:45,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:49:45,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 10:49:45,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:49:45,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:45,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:49:45,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:45,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843860140] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:49:45,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:49:45,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-11-20 10:49:45,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050250455] [2022-11-20 10:49:45,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:49:45,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 10:49:45,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:49:45,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 10:49:45,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:49:45,404 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:45,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:49:45,495 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2022-11-20 10:49:45,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:49:45,496 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 10:49:45,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:49:45,498 INFO L225 Difference]: With dead ends: 24 [2022-11-20 10:49:45,498 INFO L226 Difference]: Without dead ends: 22 [2022-11-20 10:49:45,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:49:45,501 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 20 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:49:45,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 24 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:49:45,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-20 10:49:45,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 16. [2022-11-20 10:49:45,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:45,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-11-20 10:49:45,511 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2022-11-20 10:49:45,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:49:45,511 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-11-20 10:49:45,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:45,512 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-11-20 10:49:45,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:49:45,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:49:45,519 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-20 10:49:45,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:49:45,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:49:45,725 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:49:45,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:49:45,726 INFO L85 PathProgramCache]: Analyzing trace with hash 247095473, now seen corresponding path program 3 times [2022-11-20 10:49:45,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:49:45,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699762903] [2022-11-20 10:49:45,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:49:45,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:49:45,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:49:45,874 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:45,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:49:45,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699762903] [2022-11-20 10:49:45,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699762903] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:49:45,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17115880] [2022-11-20 10:49:45,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:49:45,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:49:45,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:49:45,876 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:49:45,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:49:45,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 10:49:45,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:49:45,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 10:49:45,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:49:45,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:45,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:49:46,023 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:46,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17115880] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:49:46,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:49:46,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2022-11-20 10:49:46,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266820657] [2022-11-20 10:49:46,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:49:46,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:49:46,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:49:46,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:49:46,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:49:46,026 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:46,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:49:46,110 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2022-11-20 10:49:46,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:49:46,110 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 10:49:46,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:49:46,111 INFO L225 Difference]: With dead ends: 30 [2022-11-20 10:49:46,111 INFO L226 Difference]: Without dead ends: 17 [2022-11-20 10:49:46,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:49:46,112 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:49:46,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 37 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:49:46,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-20 10:49:46,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-20 10:49:46,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:46,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-11-20 10:49:46,116 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2022-11-20 10:49:46,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:49:46,116 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-11-20 10:49:46,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:46,117 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-11-20 10:49:46,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 10:49:46,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:49:46,117 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-20 10:49:46,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 10:49:46,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:49:46,322 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:49:46,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:49:46,323 INFO L85 PathProgramCache]: Analyzing trace with hash 576015340, now seen corresponding path program 4 times [2022-11-20 10:49:46,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:49:46,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966353772] [2022-11-20 10:49:46,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:49:46,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:49:46,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:49:46,437 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:46,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:49:46,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966353772] [2022-11-20 10:49:46,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966353772] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:49:46,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77713722] [2022-11-20 10:49:46,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:49:46,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:49:46,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:49:46,439 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:49:46,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 10:49:46,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:49:46,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:49:46,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 10:49:46,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:49:46,541 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:46,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:49:46,599 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:46,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77713722] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:49:46,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:49:46,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-11-20 10:49:46,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249086900] [2022-11-20 10:49:46,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:49:46,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 10:49:46,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:49:46,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 10:49:46,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-20 10:49:46,602 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:46,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:49:46,697 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2022-11-20 10:49:46,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 10:49:46,698 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 10:49:46,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:49:46,700 INFO L225 Difference]: With dead ends: 28 [2022-11-20 10:49:46,700 INFO L226 Difference]: Without dead ends: 26 [2022-11-20 10:49:46,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:49:46,704 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 30 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:49:46,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 30 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:49:46,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-20 10:49:46,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2022-11-20 10:49:46,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:46,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-11-20 10:49:46,716 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2022-11-20 10:49:46,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:49:46,716 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-11-20 10:49:46,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:46,717 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-11-20 10:49:46,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 10:49:46,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:49:46,718 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-20 10:49:46,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 10:49:46,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:49:46,923 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:49:46,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:49:46,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1683466701, now seen corresponding path program 5 times [2022-11-20 10:49:46,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:49:46,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655653994] [2022-11-20 10:49:46,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:49:46,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:49:46,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:49:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:47,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:49:47,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655653994] [2022-11-20 10:49:47,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655653994] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:49:47,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104175321] [2022-11-20 10:49:47,052 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:49:47,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:49:47,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:49:47,054 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:49:47,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 10:49:47,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-20 10:49:47,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:49:47,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 10:49:47,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:49:47,165 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:47,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:49:47,263 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:47,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104175321] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:49:47,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:49:47,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 12 [2022-11-20 10:49:47,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745673758] [2022-11-20 10:49:47,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:49:47,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:49:47,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:49:47,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:49:47,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:49:47,266 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:47,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:49:47,382 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2022-11-20 10:49:47,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:49:47,384 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-20 10:49:47,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:49:47,385 INFO L225 Difference]: With dead ends: 37 [2022-11-20 10:49:47,385 INFO L226 Difference]: Without dead ends: 21 [2022-11-20 10:49:47,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:49:47,386 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:49:47,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 37 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:49:47,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-20 10:49:47,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-20 10:49:47,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:47,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-11-20 10:49:47,394 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2022-11-20 10:49:47,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:49:47,395 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-11-20 10:49:47,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:47,395 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-11-20 10:49:47,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 10:49:47,396 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:49:47,396 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-20 10:49:47,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 10:49:47,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:49:47,602 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:49:47,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:49:47,602 INFO L85 PathProgramCache]: Analyzing trace with hash 230981512, now seen corresponding path program 6 times [2022-11-20 10:49:47,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:49:47,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111150831] [2022-11-20 10:49:47,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:49:47,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:49:47,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:49:47,711 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:47,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:49:47,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111150831] [2022-11-20 10:49:47,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111150831] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:49:47,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019592908] [2022-11-20 10:49:47,712 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:49:47,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:49:47,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:49:47,713 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:49:47,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 10:49:47,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-20 10:49:47,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:49:47,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 10:49:47,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:49:47,826 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:47,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:49:47,925 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:47,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019592908] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:49:47,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:49:47,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2022-11-20 10:49:47,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063049804] [2022-11-20 10:49:47,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:49:47,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:49:47,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:49:47,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:49:47,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:49:47,929 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:48,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:49:48,038 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2022-11-20 10:49:48,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 10:49:48,039 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-20 10:49:48,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:49:48,040 INFO L225 Difference]: With dead ends: 32 [2022-11-20 10:49:48,040 INFO L226 Difference]: Without dead ends: 30 [2022-11-20 10:49:48,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 8 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:49:48,042 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 34 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:49:48,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 32 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:49:48,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-20 10:49:48,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2022-11-20 10:49:48,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:48,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-11-20 10:49:48,052 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2022-11-20 10:49:48,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:49:48,052 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-11-20 10:49:48,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:48,053 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-11-20 10:49:48,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 10:49:48,054 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:49:48,054 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-20 10:49:48,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 10:49:48,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 10:49:48,261 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:49:48,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:49:48,262 INFO L85 PathProgramCache]: Analyzing trace with hash 637436081, now seen corresponding path program 7 times [2022-11-20 10:49:48,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:49:48,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812366225] [2022-11-20 10:49:48,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:49:48,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:49:48,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:49:48,427 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:48,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:49:48,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812366225] [2022-11-20 10:49:48,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812366225] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:49:48,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609526423] [2022-11-20 10:49:48,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:49:48,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:49:48,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:49:48,429 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:49:48,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 10:49:48,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:49:48,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 10:49:48,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:49:48,537 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:48,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:49:48,640 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:48,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609526423] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:49:48,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:49:48,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 14 [2022-11-20 10:49:48,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755393727] [2022-11-20 10:49:48,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:49:48,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:49:48,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:49:48,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:49:48,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:49:48,642 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:48,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:49:48,771 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2022-11-20 10:49:48,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 10:49:48,771 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-20 10:49:48,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:49:48,773 INFO L225 Difference]: With dead ends: 44 [2022-11-20 10:49:48,774 INFO L226 Difference]: Without dead ends: 25 [2022-11-20 10:49:48,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2022-11-20 10:49:48,776 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:49:48,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 53 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:49:48,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-20 10:49:48,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-20 10:49:48,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:48,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-11-20 10:49:48,784 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2022-11-20 10:49:48,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:49:48,784 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-11-20 10:49:48,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:48,785 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-11-20 10:49:48,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 10:49:48,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:49:48,786 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-20 10:49:48,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 10:49:48,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:49:48,995 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:49:48,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:49:48,996 INFO L85 PathProgramCache]: Analyzing trace with hash -45874964, now seen corresponding path program 8 times [2022-11-20 10:49:48,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:49:48,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345285663] [2022-11-20 10:49:48,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:49:48,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:49:49,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:49:49,170 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:49,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:49:49,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345285663] [2022-11-20 10:49:49,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345285663] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:49:49,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372445537] [2022-11-20 10:49:49,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:49:49,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:49:49,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:49:49,186 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:49:49,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 10:49:49,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:49:49,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:49:49,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:49:49,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:49:49,312 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:49,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:49:49,404 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:49,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372445537] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:49:49,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:49:49,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2022-11-20 10:49:49,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721308848] [2022-11-20 10:49:49,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:49:49,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 10:49:49,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:49:49,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 10:49:49,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:49:49,408 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:49,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:49:49,520 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2022-11-20 10:49:49,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 10:49:49,520 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-20 10:49:49,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:49:49,522 INFO L225 Difference]: With dead ends: 36 [2022-11-20 10:49:49,523 INFO L226 Difference]: Without dead ends: 34 [2022-11-20 10:49:49,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 40 SyntacticMatches, 10 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2022-11-20 10:49:49,524 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 34 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:49:49,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 28 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:49:49,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-20 10:49:49,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2022-11-20 10:49:49,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:49,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2022-11-20 10:49:49,533 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2022-11-20 10:49:49,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:49:49,533 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2022-11-20 10:49:49,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:49,534 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2022-11-20 10:49:49,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 10:49:49,534 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:49:49,535 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-11-20 10:49:49,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 10:49:49,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 10:49:49,740 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:49:49,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:49:49,741 INFO L85 PathProgramCache]: Analyzing trace with hash -856632115, now seen corresponding path program 9 times [2022-11-20 10:49:49,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:49:49,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505422966] [2022-11-20 10:49:49,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:49:49,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:49:49,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:49:49,939 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:49,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:49:49,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505422966] [2022-11-20 10:49:49,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505422966] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:49:49,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949409573] [2022-11-20 10:49:49,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:49:49,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:49:49,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:49:49,942 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:49:49,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 10:49:50,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 10:49:50,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:49:50,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 10:49:50,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:49:50,073 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:50,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:49:50,203 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:50,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949409573] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:49:50,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:49:50,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 16 [2022-11-20 10:49:50,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202536900] [2022-11-20 10:49:50,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:49:50,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 10:49:50,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:49:50,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 10:49:50,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:49:50,206 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:50,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:49:50,339 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2022-11-20 10:49:50,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 10:49:50,339 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-20 10:49:50,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:49:50,340 INFO L225 Difference]: With dead ends: 51 [2022-11-20 10:49:50,340 INFO L226 Difference]: Without dead ends: 29 [2022-11-20 10:49:50,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 40 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2022-11-20 10:49:50,341 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 9 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:49:50,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 48 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:49:50,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-20 10:49:50,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-20 10:49:50,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:50,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-11-20 10:49:50,348 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 27 [2022-11-20 10:49:50,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:49:50,348 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-11-20 10:49:50,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:50,349 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-11-20 10:49:50,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 10:49:50,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:49:50,350 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2022-11-20 10:49:50,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 10:49:50,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 10:49:50,555 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:49:50,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:49:50,555 INFO L85 PathProgramCache]: Analyzing trace with hash -2001354872, now seen corresponding path program 10 times [2022-11-20 10:49:50,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:49:50,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596790137] [2022-11-20 10:49:50,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:49:50,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:49:50,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:49:50,697 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:50,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:49:50,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596790137] [2022-11-20 10:49:50,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596790137] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:49:50,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490898462] [2022-11-20 10:49:50,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:49:50,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:49:50,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:49:50,699 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:49:50,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 10:49:50,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:49:50,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:49:50,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:49:50,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:49:50,833 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:50,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:49:50,944 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:50,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490898462] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:49:50,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:49:50,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2022-11-20 10:49:50,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663001046] [2022-11-20 10:49:50,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:49:50,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:49:50,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:49:50,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:49:50,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:49:50,948 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:51,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:49:51,080 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2022-11-20 10:49:51,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 10:49:51,080 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-20 10:49:51,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:49:51,082 INFO L225 Difference]: With dead ends: 40 [2022-11-20 10:49:51,082 INFO L226 Difference]: Without dead ends: 38 [2022-11-20 10:49:51,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 12 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2022-11-20 10:49:51,084 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 34 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:49:51,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 35 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:49:51,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-20 10:49:51,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2022-11-20 10:49:51,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:51,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2022-11-20 10:49:51,099 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 28 [2022-11-20 10:49:51,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:49:51,100 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2022-11-20 10:49:51,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:51,100 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2022-11-20 10:49:51,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 10:49:51,107 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:49:51,107 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2022-11-20 10:49:51,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 10:49:51,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:49:51,313 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:49:51,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:49:51,313 INFO L85 PathProgramCache]: Analyzing trace with hash 377831601, now seen corresponding path program 11 times [2022-11-20 10:49:51,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:49:51,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57375264] [2022-11-20 10:49:51,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:49:51,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:49:51,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:49:51,566 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:51,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:49:51,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57375264] [2022-11-20 10:49:51,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57375264] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:49:51,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480373383] [2022-11-20 10:49:51,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:49:51,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:49:51,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:49:51,569 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:49:51,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 10:49:51,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-11-20 10:49:51,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:49:51,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:49:51,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:49:51,707 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:51,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:49:51,866 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:51,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480373383] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:49:51,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:49:51,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 18 [2022-11-20 10:49:51,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947464847] [2022-11-20 10:49:51,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:49:51,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 10:49:51,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:49:51,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 10:49:51,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-11-20 10:49:51,868 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:52,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:49:52,020 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2022-11-20 10:49:52,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 10:49:52,020 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-20 10:49:52,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:49:52,021 INFO L225 Difference]: With dead ends: 58 [2022-11-20 10:49:52,021 INFO L226 Difference]: Without dead ends: 33 [2022-11-20 10:49:52,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 46 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2022-11-20 10:49:52,022 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:49:52,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 57 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:49:52,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-20 10:49:52,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-20 10:49:52,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:52,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-11-20 10:49:52,029 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 31 [2022-11-20 10:49:52,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:49:52,030 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-11-20 10:49:52,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:52,030 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-11-20 10:49:52,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-20 10:49:52,031 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:49:52,031 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2022-11-20 10:49:52,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 10:49:52,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 10:49:52,236 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:49:52,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:49:52,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1007703532, now seen corresponding path program 12 times [2022-11-20 10:49:52,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:49:52,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392657794] [2022-11-20 10:49:52,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:49:52,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:49:52,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:49:52,468 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 21 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:52,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:49:52,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392657794] [2022-11-20 10:49:52,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392657794] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:49:52,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303717091] [2022-11-20 10:49:52,469 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:49:52,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:49:52,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:49:52,485 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:49:52,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 10:49:52,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-20 10:49:52,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:49:52,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:49:52,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:49:52,637 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:52,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:49:52,764 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:52,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303717091] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:49:52,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:49:52,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2022-11-20 10:49:52,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729720022] [2022-11-20 10:49:52,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:49:52,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:49:52,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:49:52,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:49:52,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:49:52,766 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:52,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:49:52,906 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2022-11-20 10:49:52,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 10:49:52,907 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-20 10:49:52,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:49:52,907 INFO L225 Difference]: With dead ends: 44 [2022-11-20 10:49:52,907 INFO L226 Difference]: Without dead ends: 42 [2022-11-20 10:49:52,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 54 SyntacticMatches, 14 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2022-11-20 10:49:52,908 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 54 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:49:52,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 32 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:49:52,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-20 10:49:52,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2022-11-20 10:49:52,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:52,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-11-20 10:49:52,915 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 32 [2022-11-20 10:49:52,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:49:52,916 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-11-20 10:49:52,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:52,916 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-11-20 10:49:52,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-20 10:49:52,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:49:52,917 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2022-11-20 10:49:52,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 10:49:53,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:49:53,123 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:49:53,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:49:53,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1320656947, now seen corresponding path program 13 times [2022-11-20 10:49:53,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:49:53,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113319753] [2022-11-20 10:49:53,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:49:53,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:49:53,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:49:53,429 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:53,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:49:53,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113319753] [2022-11-20 10:49:53,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113319753] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:49:53,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285096318] [2022-11-20 10:49:53,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:49:53,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:49:53,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:49:53,431 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:49:53,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 10:49:53,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:49:53,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:49:53,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:49:53,569 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:53,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:49:53,772 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:53,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285096318] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:49:53,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:49:53,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 20 [2022-11-20 10:49:53,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674021136] [2022-11-20 10:49:53,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:49:53,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 10:49:53,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:49:53,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 10:49:53,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-11-20 10:49:53,774 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:53,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:49:53,979 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2022-11-20 10:49:53,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 10:49:53,979 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-20 10:49:53,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:49:53,979 INFO L225 Difference]: With dead ends: 65 [2022-11-20 10:49:53,979 INFO L226 Difference]: Without dead ends: 37 [2022-11-20 10:49:53,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 52 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2022-11-20 10:49:53,981 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:49:53,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 65 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:49:53,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-20 10:49:53,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-20 10:49:53,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:53,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-11-20 10:49:53,988 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 35 [2022-11-20 10:49:53,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:49:53,989 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-11-20 10:49:53,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:53,989 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-11-20 10:49:53,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-20 10:49:53,990 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:49:53,990 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2022-11-20 10:49:54,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 10:49:54,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 10:49:54,199 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:49:54,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:49:54,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1149263752, now seen corresponding path program 14 times [2022-11-20 10:49:54,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:49:54,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492308997] [2022-11-20 10:49:54,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:49:54,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:49:54,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:49:54,443 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 28 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:54,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:49:54,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492308997] [2022-11-20 10:49:54,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492308997] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:49:54,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807457961] [2022-11-20 10:49:54,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:49:54,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:49:54,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:49:54,446 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:49:54,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 10:49:54,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:49:54,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:49:54,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 10:49:54,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:49:54,590 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:54,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:49:54,733 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:54,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807457961] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:49:54,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:49:54,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 14 [2022-11-20 10:49:54,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091292671] [2022-11-20 10:49:54,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:49:54,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:49:54,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:49:54,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:49:54,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:49:54,737 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:54,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:49:54,898 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2022-11-20 10:49:54,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 10:49:54,899 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-20 10:49:54,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:49:54,899 INFO L225 Difference]: With dead ends: 48 [2022-11-20 10:49:54,899 INFO L226 Difference]: Without dead ends: 46 [2022-11-20 10:49:54,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 61 SyntacticMatches, 16 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2022-11-20 10:49:54,901 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 78 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:49:54,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 22 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:49:54,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-20 10:49:54,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2022-11-20 10:49:54,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:54,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2022-11-20 10:49:54,929 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 36 [2022-11-20 10:49:54,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:49:54,929 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2022-11-20 10:49:54,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:54,929 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2022-11-20 10:49:54,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 10:49:54,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:49:54,933 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2022-11-20 10:49:54,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 10:49:55,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 10:49:55,135 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:49:55,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:49:55,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1758027599, now seen corresponding path program 15 times [2022-11-20 10:49:55,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:49:55,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127441771] [2022-11-20 10:49:55,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:49:55,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:49:55,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:49:55,417 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:55,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:49:55,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127441771] [2022-11-20 10:49:55,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127441771] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:49:55,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958941596] [2022-11-20 10:49:55,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:49:55,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:49:55,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:49:55,423 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:49:55,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 10:49:55,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-20 10:49:55,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:49:55,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:49:55,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:49:55,561 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:55,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:49:55,782 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:55,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958941596] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:49:55,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:49:55,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 22 [2022-11-20 10:49:55,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995545016] [2022-11-20 10:49:55,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:49:55,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 10:49:55,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:49:55,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 10:49:55,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-11-20 10:49:55,785 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:56,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:49:56,021 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2022-11-20 10:49:56,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 10:49:56,022 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-20 10:49:56,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:49:56,022 INFO L225 Difference]: With dead ends: 72 [2022-11-20 10:49:56,022 INFO L226 Difference]: Without dead ends: 41 [2022-11-20 10:49:56,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 58 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=252, Invalid=740, Unknown=0, NotChecked=0, Total=992 [2022-11-20 10:49:56,023 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 9 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:49:56,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 79 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:49:56,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-20 10:49:56,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-11-20 10:49:56,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:56,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2022-11-20 10:49:56,030 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 39 [2022-11-20 10:49:56,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:49:56,030 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2022-11-20 10:49:56,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:56,032 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2022-11-20 10:49:56,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-20 10:49:56,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:49:56,033 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1] [2022-11-20 10:49:56,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 10:49:56,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 10:49:56,239 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:49:56,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:49:56,240 INFO L85 PathProgramCache]: Analyzing trace with hash -895333652, now seen corresponding path program 16 times [2022-11-20 10:49:56,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:49:56,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15141624] [2022-11-20 10:49:56,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:49:56,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:49:56,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:49:56,468 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 36 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:56,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:49:56,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15141624] [2022-11-20 10:49:56,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15141624] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:49:56,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795885877] [2022-11-20 10:49:56,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:49:56,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:49:56,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:49:56,470 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:49:56,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 10:49:56,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:49:56,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:49:56,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 10:49:56,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:49:56,635 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:56,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:49:56,820 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:56,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795885877] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:49:56,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:49:56,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2022-11-20 10:49:56,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971919444] [2022-11-20 10:49:56,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:49:56,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 10:49:56,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:49:56,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 10:49:56,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-11-20 10:49:56,823 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:57,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:49:57,008 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2022-11-20 10:49:57,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 10:49:57,009 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-20 10:49:57,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:49:57,009 INFO L225 Difference]: With dead ends: 52 [2022-11-20 10:49:57,009 INFO L226 Difference]: Without dead ends: 50 [2022-11-20 10:49:57,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 68 SyntacticMatches, 18 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=422, Unknown=0, NotChecked=0, Total=650 [2022-11-20 10:49:57,011 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 44 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:49:57,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 37 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:49:57,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-20 10:49:57,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2022-11-20 10:49:57,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:57,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2022-11-20 10:49:57,018 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 40 [2022-11-20 10:49:57,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:49:57,019 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2022-11-20 10:49:57,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:57,019 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2022-11-20 10:49:57,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 10:49:57,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:49:57,020 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2022-11-20 10:49:57,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 10:49:57,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 10:49:57,225 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:49:57,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:49:57,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1133098291, now seen corresponding path program 17 times [2022-11-20 10:49:57,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:49:57,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250775411] [2022-11-20 10:49:57,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:49:57,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:49:57,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:49:57,592 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:57,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:49:57,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250775411] [2022-11-20 10:49:57,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250775411] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:49:57,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365473506] [2022-11-20 10:49:57,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:49:57,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:49:57,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:49:57,594 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:49:57,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 10:49:57,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-11-20 10:49:57,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:49:57,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 10:49:57,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:49:57,749 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:57,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:49:58,018 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:58,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365473506] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:49:58,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:49:58,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 24 [2022-11-20 10:49:58,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457681891] [2022-11-20 10:49:58,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:49:58,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 10:49:58,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:49:58,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 10:49:58,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2022-11-20 10:49:58,021 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:58,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:49:58,260 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2022-11-20 10:49:58,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 10:49:58,260 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-20 10:49:58,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:49:58,260 INFO L225 Difference]: With dead ends: 79 [2022-11-20 10:49:58,260 INFO L226 Difference]: Without dead ends: 45 [2022-11-20 10:49:58,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 64 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=299, Invalid=891, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 10:49:58,262 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:49:58,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 75 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:49:58,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-20 10:49:58,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-11-20 10:49:58,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:58,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-11-20 10:49:58,270 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 43 [2022-11-20 10:49:58,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:49:58,270 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-11-20 10:49:58,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:58,271 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-11-20 10:49:58,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 10:49:58,271 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:49:58,271 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2022-11-20 10:49:58,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 10:49:58,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:49:58,476 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:49:58,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:49:58,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1589878904, now seen corresponding path program 18 times [2022-11-20 10:49:58,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:49:58,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287260831] [2022-11-20 10:49:58,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:49:58,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:49:58,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:49:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 45 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:58,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:49:58,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287260831] [2022-11-20 10:49:58,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287260831] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:49:58,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549065226] [2022-11-20 10:49:58,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:49:58,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:49:58,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:49:58,782 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:49:58,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 10:49:58,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-11-20 10:49:58,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:49:58,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 10:49:58,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:49:58,950 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:58,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:49:59,154 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:59,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549065226] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:49:59,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:49:59,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 16 [2022-11-20 10:49:59,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664255644] [2022-11-20 10:49:59,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:49:59,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 10:49:59,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:49:59,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 10:49:59,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:49:59,155 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:59,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:49:59,351 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2022-11-20 10:49:59,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 10:49:59,352 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-20 10:49:59,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:49:59,352 INFO L225 Difference]: With dead ends: 56 [2022-11-20 10:49:59,352 INFO L226 Difference]: Without dead ends: 54 [2022-11-20 10:49:59,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 75 SyntacticMatches, 20 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2022-11-20 10:49:59,353 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 76 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:49:59,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 30 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:49:59,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-20 10:49:59,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2022-11-20 10:49:59,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:59,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2022-11-20 10:49:59,361 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 44 [2022-11-20 10:49:59,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:49:59,362 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2022-11-20 10:49:59,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:59,362 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2022-11-20 10:49:59,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-20 10:49:59,363 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:49:59,363 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2022-11-20 10:49:59,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 10:49:59,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:49:59,569 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:49:59,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:49:59,569 INFO L85 PathProgramCache]: Analyzing trace with hash 821731505, now seen corresponding path program 19 times [2022-11-20 10:49:59,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:49:59,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132040215] [2022-11-20 10:49:59,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:49:59,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:49:59,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:49:59,939 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:59,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:49:59,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132040215] [2022-11-20 10:49:59,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132040215] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:49:59,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369712983] [2022-11-20 10:49:59,939 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:49:59,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:49:59,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:49:59,943 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:49:59,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 10:50:00,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:00,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 10:50:00,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:00,116 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:00,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:00,416 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:00,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369712983] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:00,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:00,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 26 [2022-11-20 10:50:00,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667949705] [2022-11-20 10:50:00,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:00,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 10:50:00,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:00,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 10:50:00,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2022-11-20 10:50:00,418 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:00,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:00,700 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2022-11-20 10:50:00,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 10:50:00,700 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-11-20 10:50:00,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:00,700 INFO L225 Difference]: With dead ends: 86 [2022-11-20 10:50:00,701 INFO L226 Difference]: Without dead ends: 49 [2022-11-20 10:50:00,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 70 SyntacticMatches, 23 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=350, Invalid=1056, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 10:50:00,702 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 9 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:00,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 92 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:50:00,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-20 10:50:00,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-20 10:50:00,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:00,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-11-20 10:50:00,711 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 47 [2022-11-20 10:50:00,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:00,712 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-11-20 10:50:00,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:00,712 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-11-20 10:50:00,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-20 10:50:00,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:00,713 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:00,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:00,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:00,918 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:00,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:00,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1726078956, now seen corresponding path program 20 times [2022-11-20 10:50:00,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:00,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647823779] [2022-11-20 10:50:00,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:00,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:00,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:01,189 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 55 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:01,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:01,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647823779] [2022-11-20 10:50:01,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647823779] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:01,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793944969] [2022-11-20 10:50:01,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:50:01,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:01,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:01,195 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:01,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-20 10:50:01,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:50:01,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:50:01,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 10:50:01,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:01,367 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:01,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:01,623 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:01,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793944969] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:01,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:01,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 17 [2022-11-20 10:50:01,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106079268] [2022-11-20 10:50:01,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:01,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 10:50:01,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:01,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 10:50:01,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:50:01,625 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:01,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:01,850 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2022-11-20 10:50:01,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-20 10:50:01,851 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-20 10:50:01,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:01,851 INFO L225 Difference]: With dead ends: 60 [2022-11-20 10:50:01,851 INFO L226 Difference]: Without dead ends: 58 [2022-11-20 10:50:01,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 82 SyntacticMatches, 22 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=307, Invalid=563, Unknown=0, NotChecked=0, Total=870 [2022-11-20 10:50:01,853 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 80 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:01,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 23 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:50:01,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-20 10:50:01,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2022-11-20 10:50:01,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:01,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2022-11-20 10:50:01,862 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 48 [2022-11-20 10:50:01,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:01,863 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2022-11-20 10:50:01,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:01,863 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2022-11-20 10:50:01,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 10:50:01,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:01,864 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:01,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:02,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:02,069 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:02,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:02,070 INFO L85 PathProgramCache]: Analyzing trace with hash -2020436531, now seen corresponding path program 21 times [2022-11-20 10:50:02,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:02,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863507283] [2022-11-20 10:50:02,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:02,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:02,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:02,498 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:02,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:02,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863507283] [2022-11-20 10:50:02,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863507283] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:02,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065107198] [2022-11-20 10:50:02,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:50:02,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:02,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:02,500 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:02,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 10:50:02,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-11-20 10:50:02,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:50:02,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 10:50:02,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:02,683 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:02,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:03,037 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:03,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065107198] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:03,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:03,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 28 [2022-11-20 10:50:03,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633232200] [2022-11-20 10:50:03,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:03,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 10:50:03,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:03,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 10:50:03,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2022-11-20 10:50:03,039 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:03,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:03,356 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2022-11-20 10:50:03,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 10:50:03,356 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-11-20 10:50:03,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:03,357 INFO L225 Difference]: With dead ends: 93 [2022-11-20 10:50:03,357 INFO L226 Difference]: Without dead ends: 53 [2022-11-20 10:50:03,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 76 SyntacticMatches, 25 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=405, Invalid=1235, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 10:50:03,358 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 9 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:03,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 97 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:50:03,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-20 10:50:03,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-11-20 10:50:03,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:03,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2022-11-20 10:50:03,366 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 51 [2022-11-20 10:50:03,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:03,367 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2022-11-20 10:50:03,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:03,367 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2022-11-20 10:50:03,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-20 10:50:03,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:03,367 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:03,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:03,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-20 10:50:03,568 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:03,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:03,569 INFO L85 PathProgramCache]: Analyzing trace with hash -318652536, now seen corresponding path program 22 times [2022-11-20 10:50:03,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:03,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501273541] [2022-11-20 10:50:03,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:03,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:03,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:03,864 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 66 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:03,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:03,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501273541] [2022-11-20 10:50:03,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501273541] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:03,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964682242] [2022-11-20 10:50:03,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:50:03,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:03,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:03,866 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:03,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-20 10:50:03,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:50:03,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:50:03,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 10:50:03,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:04,062 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:04,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:04,338 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:04,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964682242] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:04,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:04,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 18 [2022-11-20 10:50:04,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085037569] [2022-11-20 10:50:04,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:04,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 10:50:04,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:04,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 10:50:04,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2022-11-20 10:50:04,340 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:04,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:04,574 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2022-11-20 10:50:04,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-20 10:50:04,575 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-20 10:50:04,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:04,575 INFO L225 Difference]: With dead ends: 64 [2022-11-20 10:50:04,575 INFO L226 Difference]: Without dead ends: 62 [2022-11-20 10:50:04,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 89 SyntacticMatches, 24 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=641, Unknown=0, NotChecked=0, Total=992 [2022-11-20 10:50:04,576 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 106 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:04,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 34 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:50:04,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-20 10:50:04,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2022-11-20 10:50:04,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:04,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2022-11-20 10:50:04,588 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 52 [2022-11-20 10:50:04,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:04,588 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2022-11-20 10:50:04,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:04,588 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2022-11-20 10:50:04,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-20 10:50:04,589 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:04,589 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:04,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:04,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-20 10:50:04,795 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:04,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:04,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1095155535, now seen corresponding path program 23 times [2022-11-20 10:50:04,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:04,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202885237] [2022-11-20 10:50:04,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:04,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:04,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:05,288 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:05,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:05,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202885237] [2022-11-20 10:50:05,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202885237] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:05,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972490643] [2022-11-20 10:50:05,289 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:50:05,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:05,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:05,291 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:05,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-20 10:50:05,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-11-20 10:50:05,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:50:05,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 10:50:05,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:05,495 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:05,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:05,922 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:05,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972490643] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:05,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:05,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 30 [2022-11-20 10:50:05,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622409653] [2022-11-20 10:50:05,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:05,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-20 10:50:05,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:05,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-20 10:50:05,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2022-11-20 10:50:05,925 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:06,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:06,304 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2022-11-20 10:50:06,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-20 10:50:06,304 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-11-20 10:50:06,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:06,305 INFO L225 Difference]: With dead ends: 100 [2022-11-20 10:50:06,305 INFO L226 Difference]: Without dead ends: 57 [2022-11-20 10:50:06,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 82 SyntacticMatches, 27 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=464, Invalid=1428, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 10:50:06,306 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 9 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:06,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 123 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:50:06,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-20 10:50:06,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-11-20 10:50:06,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:06,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-11-20 10:50:06,324 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 55 [2022-11-20 10:50:06,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:06,325 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-11-20 10:50:06,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:06,326 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-11-20 10:50:06,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-20 10:50:06,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:06,326 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:06,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:06,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-20 10:50:06,531 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:06,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:06,532 INFO L85 PathProgramCache]: Analyzing trace with hash 548869356, now seen corresponding path program 24 times [2022-11-20 10:50:06,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:06,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548225468] [2022-11-20 10:50:06,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:06,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:06,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:06,887 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 78 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:06,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:06,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548225468] [2022-11-20 10:50:06,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548225468] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:06,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713314794] [2022-11-20 10:50:06,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:50:06,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:06,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:06,888 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:06,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-20 10:50:06,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-11-20 10:50:06,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:50:06,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 10:50:06,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:07,086 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:07,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:07,357 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:07,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713314794] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:07,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:07,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 19 [2022-11-20 10:50:07,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342866557] [2022-11-20 10:50:07,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:07,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 10:50:07,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:07,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 10:50:07,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2022-11-20 10:50:07,359 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:07,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:07,616 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2022-11-20 10:50:07,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-20 10:50:07,616 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-11-20 10:50:07,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:07,617 INFO L225 Difference]: With dead ends: 68 [2022-11-20 10:50:07,617 INFO L226 Difference]: Without dead ends: 66 [2022-11-20 10:50:07,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 96 SyntacticMatches, 26 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=398, Invalid=724, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 10:50:07,618 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 114 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:07,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 31 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:50:07,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-20 10:50:07,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2022-11-20 10:50:07,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:07,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2022-11-20 10:50:07,631 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 56 [2022-11-20 10:50:07,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:07,631 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2022-11-20 10:50:07,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:07,631 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2022-11-20 10:50:07,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-20 10:50:07,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:07,637 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:07,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:07,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-20 10:50:07,843 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:07,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:07,844 INFO L85 PathProgramCache]: Analyzing trace with hash 431309005, now seen corresponding path program 25 times [2022-11-20 10:50:07,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:07,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078929429] [2022-11-20 10:50:07,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:07,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:07,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:08,436 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:08,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:08,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078929429] [2022-11-20 10:50:08,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078929429] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:08,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609930510] [2022-11-20 10:50:08,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:50:08,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:08,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:08,438 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:08,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-20 10:50:08,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:08,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 10:50:08,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:08,620 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:08,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:09,049 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:09,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609930510] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:09,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:09,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 32 [2022-11-20 10:50:09,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535663124] [2022-11-20 10:50:09,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:09,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 10:50:09,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:09,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 10:50:09,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2022-11-20 10:50:09,052 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:09,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:09,485 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2022-11-20 10:50:09,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-20 10:50:09,485 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-11-20 10:50:09,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:09,486 INFO L225 Difference]: With dead ends: 107 [2022-11-20 10:50:09,486 INFO L226 Difference]: Without dead ends: 61 [2022-11-20 10:50:09,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 88 SyntacticMatches, 29 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=527, Invalid=1635, Unknown=0, NotChecked=0, Total=2162 [2022-11-20 10:50:09,488 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:09,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 147 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:50:09,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-20 10:50:09,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-11-20 10:50:09,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:09,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-11-20 10:50:09,503 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 59 [2022-11-20 10:50:09,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:09,504 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-11-20 10:50:09,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:09,504 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-11-20 10:50:09,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-20 10:50:09,505 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:09,505 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:09,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:09,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:09,711 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:09,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:09,711 INFO L85 PathProgramCache]: Analyzing trace with hash -471302264, now seen corresponding path program 26 times [2022-11-20 10:50:09,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:09,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154502815] [2022-11-20 10:50:09,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:09,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:10,118 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 91 proven. 274 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:10,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:10,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154502815] [2022-11-20 10:50:10,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154502815] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:10,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685375675] [2022-11-20 10:50:10,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:50:10,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:10,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:10,123 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:10,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-20 10:50:10,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:50:10,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:50:10,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 10:50:10,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:10,328 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 105 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:10,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:10,674 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 105 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:10,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685375675] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:10,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:10,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 20 [2022-11-20 10:50:10,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20082165] [2022-11-20 10:50:10,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:10,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 10:50:10,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:10,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 10:50:10,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2022-11-20 10:50:10,676 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:10,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:10,963 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2022-11-20 10:50:10,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-20 10:50:10,964 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-20 10:50:10,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:10,964 INFO L225 Difference]: With dead ends: 72 [2022-11-20 10:50:10,965 INFO L226 Difference]: Without dead ends: 70 [2022-11-20 10:50:10,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 103 SyntacticMatches, 28 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=448, Invalid=812, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 10:50:10,966 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 126 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:10,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 31 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:50:10,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-20 10:50:10,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2022-11-20 10:50:10,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:10,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2022-11-20 10:50:10,976 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 60 [2022-11-20 10:50:10,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:10,976 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2022-11-20 10:50:10,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:10,977 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2022-11-20 10:50:10,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-20 10:50:10,977 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:10,977 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:10,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:11,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:11,178 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:11,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:11,178 INFO L85 PathProgramCache]: Analyzing trace with hash -312835919, now seen corresponding path program 27 times [2022-11-20 10:50:11,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:11,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16727487] [2022-11-20 10:50:11,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:11,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:11,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:11,756 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:11,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:11,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16727487] [2022-11-20 10:50:11,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16727487] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:11,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073447599] [2022-11-20 10:50:11,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:50:11,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:11,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:11,759 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:11,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-20 10:50:11,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-11-20 10:50:11,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:50:11,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 10:50:11,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:11,949 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:11,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:12,431 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:12,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073447599] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:12,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:12,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 34 [2022-11-20 10:50:12,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720561615] [2022-11-20 10:50:12,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:12,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 10:50:12,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:12,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 10:50:12,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 10:50:12,434 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:12,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:12,871 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2022-11-20 10:50:12,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-20 10:50:12,871 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-20 10:50:12,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:12,872 INFO L225 Difference]: With dead ends: 114 [2022-11-20 10:50:12,872 INFO L226 Difference]: Without dead ends: 65 [2022-11-20 10:50:12,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 94 SyntacticMatches, 31 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=594, Invalid=1856, Unknown=0, NotChecked=0, Total=2450 [2022-11-20 10:50:12,873 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 9 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:12,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 149 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:50:12,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-20 10:50:12,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-11-20 10:50:12,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:12,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2022-11-20 10:50:12,885 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 63 [2022-11-20 10:50:12,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:12,886 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2022-11-20 10:50:12,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:12,886 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2022-11-20 10:50:12,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-20 10:50:12,887 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:12,887 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:12,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-11-20 10:50:13,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-20 10:50:13,091 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:13,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:13,091 INFO L85 PathProgramCache]: Analyzing trace with hash -636884500, now seen corresponding path program 28 times [2022-11-20 10:50:13,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:13,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463903962] [2022-11-20 10:50:13,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:13,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:13,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:13,518 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 105 proven. 316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:13,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:13,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463903962] [2022-11-20 10:50:13,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463903962] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:13,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690185563] [2022-11-20 10:50:13,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:50:13,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:13,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:13,520 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:13,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-20 10:50:13,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:50:13,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:50:13,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 10:50:13,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:13,707 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 120 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:13,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:14,027 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 120 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:14,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690185563] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:14,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:14,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 21 [2022-11-20 10:50:14,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4751210] [2022-11-20 10:50:14,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:14,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 10:50:14,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:14,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 10:50:14,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=259, Unknown=0, NotChecked=0, Total=420 [2022-11-20 10:50:14,029 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:14,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:14,310 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2022-11-20 10:50:14,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-20 10:50:14,311 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-11-20 10:50:14,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:14,312 INFO L225 Difference]: With dead ends: 76 [2022-11-20 10:50:14,312 INFO L226 Difference]: Without dead ends: 74 [2022-11-20 10:50:14,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 110 SyntacticMatches, 30 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=501, Invalid=905, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 10:50:14,313 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 98 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:14,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 33 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:50:14,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-20 10:50:14,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2022-11-20 10:50:14,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:14,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2022-11-20 10:50:14,326 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 64 [2022-11-20 10:50:14,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:14,326 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2022-11-20 10:50:14,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:14,327 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2022-11-20 10:50:14,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-20 10:50:14,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:14,327 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:14,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:14,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:14,533 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:14,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:14,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1744194509, now seen corresponding path program 29 times [2022-11-20 10:50:14,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:14,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660211426] [2022-11-20 10:50:14,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:14,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:14,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:15,174 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:15,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:15,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660211426] [2022-11-20 10:50:15,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660211426] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:15,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476664145] [2022-11-20 10:50:15,175 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:50:15,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:15,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:15,176 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:15,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-20 10:50:15,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-11-20 10:50:15,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:50:15,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 10:50:15,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:15,359 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:15,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:15,854 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:15,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476664145] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:15,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:15,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 36 [2022-11-20 10:50:15,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481906512] [2022-11-20 10:50:15,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:15,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-20 10:50:15,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:15,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-20 10:50:15,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 10:50:15,857 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:16,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:16,275 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2022-11-20 10:50:16,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-20 10:50:16,275 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-20 10:50:16,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:16,276 INFO L225 Difference]: With dead ends: 121 [2022-11-20 10:50:16,276 INFO L226 Difference]: Without dead ends: 69 [2022-11-20 10:50:16,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 100 SyntacticMatches, 33 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=665, Invalid=2091, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 10:50:16,278 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 9 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:16,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 99 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:50:16,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-20 10:50:16,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-11-20 10:50:16,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:16,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-11-20 10:50:16,290 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 67 [2022-11-20 10:50:16,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:16,291 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-11-20 10:50:16,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:16,291 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-11-20 10:50:16,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-20 10:50:16,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:16,292 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:16,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:16,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:16,497 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:16,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:16,498 INFO L85 PathProgramCache]: Analyzing trace with hash 805871496, now seen corresponding path program 30 times [2022-11-20 10:50:16,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:16,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056316558] [2022-11-20 10:50:16,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:16,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:16,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:16,952 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 120 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:16,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:16,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056316558] [2022-11-20 10:50:16,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056316558] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:16,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25597413] [2022-11-20 10:50:16,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:50:16,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:16,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:16,954 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:16,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-20 10:50:17,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-11-20 10:50:17,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:50:17,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-20 10:50:17,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:17,180 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 136 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:17,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:17,557 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 136 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:17,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25597413] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:17,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:17,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 22 [2022-11-20 10:50:17,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900827886] [2022-11-20 10:50:17,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:17,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 10:50:17,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:17,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 10:50:17,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=283, Unknown=0, NotChecked=0, Total=462 [2022-11-20 10:50:17,559 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:17,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:17,854 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2022-11-20 10:50:17,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-20 10:50:17,855 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-20 10:50:17,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:17,856 INFO L225 Difference]: With dead ends: 80 [2022-11-20 10:50:17,856 INFO L226 Difference]: Without dead ends: 78 [2022-11-20 10:50:17,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 117 SyntacticMatches, 32 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=557, Invalid=1003, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 10:50:17,857 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 82 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:17,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 34 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:50:17,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-20 10:50:17,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2022-11-20 10:50:17,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:17,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2022-11-20 10:50:17,871 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 68 [2022-11-20 10:50:17,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:17,872 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2022-11-20 10:50:17,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:17,872 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2022-11-20 10:50:17,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-20 10:50:17,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:17,873 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:17,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:18,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-20 10:50:18,078 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:18,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:18,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1144627023, now seen corresponding path program 31 times [2022-11-20 10:50:18,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:18,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025858587] [2022-11-20 10:50:18,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:18,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:18,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:18,820 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:18,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:18,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025858587] [2022-11-20 10:50:18,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025858587] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:18,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777591898] [2022-11-20 10:50:18,821 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:50:18,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:18,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:18,823 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:18,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-20 10:50:18,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:18,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 10:50:18,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:19,013 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:19,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:19,569 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:19,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777591898] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:19,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:19,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 38 [2022-11-20 10:50:19,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666512071] [2022-11-20 10:50:19,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:19,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-20 10:50:19,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:19,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-20 10:50:19,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 10:50:19,572 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:20,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:20,029 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2022-11-20 10:50:20,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-20 10:50:20,030 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-20 10:50:20,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:20,030 INFO L225 Difference]: With dead ends: 128 [2022-11-20 10:50:20,030 INFO L226 Difference]: Without dead ends: 73 [2022-11-20 10:50:20,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 106 SyntacticMatches, 35 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=740, Invalid=2340, Unknown=0, NotChecked=0, Total=3080 [2022-11-20 10:50:20,033 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 9 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:20,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 121 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:50:20,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-20 10:50:20,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-11-20 10:50:20,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:20,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2022-11-20 10:50:20,042 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 71 [2022-11-20 10:50:20,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:20,042 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2022-11-20 10:50:20,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:20,042 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2022-11-20 10:50:20,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-20 10:50:20,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:20,043 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:20,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-11-20 10:50:20,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-20 10:50:20,244 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:20,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:20,244 INFO L85 PathProgramCache]: Analyzing trace with hash -960340244, now seen corresponding path program 32 times [2022-11-20 10:50:20,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:20,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488096509] [2022-11-20 10:50:20,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:20,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:20,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 136 proven. 409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:20,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:20,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488096509] [2022-11-20 10:50:20,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488096509] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:20,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12080385] [2022-11-20 10:50:20,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:50:20,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:20,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:20,723 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:20,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-20 10:50:20,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:50:20,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:50:20,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-20 10:50:20,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:20,949 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 153 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:20,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:21,384 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 153 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:21,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12080385] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:21,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:21,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 23 [2022-11-20 10:50:21,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145876206] [2022-11-20 10:50:21,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:21,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 10:50:21,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:21,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 10:50:21,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2022-11-20 10:50:21,386 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:21,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:21,739 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2022-11-20 10:50:21,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-20 10:50:21,740 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-11-20 10:50:21,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:21,741 INFO L225 Difference]: With dead ends: 84 [2022-11-20 10:50:21,741 INFO L226 Difference]: Without dead ends: 82 [2022-11-20 10:50:21,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 124 SyntacticMatches, 34 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=616, Invalid=1106, Unknown=0, NotChecked=0, Total=1722 [2022-11-20 10:50:21,742 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 152 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:21,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 31 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:50:21,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-20 10:50:21,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2022-11-20 10:50:21,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:21,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2022-11-20 10:50:21,754 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 72 [2022-11-20 10:50:21,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:21,754 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2022-11-20 10:50:21,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:21,754 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2022-11-20 10:50:21,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-20 10:50:21,755 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:21,755 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:21,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:21,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:21,957 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:21,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:21,957 INFO L85 PathProgramCache]: Analyzing trace with hash -714230067, now seen corresponding path program 33 times [2022-11-20 10:50:21,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:21,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821735687] [2022-11-20 10:50:21,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:21,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:21,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:22,743 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:22,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:22,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821735687] [2022-11-20 10:50:22,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821735687] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:22,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990508852] [2022-11-20 10:50:22,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:50:22,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:22,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:22,747 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:22,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-20 10:50:22,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-11-20 10:50:22,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:50:22,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-20 10:50:22,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:22,989 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:22,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:23,601 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:23,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990508852] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:23,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:23,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 40 [2022-11-20 10:50:23,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872985751] [2022-11-20 10:50:23,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:23,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-20 10:50:23,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:23,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-20 10:50:23,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 10:50:23,603 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:24,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:24,160 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2022-11-20 10:50:24,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-20 10:50:24,160 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-11-20 10:50:24,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:24,161 INFO L225 Difference]: With dead ends: 135 [2022-11-20 10:50:24,161 INFO L226 Difference]: Without dead ends: 77 [2022-11-20 10:50:24,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 112 SyntacticMatches, 37 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=819, Invalid=2603, Unknown=0, NotChecked=0, Total=3422 [2022-11-20 10:50:24,162 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 9 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:24,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 220 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:50:24,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-20 10:50:24,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-11-20 10:50:24,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:24,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2022-11-20 10:50:24,194 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 75 [2022-11-20 10:50:24,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:24,194 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2022-11-20 10:50:24,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:24,195 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2022-11-20 10:50:24,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-20 10:50:24,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:24,196 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:24,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:24,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-20 10:50:24,401 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:24,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:24,402 INFO L85 PathProgramCache]: Analyzing trace with hash -377872504, now seen corresponding path program 34 times [2022-11-20 10:50:24,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:24,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925324175] [2022-11-20 10:50:24,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:24,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:24,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:24,937 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 153 proven. 460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:24,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:24,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925324175] [2022-11-20 10:50:24,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925324175] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:24,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692426516] [2022-11-20 10:50:24,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:50:24,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:24,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:24,939 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:24,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-20 10:50:25,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:50:25,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:50:25,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-20 10:50:25,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:25,154 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 171 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:25,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:25,603 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 171 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:25,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692426516] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:25,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:25,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 24 [2022-11-20 10:50:25,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121348238] [2022-11-20 10:50:25,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:25,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 10:50:25,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:25,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 10:50:25,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=334, Unknown=0, NotChecked=0, Total=552 [2022-11-20 10:50:25,605 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:25,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:25,941 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2022-11-20 10:50:25,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-20 10:50:25,942 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-20 10:50:25,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:25,943 INFO L225 Difference]: With dead ends: 88 [2022-11-20 10:50:25,943 INFO L226 Difference]: Without dead ends: 86 [2022-11-20 10:50:25,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 131 SyntacticMatches, 36 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=678, Invalid=1214, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 10:50:25,944 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 128 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:25,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 27 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:50:25,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-20 10:50:25,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2022-11-20 10:50:25,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:25,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2022-11-20 10:50:25,961 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 76 [2022-11-20 10:50:25,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:25,961 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2022-11-20 10:50:25,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:25,961 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2022-11-20 10:50:25,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-20 10:50:25,962 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:25,962 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:25,968 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-11-20 10:50:26,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:26,168 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:26,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:26,168 INFO L85 PathProgramCache]: Analyzing trace with hash -85663567, now seen corresponding path program 35 times [2022-11-20 10:50:26,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:26,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658932401] [2022-11-20 10:50:26,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:26,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:26,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:27,024 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:27,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:27,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658932401] [2022-11-20 10:50:27,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658932401] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:27,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952855532] [2022-11-20 10:50:27,025 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:50:27,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:27,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:27,028 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:27,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-20 10:50:27,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2022-11-20 10:50:27,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:50:27,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-20 10:50:27,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:27,249 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:27,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:27,867 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:27,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952855532] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:27,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:27,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 42 [2022-11-20 10:50:27,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201651502] [2022-11-20 10:50:27,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:27,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-20 10:50:27,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:27,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-20 10:50:27,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2022-11-20 10:50:27,869 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 42 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 42 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:28,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:28,400 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2022-11-20 10:50:28,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-20 10:50:28,400 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 42 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-11-20 10:50:28,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:28,401 INFO L225 Difference]: With dead ends: 142 [2022-11-20 10:50:28,401 INFO L226 Difference]: Without dead ends: 81 [2022-11-20 10:50:28,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 118 SyntacticMatches, 39 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=902, Invalid=2880, Unknown=0, NotChecked=0, Total=3782 [2022-11-20 10:50:28,403 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:28,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 128 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:50:28,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-20 10:50:28,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-11-20 10:50:28,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:28,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2022-11-20 10:50:28,419 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 79 [2022-11-20 10:50:28,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:28,419 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2022-11-20 10:50:28,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 42 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:28,419 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2022-11-20 10:50:28,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-20 10:50:28,420 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:28,420 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:28,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:28,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-20 10:50:28,625 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:28,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:28,626 INFO L85 PathProgramCache]: Analyzing trace with hash -322407444, now seen corresponding path program 36 times [2022-11-20 10:50:28,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:28,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570046933] [2022-11-20 10:50:28,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:28,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:28,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:29,192 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 171 proven. 514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:29,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:29,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570046933] [2022-11-20 10:50:29,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570046933] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:29,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100889172] [2022-11-20 10:50:29,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:50:29,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:29,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:29,194 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:29,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-20 10:50:29,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-11-20 10:50:29,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:50:29,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-20 10:50:29,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:29,470 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 190 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:29,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:29,959 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 190 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:29,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100889172] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:29,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:29,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 25 [2022-11-20 10:50:29,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211983737] [2022-11-20 10:50:29,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:29,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 10:50:29,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:29,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 10:50:29,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=361, Unknown=0, NotChecked=0, Total=600 [2022-11-20 10:50:29,962 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:30,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:30,323 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2022-11-20 10:50:30,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 10:50:30,324 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-20 10:50:30,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:30,325 INFO L225 Difference]: With dead ends: 92 [2022-11-20 10:50:30,325 INFO L226 Difference]: Without dead ends: 90 [2022-11-20 10:50:30,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 138 SyntacticMatches, 38 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=743, Invalid=1327, Unknown=0, NotChecked=0, Total=2070 [2022-11-20 10:50:30,326 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 88 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:30,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 35 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:50:30,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-20 10:50:30,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2022-11-20 10:50:30,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 83 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:30,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2022-11-20 10:50:30,340 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 80 [2022-11-20 10:50:30,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:30,340 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2022-11-20 10:50:30,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:30,340 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2022-11-20 10:50:30,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-20 10:50:30,341 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:30,341 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:30,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-11-20 10:50:30,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-20 10:50:30,547 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:30,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:30,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1288470067, now seen corresponding path program 37 times [2022-11-20 10:50:30,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:30,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798377774] [2022-11-20 10:50:30,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:30,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:30,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:31,478 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:31,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:31,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798377774] [2022-11-20 10:50:31,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798377774] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:31,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216014083] [2022-11-20 10:50:31,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:50:31,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:31,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:31,480 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:31,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-20 10:50:31,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:31,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-20 10:50:31,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:31,744 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:31,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:32,441 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:32,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216014083] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:32,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:32,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 44 [2022-11-20 10:50:32,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970009870] [2022-11-20 10:50:32,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:32,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-20 10:50:32,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:32,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-20 10:50:32,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 10:50:32,443 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:33,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:33,025 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2022-11-20 10:50:33,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-20 10:50:33,025 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-11-20 10:50:33,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:33,026 INFO L225 Difference]: With dead ends: 149 [2022-11-20 10:50:33,026 INFO L226 Difference]: Without dead ends: 85 [2022-11-20 10:50:33,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 124 SyntacticMatches, 41 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1559 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=989, Invalid=3171, Unknown=0, NotChecked=0, Total=4160 [2022-11-20 10:50:33,028 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 9 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:33,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 171 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:50:33,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-20 10:50:33,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-11-20 10:50:33,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:33,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-11-20 10:50:33,043 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 83 [2022-11-20 10:50:33,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:33,043 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-11-20 10:50:33,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:33,044 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-11-20 10:50:33,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-20 10:50:33,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:33,045 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:33,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:33,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-20 10:50:33,250 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:33,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:33,250 INFO L85 PathProgramCache]: Analyzing trace with hash 374669192, now seen corresponding path program 38 times [2022-11-20 10:50:33,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:33,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036366990] [2022-11-20 10:50:33,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:33,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:33,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 190 proven. 571 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:33,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:33,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036366990] [2022-11-20 10:50:33,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036366990] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:33,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179026395] [2022-11-20 10:50:33,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:50:33,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:33,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:33,829 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:33,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-20 10:50:33,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:50:33,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:50:33,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-20 10:50:33,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:34,055 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 210 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:34,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:34,585 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 210 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:34,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179026395] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:34,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:34,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 26 [2022-11-20 10:50:34,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893508333] [2022-11-20 10:50:34,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:34,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 10:50:34,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:34,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 10:50:34,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=389, Unknown=0, NotChecked=0, Total=650 [2022-11-20 10:50:34,587 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:34,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:34,997 INFO L93 Difference]: Finished difference Result 96 states and 97 transitions. [2022-11-20 10:50:34,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-20 10:50:34,998 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-20 10:50:34,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:34,998 INFO L225 Difference]: With dead ends: 96 [2022-11-20 10:50:34,998 INFO L226 Difference]: Without dead ends: 94 [2022-11-20 10:50:34,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 145 SyntacticMatches, 40 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=811, Invalid=1445, Unknown=0, NotChecked=0, Total=2256 [2022-11-20 10:50:34,999 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 172 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:35,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 37 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:50:35,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-20 10:50:35,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2022-11-20 10:50:35,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:35,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2022-11-20 10:50:35,021 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 84 [2022-11-20 10:50:35,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:35,021 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2022-11-20 10:50:35,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:35,021 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2022-11-20 10:50:35,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-20 10:50:35,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:35,022 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:35,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:35,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-20 10:50:35,229 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:35,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:35,229 INFO L85 PathProgramCache]: Analyzing trace with hash -845283151, now seen corresponding path program 39 times [2022-11-20 10:50:35,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:35,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636529997] [2022-11-20 10:50:35,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:35,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:35,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:36,276 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:36,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:36,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636529997] [2022-11-20 10:50:36,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636529997] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:36,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479415921] [2022-11-20 10:50:36,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:50:36,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:36,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:36,280 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:36,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-20 10:50:36,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2022-11-20 10:50:36,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:50:36,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-20 10:50:36,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:36,526 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:36,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:37,257 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:37,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479415921] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:37,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:37,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 46 [2022-11-20 10:50:37,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524260403] [2022-11-20 10:50:37,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:37,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-20 10:50:37,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:37,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-20 10:50:37,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1540, Unknown=0, NotChecked=0, Total=2070 [2022-11-20 10:50:37,260 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:37,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:37,883 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2022-11-20 10:50:37,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 10:50:37,883 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2022-11-20 10:50:37,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:37,883 INFO L225 Difference]: With dead ends: 156 [2022-11-20 10:50:37,883 INFO L226 Difference]: Without dead ends: 89 [2022-11-20 10:50:37,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 130 SyntacticMatches, 43 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1711 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1080, Invalid=3476, Unknown=0, NotChecked=0, Total=4556 [2022-11-20 10:50:37,885 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:37,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 155 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:50:37,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-20 10:50:37,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-11-20 10:50:37,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:37,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2022-11-20 10:50:37,905 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 87 [2022-11-20 10:50:37,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:37,905 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2022-11-20 10:50:37,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:37,906 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2022-11-20 10:50:37,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-20 10:50:37,906 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:37,906 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:37,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:38,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:38,113 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:38,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:38,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1543231252, now seen corresponding path program 40 times [2022-11-20 10:50:38,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:38,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120382340] [2022-11-20 10:50:38,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:38,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:38,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:38,777 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 210 proven. 631 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:38,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:38,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120382340] [2022-11-20 10:50:38,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120382340] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:38,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60103862] [2022-11-20 10:50:38,778 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:50:38,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:38,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:38,779 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:38,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-20 10:50:38,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:50:38,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:50:38,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-20 10:50:38,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:39,043 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 231 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:39,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:39,583 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 231 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:39,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60103862] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:39,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:39,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 27 [2022-11-20 10:50:39,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940974275] [2022-11-20 10:50:39,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:39,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 10:50:39,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:39,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 10:50:39,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=418, Unknown=0, NotChecked=0, Total=702 [2022-11-20 10:50:39,585 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 27 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:39,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:39,988 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2022-11-20 10:50:39,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-20 10:50:39,989 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 27 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2022-11-20 10:50:39,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:39,990 INFO L225 Difference]: With dead ends: 100 [2022-11-20 10:50:39,990 INFO L226 Difference]: Without dead ends: 98 [2022-11-20 10:50:39,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 152 SyntacticMatches, 42 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=882, Invalid=1568, Unknown=0, NotChecked=0, Total=2450 [2022-11-20 10:50:39,991 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 140 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:39,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 36 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:50:39,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-20 10:50:40,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 92. [2022-11-20 10:50:40,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:40,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2022-11-20 10:50:40,013 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 88 [2022-11-20 10:50:40,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:40,013 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2022-11-20 10:50:40,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 27 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:40,014 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2022-11-20 10:50:40,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-20 10:50:40,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:40,014 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:40,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:40,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-11-20 10:50:40,220 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:40,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:40,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1067471667, now seen corresponding path program 41 times [2022-11-20 10:50:40,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:40,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025122601] [2022-11-20 10:50:40,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:40,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:40,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:41,255 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:41,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:41,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025122601] [2022-11-20 10:50:41,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025122601] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:41,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751363508] [2022-11-20 10:50:41,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:50:41,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:41,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:41,257 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:41,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-20 10:50:41,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2022-11-20 10:50:41,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:50:41,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-20 10:50:41,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:41,572 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:41,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:42,368 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:42,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751363508] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:42,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:42,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 48 [2022-11-20 10:50:42,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146309888] [2022-11-20 10:50:42,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:42,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-20 10:50:42,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:42,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-20 10:50:42,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=1679, Unknown=0, NotChecked=0, Total=2256 [2022-11-20 10:50:42,371 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 48 states, 48 states have (on average 1.9375) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:43,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:43,101 INFO L93 Difference]: Finished difference Result 163 states and 165 transitions. [2022-11-20 10:50:43,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-20 10:50:43,101 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.9375) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-11-20 10:50:43,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:43,102 INFO L225 Difference]: With dead ends: 163 [2022-11-20 10:50:43,102 INFO L226 Difference]: Without dead ends: 93 [2022-11-20 10:50:43,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 136 SyntacticMatches, 45 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1870 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1175, Invalid=3795, Unknown=0, NotChecked=0, Total=4970 [2022-11-20 10:50:43,104 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 9 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:43,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 221 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:50:43,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-20 10:50:43,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-11-20 10:50:43,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:43,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2022-11-20 10:50:43,126 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 91 [2022-11-20 10:50:43,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:43,127 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2022-11-20 10:50:43,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.9375) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:43,127 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2022-11-20 10:50:43,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-20 10:50:43,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:43,128 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:43,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:43,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:43,334 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:43,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:43,334 INFO L85 PathProgramCache]: Analyzing trace with hash 716259208, now seen corresponding path program 42 times [2022-11-20 10:50:43,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:43,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485392137] [2022-11-20 10:50:43,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:43,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:43,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:44,033 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 231 proven. 694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:44,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:44,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485392137] [2022-11-20 10:50:44,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485392137] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:44,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386870265] [2022-11-20 10:50:44,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:50:44,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:44,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:44,034 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:44,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-20 10:50:44,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-11-20 10:50:44,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:50:44,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-20 10:50:44,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:44,317 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 253 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:44,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:44,910 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 253 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:44,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386870265] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:44,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:44,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 28 [2022-11-20 10:50:44,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329356742] [2022-11-20 10:50:44,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:44,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 10:50:44,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:44,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 10:50:44,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=448, Unknown=0, NotChecked=0, Total=756 [2022-11-20 10:50:44,912 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:45,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:45,330 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions. [2022-11-20 10:50:45,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-20 10:50:45,330 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-20 10:50:45,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:45,331 INFO L225 Difference]: With dead ends: 104 [2022-11-20 10:50:45,331 INFO L226 Difference]: Without dead ends: 102 [2022-11-20 10:50:45,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 159 SyntacticMatches, 44 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=956, Invalid=1696, Unknown=0, NotChecked=0, Total=2652 [2022-11-20 10:50:45,332 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 140 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:45,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 27 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:50:45,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-20 10:50:45,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2022-11-20 10:50:45,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:45,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2022-11-20 10:50:45,346 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 92 [2022-11-20 10:50:45,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:45,346 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2022-11-20 10:50:45,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:45,347 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2022-11-20 10:50:45,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-20 10:50:45,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:45,347 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:45,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:45,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:45,548 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:45,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:45,548 INFO L85 PathProgramCache]: Analyzing trace with hash 685359281, now seen corresponding path program 43 times [2022-11-20 10:50:45,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:45,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511574456] [2022-11-20 10:50:45,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:45,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:45,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:46,531 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:46,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:46,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511574456] [2022-11-20 10:50:46,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511574456] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:46,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085595753] [2022-11-20 10:50:46,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:50:46,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:46,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:46,533 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:46,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-20 10:50:46,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:46,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-20 10:50:46,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:46,771 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:46,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:47,674 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:47,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085595753] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:47,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:47,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 50 [2022-11-20 10:50:47,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962078354] [2022-11-20 10:50:47,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:47,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-20 10:50:47,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:47,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-20 10:50:47,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=1824, Unknown=0, NotChecked=0, Total=2450 [2022-11-20 10:50:47,676 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 50 states, 50 states have (on average 1.94) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:48,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:48,402 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2022-11-20 10:50:48,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-20 10:50:48,402 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.94) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2022-11-20 10:50:48,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:48,403 INFO L225 Difference]: With dead ends: 170 [2022-11-20 10:50:48,403 INFO L226 Difference]: Without dead ends: 97 [2022-11-20 10:50:48,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 142 SyntacticMatches, 47 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2036 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1274, Invalid=4128, Unknown=0, NotChecked=0, Total=5402 [2022-11-20 10:50:48,405 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 9 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:48,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 205 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:50:48,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-20 10:50:48,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-11-20 10:50:48,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:48,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2022-11-20 10:50:48,426 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 95 [2022-11-20 10:50:48,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:48,426 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2022-11-20 10:50:48,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.94) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:48,426 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2022-11-20 10:50:48,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-20 10:50:48,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:48,427 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:48,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-11-20 10:50:48,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-20 10:50:48,627 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:48,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:48,628 INFO L85 PathProgramCache]: Analyzing trace with hash 375225836, now seen corresponding path program 44 times [2022-11-20 10:50:48,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:48,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120360480] [2022-11-20 10:50:48,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:48,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:49,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 253 proven. 760 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:49,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:49,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120360480] [2022-11-20 10:50:49,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120360480] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:49,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955382912] [2022-11-20 10:50:49,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:50:49,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:49,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:49,306 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:49,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-20 10:50:49,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:50:49,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:50:49,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-20 10:50:49,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:49,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 276 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:49,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:50,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 276 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:50,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955382912] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:50,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:50,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 29 [2022-11-20 10:50:50,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171527870] [2022-11-20 10:50:50,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:50,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-20 10:50:50,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:50,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-20 10:50:50,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=479, Unknown=0, NotChecked=0, Total=812 [2022-11-20 10:50:50,144 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:50,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:50,590 INFO L93 Difference]: Finished difference Result 108 states and 109 transitions. [2022-11-20 10:50:50,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-20 10:50:50,590 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2022-11-20 10:50:50,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:50,591 INFO L225 Difference]: With dead ends: 108 [2022-11-20 10:50:50,591 INFO L226 Difference]: Without dead ends: 106 [2022-11-20 10:50:50,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 166 SyntacticMatches, 46 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1033, Invalid=1829, Unknown=0, NotChecked=0, Total=2862 [2022-11-20 10:50:50,592 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 154 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:50,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 33 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:50:50,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-20 10:50:50,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 100. [2022-11-20 10:50:50,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:50,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2022-11-20 10:50:50,615 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 96 [2022-11-20 10:50:50,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:50,616 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2022-11-20 10:50:50,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:50,616 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2022-11-20 10:50:50,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-20 10:50:50,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:50,617 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:50,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-11-20 10:50:50,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:50,817 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:50,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:50,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1442170931, now seen corresponding path program 45 times [2022-11-20 10:50:50,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:50,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380060693] [2022-11-20 10:50:50,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:50,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:50,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:52,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:52,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380060693] [2022-11-20 10:50:52,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380060693] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:52,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872664005] [2022-11-20 10:50:52,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:50:52,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:52,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:52,012 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:52,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-20 10:50:52,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-11-20 10:50:52,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:50:52,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-20 10:50:52,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:52,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:52,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:53,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:53,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872664005] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:53,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:53,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 52 [2022-11-20 10:50:53,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397150888] [2022-11-20 10:50:53,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:53,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-20 10:50:53,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:53,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-20 10:50:53,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=1975, Unknown=0, NotChecked=0, Total=2652 [2022-11-20 10:50:53,200 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 52 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 52 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:54,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:54,009 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2022-11-20 10:50:54,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-20 10:50:54,010 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 52 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2022-11-20 10:50:54,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:54,011 INFO L225 Difference]: With dead ends: 177 [2022-11-20 10:50:54,011 INFO L226 Difference]: Without dead ends: 101 [2022-11-20 10:50:54,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 148 SyntacticMatches, 49 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2209 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1377, Invalid=4475, Unknown=0, NotChecked=0, Total=5852 [2022-11-20 10:50:54,012 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 9 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:54,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 227 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:50:54,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-20 10:50:54,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-11-20 10:50:54,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:54,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2022-11-20 10:50:54,029 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 99 [2022-11-20 10:50:54,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:54,029 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2022-11-20 10:50:54,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 52 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:54,029 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2022-11-20 10:50:54,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-20 10:50:54,030 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:54,030 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:54,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:54,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-20 10:50:54,236 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:54,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:54,237 INFO L85 PathProgramCache]: Analyzing trace with hash -2002329720, now seen corresponding path program 46 times [2022-11-20 10:50:54,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:54,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74549108] [2022-11-20 10:50:54,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:54,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:54,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:54,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 276 proven. 829 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:54,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:54,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74549108] [2022-11-20 10:50:54,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74549108] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:54,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718033060] [2022-11-20 10:50:54,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:50:54,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:54,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:54,852 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:54,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-20 10:50:54,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:50:54,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:50:54,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-20 10:50:54,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:55,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 300 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:55,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:55,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 300 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:55,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718033060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:55,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:55,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 30 [2022-11-20 10:50:55,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037866025] [2022-11-20 10:50:55,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:55,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-20 10:50:55,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:55,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-20 10:50:55,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=511, Unknown=0, NotChecked=0, Total=870 [2022-11-20 10:50:55,826 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:56,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:56,304 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2022-11-20 10:50:56,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-20 10:50:56,305 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2022-11-20 10:50:56,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:56,306 INFO L225 Difference]: With dead ends: 112 [2022-11-20 10:50:56,306 INFO L226 Difference]: Without dead ends: 110 [2022-11-20 10:50:56,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 173 SyntacticMatches, 48 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1113, Invalid=1967, Unknown=0, NotChecked=0, Total=3080 [2022-11-20 10:50:56,307 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 166 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:56,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 27 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:50:56,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-20 10:50:56,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 104. [2022-11-20 10:50:56,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:56,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2022-11-20 10:50:56,324 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 100 [2022-11-20 10:50:56,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:56,324 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2022-11-20 10:50:56,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:56,325 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2022-11-20 10:50:56,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-20 10:50:56,325 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:56,325 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:56,333 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-11-20 10:50:56,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-20 10:50:56,532 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:56,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:56,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1400905905, now seen corresponding path program 47 times [2022-11-20 10:50:56,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:56,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071278086] [2022-11-20 10:50:56,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:56,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:56,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:57,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:57,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:57,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071278086] [2022-11-20 10:50:57,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071278086] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:57,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640933344] [2022-11-20 10:50:57,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:50:57,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:57,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:57,661 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:57,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-20 10:50:57,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2022-11-20 10:50:57,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:50:57,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-20 10:50:57,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:57,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:57,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:58,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:58,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640933344] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:58,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:58,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 54 [2022-11-20 10:50:58,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044514821] [2022-11-20 10:50:58,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:58,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-20 10:50:58,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:58,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-20 10:50:58,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=2132, Unknown=0, NotChecked=0, Total=2862 [2022-11-20 10:50:58,897 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand has 54 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:59,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:59,671 INFO L93 Difference]: Finished difference Result 184 states and 186 transitions. [2022-11-20 10:50:59,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-20 10:50:59,671 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2022-11-20 10:50:59,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:59,672 INFO L225 Difference]: With dead ends: 184 [2022-11-20 10:50:59,672 INFO L226 Difference]: Without dead ends: 105 [2022-11-20 10:50:59,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 154 SyntacticMatches, 51 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2389 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1484, Invalid=4836, Unknown=0, NotChecked=0, Total=6320 [2022-11-20 10:50:59,673 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 9 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:59,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 175 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:50:59,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-20 10:50:59,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-11-20 10:50:59,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:59,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2022-11-20 10:50:59,700 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 103 [2022-11-20 10:50:59,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:59,700 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2022-11-20 10:50:59,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:59,700 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2022-11-20 10:50:59,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-20 10:50:59,701 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:59,701 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:59,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:59,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-20 10:50:59,907 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:59,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:59,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1078168852, now seen corresponding path program 48 times [2022-11-20 10:50:59,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:59,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183734250] [2022-11-20 10:50:59,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:59,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:59,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:00,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 300 proven. 901 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:00,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:00,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183734250] [2022-11-20 10:51:00,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183734250] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:00,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303272505] [2022-11-20 10:51:00,561 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:51:00,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:00,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:00,562 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:00,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-20 10:51:00,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-11-20 10:51:00,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:00,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-20 10:51:00,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:00,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 325 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:00,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:01,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 325 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:01,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303272505] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:01,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:01,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 31 [2022-11-20 10:51:01,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746580147] [2022-11-20 10:51:01,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:01,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-20 10:51:01,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:01,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-20 10:51:01,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=544, Unknown=0, NotChecked=0, Total=930 [2022-11-20 10:51:01,563 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:02,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:02,068 INFO L93 Difference]: Finished difference Result 116 states and 117 transitions. [2022-11-20 10:51:02,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-20 10:51:02,069 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2022-11-20 10:51:02,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:02,070 INFO L225 Difference]: With dead ends: 116 [2022-11-20 10:51:02,070 INFO L226 Difference]: Without dead ends: 114 [2022-11-20 10:51:02,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 180 SyntacticMatches, 50 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1196, Invalid=2110, Unknown=0, NotChecked=0, Total=3306 [2022-11-20 10:51:02,070 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 110 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:02,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 35 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:51:02,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-20 10:51:02,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 108. [2022-11-20 10:51:02,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:02,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2022-11-20 10:51:02,088 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 104 [2022-11-20 10:51:02,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:02,089 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2022-11-20 10:51:02,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:02,089 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2022-11-20 10:51:02,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-20 10:51:02,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:02,089 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:02,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:02,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-20 10:51:02,291 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:02,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:02,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1958010163, now seen corresponding path program 49 times [2022-11-20 10:51:02,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:02,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465903255] [2022-11-20 10:51:02,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:02,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:02,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:03,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:03,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:03,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465903255] [2022-11-20 10:51:03,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465903255] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:03,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833467717] [2022-11-20 10:51:03,515 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:51:03,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:03,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:03,522 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:03,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-20 10:51:03,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:03,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-20 10:51:03,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:03,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:03,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:04,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:04,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833467717] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:04,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:04,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 56 [2022-11-20 10:51:04,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105642693] [2022-11-20 10:51:04,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:04,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-20 10:51:04,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:04,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-20 10:51:04,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=2295, Unknown=0, NotChecked=0, Total=3080 [2022-11-20 10:51:04,964 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:05,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:05,999 INFO L93 Difference]: Finished difference Result 191 states and 193 transitions. [2022-11-20 10:51:05,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-20 10:51:05,999 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2022-11-20 10:51:06,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:06,001 INFO L225 Difference]: With dead ends: 191 [2022-11-20 10:51:06,001 INFO L226 Difference]: Without dead ends: 109 [2022-11-20 10:51:06,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 160 SyntacticMatches, 53 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2576 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1595, Invalid=5211, Unknown=0, NotChecked=0, Total=6806 [2022-11-20 10:51:06,002 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 9 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:06,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 238 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:51:06,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-20 10:51:06,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-11-20 10:51:06,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:06,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2022-11-20 10:51:06,023 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 107 [2022-11-20 10:51:06,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:06,023 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2022-11-20 10:51:06,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:06,023 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2022-11-20 10:51:06,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-20 10:51:06,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:06,024 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:06,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-11-20 10:51:06,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-11-20 10:51:06,227 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:06,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:06,227 INFO L85 PathProgramCache]: Analyzing trace with hash 5103496, now seen corresponding path program 50 times [2022-11-20 10:51:06,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:06,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616404380] [2022-11-20 10:51:06,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:06,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:06,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:06,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 325 proven. 976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:06,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:06,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616404380] [2022-11-20 10:51:06,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616404380] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:06,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90697904] [2022-11-20 10:51:06,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:51:06,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:06,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:06,978 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:06,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-20 10:51:07,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:51:07,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:07,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-20 10:51:07,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:07,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 351 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:07,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:08,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 351 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:08,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90697904] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:08,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:08,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 32 [2022-11-20 10:51:08,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046035139] [2022-11-20 10:51:08,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:08,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 10:51:08,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:08,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 10:51:08,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=578, Unknown=0, NotChecked=0, Total=992 [2022-11-20 10:51:08,124 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 32 states, 32 states have (on average 3.5) internal successors, (112), 32 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:08,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:08,698 INFO L93 Difference]: Finished difference Result 120 states and 121 transitions. [2022-11-20 10:51:08,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-20 10:51:08,699 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.5) internal successors, (112), 32 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2022-11-20 10:51:08,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:08,700 INFO L225 Difference]: With dead ends: 120 [2022-11-20 10:51:08,700 INFO L226 Difference]: Without dead ends: 118 [2022-11-20 10:51:08,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 187 SyntacticMatches, 52 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1632 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1282, Invalid=2258, Unknown=0, NotChecked=0, Total=3540 [2022-11-20 10:51:08,701 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 166 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:08,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 29 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:51:08,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-20 10:51:08,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 112. [2022-11-20 10:51:08,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:08,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2022-11-20 10:51:08,722 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 108 [2022-11-20 10:51:08,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:08,723 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2022-11-20 10:51:08,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.5) internal successors, (112), 32 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:08,723 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2022-11-20 10:51:08,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-20 10:51:08,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:08,724 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:08,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:08,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:08,930 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:08,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:08,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1719214257, now seen corresponding path program 51 times [2022-11-20 10:51:08,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:08,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603371688] [2022-11-20 10:51:08,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:08,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:08,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:10,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:10,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:10,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603371688] [2022-11-20 10:51:10,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603371688] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:10,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997424214] [2022-11-20 10:51:10,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:51:10,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:10,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:10,331 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:10,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-20 10:51:10,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2022-11-20 10:51:10,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:10,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-20 10:51:10,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:10,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:10,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:11,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:11,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997424214] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:11,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:11,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 58 [2022-11-20 10:51:11,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677002380] [2022-11-20 10:51:11,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:11,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-20 10:51:11,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:11,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-20 10:51:11,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=842, Invalid=2464, Unknown=0, NotChecked=0, Total=3306 [2022-11-20 10:51:11,755 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 58 states, 58 states have (on average 1.9482758620689655) internal successors, (113), 58 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:12,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:12,698 INFO L93 Difference]: Finished difference Result 198 states and 200 transitions. [2022-11-20 10:51:12,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-20 10:51:12,698 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9482758620689655) internal successors, (113), 58 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2022-11-20 10:51:12,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:12,699 INFO L225 Difference]: With dead ends: 198 [2022-11-20 10:51:12,699 INFO L226 Difference]: Without dead ends: 113 [2022-11-20 10:51:12,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 166 SyntacticMatches, 55 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2770 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1710, Invalid=5600, Unknown=0, NotChecked=0, Total=7310 [2022-11-20 10:51:12,701 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 9 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:12,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 208 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:51:12,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-20 10:51:12,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-11-20 10:51:12,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:12,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2022-11-20 10:51:12,731 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 111 [2022-11-20 10:51:12,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:12,731 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2022-11-20 10:51:12,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9482758620689655) internal successors, (113), 58 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:12,732 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2022-11-20 10:51:12,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-20 10:51:12,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:12,733 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:12,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:12,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:12,938 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:12,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:12,939 INFO L85 PathProgramCache]: Analyzing trace with hash -301398036, now seen corresponding path program 52 times [2022-11-20 10:51:12,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:12,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266400468] [2022-11-20 10:51:12,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:12,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:12,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:13,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 351 proven. 1054 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:13,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:13,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266400468] [2022-11-20 10:51:13,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266400468] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:13,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759426480] [2022-11-20 10:51:13,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:51:13,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:13,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:13,816 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:13,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-20 10:51:13,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:51:13,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:13,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-20 10:51:13,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:14,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 378 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:14,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:14,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 378 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:14,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759426480] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:14,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:14,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 33 [2022-11-20 10:51:14,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416534426] [2022-11-20 10:51:14,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:14,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-20 10:51:14,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:14,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-20 10:51:14,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=613, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 10:51:14,954 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:15,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:15,533 INFO L93 Difference]: Finished difference Result 124 states and 125 transitions. [2022-11-20 10:51:15,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-20 10:51:15,533 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2022-11-20 10:51:15,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:15,534 INFO L225 Difference]: With dead ends: 124 [2022-11-20 10:51:15,535 INFO L226 Difference]: Without dead ends: 122 [2022-11-20 10:51:15,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 194 SyntacticMatches, 54 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1749 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1371, Invalid=2411, Unknown=0, NotChecked=0, Total=3782 [2022-11-20 10:51:15,535 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 228 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:15,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 27 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:51:15,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-20 10:51:15,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 116. [2022-11-20 10:51:15,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.017391304347826) internal successors, (117), 115 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:15,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2022-11-20 10:51:15,568 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 112 [2022-11-20 10:51:15,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:15,569 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2022-11-20 10:51:15,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:15,569 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2022-11-20 10:51:15,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-20 10:51:15,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:15,569 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:15,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:15,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-11-20 10:51:15,776 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:15,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:15,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1832545741, now seen corresponding path program 53 times [2022-11-20 10:51:15,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:15,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253594645] [2022-11-20 10:51:15,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:15,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:15,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:17,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:17,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:17,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253594645] [2022-11-20 10:51:17,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253594645] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:17,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431087709] [2022-11-20 10:51:17,241 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:51:17,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:17,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:17,242 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:17,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-20 10:51:17,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2022-11-20 10:51:17,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:17,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-20 10:51:17,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:17,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:17,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:18,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:18,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431087709] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:18,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:18,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 60 [2022-11-20 10:51:18,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558018656] [2022-11-20 10:51:18,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:18,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-20 10:51:18,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:18,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-20 10:51:18,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=2639, Unknown=0, NotChecked=0, Total=3540 [2022-11-20 10:51:18,800 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand has 60 states, 60 states have (on average 1.95) internal successors, (117), 60 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:19,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:19,824 INFO L93 Difference]: Finished difference Result 205 states and 207 transitions. [2022-11-20 10:51:19,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-20 10:51:19,825 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.95) internal successors, (117), 60 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2022-11-20 10:51:19,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:19,826 INFO L225 Difference]: With dead ends: 205 [2022-11-20 10:51:19,826 INFO L226 Difference]: Without dead ends: 117 [2022-11-20 10:51:19,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 172 SyntacticMatches, 57 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2971 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1829, Invalid=6003, Unknown=0, NotChecked=0, Total=7832 [2022-11-20 10:51:19,827 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 9 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:19,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 234 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:51:19,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-20 10:51:19,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-11-20 10:51:19,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:19,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2022-11-20 10:51:19,870 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 115 [2022-11-20 10:51:19,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:19,872 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2022-11-20 10:51:19,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.95) internal successors, (117), 60 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:19,872 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2022-11-20 10:51:19,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-20 10:51:19,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:19,873 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:19,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:20,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-11-20 10:51:20,080 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:20,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:20,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1337868168, now seen corresponding path program 54 times [2022-11-20 10:51:20,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:20,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477010122] [2022-11-20 10:51:20,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:20,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:20,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:20,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 378 proven. 1135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:20,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:20,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477010122] [2022-11-20 10:51:20,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477010122] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:20,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913837779] [2022-11-20 10:51:20,861 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:51:20,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:20,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:20,862 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:20,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-20 10:51:21,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2022-11-20 10:51:21,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:21,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-20 10:51:21,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:21,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 406 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:21,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:22,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 406 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:22,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913837779] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:22,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:22,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 34 [2022-11-20 10:51:22,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445398902] [2022-11-20 10:51:22,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:22,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 10:51:22,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:22,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 10:51:22,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=649, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 10:51:22,054 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:22,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:22,627 INFO L93 Difference]: Finished difference Result 128 states and 129 transitions. [2022-11-20 10:51:22,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-20 10:51:22,627 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2022-11-20 10:51:22,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:22,628 INFO L225 Difference]: With dead ends: 128 [2022-11-20 10:51:22,628 INFO L226 Difference]: Without dead ends: 126 [2022-11-20 10:51:22,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 201 SyntacticMatches, 56 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1870 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1463, Invalid=2569, Unknown=0, NotChecked=0, Total=4032 [2022-11-20 10:51:22,630 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 188 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:22,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 26 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:51:22,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-20 10:51:22,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 120. [2022-11-20 10:51:22,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 119 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:22,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2022-11-20 10:51:22,664 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 116 [2022-11-20 10:51:22,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:22,664 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2022-11-20 10:51:22,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:22,665 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2022-11-20 10:51:22,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-20 10:51:22,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:22,666 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:22,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-11-20 10:51:22,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-11-20 10:51:22,871 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:22,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:22,872 INFO L85 PathProgramCache]: Analyzing trace with hash -861093711, now seen corresponding path program 55 times [2022-11-20 10:51:22,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:22,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536656360] [2022-11-20 10:51:22,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:22,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:22,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:24,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:24,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:24,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536656360] [2022-11-20 10:51:24,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536656360] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:24,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842492895] [2022-11-20 10:51:24,623 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:51:24,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:24,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:24,624 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:24,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-11-20 10:51:24,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:24,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-20 10:51:24,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:24,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:24,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:26,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:26,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842492895] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:26,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:26,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 62 [2022-11-20 10:51:26,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725067564] [2022-11-20 10:51:26,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:26,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-20 10:51:26,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:26,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-20 10:51:26,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=962, Invalid=2820, Unknown=0, NotChecked=0, Total=3782 [2022-11-20 10:51:26,107 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand has 62 states, 62 states have (on average 1.9516129032258065) internal successors, (121), 62 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:27,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:27,266 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2022-11-20 10:51:27,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-20 10:51:27,266 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.9516129032258065) internal successors, (121), 62 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2022-11-20 10:51:27,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:27,267 INFO L225 Difference]: With dead ends: 212 [2022-11-20 10:51:27,268 INFO L226 Difference]: Without dead ends: 121 [2022-11-20 10:51:27,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 178 SyntacticMatches, 59 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3179 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1952, Invalid=6420, Unknown=0, NotChecked=0, Total=8372 [2022-11-20 10:51:27,269 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 9 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:27,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 258 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:51:27,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-20 10:51:27,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-11-20 10:51:27,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:27,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2022-11-20 10:51:27,303 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 119 [2022-11-20 10:51:27,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:27,303 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2022-11-20 10:51:27,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.9516129032258065) internal successors, (121), 62 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:27,304 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2022-11-20 10:51:27,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-20 10:51:27,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:27,304 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:27,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:27,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-11-20 10:51:27,510 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:27,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:27,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1093352684, now seen corresponding path program 56 times [2022-11-20 10:51:27,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:27,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57122082] [2022-11-20 10:51:27,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:27,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:27,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:28,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 406 proven. 1219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:28,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:28,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57122082] [2022-11-20 10:51:28,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57122082] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:28,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629675495] [2022-11-20 10:51:28,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:51:28,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:28,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:28,472 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:28,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-11-20 10:51:28,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:51:28,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:28,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-20 10:51:28,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:28,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 435 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:28,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:29,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 435 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:29,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629675495] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:29,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:29,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 35 [2022-11-20 10:51:29,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2223990] [2022-11-20 10:51:29,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:29,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 10:51:29,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:29,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 10:51:29,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=686, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 10:51:29,647 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:30,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:30,296 INFO L93 Difference]: Finished difference Result 132 states and 133 transitions. [2022-11-20 10:51:30,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-20 10:51:30,297 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-11-20 10:51:30,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:30,298 INFO L225 Difference]: With dead ends: 132 [2022-11-20 10:51:30,298 INFO L226 Difference]: Without dead ends: 130 [2022-11-20 10:51:30,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 208 SyntacticMatches, 58 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1995 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1558, Invalid=2732, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 10:51:30,299 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 188 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:30,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 30 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:51:30,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-20 10:51:30,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 124. [2022-11-20 10:51:30,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.016260162601626) internal successors, (125), 123 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:30,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2022-11-20 10:51:30,322 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 120 [2022-11-20 10:51:30,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:30,322 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2022-11-20 10:51:30,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:30,322 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2022-11-20 10:51:30,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-20 10:51:30,323 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:30,323 INFO L195 NwaCegarLoop]: trace histogram [30, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:30,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:30,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:30,529 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:30,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:30,529 INFO L85 PathProgramCache]: Analyzing trace with hash -957343539, now seen corresponding path program 57 times [2022-11-20 10:51:30,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:30,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144435955] [2022-11-20 10:51:30,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:30,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:30,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:32,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:32,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:32,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144435955] [2022-11-20 10:51:32,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144435955] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:32,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41452921] [2022-11-20 10:51:32,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:51:32,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:32,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:32,230 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:32,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-11-20 10:51:32,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2022-11-20 10:51:32,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:32,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-20 10:51:32,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:32,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:32,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:33,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:33,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41452921] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:33,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:33,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 64 [2022-11-20 10:51:33,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891593487] [2022-11-20 10:51:33,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:33,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-20 10:51:33,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:33,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-20 10:51:33,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2022-11-20 10:51:33,890 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand has 64 states, 64 states have (on average 1.953125) internal successors, (125), 64 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:35,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:35,017 INFO L93 Difference]: Finished difference Result 219 states and 221 transitions. [2022-11-20 10:51:35,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-20 10:51:35,017 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.953125) internal successors, (125), 64 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2022-11-20 10:51:35,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:35,018 INFO L225 Difference]: With dead ends: 219 [2022-11-20 10:51:35,018 INFO L226 Difference]: Without dead ends: 125 [2022-11-20 10:51:35,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 184 SyntacticMatches, 61 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3394 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2079, Invalid=6851, Unknown=0, NotChecked=0, Total=8930 [2022-11-20 10:51:35,019 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 9 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:35,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 291 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:51:35,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-20 10:51:35,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-11-20 10:51:35,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:35,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2022-11-20 10:51:35,057 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 123 [2022-11-20 10:51:35,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:35,057 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2022-11-20 10:51:35,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.953125) internal successors, (125), 64 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:35,057 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2022-11-20 10:51:35,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-20 10:51:35,058 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:35,058 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:35,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:35,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-11-20 10:51:35,277 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:35,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:35,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1559232632, now seen corresponding path program 58 times [2022-11-20 10:51:35,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:35,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113862896] [2022-11-20 10:51:35,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:35,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:35,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:36,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 435 proven. 1306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:36,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:36,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113862896] [2022-11-20 10:51:36,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113862896] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:36,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136762796] [2022-11-20 10:51:36,229 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:51:36,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:36,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:36,231 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:36,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-11-20 10:51:36,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:51:36,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:36,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-20 10:51:36,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:36,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 465 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:36,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:37,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 465 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:37,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136762796] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:37,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:37,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 36 [2022-11-20 10:51:37,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724039892] [2022-11-20 10:51:37,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:37,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-20 10:51:37,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:37,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-20 10:51:37,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=724, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 10:51:37,479 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:38,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:38,124 INFO L93 Difference]: Finished difference Result 136 states and 137 transitions. [2022-11-20 10:51:38,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-20 10:51:38,125 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2022-11-20 10:51:38,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:38,126 INFO L225 Difference]: With dead ends: 136 [2022-11-20 10:51:38,126 INFO L226 Difference]: Without dead ends: 134 [2022-11-20 10:51:38,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 215 SyntacticMatches, 60 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2124 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1656, Invalid=2900, Unknown=0, NotChecked=0, Total=4556 [2022-11-20 10:51:38,127 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 258 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:38,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 28 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:51:38,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-20 10:51:38,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 128. [2022-11-20 10:51:38,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.015748031496063) internal successors, (129), 127 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:38,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2022-11-20 10:51:38,154 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 124 [2022-11-20 10:51:38,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:38,154 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2022-11-20 10:51:38,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:38,155 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2022-11-20 10:51:38,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-20 10:51:38,155 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:38,156 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:38,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:38,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-11-20 10:51:38,361 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:38,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:38,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1023213391, now seen corresponding path program 59 times [2022-11-20 10:51:38,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:38,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987702895] [2022-11-20 10:51:38,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:38,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:38,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:40,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:40,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:40,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987702895] [2022-11-20 10:51:40,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987702895] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:40,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835035778] [2022-11-20 10:51:40,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:51:40,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:40,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:40,056 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:40,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-11-20 10:51:40,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2022-11-20 10:51:40,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:40,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-20 10:51:40,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:40,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:40,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:41,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:41,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835035778] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:41,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:41,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 66 [2022-11-20 10:51:41,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336559682] [2022-11-20 10:51:41,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:41,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 10:51:41,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:41,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 10:51:41,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1090, Invalid=3200, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 10:51:41,757 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand has 66 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:42,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:42,922 INFO L93 Difference]: Finished difference Result 226 states and 228 transitions. [2022-11-20 10:51:42,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-20 10:51:42,923 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2022-11-20 10:51:42,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:42,924 INFO L225 Difference]: With dead ends: 226 [2022-11-20 10:51:42,924 INFO L226 Difference]: Without dead ends: 129 [2022-11-20 10:51:42,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 190 SyntacticMatches, 63 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3616 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2210, Invalid=7296, Unknown=0, NotChecked=0, Total=9506 [2022-11-20 10:51:42,925 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 9 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:42,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 292 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:51:42,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-20 10:51:42,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-11-20 10:51:42,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:42,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2022-11-20 10:51:42,967 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 127 [2022-11-20 10:51:42,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:42,967 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2022-11-20 10:51:42,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:42,967 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2022-11-20 10:51:42,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-20 10:51:42,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:42,968 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:42,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:43,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:43,174 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:43,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:43,174 INFO L85 PathProgramCache]: Analyzing trace with hash 722145772, now seen corresponding path program 60 times [2022-11-20 10:51:43,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:43,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973236035] [2022-11-20 10:51:43,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:43,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:43,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:44,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 465 proven. 1396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:44,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:44,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973236035] [2022-11-20 10:51:44,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973236035] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:44,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883370110] [2022-11-20 10:51:44,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:51:44,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:44,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:44,199 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:44,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-11-20 10:51:44,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-11-20 10:51:44,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:44,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-20 10:51:44,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:44,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 496 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:44,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:45,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 496 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:45,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883370110] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:45,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:45,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 37 [2022-11-20 10:51:45,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821483455] [2022-11-20 10:51:45,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:45,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-20 10:51:45,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:45,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-20 10:51:45,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=763, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 10:51:45,674 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 37 states, 37 states have (on average 3.5675675675675675) internal successors, (132), 37 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:46,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:46,373 INFO L93 Difference]: Finished difference Result 140 states and 141 transitions. [2022-11-20 10:51:46,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-20 10:51:46,374 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.5675675675675675) internal successors, (132), 37 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2022-11-20 10:51:46,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:46,375 INFO L225 Difference]: With dead ends: 140 [2022-11-20 10:51:46,375 INFO L226 Difference]: Without dead ends: 138 [2022-11-20 10:51:46,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 222 SyntacticMatches, 62 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2257 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1757, Invalid=3073, Unknown=0, NotChecked=0, Total=4830 [2022-11-20 10:51:46,376 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 206 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:46,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 23 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:51:46,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-11-20 10:51:46,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 132. [2022-11-20 10:51:46,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.015267175572519) internal successors, (133), 131 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:46,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2022-11-20 10:51:46,406 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 128 [2022-11-20 10:51:46,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:46,406 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2022-11-20 10:51:46,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.5675675675675675) internal successors, (132), 37 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:46,406 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2022-11-20 10:51:46,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-20 10:51:46,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:46,407 INFO L195 NwaCegarLoop]: trace histogram [32, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:46,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-11-20 10:51:46,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:46,608 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:46,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:46,608 INFO L85 PathProgramCache]: Analyzing trace with hash -41671731, now seen corresponding path program 61 times [2022-11-20 10:51:46,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:46,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658712510] [2022-11-20 10:51:46,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:46,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:46,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:48,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:48,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:48,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658712510] [2022-11-20 10:51:48,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658712510] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:48,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093851407] [2022-11-20 10:51:48,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:51:48,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:48,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:48,404 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:48,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-11-20 10:51:48,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:48,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-20 10:51:48,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:48,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:48,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:50,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:50,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093851407] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:50,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:50,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 68 [2022-11-20 10:51:50,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264400174] [2022-11-20 10:51:50,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:50,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-20 10:51:50,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:50,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-20 10:51:50,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1157, Invalid=3399, Unknown=0, NotChecked=0, Total=4556 [2022-11-20 10:51:50,175 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand has 68 states, 68 states have (on average 1.9558823529411764) internal successors, (133), 68 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:51,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:51,395 INFO L93 Difference]: Finished difference Result 233 states and 235 transitions. [2022-11-20 10:51:51,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-20 10:51:51,395 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.9558823529411764) internal successors, (133), 68 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2022-11-20 10:51:51,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:51,396 INFO L225 Difference]: With dead ends: 233 [2022-11-20 10:51:51,396 INFO L226 Difference]: Without dead ends: 133 [2022-11-20 10:51:51,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 196 SyntacticMatches, 65 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3845 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2345, Invalid=7755, Unknown=0, NotChecked=0, Total=10100 [2022-11-20 10:51:51,398 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 9 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:51,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 261 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:51:51,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-20 10:51:51,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-11-20 10:51:51,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 132 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:51,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2022-11-20 10:51:51,436 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 131 [2022-11-20 10:51:51,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:51,437 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2022-11-20 10:51:51,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.9558823529411764) internal successors, (133), 68 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:51,437 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2022-11-20 10:51:51,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-20 10:51:51,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:51,438 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:51,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:51,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:51,639 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:51,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:51,639 INFO L85 PathProgramCache]: Analyzing trace with hash 341516168, now seen corresponding path program 62 times [2022-11-20 10:51:51,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:51,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987336266] [2022-11-20 10:51:51,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:51,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:51,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:52,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 496 proven. 1489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:52,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:52,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987336266] [2022-11-20 10:51:52,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987336266] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:52,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500469865] [2022-11-20 10:51:52,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:51:52,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:52,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:52,919 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:52,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-11-20 10:51:53,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:51:53,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:53,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-20 10:51:53,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:53,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 528 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:53,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:54,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 528 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:54,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500469865] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:54,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:54,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 38 [2022-11-20 10:51:54,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244107163] [2022-11-20 10:51:54,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:54,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-20 10:51:54,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:54,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-20 10:51:54,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=803, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 10:51:54,257 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 38 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 38 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:54,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:54,917 INFO L93 Difference]: Finished difference Result 144 states and 145 transitions. [2022-11-20 10:51:54,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-20 10:51:54,918 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 38 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2022-11-20 10:51:54,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:54,919 INFO L225 Difference]: With dead ends: 144 [2022-11-20 10:51:54,919 INFO L226 Difference]: Without dead ends: 142 [2022-11-20 10:51:54,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 229 SyntacticMatches, 64 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2394 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1861, Invalid=3251, Unknown=0, NotChecked=0, Total=5112 [2022-11-20 10:51:54,920 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 208 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:54,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 32 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:51:54,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-11-20 10:51:54,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 136. [2022-11-20 10:51:54,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 135 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:54,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2022-11-20 10:51:54,963 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 132 [2022-11-20 10:51:54,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:54,964 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2022-11-20 10:51:54,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 38 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:54,964 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2022-11-20 10:51:54,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-20 10:51:54,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:54,965 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:54,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:55,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:55,171 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:55,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:55,171 INFO L85 PathProgramCache]: Analyzing trace with hash -664543055, now seen corresponding path program 63 times [2022-11-20 10:51:55,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:55,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982305704] [2022-11-20 10:51:55,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:55,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:55,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:57,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1552 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:57,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:57,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982305704] [2022-11-20 10:51:57,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982305704] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:57,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663099570] [2022-11-20 10:51:57,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:51:57,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:57,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:57,390 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:57,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-11-20 10:51:57,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2022-11-20 10:51:57,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:57,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-20 10:51:57,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:57,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1552 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:57,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:59,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1552 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:59,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663099570] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:59,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:59,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 70 [2022-11-20 10:51:59,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785807520] [2022-11-20 10:51:59,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:59,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-20 10:51:59,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:59,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-20 10:51:59,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1226, Invalid=3604, Unknown=0, NotChecked=0, Total=4830 [2022-11-20 10:51:59,324 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand has 70 states, 70 states have (on average 1.957142857142857) internal successors, (137), 70 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:00,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:00,659 INFO L93 Difference]: Finished difference Result 240 states and 242 transitions. [2022-11-20 10:52:00,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-20 10:52:00,660 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.957142857142857) internal successors, (137), 70 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2022-11-20 10:52:00,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:00,661 INFO L225 Difference]: With dead ends: 240 [2022-11-20 10:52:00,661 INFO L226 Difference]: Without dead ends: 137 [2022-11-20 10:52:00,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 202 SyntacticMatches, 67 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4081 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2484, Invalid=8228, Unknown=0, NotChecked=0, Total=10712 [2022-11-20 10:52:00,663 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 9 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:00,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 253 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:52:00,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-20 10:52:00,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-11-20 10:52:00,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:00,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2022-11-20 10:52:00,691 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 135 [2022-11-20 10:52:00,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:00,691 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2022-11-20 10:52:00,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.957142857142857) internal successors, (137), 70 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:00,691 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2022-11-20 10:52:00,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-20 10:52:00,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:00,692 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:00,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-11-20 10:52:00,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:52:00,895 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:52:00,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:00,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1871742700, now seen corresponding path program 64 times [2022-11-20 10:52:00,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:52:00,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189202575] [2022-11-20 10:52:00,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:52:00,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:52:00,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:52:01,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 528 proven. 1585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:01,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:52:01,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189202575] [2022-11-20 10:52:01,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189202575] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:52:01,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673095592] [2022-11-20 10:52:01,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:52:01,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:52:01,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:52:01,960 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:52:01,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-11-20 10:52:02,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:52:02,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:52:02,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-20 10:52:02,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:02,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 561 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:02,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:52:03,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 561 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:03,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673095592] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:52:03,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:52:03,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 39 [2022-11-20 10:52:03,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921862229] [2022-11-20 10:52:03,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:52:03,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-20 10:52:03,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:52:03,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-20 10:52:03,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=638, Invalid=844, Unknown=0, NotChecked=0, Total=1482 [2022-11-20 10:52:03,425 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand has 39 states, 39 states have (on average 3.58974358974359) internal successors, (140), 39 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:04,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:04,150 INFO L93 Difference]: Finished difference Result 148 states and 149 transitions. [2022-11-20 10:52:04,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-11-20 10:52:04,150 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.58974358974359) internal successors, (140), 39 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2022-11-20 10:52:04,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:04,151 INFO L225 Difference]: With dead ends: 148 [2022-11-20 10:52:04,151 INFO L226 Difference]: Without dead ends: 146 [2022-11-20 10:52:04,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 236 SyntacticMatches, 66 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2535 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1968, Invalid=3434, Unknown=0, NotChecked=0, Total=5402 [2022-11-20 10:52:04,153 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 210 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:04,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 33 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:52:04,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-20 10:52:04,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 140. [2022-11-20 10:52:04,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.014388489208633) internal successors, (141), 139 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:04,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2022-11-20 10:52:04,184 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 136 [2022-11-20 10:52:04,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:04,185 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2022-11-20 10:52:04,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.58974358974359) internal successors, (140), 39 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:04,185 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2022-11-20 10:52:04,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-20 10:52:04,186 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:04,186 INFO L195 NwaCegarLoop]: trace histogram [34, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:04,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-11-20 10:52:04,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:52:04,392 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:52:04,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:04,393 INFO L85 PathProgramCache]: Analyzing trace with hash -468807987, now seen corresponding path program 65 times [2022-11-20 10:52:04,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:52:04,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300999954] [2022-11-20 10:52:04,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:52:04,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:52:04,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:52:06,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:06,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:52:06,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300999954] [2022-11-20 10:52:06,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300999954] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:52:06,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394285982] [2022-11-20 10:52:06,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:52:06,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:52:06,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:52:06,512 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:52:06,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-11-20 10:52:06,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2022-11-20 10:52:06,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:52:06,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-20 10:52:06,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:06,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:06,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:52:08,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:08,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394285982] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:52:08,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:52:08,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 72 [2022-11-20 10:52:08,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111936156] [2022-11-20 10:52:08,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:52:08,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-20 10:52:08,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:52:08,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-20 10:52:08,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1297, Invalid=3815, Unknown=0, NotChecked=0, Total=5112 [2022-11-20 10:52:08,546 INFO L87 Difference]: Start difference. First operand 140 states and 141 transitions. Second operand has 72 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 72 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:09,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:09,847 INFO L93 Difference]: Finished difference Result 247 states and 249 transitions. [2022-11-20 10:52:09,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-20 10:52:09,847 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 72 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2022-11-20 10:52:09,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:09,848 INFO L225 Difference]: With dead ends: 247 [2022-11-20 10:52:09,848 INFO L226 Difference]: Without dead ends: 141 [2022-11-20 10:52:09,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 208 SyntacticMatches, 69 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4324 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2627, Invalid=8715, Unknown=0, NotChecked=0, Total=11342 [2022-11-20 10:52:09,849 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:09,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 227 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:52:09,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-20 10:52:09,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-11-20 10:52:09,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:09,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2022-11-20 10:52:09,879 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 139 [2022-11-20 10:52:09,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:09,879 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2022-11-20 10:52:09,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 72 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:09,879 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2022-11-20 10:52:09,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-20 10:52:09,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:09,880 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:09,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-11-20 10:52:10,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-11-20 10:52:10,081 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:52:10,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:10,081 INFO L85 PathProgramCache]: Analyzing trace with hash 733454216, now seen corresponding path program 66 times [2022-11-20 10:52:10,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:52:10,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801834415] [2022-11-20 10:52:10,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:52:10,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:52:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:52:11,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 561 proven. 1684 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:11,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:52:11,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801834415] [2022-11-20 10:52:11,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801834415] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:52:11,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799006527] [2022-11-20 10:52:11,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:52:11,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:52:11,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:52:11,328 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:52:11,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-11-20 10:52:11,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2022-11-20 10:52:11,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:52:11,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-20 10:52:11,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:11,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 595 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:11,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:52:12,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 595 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:12,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799006527] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:52:12,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:52:12,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 40 [2022-11-20 10:52:12,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002699290] [2022-11-20 10:52:12,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:52:12,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-20 10:52:12,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:52:12,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-20 10:52:12,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=886, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 10:52:12,929 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 40 states, 40 states have (on average 3.6) internal successors, (144), 40 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:13,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:13,670 INFO L93 Difference]: Finished difference Result 152 states and 153 transitions. [2022-11-20 10:52:13,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-11-20 10:52:13,671 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.6) internal successors, (144), 40 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2022-11-20 10:52:13,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:13,672 INFO L225 Difference]: With dead ends: 152 [2022-11-20 10:52:13,672 INFO L226 Difference]: Without dead ends: 150 [2022-11-20 10:52:13,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 243 SyntacticMatches, 68 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2680 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2078, Invalid=3622, Unknown=0, NotChecked=0, Total=5700 [2022-11-20 10:52:13,673 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 222 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:13,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 36 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:52:13,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-20 10:52:13,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 144. [2022-11-20 10:52:13,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.013986013986014) internal successors, (145), 143 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:13,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2022-11-20 10:52:13,716 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 140 [2022-11-20 10:52:13,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:13,716 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2022-11-20 10:52:13,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.6) internal successors, (144), 40 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:13,716 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2022-11-20 10:52:13,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-20 10:52:13,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:13,717 INFO L195 NwaCegarLoop]: trace histogram [35, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:13,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-11-20 10:52:13,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:52:13,923 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:52:13,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:13,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1840734385, now seen corresponding path program 67 times [2022-11-20 10:52:13,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:52:13,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927183105] [2022-11-20 10:52:13,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:52:13,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:52:13,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:52:16,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:16,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:52:16,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927183105] [2022-11-20 10:52:16,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927183105] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:52:16,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875981070] [2022-11-20 10:52:16,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:52:16,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:52:16,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:52:16,089 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:52:16,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-11-20 10:52:16,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:52:16,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-20 10:52:16,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:16,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:16,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:52:18,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:18,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875981070] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:52:18,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:52:18,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 74 [2022-11-20 10:52:18,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284471483] [2022-11-20 10:52:18,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:52:18,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-20 10:52:18,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:52:18,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-20 10:52:18,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1370, Invalid=4032, Unknown=0, NotChecked=0, Total=5402 [2022-11-20 10:52:18,290 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand has 74 states, 74 states have (on average 1.9594594594594594) internal successors, (145), 74 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:19,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:19,710 INFO L93 Difference]: Finished difference Result 254 states and 256 transitions. [2022-11-20 10:52:19,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-11-20 10:52:19,710 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.9594594594594594) internal successors, (145), 74 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2022-11-20 10:52:19,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:19,711 INFO L225 Difference]: With dead ends: 254 [2022-11-20 10:52:19,711 INFO L226 Difference]: Without dead ends: 145 [2022-11-20 10:52:19,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 214 SyntacticMatches, 71 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4574 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2774, Invalid=9216, Unknown=0, NotChecked=0, Total=11990 [2022-11-20 10:52:19,712 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 9 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:19,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 283 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:52:19,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-11-20 10:52:19,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-11-20 10:52:19,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:19,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2022-11-20 10:52:19,760 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 143 [2022-11-20 10:52:19,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:19,760 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2022-11-20 10:52:19,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.9594594594594594) internal successors, (145), 74 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:19,761 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2022-11-20 10:52:19,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-20 10:52:19,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:19,762 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:19,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-11-20 10:52:19,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-11-20 10:52:19,968 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:52:19,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:19,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1532781588, now seen corresponding path program 68 times [2022-11-20 10:52:19,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:52:19,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224297284] [2022-11-20 10:52:19,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:52:19,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:52:20,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:52:21,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 595 proven. 1786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:21,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:52:21,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224297284] [2022-11-20 10:52:21,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224297284] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:52:21,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624894140] [2022-11-20 10:52:21,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:52:21,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:52:21,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:52:21,223 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:52:21,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-11-20 10:52:21,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:52:21,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:52:21,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-20 10:52:21,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:21,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 630 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:21,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:52:22,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 630 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:22,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624894140] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:52:22,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:52:22,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 41 [2022-11-20 10:52:22,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410113201] [2022-11-20 10:52:22,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:52:22,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-20 10:52:22,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:52:22,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-20 10:52:22,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=929, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 10:52:22,845 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 41 states, 41 states have (on average 3.6097560975609757) internal successors, (148), 41 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:23,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:23,632 INFO L93 Difference]: Finished difference Result 156 states and 157 transitions. [2022-11-20 10:52:23,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-11-20 10:52:23,632 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.6097560975609757) internal successors, (148), 41 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2022-11-20 10:52:23,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:23,634 INFO L225 Difference]: With dead ends: 156 [2022-11-20 10:52:23,634 INFO L226 Difference]: Without dead ends: 154 [2022-11-20 10:52:23,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 250 SyntacticMatches, 70 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2829 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2191, Invalid=3815, Unknown=0, NotChecked=0, Total=6006 [2022-11-20 10:52:23,634 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 226 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:23,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 37 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:52:23,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-20 10:52:23,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 148. [2022-11-20 10:52:23,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0136054421768708) internal successors, (149), 147 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:23,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2022-11-20 10:52:23,682 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 144 [2022-11-20 10:52:23,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:23,682 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2022-11-20 10:52:23,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.6097560975609757) internal successors, (148), 41 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:23,683 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2022-11-20 10:52:23,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-20 10:52:23,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:23,684 INFO L195 NwaCegarLoop]: trace histogram [36, 35, 35, 35, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:23,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-11-20 10:52:23,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-11-20 10:52:23,890 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:52:23,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:23,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1000823245, now seen corresponding path program 69 times [2022-11-20 10:52:23,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:52:23,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604523909] [2022-11-20 10:52:23,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:52:23,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:52:23,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:52:26,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1855 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:26,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:52:26,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604523909] [2022-11-20 10:52:26,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604523909] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:52:26,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692310754] [2022-11-20 10:52:26,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:52:26,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:52:26,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:52:26,201 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:52:26,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-11-20 10:52:26,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2022-11-20 10:52:26,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:52:26,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-20 10:52:26,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:26,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1855 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:26,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:52:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1855 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:28,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692310754] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:52:28,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:52:28,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 75] total 76 [2022-11-20 10:52:28,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169884930] [2022-11-20 10:52:28,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:52:28,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-20 10:52:28,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:52:28,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-20 10:52:28,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1445, Invalid=4255, Unknown=0, NotChecked=0, Total=5700 [2022-11-20 10:52:28,509 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand has 76 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 76 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:30,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:30,079 INFO L93 Difference]: Finished difference Result 261 states and 263 transitions. [2022-11-20 10:52:30,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-11-20 10:52:30,079 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 76 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2022-11-20 10:52:30,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:30,080 INFO L225 Difference]: With dead ends: 261 [2022-11-20 10:52:30,080 INFO L226 Difference]: Without dead ends: 149 [2022-11-20 10:52:30,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 220 SyntacticMatches, 73 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4831 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2925, Invalid=9731, Unknown=0, NotChecked=0, Total=12656 [2022-11-20 10:52:30,082 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:30,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 408 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:52:30,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-11-20 10:52:30,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-11-20 10:52:30,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:30,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2022-11-20 10:52:30,117 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 147 [2022-11-20 10:52:30,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:30,117 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2022-11-20 10:52:30,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 76 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:30,117 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2022-11-20 10:52:30,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-20 10:52:30,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:30,118 INFO L195 NwaCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:30,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-11-20 10:52:30,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:52:30,318 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:52:30,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:30,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1597865864, now seen corresponding path program 70 times [2022-11-20 10:52:30,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:52:30,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742052670] [2022-11-20 10:52:30,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:52:30,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:52:30,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:52:31,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 630 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:31,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:52:31,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742052670] [2022-11-20 10:52:31,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742052670] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:52:31,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802076136] [2022-11-20 10:52:31,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:52:31,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:52:31,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:52:31,567 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:52:31,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-11-20 10:52:31,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:52:31,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:52:31,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-20 10:52:31,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:31,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 666 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:31,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:52:33,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 666 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:33,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802076136] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:52:33,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:52:33,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 42 [2022-11-20 10:52:33,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431336174] [2022-11-20 10:52:33,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:52:33,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-20 10:52:33,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:52:33,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-20 10:52:33,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=973, Unknown=0, NotChecked=0, Total=1722 [2022-11-20 10:52:33,180 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 42 states, 42 states have (on average 3.619047619047619) internal successors, (152), 42 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:33,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:33,978 INFO L93 Difference]: Finished difference Result 160 states and 161 transitions. [2022-11-20 10:52:33,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-11-20 10:52:33,978 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.619047619047619) internal successors, (152), 42 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2022-11-20 10:52:33,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:33,979 INFO L225 Difference]: With dead ends: 160 [2022-11-20 10:52:33,980 INFO L226 Difference]: Without dead ends: 158 [2022-11-20 10:52:33,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 257 SyntacticMatches, 72 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2982 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2307, Invalid=4013, Unknown=0, NotChecked=0, Total=6320 [2022-11-20 10:52:33,981 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 308 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:33,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 31 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:52:33,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-20 10:52:34,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 152. [2022-11-20 10:52:34,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0132450331125828) internal successors, (153), 151 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:34,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2022-11-20 10:52:34,014 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 148 [2022-11-20 10:52:34,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:34,014 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2022-11-20 10:52:34,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.619047619047619) internal successors, (152), 42 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:34,014 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2022-11-20 10:52:34,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-20 10:52:34,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:34,015 INFO L195 NwaCegarLoop]: trace histogram [37, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:34,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-11-20 10:52:34,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:52:34,216 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:52:34,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:34,216 INFO L85 PathProgramCache]: Analyzing trace with hash 904233137, now seen corresponding path program 71 times [2022-11-20 10:52:34,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:52:34,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549102779] [2022-11-20 10:52:34,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:52:34,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:52:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:52:36,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1962 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:36,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:52:36,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549102779] [2022-11-20 10:52:36,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549102779] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:52:36,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211243465] [2022-11-20 10:52:36,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:52:36,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:52:36,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:52:36,695 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:52:36,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-11-20 10:52:36,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2022-11-20 10:52:36,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:52:36,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-20 10:52:36,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:37,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1962 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:37,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:52:39,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1962 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:39,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211243465] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:52:39,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:52:39,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77, 77] total 78 [2022-11-20 10:52:39,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140406164] [2022-11-20 10:52:39,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:52:39,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-11-20 10:52:39,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:52:39,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-11-20 10:52:39,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1522, Invalid=4484, Unknown=0, NotChecked=0, Total=6006 [2022-11-20 10:52:39,096 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand has 78 states, 78 states have (on average 1.9615384615384615) internal successors, (153), 78 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:40,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:40,660 INFO L93 Difference]: Finished difference Result 268 states and 270 transitions. [2022-11-20 10:52:40,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-11-20 10:52:40,661 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.9615384615384615) internal successors, (153), 78 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2022-11-20 10:52:40,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:40,661 INFO L225 Difference]: With dead ends: 268 [2022-11-20 10:52:40,661 INFO L226 Difference]: Without dead ends: 153 [2022-11-20 10:52:40,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 226 SyntacticMatches, 75 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5095 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3080, Invalid=10260, Unknown=0, NotChecked=0, Total=13340 [2022-11-20 10:52:40,662 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 9 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:40,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 299 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:52:40,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-11-20 10:52:40,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-11-20 10:52:40,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.013157894736842) internal successors, (154), 152 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:40,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2022-11-20 10:52:40,717 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 151 [2022-11-20 10:52:40,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:40,717 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2022-11-20 10:52:40,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.9615384615384615) internal successors, (153), 78 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:40,717 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2022-11-20 10:52:40,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-20 10:52:40,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:40,718 INFO L195 NwaCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:40,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-11-20 10:52:40,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-11-20 10:52:40,919 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:52:40,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:40,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1305718548, now seen corresponding path program 72 times [2022-11-20 10:52:40,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:52:40,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284627992] [2022-11-20 10:52:40,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:52:40,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:52:40,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:52:42,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 666 proven. 1999 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:42,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:52:42,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284627992] [2022-11-20 10:52:42,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284627992] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:52:42,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122769673] [2022-11-20 10:52:42,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:52:42,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:52:42,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:52:42,246 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:52:42,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-11-20 10:52:42,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2022-11-20 10:52:42,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:52:42,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-20 10:52:42,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:42,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 703 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:42,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:52:44,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 703 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:44,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122769673] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:52:44,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:52:44,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 43 [2022-11-20 10:52:44,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301850110] [2022-11-20 10:52:44,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:52:44,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-20 10:52:44,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:52:44,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-20 10:52:44,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=788, Invalid=1018, Unknown=0, NotChecked=0, Total=1806 [2022-11-20 10:52:44,048 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand has 43 states, 43 states have (on average 3.627906976744186) internal successors, (156), 43 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:44,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:44,909 INFO L93 Difference]: Finished difference Result 164 states and 165 transitions. [2022-11-20 10:52:44,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-11-20 10:52:44,909 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.627906976744186) internal successors, (156), 43 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-20 10:52:44,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:44,910 INFO L225 Difference]: With dead ends: 164 [2022-11-20 10:52:44,910 INFO L226 Difference]: Without dead ends: 162 [2022-11-20 10:52:44,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 264 SyntacticMatches, 74 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3139 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2426, Invalid=4216, Unknown=0, NotChecked=0, Total=6642 [2022-11-20 10:52:44,912 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 308 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:44,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 29 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:52:44,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-11-20 10:52:44,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 156. [2022-11-20 10:52:44,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.0129032258064516) internal successors, (157), 155 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:44,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2022-11-20 10:52:44,966 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 152 [2022-11-20 10:52:44,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:44,966 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2022-11-20 10:52:44,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.627906976744186) internal successors, (156), 43 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:44,966 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2022-11-20 10:52:44,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-20 10:52:44,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:44,967 INFO L195 NwaCegarLoop]: trace histogram [38, 37, 37, 37, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:44,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-11-20 10:52:45,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:52:45,174 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:52:45,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:45,174 INFO L85 PathProgramCache]: Analyzing trace with hash 862356685, now seen corresponding path program 73 times [2022-11-20 10:52:45,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:52:45,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583310218] [2022-11-20 10:52:45,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:52:45,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:52:45,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:52:47,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 2072 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:47,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:52:47,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583310218] [2022-11-20 10:52:47,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583310218] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:52:47,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738289415] [2022-11-20 10:52:47,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:52:47,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:52:47,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:52:47,687 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:52:47,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-11-20 10:52:47,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:52:47,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-20 10:52:47,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:48,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 2072 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:48,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:52:50,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 2072 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:50,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738289415] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:52:50,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:52:50,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79, 79] total 80 [2022-11-20 10:52:50,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925580282] [2022-11-20 10:52:50,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:52:50,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-11-20 10:52:50,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:52:50,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-11-20 10:52:50,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1601, Invalid=4719, Unknown=0, NotChecked=0, Total=6320 [2022-11-20 10:52:50,100 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand has 80 states, 80 states have (on average 1.9625) internal successors, (157), 80 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:51,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:51,749 INFO L93 Difference]: Finished difference Result 275 states and 277 transitions. [2022-11-20 10:52:51,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-11-20 10:52:51,749 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.9625) internal successors, (157), 80 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2022-11-20 10:52:51,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:51,750 INFO L225 Difference]: With dead ends: 275 [2022-11-20 10:52:51,750 INFO L226 Difference]: Without dead ends: 157 [2022-11-20 10:52:51,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 232 SyntacticMatches, 77 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5366 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3239, Invalid=10803, Unknown=0, NotChecked=0, Total=14042 [2022-11-20 10:52:51,751 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 9 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:51,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 278 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:52:51,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-11-20 10:52:51,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2022-11-20 10:52:51,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0128205128205128) internal successors, (158), 156 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:51,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2022-11-20 10:52:51,809 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 155 [2022-11-20 10:52:51,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:51,809 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2022-11-20 10:52:51,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.9625) internal successors, (157), 80 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:51,810 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2022-11-20 10:52:51,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-20 10:52:51,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:51,811 INFO L195 NwaCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:51,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-11-20 10:52:52,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:52:52,017 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:52:52,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:52,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1828405368, now seen corresponding path program 74 times [2022-11-20 10:52:52,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:52:52,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002699746] [2022-11-20 10:52:52,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:52:52,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:52:52,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:52:53,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 703 proven. 2110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:53,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:52:53,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002699746] [2022-11-20 10:52:53,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002699746] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:52:53,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712628746] [2022-11-20 10:52:53,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:52:53,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:52:53,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:52:53,475 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:52:53,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-11-20 10:52:53,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:52:53,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:52:53,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-20 10:52:53,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:53,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 741 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:53,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:52:55,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 741 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:55,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712628746] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:52:55,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:52:55,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 44 [2022-11-20 10:52:55,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199884502] [2022-11-20 10:52:55,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:52:55,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-20 10:52:55,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:52:55,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-20 10:52:55,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=828, Invalid=1064, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 10:52:55,308 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 44 states, 44 states have (on average 3.6363636363636362) internal successors, (160), 44 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:56,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:56,190 INFO L93 Difference]: Finished difference Result 168 states and 169 transitions. [2022-11-20 10:52:56,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-11-20 10:52:56,191 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.6363636363636362) internal successors, (160), 44 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2022-11-20 10:52:56,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:56,192 INFO L225 Difference]: With dead ends: 168 [2022-11-20 10:52:56,192 INFO L226 Difference]: Without dead ends: 166 [2022-11-20 10:52:56,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 271 SyntacticMatches, 76 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3300 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2548, Invalid=4424, Unknown=0, NotChecked=0, Total=6972 [2022-11-20 10:52:56,193 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 244 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:56,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 36 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:52:56,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-11-20 10:52:56,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2022-11-20 10:52:56,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.0125786163522013) internal successors, (161), 159 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:56,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2022-11-20 10:52:56,240 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 156 [2022-11-20 10:52:56,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:56,240 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2022-11-20 10:52:56,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.6363636363636362) internal successors, (160), 44 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:56,240 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2022-11-20 10:52:56,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-20 10:52:56,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:56,241 INFO L195 NwaCegarLoop]: trace histogram [39, 38, 38, 38, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:56,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-11-20 10:52:56,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-11-20 10:52:56,447 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:52:56,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:56,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1244249935, now seen corresponding path program 75 times [2022-11-20 10:52:56,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:52:56,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111661023] [2022-11-20 10:52:56,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:52:56,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:52:56,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:52:59,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 2185 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:59,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:52:59,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111661023] [2022-11-20 10:52:59,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111661023] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:52:59,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789988542] [2022-11-20 10:52:59,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:52:59,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:52:59,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:52:59,110 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:52:59,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-11-20 10:52:59,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2022-11-20 10:52:59,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:52:59,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-20 10:52:59,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:59,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 2185 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:59,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:53:01,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 2185 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:01,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789988542] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:53:01,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:53:01,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81, 81] total 82 [2022-11-20 10:53:01,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632337598] [2022-11-20 10:53:01,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:53:01,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-11-20 10:53:01,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:01,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-11-20 10:53:01,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1682, Invalid=4960, Unknown=0, NotChecked=0, Total=6642 [2022-11-20 10:53:01,887 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand has 82 states, 82 states have (on average 1.9634146341463414) internal successors, (161), 82 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:03,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:03,572 INFO L93 Difference]: Finished difference Result 282 states and 284 transitions. [2022-11-20 10:53:03,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-11-20 10:53:03,572 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.9634146341463414) internal successors, (161), 82 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2022-11-20 10:53:03,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:03,573 INFO L225 Difference]: With dead ends: 282 [2022-11-20 10:53:03,573 INFO L226 Difference]: Without dead ends: 161 [2022-11-20 10:53:03,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 238 SyntacticMatches, 79 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5644 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=3402, Invalid=11360, Unknown=0, NotChecked=0, Total=14762 [2022-11-20 10:53:03,574 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 9 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:03,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 284 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:53:03,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-20 10:53:03,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-11-20 10:53:03,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.0125) internal successors, (162), 160 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:03,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2022-11-20 10:53:03,619 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 159 [2022-11-20 10:53:03,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:03,619 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2022-11-20 10:53:03,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.9634146341463414) internal successors, (161), 82 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:03,619 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2022-11-20 10:53:03,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-20 10:53:03,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:03,620 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:03,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-11-20 10:53:03,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-11-20 10:53:03,826 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:53:03,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:03,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1376953836, now seen corresponding path program 76 times [2022-11-20 10:53:03,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:03,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481714745] [2022-11-20 10:53:03,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:03,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:03,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:05,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 741 proven. 2224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:05,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:05,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481714745] [2022-11-20 10:53:05,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481714745] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:53:05,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925632214] [2022-11-20 10:53:05,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:53:05,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:05,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:53:05,310 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:53:05,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-11-20 10:53:05,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:53:05,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:53:05,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-20 10:53:05,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:05,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 780 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:05,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:53:07,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 780 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:07,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925632214] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:53:07,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:53:07,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 45 [2022-11-20 10:53:07,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066364188] [2022-11-20 10:53:07,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:53:07,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-20 10:53:07,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:07,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-20 10:53:07,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=869, Invalid=1111, Unknown=0, NotChecked=0, Total=1980 [2022-11-20 10:53:07,308 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand has 45 states, 45 states have (on average 3.6444444444444444) internal successors, (164), 45 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:08,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:08,226 INFO L93 Difference]: Finished difference Result 172 states and 173 transitions. [2022-11-20 10:53:08,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-11-20 10:53:08,227 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.6444444444444444) internal successors, (164), 45 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-11-20 10:53:08,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:08,228 INFO L225 Difference]: With dead ends: 172 [2022-11-20 10:53:08,228 INFO L226 Difference]: Without dead ends: 170 [2022-11-20 10:53:08,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 278 SyntacticMatches, 78 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3465 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2673, Invalid=4637, Unknown=0, NotChecked=0, Total=7310 [2022-11-20 10:53:08,229 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 326 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:08,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 38 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:53:08,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-20 10:53:08,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 164. [2022-11-20 10:53:08,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.0122699386503067) internal successors, (165), 163 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:08,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2022-11-20 10:53:08,289 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 160 [2022-11-20 10:53:08,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:08,290 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2022-11-20 10:53:08,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.6444444444444444) internal successors, (164), 45 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:08,290 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2022-11-20 10:53:08,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-20 10:53:08,291 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:08,291 INFO L195 NwaCegarLoop]: trace histogram [40, 39, 39, 39, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:08,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-11-20 10:53:08,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-11-20 10:53:08,491 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:53:08,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:08,492 INFO L85 PathProgramCache]: Analyzing trace with hash -396095539, now seen corresponding path program 77 times [2022-11-20 10:53:08,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:08,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585509186] [2022-11-20 10:53:08,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:08,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:08,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:11,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 2301 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:11,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:11,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585509186] [2022-11-20 10:53:11,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585509186] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:53:11,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061968991] [2022-11-20 10:53:11,250 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:53:11,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:11,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:53:11,251 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:53:11,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-11-20 10:53:11,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2022-11-20 10:53:11,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:53:11,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-20 10:53:11,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:11,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 2301 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:11,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:53:13,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 2301 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:13,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061968991] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:53:13,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:53:13,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83, 83] total 84 [2022-11-20 10:53:13,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369239777] [2022-11-20 10:53:13,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:53:13,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-11-20 10:53:13,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:13,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-11-20 10:53:13,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1765, Invalid=5207, Unknown=0, NotChecked=0, Total=6972 [2022-11-20 10:53:13,927 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand has 84 states, 84 states have (on average 1.9642857142857142) internal successors, (165), 84 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:15,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:15,712 INFO L93 Difference]: Finished difference Result 289 states and 291 transitions. [2022-11-20 10:53:15,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-11-20 10:53:15,712 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.9642857142857142) internal successors, (165), 84 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2022-11-20 10:53:15,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:15,713 INFO L225 Difference]: With dead ends: 289 [2022-11-20 10:53:15,713 INFO L226 Difference]: Without dead ends: 165 [2022-11-20 10:53:15,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 244 SyntacticMatches, 81 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5929 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=3569, Invalid=11931, Unknown=0, NotChecked=0, Total=15500 [2022-11-20 10:53:15,714 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 9 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:15,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 268 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:53:15,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-20 10:53:15,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-11-20 10:53:15,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.0121951219512195) internal successors, (166), 164 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:15,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2022-11-20 10:53:15,776 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 163 [2022-11-20 10:53:15,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:15,776 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2022-11-20 10:53:15,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.9642857142857142) internal successors, (165), 84 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:15,776 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2022-11-20 10:53:15,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-11-20 10:53:15,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:15,777 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:15,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-11-20 10:53:15,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-11-20 10:53:15,984 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:53:15,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:15,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1725603960, now seen corresponding path program 78 times [2022-11-20 10:53:15,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:15,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254855598] [2022-11-20 10:53:15,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:15,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 780 proven. 2341 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:17,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:17,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254855598] [2022-11-20 10:53:17,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254855598] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:53:17,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101643316] [2022-11-20 10:53:17,556 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:53:17,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:17,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:53:17,557 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:53:17,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-11-20 10:53:17,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2022-11-20 10:53:17,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:53:17,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-20 10:53:17,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:18,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 820 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:18,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:53:19,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 820 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:19,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101643316] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:53:19,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:53:19,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 46 [2022-11-20 10:53:19,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180771733] [2022-11-20 10:53:19,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:53:19,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-20 10:53:19,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:19,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-20 10:53:19,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=911, Invalid=1159, Unknown=0, NotChecked=0, Total=2070 [2022-11-20 10:53:19,586 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand has 46 states, 46 states have (on average 3.652173913043478) internal successors, (168), 46 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:20,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:20,554 INFO L93 Difference]: Finished difference Result 176 states and 177 transitions. [2022-11-20 10:53:20,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-20 10:53:20,554 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.652173913043478) internal successors, (168), 46 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2022-11-20 10:53:20,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:20,555 INFO L225 Difference]: With dead ends: 176 [2022-11-20 10:53:20,555 INFO L226 Difference]: Without dead ends: 174 [2022-11-20 10:53:20,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 285 SyntacticMatches, 80 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3634 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2801, Invalid=4855, Unknown=0, NotChecked=0, Total=7656 [2022-11-20 10:53:20,555 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 250 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:20,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 35 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:53:20,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-20 10:53:20,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 168. [2022-11-20 10:53:20,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.0119760479041917) internal successors, (169), 167 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:20,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2022-11-20 10:53:20,620 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 164 [2022-11-20 10:53:20,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:20,620 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2022-11-20 10:53:20,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.652173913043478) internal successors, (168), 46 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:20,621 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2022-11-20 10:53:20,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-20 10:53:20,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:20,622 INFO L195 NwaCegarLoop]: trace histogram [41, 40, 40, 40, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:20,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-11-20 10:53:20,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-11-20 10:53:20,828 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:53:20,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:20,828 INFO L85 PathProgramCache]: Analyzing trace with hash -999186255, now seen corresponding path program 79 times [2022-11-20 10:53:20,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:20,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870503189] [2022-11-20 10:53:20,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:20,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:20,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:23,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 2420 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:23,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:23,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870503189] [2022-11-20 10:53:23,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870503189] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:53:23,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143682810] [2022-11-20 10:53:23,700 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:53:23,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:23,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:53:23,700 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:53:23,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-11-20 10:53:23,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:23,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-20 10:53:23,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:24,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 2420 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:24,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:53:26,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 2420 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:26,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143682810] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:53:26,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:53:26,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85, 85] total 86 [2022-11-20 10:53:26,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173304129] [2022-11-20 10:53:26,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:53:26,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-11-20 10:53:26,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:26,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-11-20 10:53:26,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1850, Invalid=5460, Unknown=0, NotChecked=0, Total=7310 [2022-11-20 10:53:26,367 INFO L87 Difference]: Start difference. First operand 168 states and 169 transitions. Second operand has 86 states, 86 states have (on average 1.9651162790697674) internal successors, (169), 86 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:28,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:28,185 INFO L93 Difference]: Finished difference Result 296 states and 298 transitions. [2022-11-20 10:53:28,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-11-20 10:53:28,185 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.9651162790697674) internal successors, (169), 86 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 167 [2022-11-20 10:53:28,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:28,186 INFO L225 Difference]: With dead ends: 296 [2022-11-20 10:53:28,186 INFO L226 Difference]: Without dead ends: 169 [2022-11-20 10:53:28,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 250 SyntacticMatches, 83 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6221 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=3740, Invalid=12516, Unknown=0, NotChecked=0, Total=16256 [2022-11-20 10:53:28,187 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 9 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:28,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 269 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:53:28,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-20 10:53:28,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-11-20 10:53:28,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.0119047619047619) internal successors, (170), 168 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:28,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2022-11-20 10:53:28,252 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 167 [2022-11-20 10:53:28,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:28,253 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2022-11-20 10:53:28,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.9651162790697674) internal successors, (169), 86 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:28,253 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2022-11-20 10:53:28,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-20 10:53:28,254 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:28,254 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 40, 40, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:28,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-11-20 10:53:28,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:28,461 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:53:28,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:28,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1874945300, now seen corresponding path program 80 times [2022-11-20 10:53:28,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:28,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250817757] [2022-11-20 10:53:28,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:28,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:28,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:30,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3281 backedges. 820 proven. 2461 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:30,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:30,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250817757] [2022-11-20 10:53:30,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250817757] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:53:30,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232544086] [2022-11-20 10:53:30,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:53:30,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:30,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:53:30,117 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:53:30,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-11-20 10:53:30,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:53:30,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:53:30,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-20 10:53:30,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:30,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3281 backedges. 861 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:30,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:53:32,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3281 backedges. 861 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:32,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232544086] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:53:32,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:53:32,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 47 [2022-11-20 10:53:32,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602521327] [2022-11-20 10:53:32,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:53:32,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-20 10:53:32,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:32,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-20 10:53:32,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=954, Invalid=1208, Unknown=0, NotChecked=0, Total=2162 [2022-11-20 10:53:32,291 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand has 47 states, 47 states have (on average 3.6595744680851063) internal successors, (172), 47 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:33,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:33,265 INFO L93 Difference]: Finished difference Result 180 states and 181 transitions. [2022-11-20 10:53:33,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-11-20 10:53:33,266 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.6595744680851063) internal successors, (172), 47 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2022-11-20 10:53:33,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:33,266 INFO L225 Difference]: With dead ends: 180 [2022-11-20 10:53:33,266 INFO L226 Difference]: Without dead ends: 178 [2022-11-20 10:53:33,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 292 SyntacticMatches, 82 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3807 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2932, Invalid=5078, Unknown=0, NotChecked=0, Total=8010 [2022-11-20 10:53:33,267 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 258 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:33,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 35 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:53:33,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-11-20 10:53:33,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 172. [2022-11-20 10:53:33,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.0116959064327486) internal successors, (173), 171 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:33,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2022-11-20 10:53:33,312 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 168 [2022-11-20 10:53:33,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:33,312 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2022-11-20 10:53:33,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.6595744680851063) internal successors, (172), 47 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:33,312 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2022-11-20 10:53:33,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-20 10:53:33,313 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:33,313 INFO L195 NwaCegarLoop]: trace histogram [42, 41, 41, 41, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:33,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-11-20 10:53:33,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:33,519 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:53:33,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:33,520 INFO L85 PathProgramCache]: Analyzing trace with hash -440927539, now seen corresponding path program 81 times [2022-11-20 10:53:33,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:33,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498668494] [2022-11-20 10:53:33,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:33,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:33,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:36,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 2542 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:36,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:36,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498668494] [2022-11-20 10:53:36,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498668494] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:53:36,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504133503] [2022-11-20 10:53:36,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:53:36,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:36,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:53:36,549 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:53:36,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-11-20 10:53:36,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2022-11-20 10:53:36,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:53:36,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-20 10:53:36,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:37,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 2542 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:37,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:53:39,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 2542 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:39,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504133503] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:53:39,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:53:39,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87, 87] total 88 [2022-11-20 10:53:39,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306887931] [2022-11-20 10:53:39,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:53:39,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-11-20 10:53:39,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:39,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-11-20 10:53:39,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1937, Invalid=5719, Unknown=0, NotChecked=0, Total=7656 [2022-11-20 10:53:39,514 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand has 88 states, 88 states have (on average 1.9659090909090908) internal successors, (173), 88 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:41,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:41,438 INFO L93 Difference]: Finished difference Result 303 states and 305 transitions. [2022-11-20 10:53:41,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-20 10:53:41,438 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.9659090909090908) internal successors, (173), 88 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 171 [2022-11-20 10:53:41,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:41,439 INFO L225 Difference]: With dead ends: 303 [2022-11-20 10:53:41,439 INFO L226 Difference]: Without dead ends: 173 [2022-11-20 10:53:41,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 256 SyntacticMatches, 85 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6520 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=3915, Invalid=13115, Unknown=0, NotChecked=0, Total=17030 [2022-11-20 10:53:41,440 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 9 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:41,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 336 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:53:41,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-11-20 10:53:41,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-11-20 10:53:41,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0116279069767442) internal successors, (174), 172 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:41,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2022-11-20 10:53:41,493 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 171 [2022-11-20 10:53:41,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:41,494 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2022-11-20 10:53:41,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.9659090909090908) internal successors, (173), 88 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:41,494 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2022-11-20 10:53:41,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-11-20 10:53:41,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:41,495 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:41,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-11-20 10:53:41,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:41,701 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:53:41,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:41,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1313382520, now seen corresponding path program 82 times [2022-11-20 10:53:41,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:41,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369255976] [2022-11-20 10:53:41,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:41,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:41,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:43,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3445 backedges. 861 proven. 2584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:43,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:43,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369255976] [2022-11-20 10:53:43,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369255976] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:53:43,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529648994] [2022-11-20 10:53:43,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:53:43,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:43,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:53:43,381 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:53:43,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-11-20 10:53:43,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:53:43,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:53:43,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-20 10:53:43,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:43,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3445 backedges. 903 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:43,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:53:45,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3445 backedges. 903 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:45,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529648994] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:53:45,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:53:45,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 48 [2022-11-20 10:53:45,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417185763] [2022-11-20 10:53:45,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:53:45,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-20 10:53:45,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:45,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-20 10:53:45,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=998, Invalid=1258, Unknown=0, NotChecked=0, Total=2256 [2022-11-20 10:53:45,525 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand has 48 states, 48 states have (on average 3.6666666666666665) internal successors, (176), 48 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:46,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:46,542 INFO L93 Difference]: Finished difference Result 184 states and 185 transitions. [2022-11-20 10:53:46,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-11-20 10:53:46,542 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.6666666666666665) internal successors, (176), 48 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 172 [2022-11-20 10:53:46,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:46,543 INFO L225 Difference]: With dead ends: 184 [2022-11-20 10:53:46,543 INFO L226 Difference]: Without dead ends: 182 [2022-11-20 10:53:46,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 299 SyntacticMatches, 84 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3984 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3066, Invalid=5306, Unknown=0, NotChecked=0, Total=8372 [2022-11-20 10:53:46,544 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 356 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:46,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 32 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:53:46,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-11-20 10:53:46,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 176. [2022-11-20 10:53:46,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.0114285714285713) internal successors, (177), 175 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:46,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 177 transitions. [2022-11-20 10:53:46,587 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 177 transitions. Word has length 172 [2022-11-20 10:53:46,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:46,587 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 177 transitions. [2022-11-20 10:53:46,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.6666666666666665) internal successors, (176), 48 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:46,588 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 177 transitions. [2022-11-20 10:53:46,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-11-20 10:53:46,588 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:46,589 INFO L195 NwaCegarLoop]: trace histogram [43, 42, 42, 42, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:46,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-11-20 10:53:46,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:46,789 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:53:46,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:46,790 INFO L85 PathProgramCache]: Analyzing trace with hash 178233521, now seen corresponding path program 83 times [2022-11-20 10:53:46,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:46,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345457199] [2022-11-20 10:53:46,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:46,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:46,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:50,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 2667 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:50,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:50,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345457199] [2022-11-20 10:53:50,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345457199] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:53:50,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256820768] [2022-11-20 10:53:50,091 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:53:50,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:50,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:53:50,092 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:53:50,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-11-20 10:53:50,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2022-11-20 10:53:50,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:53:50,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-20 10:53:50,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:50,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 2667 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:50,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:53:53,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 2667 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:53,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256820768] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:53:53,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:53:53,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89, 89] total 90 [2022-11-20 10:53:53,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107374105] [2022-11-20 10:53:53,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:53:53,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-11-20 10:53:53,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:53,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-11-20 10:53:53,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2026, Invalid=5984, Unknown=0, NotChecked=0, Total=8010 [2022-11-20 10:53:53,162 INFO L87 Difference]: Start difference. First operand 176 states and 177 transitions. Second operand has 90 states, 90 states have (on average 1.9666666666666666) internal successors, (177), 90 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:55,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:55,208 INFO L93 Difference]: Finished difference Result 310 states and 312 transitions. [2022-11-20 10:53:55,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-11-20 10:53:55,208 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.9666666666666666) internal successors, (177), 90 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2022-11-20 10:53:55,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:55,209 INFO L225 Difference]: With dead ends: 310 [2022-11-20 10:53:55,209 INFO L226 Difference]: Without dead ends: 177 [2022-11-20 10:53:55,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 262 SyntacticMatches, 87 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6826 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=4094, Invalid=13728, Unknown=0, NotChecked=0, Total=17822 [2022-11-20 10:53:55,210 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:55,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 404 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 10:53:55,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-11-20 10:53:55,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2022-11-20 10:53:55,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.0113636363636365) internal successors, (178), 176 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:55,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2022-11-20 10:53:55,264 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 175 [2022-11-20 10:53:55,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:55,264 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2022-11-20 10:53:55,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.9666666666666666) internal successors, (177), 90 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:55,264 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2022-11-20 10:53:55,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-11-20 10:53:55,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:55,265 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 42, 42, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:55,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-11-20 10:53:55,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2022-11-20 10:53:55,466 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:53:55,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:55,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1251487724, now seen corresponding path program 84 times [2022-11-20 10:53:55,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:55,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566567149] [2022-11-20 10:53:55,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:55,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:55,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:57,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3613 backedges. 903 proven. 2710 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:57,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:57,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566567149] [2022-11-20 10:53:57,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566567149] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:53:57,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894361731] [2022-11-20 10:53:57,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:53:57,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:57,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:53:57,247 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:53:57,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-11-20 10:53:57,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2022-11-20 10:53:57,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:53:57,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 92 conjunts are in the unsatisfiable core [2022-11-20 10:53:57,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:57,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3613 backedges. 946 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:57,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:53:59,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3613 backedges. 946 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:59,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894361731] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:53:59,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:53:59,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 49 [2022-11-20 10:53:59,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189208469] [2022-11-20 10:53:59,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:53:59,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-20 10:53:59,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:59,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-20 10:53:59,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1043, Invalid=1309, Unknown=0, NotChecked=0, Total=2352 [2022-11-20 10:53:59,488 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand has 49 states, 49 states have (on average 3.673469387755102) internal successors, (180), 49 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:00,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:00,560 INFO L93 Difference]: Finished difference Result 188 states and 189 transitions. [2022-11-20 10:54:00,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-20 10:54:00,561 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.673469387755102) internal successors, (180), 49 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 176 [2022-11-20 10:54:00,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:00,562 INFO L225 Difference]: With dead ends: 188 [2022-11-20 10:54:00,562 INFO L226 Difference]: Without dead ends: 186 [2022-11-20 10:54:00,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 306 SyntacticMatches, 86 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4165 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3203, Invalid=5539, Unknown=0, NotChecked=0, Total=8742 [2022-11-20 10:54:00,563 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 268 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:00,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 38 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:54:00,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-11-20 10:54:00,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 180. [2022-11-20 10:54:00,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.011173184357542) internal successors, (181), 179 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:00,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2022-11-20 10:54:00,614 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 176 [2022-11-20 10:54:00,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:00,615 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2022-11-20 10:54:00,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.673469387755102) internal successors, (180), 49 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:00,615 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2022-11-20 10:54:00,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-20 10:54:00,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:00,616 INFO L195 NwaCegarLoop]: trace histogram [44, 43, 43, 43, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:00,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-11-20 10:54:00,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:00,817 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:54:00,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:00,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1535490611, now seen corresponding path program 85 times [2022-11-20 10:54:00,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:54:00,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167925154] [2022-11-20 10:54:00,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:00,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:54:00,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:04,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 2795 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:04,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:54:04,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167925154] [2022-11-20 10:54:04,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167925154] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:54:04,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077682406] [2022-11-20 10:54:04,177 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:54:04,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:04,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:54:04,178 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:54:04,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-11-20 10:54:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:04,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-20 10:54:04,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:04,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 2795 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:04,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:54:07,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 2795 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:07,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077682406] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:54:07,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:54:07,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91, 91] total 92 [2022-11-20 10:54:07,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641092909] [2022-11-20 10:54:07,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:54:07,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-11-20 10:54:07,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:54:07,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-11-20 10:54:07,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2117, Invalid=6255, Unknown=0, NotChecked=0, Total=8372 [2022-11-20 10:54:07,225 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand has 92 states, 92 states have (on average 1.9673913043478262) internal successors, (181), 92 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:09,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:09,442 INFO L93 Difference]: Finished difference Result 317 states and 319 transitions. [2022-11-20 10:54:09,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-11-20 10:54:09,443 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.9673913043478262) internal successors, (181), 92 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2022-11-20 10:54:09,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:09,444 INFO L225 Difference]: With dead ends: 317 [2022-11-20 10:54:09,444 INFO L226 Difference]: Without dead ends: 181 [2022-11-20 10:54:09,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 268 SyntacticMatches, 89 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7139 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=4277, Invalid=14355, Unknown=0, NotChecked=0, Total=18632 [2022-11-20 10:54:09,448 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 9 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:09,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 499 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 10:54:09,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-11-20 10:54:09,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2022-11-20 10:54:09,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.011111111111111) internal successors, (182), 180 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:09,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2022-11-20 10:54:09,523 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 179 [2022-11-20 10:54:09,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:09,523 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2022-11-20 10:54:09,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.9673913043478262) internal successors, (181), 92 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:09,524 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2022-11-20 10:54:09,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-11-20 10:54:09,525 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:09,525 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 43, 43, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:09,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-11-20 10:54:09,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2022-11-20 10:54:09,733 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:54:09,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:09,733 INFO L85 PathProgramCache]: Analyzing trace with hash 181583752, now seen corresponding path program 86 times [2022-11-20 10:54:09,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:54:09,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613645690] [2022-11-20 10:54:09,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:09,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:54:09,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:11,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3785 backedges. 946 proven. 2839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:11,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:54:11,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613645690] [2022-11-20 10:54:11,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613645690] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:54:11,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926051146] [2022-11-20 10:54:11,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:54:11,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:11,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:54:11,592 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:54:11,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-11-20 10:54:11,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:54:11,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:11,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-20 10:54:11,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:12,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3785 backedges. 990 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:12,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:54:13,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3785 backedges. 990 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:13,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926051146] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:54:13,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:54:13,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 50 [2022-11-20 10:54:13,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132892251] [2022-11-20 10:54:13,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:54:13,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-20 10:54:13,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:54:13,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-20 10:54:13,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1089, Invalid=1361, Unknown=0, NotChecked=0, Total=2450 [2022-11-20 10:54:13,862 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand has 50 states, 50 states have (on average 3.68) internal successors, (184), 50 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:14,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:14,955 INFO L93 Difference]: Finished difference Result 192 states and 193 transitions. [2022-11-20 10:54:14,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-11-20 10:54:14,956 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.68) internal successors, (184), 50 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2022-11-20 10:54:14,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:14,957 INFO L225 Difference]: With dead ends: 192 [2022-11-20 10:54:14,957 INFO L226 Difference]: Without dead ends: 190 [2022-11-20 10:54:14,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 313 SyntacticMatches, 88 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4350 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3343, Invalid=5777, Unknown=0, NotChecked=0, Total=9120 [2022-11-20 10:54:14,958 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 282 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:14,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 34 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:54:14,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-11-20 10:54:15,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 184. [2022-11-20 10:54:15,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.010928961748634) internal successors, (185), 183 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:15,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2022-11-20 10:54:15,005 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 180 [2022-11-20 10:54:15,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:15,005 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2022-11-20 10:54:15,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.68) internal successors, (184), 50 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:15,006 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2022-11-20 10:54:15,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-11-20 10:54:15,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:15,007 INFO L195 NwaCegarLoop]: trace histogram [45, 44, 44, 44, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:15,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-11-20 10:54:15,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:15,213 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:54:15,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:15,214 INFO L85 PathProgramCache]: Analyzing trace with hash -2092416847, now seen corresponding path program 87 times [2022-11-20 10:54:15,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:54:15,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576006179] [2022-11-20 10:54:15,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:15,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:54:15,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:18,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 2926 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:18,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:54:18,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576006179] [2022-11-20 10:54:18,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576006179] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:54:18,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790542571] [2022-11-20 10:54:18,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:54:18,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:18,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:54:18,695 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:54:18,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-11-20 10:54:18,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2022-11-20 10:54:18,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:18,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 92 conjunts are in the unsatisfiable core [2022-11-20 10:54:18,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:19,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 2926 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:19,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:54:21,984 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 2926 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:21,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790542571] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:54:21,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:54:21,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93, 93] total 94 [2022-11-20 10:54:21,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684856067] [2022-11-20 10:54:21,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:54:21,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-11-20 10:54:21,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:54:21,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-11-20 10:54:21,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2210, Invalid=6532, Unknown=0, NotChecked=0, Total=8742 [2022-11-20 10:54:21,987 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand has 94 states, 94 states have (on average 1.9680851063829787) internal successors, (185), 94 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:24,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:24,239 INFO L93 Difference]: Finished difference Result 324 states and 326 transitions. [2022-11-20 10:54:24,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-20 10:54:24,240 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.9680851063829787) internal successors, (185), 94 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 183 [2022-11-20 10:54:24,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:24,240 INFO L225 Difference]: With dead ends: 324 [2022-11-20 10:54:24,240 INFO L226 Difference]: Without dead ends: 185 [2022-11-20 10:54:24,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 274 SyntacticMatches, 91 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7459 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=4464, Invalid=14996, Unknown=0, NotChecked=0, Total=19460 [2022-11-20 10:54:24,241 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 9 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:24,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 410 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 10:54:24,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-20 10:54:24,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-11-20 10:54:24,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.0108695652173914) internal successors, (186), 184 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:24,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2022-11-20 10:54:24,288 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 183 [2022-11-20 10:54:24,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:24,288 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2022-11-20 10:54:24,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.9680851063829787) internal successors, (185), 94 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:24,288 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2022-11-20 10:54:24,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-11-20 10:54:24,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:24,289 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 44, 44, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:24,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-11-20 10:54:24,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:24,495 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:54:24,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:24,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1324915476, now seen corresponding path program 88 times [2022-11-20 10:54:24,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:54:24,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791124006] [2022-11-20 10:54:24,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:24,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:54:24,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:26,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3961 backedges. 990 proven. 2971 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:26,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:54:26,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791124006] [2022-11-20 10:54:26,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791124006] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:54:26,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940270574] [2022-11-20 10:54:26,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:54:26,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:26,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:54:26,456 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:54:26,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-11-20 10:54:26,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:54:26,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:26,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-20 10:54:26,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:26,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3961 backedges. 1035 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:26,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:54:28,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3961 backedges. 1035 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:28,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940270574] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:54:28,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:54:28,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 51 [2022-11-20 10:54:28,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867394501] [2022-11-20 10:54:28,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:54:28,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-20 10:54:28,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:54:28,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-20 10:54:28,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1136, Invalid=1414, Unknown=0, NotChecked=0, Total=2550 [2022-11-20 10:54:28,856 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand has 51 states, 51 states have (on average 3.6862745098039214) internal successors, (188), 51 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:29,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:29,982 INFO L93 Difference]: Finished difference Result 196 states and 197 transitions. [2022-11-20 10:54:29,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-11-20 10:54:29,983 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.6862745098039214) internal successors, (188), 51 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2022-11-20 10:54:29,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:29,984 INFO L225 Difference]: With dead ends: 196 [2022-11-20 10:54:29,984 INFO L226 Difference]: Without dead ends: 194 [2022-11-20 10:54:29,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 320 SyntacticMatches, 90 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4539 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3486, Invalid=6020, Unknown=0, NotChecked=0, Total=9506 [2022-11-20 10:54:29,985 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 196 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:29,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 41 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:54:29,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-11-20 10:54:30,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 188. [2022-11-20 10:54:30,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.0106951871657754) internal successors, (189), 187 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:30,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 189 transitions. [2022-11-20 10:54:30,034 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 189 transitions. Word has length 184 [2022-11-20 10:54:30,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:30,034 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 189 transitions. [2022-11-20 10:54:30,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.6862745098039214) internal successors, (188), 51 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:30,034 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 189 transitions. [2022-11-20 10:54:30,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-11-20 10:54:30,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:30,035 INFO L195 NwaCegarLoop]: trace histogram [46, 45, 45, 45, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:30,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-11-20 10:54:30,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:30,236 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:54:30,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:30,236 INFO L85 PathProgramCache]: Analyzing trace with hash 197325005, now seen corresponding path program 89 times [2022-11-20 10:54:30,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:54:30,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672519278] [2022-11-20 10:54:30,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:30,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:54:30,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:33,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 3060 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:33,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:54:33,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672519278] [2022-11-20 10:54:33,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672519278] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:54:33,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70286559] [2022-11-20 10:54:33,848 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:54:33,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:33,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:54:33,849 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:54:33,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-11-20 10:54:34,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2022-11-20 10:54:34,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:34,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-20 10:54:34,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:34,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 3060 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:34,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:54:37,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 3060 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:37,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70286559] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:54:37,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:54:37,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 96 [2022-11-20 10:54:37,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129087552] [2022-11-20 10:54:37,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:54:37,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-11-20 10:54:37,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:54:37,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-11-20 10:54:37,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2305, Invalid=6815, Unknown=0, NotChecked=0, Total=9120 [2022-11-20 10:54:37,223 INFO L87 Difference]: Start difference. First operand 188 states and 189 transitions. Second operand has 96 states, 96 states have (on average 1.96875) internal successors, (189), 96 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:39,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:39,530 INFO L93 Difference]: Finished difference Result 331 states and 333 transitions. [2022-11-20 10:54:39,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-11-20 10:54:39,531 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.96875) internal successors, (189), 96 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2022-11-20 10:54:39,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:39,531 INFO L225 Difference]: With dead ends: 331 [2022-11-20 10:54:39,532 INFO L226 Difference]: Without dead ends: 189 [2022-11-20 10:54:39,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 280 SyntacticMatches, 93 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7786 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=4655, Invalid=15651, Unknown=0, NotChecked=0, Total=20306 [2022-11-20 10:54:39,533 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 9 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:39,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 451 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 10:54:39,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-20 10:54:39,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-11-20 10:54:39,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.0106382978723405) internal successors, (190), 188 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:39,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2022-11-20 10:54:39,604 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 187 [2022-11-20 10:54:39,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:39,604 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2022-11-20 10:54:39,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.96875) internal successors, (189), 96 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:39,604 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2022-11-20 10:54:39,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-20 10:54:39,605 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:39,605 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 45, 45, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:39,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-11-20 10:54:39,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:39,806 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:54:39,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:39,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1083146120, now seen corresponding path program 90 times [2022-11-20 10:54:39,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:54:39,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550351566] [2022-11-20 10:54:39,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:39,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:54:39,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:41,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 1035 proven. 3106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:41,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:54:41,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550351566] [2022-11-20 10:54:41,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550351566] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:54:41,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916249219] [2022-11-20 10:54:41,797 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:54:41,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:41,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:54:41,798 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:54:41,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-11-20 10:54:42,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2022-11-20 10:54:42,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:42,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-20 10:54:42,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:42,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 1081 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:42,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:54:44,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 1081 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:44,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916249219] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:54:44,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:54:44,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 52 [2022-11-20 10:54:44,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970138057] [2022-11-20 10:54:44,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:54:44,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-20 10:54:44,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:54:44,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-20 10:54:44,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1184, Invalid=1468, Unknown=0, NotChecked=0, Total=2652 [2022-11-20 10:54:44,298 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand has 52 states, 52 states have (on average 3.6923076923076925) internal successors, (192), 52 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:45,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:45,447 INFO L93 Difference]: Finished difference Result 200 states and 201 transitions. [2022-11-20 10:54:45,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-11-20 10:54:45,448 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.6923076923076925) internal successors, (192), 52 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2022-11-20 10:54:45,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:45,449 INFO L225 Difference]: With dead ends: 200 [2022-11-20 10:54:45,449 INFO L226 Difference]: Without dead ends: 198 [2022-11-20 10:54:45,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 327 SyntacticMatches, 92 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4732 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3632, Invalid=6268, Unknown=0, NotChecked=0, Total=9900 [2022-11-20 10:54:45,450 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 292 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:45,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 33 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:54:45,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-11-20 10:54:45,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 192. [2022-11-20 10:54:45,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.0104712041884816) internal successors, (193), 191 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:45,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 193 transitions. [2022-11-20 10:54:45,502 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 193 transitions. Word has length 188 [2022-11-20 10:54:45,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:45,503 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 193 transitions. [2022-11-20 10:54:45,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.6923076923076925) internal successors, (192), 52 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:45,503 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 193 transitions. [2022-11-20 10:54:45,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-11-20 10:54:45,504 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:45,504 INFO L195 NwaCegarLoop]: trace histogram [47, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:45,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-11-20 10:54:45,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2022-11-20 10:54:45,710 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:54:45,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:45,710 INFO L85 PathProgramCache]: Analyzing trace with hash -78413647, now seen corresponding path program 91 times [2022-11-20 10:54:45,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:54:45,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121165804] [2022-11-20 10:54:45,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:45,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:54:45,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:49,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 3197 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:49,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:54:49,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121165804] [2022-11-20 10:54:49,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121165804] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:54:49,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883065051] [2022-11-20 10:54:49,494 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:54:49,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:49,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:54:49,495 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:54:49,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-11-20 10:54:49,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:49,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 728 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-20 10:54:49,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:49,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 3197 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:49,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:54:52,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 3197 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:52,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883065051] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:54:52,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:54:52,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 98 [2022-11-20 10:54:52,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528698857] [2022-11-20 10:54:52,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:54:52,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-11-20 10:54:52,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:54:52,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-11-20 10:54:52,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2402, Invalid=7104, Unknown=0, NotChecked=0, Total=9506 [2022-11-20 10:54:52,841 INFO L87 Difference]: Start difference. First operand 192 states and 193 transitions. Second operand has 98 states, 98 states have (on average 1.969387755102041) internal successors, (193), 98 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:55,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:55,224 INFO L93 Difference]: Finished difference Result 338 states and 340 transitions. [2022-11-20 10:54:55,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-11-20 10:54:55,224 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.969387755102041) internal successors, (193), 98 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2022-11-20 10:54:55,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:55,225 INFO L225 Difference]: With dead ends: 338 [2022-11-20 10:54:55,225 INFO L226 Difference]: Without dead ends: 193 [2022-11-20 10:54:55,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 286 SyntacticMatches, 95 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8120 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=4850, Invalid=16320, Unknown=0, NotChecked=0, Total=21170 [2022-11-20 10:54:55,226 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 9 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:55,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 459 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 10:54:55,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-11-20 10:54:55,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2022-11-20 10:54:55,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.0104166666666667) internal successors, (194), 192 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:55,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2022-11-20 10:54:55,291 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 191 [2022-11-20 10:54:55,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:55,291 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2022-11-20 10:54:55,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.969387755102041) internal successors, (193), 98 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:55,292 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2022-11-20 10:54:55,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-11-20 10:54:55,293 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:55,293 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 46, 46, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:55,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-11-20 10:54:55,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:55,499 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:54:55,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:55,499 INFO L85 PathProgramCache]: Analyzing trace with hash -982238740, now seen corresponding path program 92 times [2022-11-20 10:54:55,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:54:55,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484815639] [2022-11-20 10:54:55,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:55,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:54:55,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:57,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4325 backedges. 1081 proven. 3244 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:57,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:54:57,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484815639] [2022-11-20 10:54:57,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484815639] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:54:57,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947115888] [2022-11-20 10:54:57,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:54:57,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:57,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:54:57,610 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:54:57,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-11-20 10:54:57,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:54:57,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:57,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 100 conjunts are in the unsatisfiable core [2022-11-20 10:54:57,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:58,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4325 backedges. 1128 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:58,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:55:00,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4325 backedges. 1128 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:00,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947115888] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:55:00,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:55:00,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 53 [2022-11-20 10:55:00,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492169928] [2022-11-20 10:55:00,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:55:00,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-20 10:55:00,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:00,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-20 10:55:00,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1233, Invalid=1523, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 10:55:00,079 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand has 53 states, 53 states have (on average 3.69811320754717) internal successors, (196), 53 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:01,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:01,281 INFO L93 Difference]: Finished difference Result 204 states and 205 transitions. [2022-11-20 10:55:01,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-11-20 10:55:01,281 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.69811320754717) internal successors, (196), 53 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2022-11-20 10:55:01,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:01,282 INFO L225 Difference]: With dead ends: 204 [2022-11-20 10:55:01,283 INFO L226 Difference]: Without dead ends: 202 [2022-11-20 10:55:01,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 334 SyntacticMatches, 94 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4929 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3781, Invalid=6521, Unknown=0, NotChecked=0, Total=10302 [2022-11-20 10:55:01,283 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 296 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:01,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 41 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:55:01,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-11-20 10:55:01,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 196. [2022-11-20 10:55:01,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.0102564102564102) internal successors, (197), 195 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:01,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 197 transitions. [2022-11-20 10:55:01,334 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 197 transitions. Word has length 192 [2022-11-20 10:55:01,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:01,334 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 197 transitions. [2022-11-20 10:55:01,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.69811320754717) internal successors, (196), 53 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:01,334 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 197 transitions. [2022-11-20 10:55:01,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-11-20 10:55:01,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:01,335 INFO L195 NwaCegarLoop]: trace histogram [48, 47, 47, 47, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:01,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-11-20 10:55:01,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:55:01,539 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:55:01,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:01,539 INFO L85 PathProgramCache]: Analyzing trace with hash -257295411, now seen corresponding path program 93 times [2022-11-20 10:55:01,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:01,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496290210] [2022-11-20 10:55:01,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:01,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:01,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:05,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 3337 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:05,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:05,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496290210] [2022-11-20 10:55:05,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496290210] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:55:05,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994911732] [2022-11-20 10:55:05,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:55:05,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:55:05,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:55:05,491 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:55:05,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-11-20 10:55:05,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2022-11-20 10:55:05,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:55:05,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-20 10:55:05,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:55:06,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 3337 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:06,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:55:09,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 3337 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:09,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994911732] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:55:09,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:55:09,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99, 99] total 100 [2022-11-20 10:55:09,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18476238] [2022-11-20 10:55:09,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:55:09,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-11-20 10:55:09,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:09,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-11-20 10:55:09,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2501, Invalid=7399, Unknown=0, NotChecked=0, Total=9900 [2022-11-20 10:55:09,115 INFO L87 Difference]: Start difference. First operand 196 states and 197 transitions. Second operand has 100 states, 100 states have (on average 1.97) internal successors, (197), 100 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:11,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:11,682 INFO L93 Difference]: Finished difference Result 345 states and 347 transitions. [2022-11-20 10:55:11,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-11-20 10:55:11,683 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.97) internal successors, (197), 100 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2022-11-20 10:55:11,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:11,683 INFO L225 Difference]: With dead ends: 345 [2022-11-20 10:55:11,683 INFO L226 Difference]: Without dead ends: 197 [2022-11-20 10:55:11,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 292 SyntacticMatches, 97 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8461 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=5049, Invalid=17003, Unknown=0, NotChecked=0, Total=22052 [2022-11-20 10:55:11,684 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 9 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 1126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:11,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 561 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1126 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 10:55:11,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-11-20 10:55:11,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2022-11-20 10:55:11,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.010204081632653) internal successors, (198), 196 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:11,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2022-11-20 10:55:11,738 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 195 [2022-11-20 10:55:11,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:11,738 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2022-11-20 10:55:11,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.97) internal successors, (197), 100 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:11,739 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2022-11-20 10:55:11,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-11-20 10:55:11,739 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:11,739 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 47, 47, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:11,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-11-20 10:55:11,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2022-11-20 10:55:11,940 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:55:11,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:11,940 INFO L85 PathProgramCache]: Analyzing trace with hash -586834040, now seen corresponding path program 94 times [2022-11-20 10:55:11,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:11,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585801722] [2022-11-20 10:55:11,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:11,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:11,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:14,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4513 backedges. 1128 proven. 3385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:14,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:14,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585801722] [2022-11-20 10:55:14,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585801722] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:55:14,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612841896] [2022-11-20 10:55:14,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:55:14,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:55:14,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:55:14,163 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:55:14,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-11-20 10:55:14,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:55:14,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:55:14,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 102 conjunts are in the unsatisfiable core [2022-11-20 10:55:14,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:55:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4513 backedges. 1176 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:14,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:55:16,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4513 backedges. 1176 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:16,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612841896] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:55:16,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:55:16,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 54 [2022-11-20 10:55:16,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455966242] [2022-11-20 10:55:16,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:55:16,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-20 10:55:16,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:16,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-20 10:55:16,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1283, Invalid=1579, Unknown=0, NotChecked=0, Total=2862 [2022-11-20 10:55:16,772 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand has 54 states, 54 states have (on average 3.7037037037037037) internal successors, (200), 54 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:18,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:18,000 INFO L93 Difference]: Finished difference Result 208 states and 209 transitions. [2022-11-20 10:55:18,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-11-20 10:55:18,001 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.7037037037037037) internal successors, (200), 54 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2022-11-20 10:55:18,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:18,002 INFO L225 Difference]: With dead ends: 208 [2022-11-20 10:55:18,002 INFO L226 Difference]: Without dead ends: 206 [2022-11-20 10:55:18,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 341 SyntacticMatches, 96 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5130 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3933, Invalid=6779, Unknown=0, NotChecked=0, Total=10712 [2022-11-20 10:55:18,004 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 300 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:18,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 33 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:55:18,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-11-20 10:55:18,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 200. [2022-11-20 10:55:18,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.0100502512562815) internal successors, (201), 199 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:18,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 201 transitions. [2022-11-20 10:55:18,072 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 201 transitions. Word has length 196 [2022-11-20 10:55:18,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:18,072 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 201 transitions. [2022-11-20 10:55:18,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.7037037037037037) internal successors, (200), 54 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:18,072 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 201 transitions. [2022-11-20 10:55:18,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-11-20 10:55:18,073 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:18,073 INFO L195 NwaCegarLoop]: trace histogram [49, 48, 48, 48, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:18,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-11-20 10:55:18,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-11-20 10:55:18,274 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:55:18,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:18,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1851170639, now seen corresponding path program 95 times [2022-11-20 10:55:18,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:18,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39549217] [2022-11-20 10:55:18,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:18,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:18,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:22,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 3480 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:22,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:22,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39549217] [2022-11-20 10:55:22,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39549217] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:55:22,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809968360] [2022-11-20 10:55:22,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:55:22,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:55:22,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:55:22,396 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:55:22,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-11-20 10:55:22,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2022-11-20 10:55:22,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:55:22,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 100 conjunts are in the unsatisfiable core [2022-11-20 10:55:22,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:55:22,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 3480 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:22,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:55:26,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 3480 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:26,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809968360] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:55:26,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:55:26,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 102 [2022-11-20 10:55:26,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764614388] [2022-11-20 10:55:26,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:55:26,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-11-20 10:55:26,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:26,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-11-20 10:55:26,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2602, Invalid=7700, Unknown=0, NotChecked=0, Total=10302 [2022-11-20 10:55:26,140 INFO L87 Difference]: Start difference. First operand 200 states and 201 transitions. Second operand has 102 states, 102 states have (on average 1.9705882352941178) internal successors, (201), 102 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:28,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:28,670 INFO L93 Difference]: Finished difference Result 352 states and 354 transitions. [2022-11-20 10:55:28,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-11-20 10:55:28,670 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.9705882352941178) internal successors, (201), 102 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2022-11-20 10:55:28,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:28,671 INFO L225 Difference]: With dead ends: 352 [2022-11-20 10:55:28,671 INFO L226 Difference]: Without dead ends: 201 [2022-11-20 10:55:28,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 298 SyntacticMatches, 99 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8809 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=5252, Invalid=17700, Unknown=0, NotChecked=0, Total=22952 [2022-11-20 10:55:28,672 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 9 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:28,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 383 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:55:28,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-11-20 10:55:28,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2022-11-20 10:55:28,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.01) internal successors, (202), 200 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:28,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 202 transitions. [2022-11-20 10:55:28,725 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 202 transitions. Word has length 199 [2022-11-20 10:55:28,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:28,726 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 202 transitions. [2022-11-20 10:55:28,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.9705882352941178) internal successors, (201), 102 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:28,726 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 202 transitions. [2022-11-20 10:55:28,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-11-20 10:55:28,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:28,727 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 48, 48, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:28,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-11-20 10:55:28,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:55:28,928 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:55:28,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:28,929 INFO L85 PathProgramCache]: Analyzing trace with hash -607736084, now seen corresponding path program 96 times [2022-11-20 10:55:28,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:28,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124035956] [2022-11-20 10:55:28,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:28,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:28,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:31,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4705 backedges. 1176 proven. 3529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:31,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:31,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124035956] [2022-11-20 10:55:31,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124035956] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:55:31,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096105214] [2022-11-20 10:55:31,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:55:31,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:55:31,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:55:31,227 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:55:31,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-11-20 10:55:31,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2022-11-20 10:55:31,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:55:31,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-20 10:55:31,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:55:31,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4705 backedges. 1225 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:31,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:55:34,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4705 backedges. 1225 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:34,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096105214] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:55:34,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:55:34,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 55 [2022-11-20 10:55:34,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553740024] [2022-11-20 10:55:34,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:55:34,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-20 10:55:34,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:34,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-20 10:55:34,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1334, Invalid=1636, Unknown=0, NotChecked=0, Total=2970 [2022-11-20 10:55:34,015 INFO L87 Difference]: Start difference. First operand 201 states and 202 transitions. Second operand has 55 states, 55 states have (on average 3.709090909090909) internal successors, (204), 55 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:35,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:35,276 INFO L93 Difference]: Finished difference Result 212 states and 213 transitions. [2022-11-20 10:55:35,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-11-20 10:55:35,276 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.709090909090909) internal successors, (204), 55 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2022-11-20 10:55:35,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:35,278 INFO L225 Difference]: With dead ends: 212 [2022-11-20 10:55:35,278 INFO L226 Difference]: Without dead ends: 210 [2022-11-20 10:55:35,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 348 SyntacticMatches, 98 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5335 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4088, Invalid=7042, Unknown=0, NotChecked=0, Total=11130 [2022-11-20 10:55:35,279 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 208 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:35,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 34 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:55:35,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-11-20 10:55:35,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 204. [2022-11-20 10:55:35,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.0098522167487685) internal successors, (205), 203 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:35,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2022-11-20 10:55:35,340 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 200 [2022-11-20 10:55:35,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:35,340 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2022-11-20 10:55:35,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.709090909090909) internal successors, (204), 55 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:35,341 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2022-11-20 10:55:35,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-11-20 10:55:35,341 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:35,342 INFO L195 NwaCegarLoop]: trace histogram [50, 49, 49, 49, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:35,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-11-20 10:55:35,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:55:35,548 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:55:35,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:35,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1773705523, now seen corresponding path program 97 times [2022-11-20 10:55:35,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:35,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490000396] [2022-11-20 10:55:35,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:35,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:35,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:39,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 3626 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:39,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:39,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490000396] [2022-11-20 10:55:39,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490000396] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:55:39,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851330488] [2022-11-20 10:55:39,935 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:55:39,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:55:39,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:55:39,936 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:55:39,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-11-20 10:55:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:40,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 102 conjunts are in the unsatisfiable core [2022-11-20 10:55:40,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:55:40,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 3626 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:40,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:55:43,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 3626 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:43,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851330488] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:55:43,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:55:43,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103, 103] total 104 [2022-11-20 10:55:43,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720864456] [2022-11-20 10:55:43,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:55:43,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-11-20 10:55:43,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:43,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-11-20 10:55:43,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2705, Invalid=8007, Unknown=0, NotChecked=0, Total=10712 [2022-11-20 10:55:43,885 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand has 104 states, 104 states have (on average 1.9711538461538463) internal successors, (205), 104 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:46,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:46,482 INFO L93 Difference]: Finished difference Result 359 states and 361 transitions. [2022-11-20 10:55:46,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-11-20 10:55:46,482 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.9711538461538463) internal successors, (205), 104 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 203 [2022-11-20 10:55:46,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:46,483 INFO L225 Difference]: With dead ends: 359 [2022-11-20 10:55:46,483 INFO L226 Difference]: Without dead ends: 205 [2022-11-20 10:55:46,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 304 SyntacticMatches, 101 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9164 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=5459, Invalid=18411, Unknown=0, NotChecked=0, Total=23870 [2022-11-20 10:55:46,485 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 9 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:46,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 392 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 10:55:46,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-11-20 10:55:46,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2022-11-20 10:55:46,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.0098039215686274) internal successors, (206), 204 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:46,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2022-11-20 10:55:46,556 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 203 [2022-11-20 10:55:46,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:46,557 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2022-11-20 10:55:46,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.9711538461538463) internal successors, (205), 104 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:46,557 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2022-11-20 10:55:46,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-11-20 10:55:46,558 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:46,558 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 49, 49, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:46,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-11-20 10:55:46,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-11-20 10:55:46,758 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:55:46,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:46,758 INFO L85 PathProgramCache]: Analyzing trace with hash -666034296, now seen corresponding path program 98 times [2022-11-20 10:55:46,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:46,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533645905] [2022-11-20 10:55:46,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:46,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:46,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:49,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4901 backedges. 1225 proven. 3676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:49,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:49,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533645905] [2022-11-20 10:55:49,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533645905] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:55:49,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516202460] [2022-11-20 10:55:49,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:55:49,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:55:49,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:55:49,372 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:55:49,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-11-20 10:55:49,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:55:49,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:55:49,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 106 conjunts are in the unsatisfiable core [2022-11-20 10:55:49,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:55:49,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4901 backedges. 1275 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:49,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:55:52,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4901 backedges. 1275 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:52,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516202460] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:55:52,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:55:52,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 56 [2022-11-20 10:55:52,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500473028] [2022-11-20 10:55:52,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:55:52,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-20 10:55:52,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:52,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-20 10:55:52,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1386, Invalid=1694, Unknown=0, NotChecked=0, Total=3080 [2022-11-20 10:55:52,319 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand has 56 states, 56 states have (on average 3.7142857142857144) internal successors, (208), 56 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:53,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:53,792 INFO L93 Difference]: Finished difference Result 216 states and 217 transitions. [2022-11-20 10:55:53,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-11-20 10:55:53,793 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.7142857142857144) internal successors, (208), 56 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 204 [2022-11-20 10:55:53,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:53,794 INFO L225 Difference]: With dead ends: 216 [2022-11-20 10:55:53,795 INFO L226 Difference]: Without dead ends: 214 [2022-11-20 10:55:53,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 355 SyntacticMatches, 100 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5544 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4246, Invalid=7310, Unknown=0, NotChecked=0, Total=11556 [2022-11-20 10:55:53,796 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 214 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:53,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 32 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 10:55:53,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-11-20 10:55:53,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 208. [2022-11-20 10:55:53,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.0096618357487923) internal successors, (209), 207 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:53,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 209 transitions. [2022-11-20 10:55:53,866 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 209 transitions. Word has length 204 [2022-11-20 10:55:53,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:53,867 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 209 transitions. [2022-11-20 10:55:53,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.7142857142857144) internal successors, (208), 56 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:53,867 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 209 transitions. [2022-11-20 10:55:53,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-11-20 10:55:53,868 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:53,868 INFO L195 NwaCegarLoop]: trace histogram [51, 50, 50, 50, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:53,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-11-20 10:55:54,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-11-20 10:55:54,069 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:55:54,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:54,069 INFO L85 PathProgramCache]: Analyzing trace with hash 926015665, now seen corresponding path program 99 times [2022-11-20 10:55:54,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:54,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242622551] [2022-11-20 10:55:54,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:54,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:54,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:59,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 3775 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:59,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:59,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242622551] [2022-11-20 10:55:59,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242622551] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:55:59,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266652236] [2022-11-20 10:55:59,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:55:59,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:55:59,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:55:59,037 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:55:59,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-11-20 10:55:59,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2022-11-20 10:55:59,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:55:59,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-20 10:55:59,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:55:59,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 3775 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:59,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:56:03,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 3775 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:56:03,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266652236] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:56:03,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:56:03,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105, 105] total 106 [2022-11-20 10:56:03,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770192389] [2022-11-20 10:56:03,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:56:03,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-11-20 10:56:03,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:56:03,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-11-20 10:56:03,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2810, Invalid=8320, Unknown=0, NotChecked=0, Total=11130 [2022-11-20 10:56:03,463 INFO L87 Difference]: Start difference. First operand 208 states and 209 transitions. Second operand has 106 states, 106 states have (on average 1.971698113207547) internal successors, (209), 106 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:06,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:56:06,649 INFO L93 Difference]: Finished difference Result 366 states and 368 transitions. [2022-11-20 10:56:06,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-11-20 10:56:06,650 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.971698113207547) internal successors, (209), 106 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 207 [2022-11-20 10:56:06,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:56:06,651 INFO L225 Difference]: With dead ends: 366 [2022-11-20 10:56:06,651 INFO L226 Difference]: Without dead ends: 209 [2022-11-20 10:56:06,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 310 SyntacticMatches, 103 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9526 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=5670, Invalid=19136, Unknown=0, NotChecked=0, Total=24806 [2022-11-20 10:56:06,652 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 9 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:56:06,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 497 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 10:56:06,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-11-20 10:56:06,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2022-11-20 10:56:06,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.0096153846153846) internal successors, (210), 208 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:06,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 210 transitions. [2022-11-20 10:56:06,724 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 210 transitions. Word has length 207 [2022-11-20 10:56:06,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:56:06,725 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 210 transitions. [2022-11-20 10:56:06,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 1.971698113207547) internal successors, (209), 106 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:06,725 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 210 transitions. [2022-11-20 10:56:06,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-11-20 10:56:06,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:56:06,726 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 50, 50, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:06,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-11-20 10:56:06,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-11-20 10:56:06,927 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:56:06,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:06,927 INFO L85 PathProgramCache]: Analyzing trace with hash 434553836, now seen corresponding path program 100 times [2022-11-20 10:56:06,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:56:06,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805853911] [2022-11-20 10:56:06,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:56:06,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:56:06,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:09,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5101 backedges. 1275 proven. 3826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:56:09,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:56:09,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805853911] [2022-11-20 10:56:09,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805853911] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:56:09,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608251081] [2022-11-20 10:56:09,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:56:09,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:56:09,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:56:09,468 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:56:09,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-11-20 10:56:09,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:56:09,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:56:09,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 108 conjunts are in the unsatisfiable core [2022-11-20 10:56:09,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:56:09,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5101 backedges. 1326 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:56:09,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:56:12,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5101 backedges. 1326 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:56:12,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608251081] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:56:12,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:56:12,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 57 [2022-11-20 10:56:12,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266109951] [2022-11-20 10:56:12,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:56:12,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-20 10:56:12,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:56:12,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-20 10:56:12,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1439, Invalid=1753, Unknown=0, NotChecked=0, Total=3192 [2022-11-20 10:56:12,354 INFO L87 Difference]: Start difference. First operand 209 states and 210 transitions. Second operand has 57 states, 57 states have (on average 3.719298245614035) internal successors, (212), 57 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:13,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:56:13,695 INFO L93 Difference]: Finished difference Result 220 states and 221 transitions. [2022-11-20 10:56:13,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-11-20 10:56:13,696 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.719298245614035) internal successors, (212), 57 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 208 [2022-11-20 10:56:13,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:56:13,697 INFO L225 Difference]: With dead ends: 220 [2022-11-20 10:56:13,697 INFO L226 Difference]: Without dead ends: 218 [2022-11-20 10:56:13,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 362 SyntacticMatches, 102 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5757 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4407, Invalid=7583, Unknown=0, NotChecked=0, Total=11990 [2022-11-20 10:56:13,698 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 320 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:56:13,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 36 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:56:13,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-11-20 10:56:13,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 212. [2022-11-20 10:56:13,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.009478672985782) internal successors, (213), 211 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:13,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 213 transitions. [2022-11-20 10:56:13,768 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 213 transitions. Word has length 208 [2022-11-20 10:56:13,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:56:13,768 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 213 transitions. [2022-11-20 10:56:13,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.719298245614035) internal successors, (212), 57 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:13,768 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 213 transitions. [2022-11-20 10:56:13,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-11-20 10:56:13,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:56:13,770 INFO L195 NwaCegarLoop]: trace histogram [52, 51, 51, 51, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:13,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-11-20 10:56:13,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-11-20 10:56:13,975 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:56:13,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:13,975 INFO L85 PathProgramCache]: Analyzing trace with hash 766718413, now seen corresponding path program 101 times [2022-11-20 10:56:13,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:56:13,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375815537] [2022-11-20 10:56:13,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:56:13,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:56:14,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:18,712 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 3927 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:56:18,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:56:18,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375815537] [2022-11-20 10:56:18,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375815537] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:56:18,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532252546] [2022-11-20 10:56:18,713 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:56:18,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:56:18,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:56:18,714 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:56:18,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-11-20 10:56:19,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2022-11-20 10:56:19,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:56:19,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 803 conjuncts, 106 conjunts are in the unsatisfiable core [2022-11-20 10:56:19,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:56:19,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 3927 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:56:19,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:56:23,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 3927 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:56:23,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532252546] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:56:23,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:56:23,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107, 107] total 108 [2022-11-20 10:56:23,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847507112] [2022-11-20 10:56:23,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:56:23,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-11-20 10:56:23,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:56:23,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-11-20 10:56:23,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2917, Invalid=8639, Unknown=0, NotChecked=0, Total=11556 [2022-11-20 10:56:23,077 INFO L87 Difference]: Start difference. First operand 212 states and 213 transitions. Second operand has 108 states, 108 states have (on average 1.9722222222222223) internal successors, (213), 108 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:26,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:56:26,143 INFO L93 Difference]: Finished difference Result 373 states and 375 transitions. [2022-11-20 10:56:26,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-11-20 10:56:26,143 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.9722222222222223) internal successors, (213), 108 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 211 [2022-11-20 10:56:26,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:56:26,144 INFO L225 Difference]: With dead ends: 373 [2022-11-20 10:56:26,144 INFO L226 Difference]: Without dead ends: 213 [2022-11-20 10:56:26,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 316 SyntacticMatches, 105 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9895 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=5885, Invalid=19875, Unknown=0, NotChecked=0, Total=25760 [2022-11-20 10:56:26,145 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 9 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:56:26,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 505 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1008 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 10:56:26,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-11-20 10:56:26,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2022-11-20 10:56:26,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.009433962264151) internal successors, (214), 212 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:26,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 214 transitions. [2022-11-20 10:56:26,211 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 214 transitions. Word has length 211 [2022-11-20 10:56:26,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:56:26,211 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 214 transitions. [2022-11-20 10:56:26,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.9722222222222223) internal successors, (213), 108 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:26,211 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 214 transitions. [2022-11-20 10:56:26,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-11-20 10:56:26,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:56:26,212 INFO L195 NwaCegarLoop]: trace histogram [52, 52, 51, 51, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:26,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-11-20 10:56:26,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-11-20 10:56:26,415 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:56:26,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:26,415 INFO L85 PathProgramCache]: Analyzing trace with hash 410910600, now seen corresponding path program 102 times [2022-11-20 10:56:26,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:56:26,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465569092] [2022-11-20 10:56:26,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:56:26,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:56:26,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:29,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5305 backedges. 1326 proven. 3979 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:56:29,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:56:29,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465569092] [2022-11-20 10:56:29,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465569092] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:56:29,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324409019] [2022-11-20 10:56:29,054 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:56:29,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:56:29,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:56:29,055 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:56:29,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-11-20 10:56:29,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2022-11-20 10:56:29,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:56:29,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 808 conjuncts, 110 conjunts are in the unsatisfiable core [2022-11-20 10:56:29,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:56:29,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5305 backedges. 1378 proven. 3927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:56:29,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:56:32,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5305 backedges. 1378 proven. 3927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:56:32,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324409019] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:56:32,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:56:32,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 58 [2022-11-20 10:56:32,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085609526] [2022-11-20 10:56:32,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:56:32,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-20 10:56:32,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:56:32,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-20 10:56:32,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1493, Invalid=1813, Unknown=0, NotChecked=0, Total=3306 [2022-11-20 10:56:32,253 INFO L87 Difference]: Start difference. First operand 213 states and 214 transitions. Second operand has 58 states, 58 states have (on average 3.7241379310344827) internal successors, (216), 58 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:33,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:56:33,731 INFO L93 Difference]: Finished difference Result 224 states and 225 transitions. [2022-11-20 10:56:33,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-11-20 10:56:33,732 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.7241379310344827) internal successors, (216), 58 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 212 [2022-11-20 10:56:33,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:56:33,732 INFO L225 Difference]: With dead ends: 224 [2022-11-20 10:56:33,733 INFO L226 Difference]: Without dead ends: 222 [2022-11-20 10:56:33,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 369 SyntacticMatches, 104 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5974 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4571, Invalid=7861, Unknown=0, NotChecked=0, Total=12432 [2022-11-20 10:56:33,734 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 228 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:56:33,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 44 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:56:33,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-11-20 10:56:33,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 216. [2022-11-20 10:56:33,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.0093023255813953) internal successors, (217), 215 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:33,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 217 transitions. [2022-11-20 10:56:33,825 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 217 transitions. Word has length 212 [2022-11-20 10:56:33,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:56:33,826 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 217 transitions. [2022-11-20 10:56:33,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.7241379310344827) internal successors, (216), 58 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:33,826 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 217 transitions. [2022-11-20 10:56:33,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-11-20 10:56:33,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:56:33,827 INFO L195 NwaCegarLoop]: trace histogram [53, 52, 52, 52, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:33,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-11-20 10:56:34,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-11-20 10:56:34,028 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:56:34,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:34,028 INFO L85 PathProgramCache]: Analyzing trace with hash 785711281, now seen corresponding path program 103 times [2022-11-20 10:56:34,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:56:34,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91356037] [2022-11-20 10:56:34,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:56:34,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:56:34,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:39,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 4082 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:56:39,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:56:39,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91356037] [2022-11-20 10:56:39,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91356037] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:56:39,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250072136] [2022-11-20 10:56:39,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:56:39,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:56:39,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:56:39,260 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:56:39,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-11-20 10:56:39,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:39,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 108 conjunts are in the unsatisfiable core [2022-11-20 10:56:39,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:56:39,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 4082 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:56:39,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:56:43,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 4082 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:56:43,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250072136] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:56:43,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:56:43,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109, 109] total 110 [2022-11-20 10:56:43,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548692053] [2022-11-20 10:56:43,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:56:43,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-11-20 10:56:43,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:56:43,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-11-20 10:56:43,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3026, Invalid=8964, Unknown=0, NotChecked=0, Total=11990 [2022-11-20 10:56:43,532 INFO L87 Difference]: Start difference. First operand 216 states and 217 transitions. Second operand has 110 states, 110 states have (on average 1.9727272727272727) internal successors, (217), 110 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:46,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:56:46,429 INFO L93 Difference]: Finished difference Result 380 states and 382 transitions. [2022-11-20 10:56:46,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-11-20 10:56:46,429 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.9727272727272727) internal successors, (217), 110 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 215 [2022-11-20 10:56:46,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:56:46,430 INFO L225 Difference]: With dead ends: 380 [2022-11-20 10:56:46,430 INFO L226 Difference]: Without dead ends: 217 [2022-11-20 10:56:46,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 322 SyntacticMatches, 107 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10271 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=6104, Invalid=20628, Unknown=0, NotChecked=0, Total=26732 [2022-11-20 10:56:46,432 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 9 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:56:46,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 407 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 10:56:46,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-11-20 10:56:46,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2022-11-20 10:56:46,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.0092592592592593) internal successors, (218), 216 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:46,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 218 transitions. [2022-11-20 10:56:46,497 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 218 transitions. Word has length 215 [2022-11-20 10:56:46,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:56:46,497 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 218 transitions. [2022-11-20 10:56:46,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.9727272727272727) internal successors, (217), 110 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:46,497 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 218 transitions. [2022-11-20 10:56:46,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-11-20 10:56:46,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:56:46,498 INFO L195 NwaCegarLoop]: trace histogram [53, 53, 52, 52, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:46,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-11-20 10:56:46,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:56:46,698 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:56:46,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:46,698 INFO L85 PathProgramCache]: Analyzing trace with hash -138643220, now seen corresponding path program 104 times [2022-11-20 10:56:46,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:56:46,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105631458] [2022-11-20 10:56:46,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:56:46,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:56:46,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:49,570 INFO L134 CoverageAnalysis]: Checked inductivity of 5513 backedges. 1378 proven. 4135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:56:49,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:56:49,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105631458] [2022-11-20 10:56:49,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105631458] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:56:49,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154559852] [2022-11-20 10:56:49,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:56:49,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:56:49,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:56:49,575 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:56:49,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-11-20 10:56:49,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:56:49,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:56:49,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 112 conjunts are in the unsatisfiable core [2022-11-20 10:56:49,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:56:50,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5513 backedges. 1431 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:56:50,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:56:52,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5513 backedges. 1431 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:56:52,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154559852] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:56:52,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:56:52,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 59 [2022-11-20 10:56:52,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736255160] [2022-11-20 10:56:52,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:56:52,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-20 10:56:52,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:56:52,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-20 10:56:52,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1548, Invalid=1874, Unknown=0, NotChecked=0, Total=3422 [2022-11-20 10:56:52,660 INFO L87 Difference]: Start difference. First operand 217 states and 218 transitions. Second operand has 59 states, 59 states have (on average 3.7288135593220337) internal successors, (220), 59 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:54,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:56:54,172 INFO L93 Difference]: Finished difference Result 228 states and 229 transitions. [2022-11-20 10:56:54,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-11-20 10:56:54,173 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.7288135593220337) internal successors, (220), 59 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 216 [2022-11-20 10:56:54,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:56:54,174 INFO L225 Difference]: With dead ends: 228 [2022-11-20 10:56:54,174 INFO L226 Difference]: Without dead ends: 226 [2022-11-20 10:56:54,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 376 SyntacticMatches, 106 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6195 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4738, Invalid=8144, Unknown=0, NotChecked=0, Total=12882 [2022-11-20 10:56:54,175 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 436 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:56:54,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 32 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 10:56:54,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-11-20 10:56:54,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 220. [2022-11-20 10:56:54,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.0091324200913243) internal successors, (221), 219 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:54,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 221 transitions. [2022-11-20 10:56:54,258 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 221 transitions. Word has length 216 [2022-11-20 10:56:54,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:56:54,258 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 221 transitions. [2022-11-20 10:56:54,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.7288135593220337) internal successors, (220), 59 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:54,259 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 221 transitions. [2022-11-20 10:56:54,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-11-20 10:56:54,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:56:54,260 INFO L195 NwaCegarLoop]: trace histogram [54, 53, 53, 53, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:54,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-11-20 10:56:54,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-11-20 10:56:54,460 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:56:54,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:54,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1443192013, now seen corresponding path program 105 times [2022-11-20 10:56:54,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:56:54,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445106202] [2022-11-20 10:56:54,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:56:54,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:56:54,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:59,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 4240 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:56:59,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:56:59,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445106202] [2022-11-20 10:56:59,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445106202] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:56:59,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458715354] [2022-11-20 10:56:59,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:56:59,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:56:59,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:56:59,761 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:56:59,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-11-20 10:57:00,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2022-11-20 10:57:00,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:57:00,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 110 conjunts are in the unsatisfiable core [2022-11-20 10:57:00,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:57:00,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 4240 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:57:00,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:57:04,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 4240 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:57:04,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458715354] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:57:04,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:57:04,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111, 111] total 112 [2022-11-20 10:57:04,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289021057] [2022-11-20 10:57:04,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:57:04,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-11-20 10:57:04,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:57:04,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-11-20 10:57:04,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3137, Invalid=9295, Unknown=0, NotChecked=0, Total=12432 [2022-11-20 10:57:04,338 INFO L87 Difference]: Start difference. First operand 220 states and 221 transitions. Second operand has 112 states, 112 states have (on average 1.9732142857142858) internal successors, (221), 112 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:07,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:07,458 INFO L93 Difference]: Finished difference Result 387 states and 389 transitions. [2022-11-20 10:57:07,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-11-20 10:57:07,458 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.9732142857142858) internal successors, (221), 112 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 219 [2022-11-20 10:57:07,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:07,459 INFO L225 Difference]: With dead ends: 387 [2022-11-20 10:57:07,459 INFO L226 Difference]: Without dead ends: 221 [2022-11-20 10:57:07,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 328 SyntacticMatches, 109 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10654 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=6327, Invalid=21395, Unknown=0, NotChecked=0, Total=27722 [2022-11-20 10:57:07,461 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 9 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:07,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 579 Invalid, 1170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 10:57:07,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-11-20 10:57:07,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2022-11-20 10:57:07,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.009090909090909) internal successors, (222), 220 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:07,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 222 transitions. [2022-11-20 10:57:07,524 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 222 transitions. Word has length 219 [2022-11-20 10:57:07,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:07,524 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 222 transitions. [2022-11-20 10:57:07,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 1.9732142857142858) internal successors, (221), 112 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:07,525 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 222 transitions. [2022-11-20 10:57:07,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-11-20 10:57:07,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:07,526 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 53, 53, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:07,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-11-20 10:57:07,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-11-20 10:57:07,731 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:57:07,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:07,731 INFO L85 PathProgramCache]: Analyzing trace with hash -240107640, now seen corresponding path program 106 times [2022-11-20 10:57:07,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:57:07,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322574391] [2022-11-20 10:57:07,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:57:07,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:57:07,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:10,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5725 backedges. 1431 proven. 4294 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:57:10,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:57:10,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322574391] [2022-11-20 10:57:10,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322574391] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:57:10,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405084349] [2022-11-20 10:57:10,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:57:10,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:57:10,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:57:10,588 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:57:10,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-11-20 10:57:10,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:57:10,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:57:10,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 114 conjunts are in the unsatisfiable core [2022-11-20 10:57:10,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:57:11,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5725 backedges. 1485 proven. 4240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:57:11,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:57:13,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5725 backedges. 1485 proven. 4240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:57:13,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405084349] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:57:13,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:57:13,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 60 [2022-11-20 10:57:13,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851751596] [2022-11-20 10:57:13,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:57:13,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-20 10:57:13,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:57:13,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-20 10:57:13,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1604, Invalid=1936, Unknown=0, NotChecked=0, Total=3540 [2022-11-20 10:57:13,934 INFO L87 Difference]: Start difference. First operand 221 states and 222 transitions. Second operand has 60 states, 60 states have (on average 3.7333333333333334) internal successors, (224), 60 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:15,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:15,499 INFO L93 Difference]: Finished difference Result 232 states and 233 transitions. [2022-11-20 10:57:15,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-11-20 10:57:15,500 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.7333333333333334) internal successors, (224), 60 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 220 [2022-11-20 10:57:15,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:15,500 INFO L225 Difference]: With dead ends: 232 [2022-11-20 10:57:15,500 INFO L226 Difference]: Without dead ends: 230 [2022-11-20 10:57:15,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 383 SyntacticMatches, 108 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6420 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4908, Invalid=8432, Unknown=0, NotChecked=0, Total=13340 [2022-11-20 10:57:15,501 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 338 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:15,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 33 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:57:15,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-20 10:57:15,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 224. [2022-11-20 10:57:15,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.0089686098654709) internal successors, (225), 223 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:15,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 225 transitions. [2022-11-20 10:57:15,567 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 225 transitions. Word has length 220 [2022-11-20 10:57:15,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:15,568 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 225 transitions. [2022-11-20 10:57:15,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.7333333333333334) internal successors, (224), 60 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:15,568 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 225 transitions. [2022-11-20 10:57:15,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-11-20 10:57:15,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:15,568 INFO L195 NwaCegarLoop]: trace histogram [55, 54, 54, 54, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:15,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-11-20 10:57:15,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-11-20 10:57:15,769 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:57:15,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:15,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1921335119, now seen corresponding path program 107 times [2022-11-20 10:57:15,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:57:15,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128207109] [2022-11-20 10:57:15,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:57:15,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:57:15,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:21,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 4401 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:57:21,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:57:21,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128207109] [2022-11-20 10:57:21,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128207109] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:57:21,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555918065] [2022-11-20 10:57:21,092 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:57:21,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:57:21,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:57:21,093 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:57:21,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-11-20 10:57:21,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2022-11-20 10:57:21,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:57:21,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 112 conjunts are in the unsatisfiable core [2022-11-20 10:57:21,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:57:21,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 4401 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:57:21,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:57:25,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 4401 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:57:25,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555918065] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:57:25,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:57:25,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113, 113] total 114 [2022-11-20 10:57:25,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809868557] [2022-11-20 10:57:25,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:57:25,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-11-20 10:57:25,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:57:25,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-11-20 10:57:25,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3250, Invalid=9632, Unknown=0, NotChecked=0, Total=12882 [2022-11-20 10:57:25,681 INFO L87 Difference]: Start difference. First operand 224 states and 225 transitions. Second operand has 114 states, 114 states have (on average 1.9736842105263157) internal successors, (225), 114 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:29,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:29,025 INFO L93 Difference]: Finished difference Result 394 states and 396 transitions. [2022-11-20 10:57:29,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-11-20 10:57:29,025 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 1.9736842105263157) internal successors, (225), 114 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 223 [2022-11-20 10:57:29,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:29,026 INFO L225 Difference]: With dead ends: 394 [2022-11-20 10:57:29,026 INFO L226 Difference]: Without dead ends: 225 [2022-11-20 10:57:29,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 334 SyntacticMatches, 111 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11044 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=6554, Invalid=22176, Unknown=0, NotChecked=0, Total=28730 [2022-11-20 10:57:29,028 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 9 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:29,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 546 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1097 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 10:57:29,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-11-20 10:57:29,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2022-11-20 10:57:29,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.0089285714285714) internal successors, (226), 224 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:29,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 226 transitions. [2022-11-20 10:57:29,114 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 226 transitions. Word has length 223 [2022-11-20 10:57:29,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:29,114 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 226 transitions. [2022-11-20 10:57:29,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 1.9736842105263157) internal successors, (225), 114 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:29,114 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 226 transitions. [2022-11-20 10:57:29,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-11-20 10:57:29,115 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:29,115 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 54, 54, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:29,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-11-20 10:57:29,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:57:29,316 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:57:29,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:29,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1087386132, now seen corresponding path program 108 times [2022-11-20 10:57:29,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:57:29,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652237223] [2022-11-20 10:57:29,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:57:29,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:57:29,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:32,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 1485 proven. 4456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:57:32,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:57:32,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652237223] [2022-11-20 10:57:32,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652237223] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:57:32,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568910576] [2022-11-20 10:57:32,411 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:57:32,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:57:32,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:57:32,412 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:57:32,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-11-20 10:57:32,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2022-11-20 10:57:32,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:57:32,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 116 conjunts are in the unsatisfiable core [2022-11-20 10:57:32,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:57:33,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 1540 proven. 4401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:57:33,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:57:35,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 1540 proven. 4401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:57:35,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568910576] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:57:35,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:57:35,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 61 [2022-11-20 10:57:35,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873499812] [2022-11-20 10:57:35,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:57:35,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-20 10:57:35,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:57:35,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-20 10:57:35,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1661, Invalid=1999, Unknown=0, NotChecked=0, Total=3660 [2022-11-20 10:57:35,885 INFO L87 Difference]: Start difference. First operand 225 states and 226 transitions. Second operand has 61 states, 61 states have (on average 3.737704918032787) internal successors, (228), 61 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:37,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:37,422 INFO L93 Difference]: Finished difference Result 236 states and 237 transitions. [2022-11-20 10:57:37,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-11-20 10:57:37,423 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.737704918032787) internal successors, (228), 61 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 224 [2022-11-20 10:57:37,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:37,423 INFO L225 Difference]: With dead ends: 236 [2022-11-20 10:57:37,424 INFO L226 Difference]: Without dead ends: 234 [2022-11-20 10:57:37,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 390 SyntacticMatches, 110 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6649 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=5081, Invalid=8725, Unknown=0, NotChecked=0, Total=13806 [2022-11-20 10:57:37,426 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 346 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:37,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 26 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:57:37,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-20 10:57:37,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 228. [2022-11-20 10:57:37,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.0088105726872247) internal successors, (229), 227 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:37,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 229 transitions. [2022-11-20 10:57:37,499 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 229 transitions. Word has length 224 [2022-11-20 10:57:37,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:37,499 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 229 transitions. [2022-11-20 10:57:37,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.737704918032787) internal successors, (228), 61 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:37,499 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 229 transitions. [2022-11-20 10:57:37,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-11-20 10:57:37,500 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:37,500 INFO L195 NwaCegarLoop]: trace histogram [56, 55, 55, 55, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:37,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-11-20 10:57:37,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:57:37,701 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:57:37,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:37,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1672091699, now seen corresponding path program 109 times [2022-11-20 10:57:37,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:57:37,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141631689] [2022-11-20 10:57:37,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:57:37,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:57:37,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:43,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 4565 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:57:43,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:57:43,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141631689] [2022-11-20 10:57:43,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141631689] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:57:43,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225693692] [2022-11-20 10:57:43,289 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:57:43,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:57:43,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:57:43,290 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:57:43,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-11-20 10:57:43,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:43,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 114 conjunts are in the unsatisfiable core [2022-11-20 10:57:43,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:57:43,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 4565 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:57:43,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:57:48,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 4565 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:57:48,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225693692] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:57:48,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:57:48,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115, 115] total 116 [2022-11-20 10:57:48,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768462850] [2022-11-20 10:57:48,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:57:48,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-11-20 10:57:48,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:57:48,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-11-20 10:57:48,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3365, Invalid=9975, Unknown=0, NotChecked=0, Total=13340 [2022-11-20 10:57:48,466 INFO L87 Difference]: Start difference. First operand 228 states and 229 transitions. Second operand has 116 states, 116 states have (on average 1.9741379310344827) internal successors, (229), 116 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:52,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:52,195 INFO L93 Difference]: Finished difference Result 401 states and 403 transitions. [2022-11-20 10:57:52,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-11-20 10:57:52,195 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.9741379310344827) internal successors, (229), 116 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 227 [2022-11-20 10:57:52,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:52,196 INFO L225 Difference]: With dead ends: 401 [2022-11-20 10:57:52,196 INFO L226 Difference]: Without dead ends: 229 [2022-11-20 10:57:52,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 340 SyntacticMatches, 113 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11441 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=6785, Invalid=22971, Unknown=0, NotChecked=0, Total=29756 [2022-11-20 10:57:52,199 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 9 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:52,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 513 Invalid, 1037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 10:57:52,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-11-20 10:57:52,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2022-11-20 10:57:52,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.0087719298245614) internal successors, (230), 228 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:52,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 230 transitions. [2022-11-20 10:57:52,288 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 230 transitions. Word has length 227 [2022-11-20 10:57:52,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:52,289 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 230 transitions. [2022-11-20 10:57:52,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.9741379310344827) internal successors, (229), 116 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:52,289 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 230 transitions. [2022-11-20 10:57:52,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-11-20 10:57:52,290 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:52,290 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 55, 55, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:52,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-11-20 10:57:52,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:57:52,491 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:57:52,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:52,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1510219896, now seen corresponding path program 110 times [2022-11-20 10:57:52,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:57:52,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209376126] [2022-11-20 10:57:52,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:57:52,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:57:52,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:56,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6161 backedges. 1540 proven. 4621 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:57:56,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:57:56,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209376126] [2022-11-20 10:57:56,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209376126] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:57:56,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693988108] [2022-11-20 10:57:56,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:57:56,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:57:56,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:57:56,042 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:57:56,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-11-20 10:57:56,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:57:56,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:57:56,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 868 conjuncts, 118 conjunts are in the unsatisfiable core [2022-11-20 10:57:56,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:57:56,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6161 backedges. 1596 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:57:56,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:57:59,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6161 backedges. 1596 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:57:59,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693988108] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:57:59,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:57:59,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 62 [2022-11-20 10:57:59,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917454632] [2022-11-20 10:57:59,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:57:59,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-20 10:57:59,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:57:59,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-20 10:57:59,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1719, Invalid=2063, Unknown=0, NotChecked=0, Total=3782 [2022-11-20 10:57:59,906 INFO L87 Difference]: Start difference. First operand 229 states and 230 transitions. Second operand has 62 states, 62 states have (on average 3.7419354838709675) internal successors, (232), 62 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:01,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:01,476 INFO L93 Difference]: Finished difference Result 240 states and 241 transitions. [2022-11-20 10:58:01,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-11-20 10:58:01,477 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.7419354838709675) internal successors, (232), 62 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 228 [2022-11-20 10:58:01,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:01,477 INFO L225 Difference]: With dead ends: 240 [2022-11-20 10:58:01,477 INFO L226 Difference]: Without dead ends: 238 [2022-11-20 10:58:01,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 397 SyntacticMatches, 112 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6882 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=5257, Invalid=9023, Unknown=0, NotChecked=0, Total=14280 [2022-11-20 10:58:01,479 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 348 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:01,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 39 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:58:01,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-11-20 10:58:01,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 232. [2022-11-20 10:58:01,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.0086580086580086) internal successors, (233), 231 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:01,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 233 transitions. [2022-11-20 10:58:01,548 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 233 transitions. Word has length 228 [2022-11-20 10:58:01,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:01,548 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 233 transitions. [2022-11-20 10:58:01,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.7419354838709675) internal successors, (232), 62 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:01,548 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 233 transitions. [2022-11-20 10:58:01,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-11-20 10:58:01,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:01,549 INFO L195 NwaCegarLoop]: trace histogram [57, 56, 56, 56, 1, 1, 1, 1, 1, 1] [2022-11-20 10:58:01,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-11-20 10:58:01,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-11-20 10:58:01,750 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:58:01,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:01,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1173675855, now seen corresponding path program 111 times [2022-11-20 10:58:01,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:58:01,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196956916] [2022-11-20 10:58:01,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:58:01,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:58:01,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:58:08,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 4732 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:58:08,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:58:08,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196956916] [2022-11-20 10:58:08,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196956916] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:58:08,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985802008] [2022-11-20 10:58:08,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:58:08,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:58:08,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:58:08,236 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:58:08,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-11-20 10:58:08,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2022-11-20 10:58:08,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:58:08,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 116 conjunts are in the unsatisfiable core [2022-11-20 10:58:08,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:58:09,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 4732 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:58:09,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:58:14,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 4732 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:58:14,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985802008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:58:14,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:58:14,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117, 117] total 118 [2022-11-20 10:58:14,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496157463] [2022-11-20 10:58:14,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:58:14,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-11-20 10:58:14,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:58:14,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-11-20 10:58:14,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3482, Invalid=10324, Unknown=0, NotChecked=0, Total=13806 [2022-11-20 10:58:14,034 INFO L87 Difference]: Start difference. First operand 232 states and 233 transitions. Second operand has 118 states, 118 states have (on average 1.9745762711864407) internal successors, (233), 118 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:17,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:17,994 INFO L93 Difference]: Finished difference Result 408 states and 410 transitions. [2022-11-20 10:58:17,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-11-20 10:58:17,994 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.9745762711864407) internal successors, (233), 118 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 231 [2022-11-20 10:58:17,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:17,995 INFO L225 Difference]: With dead ends: 408 [2022-11-20 10:58:17,995 INFO L226 Difference]: Without dead ends: 233 [2022-11-20 10:58:17,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 346 SyntacticMatches, 115 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11845 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=7020, Invalid=23780, Unknown=0, NotChecked=0, Total=30800 [2022-11-20 10:58:17,997 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 9 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:17,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 545 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 10:58:17,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-11-20 10:58:18,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2022-11-20 10:58:18,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.0086206896551724) internal successors, (234), 232 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:18,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 234 transitions. [2022-11-20 10:58:18,100 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 234 transitions. Word has length 231 [2022-11-20 10:58:18,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:18,100 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 234 transitions. [2022-11-20 10:58:18,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.9745762711864407) internal successors, (233), 118 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:18,101 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 234 transitions. [2022-11-20 10:58:18,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-11-20 10:58:18,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:18,102 INFO L195 NwaCegarLoop]: trace histogram [57, 57, 56, 56, 1, 1, 1, 1, 1, 1] [2022-11-20 10:58:18,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-11-20 10:58:18,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:58:18,307 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:58:18,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:18,307 INFO L85 PathProgramCache]: Analyzing trace with hash 203997932, now seen corresponding path program 112 times [2022-11-20 10:58:18,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:58:18,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227978224] [2022-11-20 10:58:18,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:58:18,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:58:18,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:58:21,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6385 backedges. 1596 proven. 4789 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:58:21,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:58:21,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227978224] [2022-11-20 10:58:21,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227978224] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:58:21,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7516695] [2022-11-20 10:58:21,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:58:21,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:58:21,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:58:21,927 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:58:21,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-11-20 10:58:22,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:58:22,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:58:22,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 120 conjunts are in the unsatisfiable core [2022-11-20 10:58:22,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:58:22,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6385 backedges. 1653 proven. 4732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:58:22,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:58:26,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6385 backedges. 1653 proven. 4732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:58:26,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7516695] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:58:26,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:58:26,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 63 [2022-11-20 10:58:26,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126326121] [2022-11-20 10:58:26,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:58:26,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-20 10:58:26,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:58:26,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-20 10:58:26,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1778, Invalid=2128, Unknown=0, NotChecked=0, Total=3906 [2022-11-20 10:58:26,070 INFO L87 Difference]: Start difference. First operand 233 states and 234 transitions. Second operand has 63 states, 63 states have (on average 3.746031746031746) internal successors, (236), 63 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:28,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:28,044 INFO L93 Difference]: Finished difference Result 244 states and 245 transitions. [2022-11-20 10:58:28,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-11-20 10:58:28,044 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.746031746031746) internal successors, (236), 63 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 232 [2022-11-20 10:58:28,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:28,045 INFO L225 Difference]: With dead ends: 244 [2022-11-20 10:58:28,045 INFO L226 Difference]: Without dead ends: 242 [2022-11-20 10:58:28,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 404 SyntacticMatches, 114 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7119 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=5436, Invalid=9326, Unknown=0, NotChecked=0, Total=14762 [2022-11-20 10:58:28,046 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 242 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:28,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 56 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 10:58:28,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-20 10:58:28,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 236. [2022-11-20 10:58:28,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.0085106382978724) internal successors, (237), 235 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:28,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 237 transitions. [2022-11-20 10:58:28,201 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 237 transitions. Word has length 232 [2022-11-20 10:58:28,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:28,201 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 237 transitions. [2022-11-20 10:58:28,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.746031746031746) internal successors, (236), 63 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:28,201 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 237 transitions. [2022-11-20 10:58:28,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-11-20 10:58:28,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:28,202 INFO L195 NwaCegarLoop]: trace histogram [58, 57, 57, 57, 1, 1, 1, 1, 1, 1] [2022-11-20 10:58:28,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-11-20 10:58:28,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-11-20 10:58:28,403 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:58:28,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:28,403 INFO L85 PathProgramCache]: Analyzing trace with hash -71511347, now seen corresponding path program 113 times [2022-11-20 10:58:28,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:58:28,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736010027] [2022-11-20 10:58:28,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:58:28,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:58:28,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:58:35,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 4902 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:58:35,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:58:35,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736010027] [2022-11-20 10:58:35,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736010027] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:58:35,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546508236] [2022-11-20 10:58:35,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:58:35,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:58:35,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:58:35,815 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:58:35,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-11-20 10:58:36,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2022-11-20 10:58:36,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:58:36,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 118 conjunts are in the unsatisfiable core [2022-11-20 10:58:36,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:58:36,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 4902 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:58:36,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:58:41,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 4902 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:58:41,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546508236] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:58:41,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:58:41,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 119, 119] total 120 [2022-11-20 10:58:41,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703201522] [2022-11-20 10:58:41,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:58:41,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-11-20 10:58:41,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:58:41,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-11-20 10:58:41,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3601, Invalid=10679, Unknown=0, NotChecked=0, Total=14280 [2022-11-20 10:58:41,488 INFO L87 Difference]: Start difference. First operand 236 states and 237 transitions. Second operand has 120 states, 120 states have (on average 1.975) internal successors, (237), 120 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:45,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:45,300 INFO L93 Difference]: Finished difference Result 415 states and 417 transitions. [2022-11-20 10:58:45,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-11-20 10:58:45,300 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 1.975) internal successors, (237), 120 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 235 [2022-11-20 10:58:45,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:45,301 INFO L225 Difference]: With dead ends: 415 [2022-11-20 10:58:45,301 INFO L226 Difference]: Without dead ends: 237 [2022-11-20 10:58:45,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 646 GetRequests, 352 SyntacticMatches, 117 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12256 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=7259, Invalid=24603, Unknown=0, NotChecked=0, Total=31862 [2022-11-20 10:58:45,305 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 9 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:45,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 408 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 835 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 10:58:45,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-11-20 10:58:45,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2022-11-20 10:58:45,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.0084745762711864) internal successors, (238), 236 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:45,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 238 transitions. [2022-11-20 10:58:45,399 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 238 transitions. Word has length 235 [2022-11-20 10:58:45,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:45,399 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 238 transitions. [2022-11-20 10:58:45,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 1.975) internal successors, (237), 120 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:45,400 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 238 transitions. [2022-11-20 10:58:45,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-11-20 10:58:45,401 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:45,401 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 57, 57, 1, 1, 1, 1, 1, 1] [2022-11-20 10:58:45,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-11-20 10:58:45,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-11-20 10:58:45,601 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:58:45,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:45,602 INFO L85 PathProgramCache]: Analyzing trace with hash -445063288, now seen corresponding path program 114 times [2022-11-20 10:58:45,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:58:45,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625348263] [2022-11-20 10:58:45,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:58:45,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:58:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:58:49,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6613 backedges. 1653 proven. 4960 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:58:49,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:58:49,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625348263] [2022-11-20 10:58:49,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625348263] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:58:49,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447289278] [2022-11-20 10:58:49,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:58:49,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:58:49,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:58:49,517 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:58:49,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-11-20 10:58:49,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 58 check-sat command(s) [2022-11-20 10:58:49,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:58:49,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 122 conjunts are in the unsatisfiable core [2022-11-20 10:58:49,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:58:50,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6613 backedges. 1711 proven. 4902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:58:50,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:58:53,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6613 backedges. 1711 proven. 4902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:58:53,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447289278] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:58:53,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:58:53,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 64 [2022-11-20 10:58:53,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982997180] [2022-11-20 10:58:53,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:58:53,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-20 10:58:53,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:58:53,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-20 10:58:53,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1838, Invalid=2194, Unknown=0, NotChecked=0, Total=4032 [2022-11-20 10:58:53,851 INFO L87 Difference]: Start difference. First operand 237 states and 238 transitions. Second operand has 64 states, 64 states have (on average 3.75) internal successors, (240), 64 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:55,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:55,833 INFO L93 Difference]: Finished difference Result 248 states and 249 transitions. [2022-11-20 10:58:55,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-11-20 10:58:55,833 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.75) internal successors, (240), 64 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 236 [2022-11-20 10:58:55,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:55,834 INFO L225 Difference]: With dead ends: 248 [2022-11-20 10:58:55,834 INFO L226 Difference]: Without dead ends: 246 [2022-11-20 10:58:55,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 411 SyntacticMatches, 116 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7360 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=5618, Invalid=9634, Unknown=0, NotChecked=0, Total=15252 [2022-11-20 10:58:55,835 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 360 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:55,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 38 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 10:58:55,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-11-20 10:58:55,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 240. [2022-11-20 10:58:55,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.00836820083682) internal successors, (241), 239 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:55,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 241 transitions. [2022-11-20 10:58:55,946 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 241 transitions. Word has length 236 [2022-11-20 10:58:55,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:55,947 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 241 transitions. [2022-11-20 10:58:55,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.75) internal successors, (240), 64 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:55,947 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 241 transitions. [2022-11-20 10:58:55,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-11-20 10:58:55,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:55,948 INFO L195 NwaCegarLoop]: trace histogram [59, 58, 58, 58, 1, 1, 1, 1, 1, 1] [2022-11-20 10:58:55,954 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-11-20 10:58:56,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-11-20 10:58:56,148 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:58:56,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:56,149 INFO L85 PathProgramCache]: Analyzing trace with hash -311549775, now seen corresponding path program 115 times [2022-11-20 10:58:56,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:58:56,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918007128] [2022-11-20 10:58:56,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:58:56,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:58:56,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:02,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 5075 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:59:02,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:59:02,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918007128] [2022-11-20 10:59:02,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918007128] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:59:02,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670992712] [2022-11-20 10:59:02,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:59:02,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:59:02,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:59:02,855 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:59:02,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-11-20 10:59:03,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:03,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 120 conjunts are in the unsatisfiable core [2022-11-20 10:59:03,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:59:03,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 5075 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:59:03,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:59:08,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 5075 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:59:08,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670992712] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:59:08,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:59:08,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121, 121] total 122 [2022-11-20 10:59:08,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594332124] [2022-11-20 10:59:08,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:59:08,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-11-20 10:59:08,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:59:08,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-11-20 10:59:08,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3722, Invalid=11040, Unknown=0, NotChecked=0, Total=14762 [2022-11-20 10:59:08,325 INFO L87 Difference]: Start difference. First operand 240 states and 241 transitions. Second operand has 122 states, 122 states have (on average 1.9754098360655739) internal successors, (241), 122 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:12,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:59:12,414 INFO L93 Difference]: Finished difference Result 422 states and 424 transitions. [2022-11-20 10:59:12,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-11-20 10:59:12,414 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.9754098360655739) internal successors, (241), 122 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 239 [2022-11-20 10:59:12,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:59:12,415 INFO L225 Difference]: With dead ends: 422 [2022-11-20 10:59:12,415 INFO L226 Difference]: Without dead ends: 241 [2022-11-20 10:59:12,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 657 GetRequests, 358 SyntacticMatches, 119 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12674 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=7502, Invalid=25440, Unknown=0, NotChecked=0, Total=32942 [2022-11-20 10:59:12,418 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 9 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:59:12,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 620 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1267 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 10:59:12,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-11-20 10:59:12,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2022-11-20 10:59:12,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.0083333333333333) internal successors, (242), 240 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:12,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 242 transitions. [2022-11-20 10:59:12,503 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 242 transitions. Word has length 239 [2022-11-20 10:59:12,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:59:12,504 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 242 transitions. [2022-11-20 10:59:12,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.9754098360655739) internal successors, (241), 122 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:12,504 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 242 transitions. [2022-11-20 10:59:12,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-11-20 10:59:12,505 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:59:12,505 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 58, 58, 1, 1, 1, 1, 1, 1] [2022-11-20 10:59:12,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-11-20 10:59:12,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:59:12,713 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:59:12,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:12,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1284462572, now seen corresponding path program 116 times [2022-11-20 10:59:12,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:59:12,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801905087] [2022-11-20 10:59:12,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:59:12,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:59:12,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:17,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6845 backedges. 1711 proven. 5134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:59:17,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:59:17,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801905087] [2022-11-20 10:59:17,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801905087] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:59:17,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315478727] [2022-11-20 10:59:17,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:59:17,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:59:17,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:59:17,012 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:59:17,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-11-20 10:59:17,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:59:17,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:59:17,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 124 conjunts are in the unsatisfiable core [2022-11-20 10:59:17,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:59:17,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6845 backedges. 1770 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:59:17,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:59:21,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6845 backedges. 1770 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:59:21,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315478727] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:59:21,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:59:21,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 65 [2022-11-20 10:59:21,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107012869] [2022-11-20 10:59:21,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:59:21,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-20 10:59:21,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:59:21,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-20 10:59:21,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1899, Invalid=2261, Unknown=0, NotChecked=0, Total=4160 [2022-11-20 10:59:21,294 INFO L87 Difference]: Start difference. First operand 241 states and 242 transitions. Second operand has 65 states, 65 states have (on average 3.753846153846154) internal successors, (244), 65 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:23,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:59:23,190 INFO L93 Difference]: Finished difference Result 252 states and 253 transitions. [2022-11-20 10:59:23,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-11-20 10:59:23,190 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.753846153846154) internal successors, (244), 65 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 240 [2022-11-20 10:59:23,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:59:23,191 INFO L225 Difference]: With dead ends: 252 [2022-11-20 10:59:23,191 INFO L226 Difference]: Without dead ends: 250 [2022-11-20 10:59:23,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 660 GetRequests, 418 SyntacticMatches, 118 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7605 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=5803, Invalid=9947, Unknown=0, NotChecked=0, Total=15750 [2022-11-20 10:59:23,192 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 254 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:59:23,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 35 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 10:59:23,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-11-20 10:59:23,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 244. [2022-11-20 10:59:23,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.008230452674897) internal successors, (245), 243 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:23,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 245 transitions. [2022-11-20 10:59:23,269 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 245 transitions. Word has length 240 [2022-11-20 10:59:23,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:59:23,269 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 245 transitions. [2022-11-20 10:59:23,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.753846153846154) internal successors, (244), 65 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:23,269 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 245 transitions. [2022-11-20 10:59:23,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-20 10:59:23,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:59:23,270 INFO L195 NwaCegarLoop]: trace histogram [60, 59, 59, 59, 1, 1, 1, 1, 1, 1] [2022-11-20 10:59:23,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-11-20 10:59:23,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:59:23,471 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:59:23,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:23,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1565662669, now seen corresponding path program 117 times [2022-11-20 10:59:23,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:59:23,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682904054] [2022-11-20 10:59:23,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:59:23,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:59:23,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:29,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 5251 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:59:29,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:59:29,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682904054] [2022-11-20 10:59:29,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682904054] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:59:29,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492260120] [2022-11-20 10:59:29,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:59:29,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:59:29,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:59:29,866 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:59:29,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-11-20 10:59:30,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2022-11-20 10:59:30,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:59:30,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 923 conjuncts, 122 conjunts are in the unsatisfiable core [2022-11-20 10:59:30,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:59:30,636 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 5251 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:59:30,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:59:35,326 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 5251 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:59:35,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492260120] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:59:35,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:59:35,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123, 123] total 124 [2022-11-20 10:59:35,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141172824] [2022-11-20 10:59:35,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:59:35,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-11-20 10:59:35,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:59:35,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-11-20 10:59:35,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3845, Invalid=11407, Unknown=0, NotChecked=0, Total=15252 [2022-11-20 10:59:35,329 INFO L87 Difference]: Start difference. First operand 244 states and 245 transitions. Second operand has 124 states, 124 states have (on average 1.9758064516129032) internal successors, (245), 124 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:39,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:59:39,254 INFO L93 Difference]: Finished difference Result 429 states and 431 transitions. [2022-11-20 10:59:39,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-11-20 10:59:39,255 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 1.9758064516129032) internal successors, (245), 124 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 243 [2022-11-20 10:59:39,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:59:39,255 INFO L225 Difference]: With dead ends: 429 [2022-11-20 10:59:39,255 INFO L226 Difference]: Without dead ends: 245 [2022-11-20 10:59:39,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 668 GetRequests, 364 SyntacticMatches, 121 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13099 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=7749, Invalid=26291, Unknown=0, NotChecked=0, Total=34040 [2022-11-20 10:59:39,257 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 9 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 1532 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 1536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:59:39,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 748 Invalid, 1536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1532 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 10:59:39,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-11-20 10:59:39,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2022-11-20 10:59:39,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.0081967213114753) internal successors, (246), 244 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:39,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 246 transitions. [2022-11-20 10:59:39,351 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 246 transitions. Word has length 243 [2022-11-20 10:59:39,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:59:39,351 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 246 transitions. [2022-11-20 10:59:39,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 1.9758064516129032) internal successors, (245), 124 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:39,351 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 246 transitions. [2022-11-20 10:59:39,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-11-20 10:59:39,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:59:39,352 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 59, 59, 1, 1, 1, 1, 1, 1] [2022-11-20 10:59:39,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-11-20 10:59:39,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:59:39,553 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:59:39,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:39,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1312767880, now seen corresponding path program 118 times [2022-11-20 10:59:39,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:59:39,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250189994] [2022-11-20 10:59:39,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:59:39,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:59:39,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:43,074 INFO L134 CoverageAnalysis]: Checked inductivity of 7081 backedges. 1770 proven. 5311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:59:43,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:59:43,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250189994] [2022-11-20 10:59:43,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250189994] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:59:43,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195031605] [2022-11-20 10:59:43,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:59:43,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:59:43,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:59:43,075 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:59:43,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-11-20 10:59:43,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:59:43,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:59:43,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 928 conjuncts, 126 conjunts are in the unsatisfiable core [2022-11-20 10:59:43,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:59:43,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7081 backedges. 1830 proven. 5251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:59:43,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:59:46,984 INFO L134 CoverageAnalysis]: Checked inductivity of 7081 backedges. 1830 proven. 5251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:59:46,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195031605] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:59:46,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:59:46,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 66 [2022-11-20 10:59:46,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541467080] [2022-11-20 10:59:46,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:59:46,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 10:59:46,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:59:46,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 10:59:46,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1961, Invalid=2329, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 10:59:46,987 INFO L87 Difference]: Start difference. First operand 245 states and 246 transitions. Second operand has 66 states, 66 states have (on average 3.757575757575758) internal successors, (248), 66 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:48,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:59:48,807 INFO L93 Difference]: Finished difference Result 256 states and 257 transitions. [2022-11-20 10:59:48,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-11-20 10:59:48,807 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.757575757575758) internal successors, (248), 66 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 244 [2022-11-20 10:59:48,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:59:48,808 INFO L225 Difference]: With dead ends: 256 [2022-11-20 10:59:48,808 INFO L226 Difference]: Without dead ends: 254 [2022-11-20 10:59:48,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 425 SyntacticMatches, 120 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7854 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=5991, Invalid=10265, Unknown=0, NotChecked=0, Total=16256 [2022-11-20 10:59:48,810 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 380 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:59:48,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 36 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 10:59:48,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-11-20 10:59:48,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 248. [2022-11-20 10:59:48,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.008097165991903) internal successors, (249), 247 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:48,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 249 transitions. [2022-11-20 10:59:48,894 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 249 transitions. Word has length 244 [2022-11-20 10:59:48,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:59:48,894 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 249 transitions. [2022-11-20 10:59:48,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.757575757575758) internal successors, (248), 66 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:48,895 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 249 transitions. [2022-11-20 10:59:48,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-11-20 10:59:48,895 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:59:48,895 INFO L195 NwaCegarLoop]: trace histogram [61, 60, 60, 60, 1, 1, 1, 1, 1, 1] [2022-11-20 10:59:48,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-11-20 10:59:49,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:59:49,096 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:59:49,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:49,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1299464015, now seen corresponding path program 119 times [2022-11-20 10:59:49,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:59:49,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628225428] [2022-11-20 10:59:49,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:59:49,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:59:49,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:55,833 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 5430 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:59:55,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:59:55,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628225428] [2022-11-20 10:59:55,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628225428] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:59:55,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260461476] [2022-11-20 10:59:55,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:59:55,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:59:55,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:59:55,835 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:59:55,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-11-20 10:59:56,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2022-11-20 10:59:56,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:59:56,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 124 conjunts are in the unsatisfiable core [2022-11-20 10:59:56,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:59:56,542 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 5430 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:59:56,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:00:01,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 5430 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:00:01,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260461476] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:00:01,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:00:01,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125, 125] total 126 [2022-11-20 11:00:01,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79811516] [2022-11-20 11:00:01,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:00:01,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-11-20 11:00:01,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:00:01,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-11-20 11:00:01,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3970, Invalid=11780, Unknown=0, NotChecked=0, Total=15750 [2022-11-20 11:00:01,400 INFO L87 Difference]: Start difference. First operand 248 states and 249 transitions. Second operand has 126 states, 126 states have (on average 1.9761904761904763) internal successors, (249), 126 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:05,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:00:05,281 INFO L93 Difference]: Finished difference Result 436 states and 438 transitions. [2022-11-20 11:00:05,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-11-20 11:00:05,282 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 1.9761904761904763) internal successors, (249), 126 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 247 [2022-11-20 11:00:05,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:00:05,282 INFO L225 Difference]: With dead ends: 436 [2022-11-20 11:00:05,282 INFO L226 Difference]: Without dead ends: 249 [2022-11-20 11:00:05,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 679 GetRequests, 370 SyntacticMatches, 123 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13531 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=8000, Invalid=27156, Unknown=0, NotChecked=0, Total=35156 [2022-11-20 11:00:05,284 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 9 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:00:05,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 652 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1302 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 11:00:05,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-11-20 11:00:05,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2022-11-20 11:00:05,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.0080645161290323) internal successors, (250), 248 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:05,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 250 transitions. [2022-11-20 11:00:05,366 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 250 transitions. Word has length 247 [2022-11-20 11:00:05,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:00:05,366 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 250 transitions. [2022-11-20 11:00:05,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 1.9761904761904763) internal successors, (249), 126 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:05,367 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 250 transitions. [2022-11-20 11:00:05,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-11-20 11:00:05,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:00:05,368 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 60, 60, 1, 1, 1, 1, 1, 1] [2022-11-20 11:00:05,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-11-20 11:00:05,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:00:05,568 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:00:05,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:00:05,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1078693100, now seen corresponding path program 120 times [2022-11-20 11:00:05,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:00:05,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335813816] [2022-11-20 11:00:05,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:00:05,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:00:05,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:00:09,350 INFO L134 CoverageAnalysis]: Checked inductivity of 7321 backedges. 1830 proven. 5491 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:00:09,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:00:09,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335813816] [2022-11-20 11:00:09,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335813816] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:00:09,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487497126] [2022-11-20 11:00:09,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:00:09,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:00:09,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:00:09,352 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:00:09,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-11-20 11:00:09,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2022-11-20 11:00:09,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:00:09,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 128 conjunts are in the unsatisfiable core [2022-11-20 11:00:09,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:00:10,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7321 backedges. 1891 proven. 5430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:00:10,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:00:13,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7321 backedges. 1891 proven. 5430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:00:13,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487497126] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:00:13,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:00:13,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 67 [2022-11-20 11:00:13,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713814250] [2022-11-20 11:00:13,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:00:13,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-20 11:00:13,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:00:13,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-20 11:00:13,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2024, Invalid=2398, Unknown=0, NotChecked=0, Total=4422 [2022-11-20 11:00:13,409 INFO L87 Difference]: Start difference. First operand 249 states and 250 transitions. Second operand has 67 states, 67 states have (on average 3.7611940298507465) internal successors, (252), 67 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:15,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:00:15,216 INFO L93 Difference]: Finished difference Result 260 states and 261 transitions. [2022-11-20 11:00:15,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-11-20 11:00:15,216 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.7611940298507465) internal successors, (252), 67 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 248 [2022-11-20 11:00:15,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:00:15,217 INFO L225 Difference]: With dead ends: 260 [2022-11-20 11:00:15,217 INFO L226 Difference]: Without dead ends: 258 [2022-11-20 11:00:15,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 432 SyntacticMatches, 122 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8107 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=6182, Invalid=10588, Unknown=0, NotChecked=0, Total=16770 [2022-11-20 11:00:15,219 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 264 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:00:15,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 38 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:00:15,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-11-20 11:00:15,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 252. [2022-11-20 11:00:15,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.0079681274900398) internal successors, (253), 251 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:15,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 253 transitions. [2022-11-20 11:00:15,300 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 253 transitions. Word has length 248 [2022-11-20 11:00:15,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:00:15,300 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 253 transitions. [2022-11-20 11:00:15,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.7611940298507465) internal successors, (252), 67 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:15,301 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 253 transitions. [2022-11-20 11:00:15,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-11-20 11:00:15,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:00:15,301 INFO L195 NwaCegarLoop]: trace histogram [62, 61, 61, 61, 1, 1, 1, 1, 1, 1] [2022-11-20 11:00:15,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-11-20 11:00:15,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2022-11-20 11:00:15,507 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:00:15,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:00:15,507 INFO L85 PathProgramCache]: Analyzing trace with hash 405653709, now seen corresponding path program 121 times [2022-11-20 11:00:15,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:00:15,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195791416] [2022-11-20 11:00:15,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:00:15,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:00:15,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:00:22,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 5612 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:00:22,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:00:22,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195791416] [2022-11-20 11:00:22,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195791416] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:00:22,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640229774] [2022-11-20 11:00:22,286 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:00:22,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:00:22,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:00:22,287 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:00:22,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-11-20 11:00:22,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:00:22,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 953 conjuncts, 126 conjunts are in the unsatisfiable core [2022-11-20 11:00:22,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:00:22,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 5612 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:00:22,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:00:27,780 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 5612 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:00:27,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640229774] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:00:27,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:00:27,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 127, 127] total 128 [2022-11-20 11:00:27,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610728033] [2022-11-20 11:00:27,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:00:27,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-11-20 11:00:27,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:00:27,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-11-20 11:00:27,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=12159, Unknown=0, NotChecked=0, Total=16256 [2022-11-20 11:00:27,783 INFO L87 Difference]: Start difference. First operand 252 states and 253 transitions. Second operand has 128 states, 128 states have (on average 1.9765625) internal successors, (253), 128 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:31,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:00:31,615 INFO L93 Difference]: Finished difference Result 443 states and 445 transitions. [2022-11-20 11:00:31,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-11-20 11:00:31,616 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.9765625) internal successors, (253), 128 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 251 [2022-11-20 11:00:31,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:00:31,617 INFO L225 Difference]: With dead ends: 443 [2022-11-20 11:00:31,617 INFO L226 Difference]: Without dead ends: 253 [2022-11-20 11:00:31,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 690 GetRequests, 376 SyntacticMatches, 125 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13970 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=8255, Invalid=28035, Unknown=0, NotChecked=0, Total=36290 [2022-11-20 11:00:31,620 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 9 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 1135 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 1141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:00:31,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 567 Invalid, 1141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1135 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 11:00:31,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-11-20 11:00:31,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2022-11-20 11:00:31,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 1.007936507936508) internal successors, (254), 252 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:31,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 254 transitions. [2022-11-20 11:00:31,788 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 254 transitions. Word has length 251 [2022-11-20 11:00:31,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:00:31,789 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 254 transitions. [2022-11-20 11:00:31,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.9765625) internal successors, (253), 128 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:31,789 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 254 transitions. [2022-11-20 11:00:31,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-11-20 11:00:31,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:00:31,790 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 61, 61, 1, 1, 1, 1, 1, 1] [2022-11-20 11:00:31,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-11-20 11:00:31,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-11-20 11:00:31,997 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:00:31,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:00:31,997 INFO L85 PathProgramCache]: Analyzing trace with hash -328794232, now seen corresponding path program 122 times [2022-11-20 11:00:31,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:00:31,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840512077] [2022-11-20 11:00:31,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:00:31,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:00:32,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:00:36,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7565 backedges. 1891 proven. 5674 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:00:36,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:00:36,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840512077] [2022-11-20 11:00:36,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840512077] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:00:36,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795983154] [2022-11-20 11:00:36,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:00:36,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:00:36,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:00:36,029 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:00:36,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-11-20 11:00:36,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:00:36,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:00:36,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 130 conjunts are in the unsatisfiable core [2022-11-20 11:00:36,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:00:36,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7565 backedges. 1953 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:00:36,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:00:39,966 INFO L134 CoverageAnalysis]: Checked inductivity of 7565 backedges. 1953 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:00:39,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795983154] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:00:39,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:00:39,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 68 [2022-11-20 11:00:39,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278445527] [2022-11-20 11:00:39,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:00:39,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-20 11:00:39,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:00:39,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-20 11:00:39,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2088, Invalid=2468, Unknown=0, NotChecked=0, Total=4556 [2022-11-20 11:00:39,968 INFO L87 Difference]: Start difference. First operand 253 states and 254 transitions. Second operand has 68 states, 68 states have (on average 3.764705882352941) internal successors, (256), 68 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:41,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:00:41,794 INFO L93 Difference]: Finished difference Result 264 states and 265 transitions. [2022-11-20 11:00:41,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-11-20 11:00:41,795 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.764705882352941) internal successors, (256), 68 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 252 [2022-11-20 11:00:41,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:00:41,795 INFO L225 Difference]: With dead ends: 264 [2022-11-20 11:00:41,795 INFO L226 Difference]: Without dead ends: 262 [2022-11-20 11:00:41,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 439 SyntacticMatches, 124 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8364 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=6376, Invalid=10916, Unknown=0, NotChecked=0, Total=17292 [2022-11-20 11:00:41,796 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 384 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:00:41,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 35 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:00:41,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-11-20 11:00:41,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 256. [2022-11-20 11:00:41,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.007843137254902) internal successors, (257), 255 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:41,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 257 transitions. [2022-11-20 11:00:41,894 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 257 transitions. Word has length 252 [2022-11-20 11:00:41,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:00:41,894 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 257 transitions. [2022-11-20 11:00:41,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.764705882352941) internal successors, (256), 68 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:41,894 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 257 transitions. [2022-11-20 11:00:41,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-11-20 11:00:41,895 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:00:41,895 INFO L195 NwaCegarLoop]: trace histogram [63, 62, 62, 62, 1, 1, 1, 1, 1, 1] [2022-11-20 11:00:41,900 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-11-20 11:00:42,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-11-20 11:00:42,099 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:00:42,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:00:42,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1716256945, now seen corresponding path program 123 times [2022-11-20 11:00:42,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:00:42,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638249028] [2022-11-20 11:00:42,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:00:42,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:00:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:00:49,376 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 5797 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:00:49,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:00:49,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638249028] [2022-11-20 11:00:49,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638249028] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:00:49,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731902405] [2022-11-20 11:00:49,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:00:49,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:00:49,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:00:49,378 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:00:49,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-11-20 11:00:49,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2022-11-20 11:00:49,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:00:49,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 128 conjunts are in the unsatisfiable core [2022-11-20 11:00:49,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:00:50,178 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 5797 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:00:50,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:00:55,643 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 5797 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:00:55,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731902405] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:00:55,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:00:55,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129, 129] total 130 [2022-11-20 11:00:55,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11887729] [2022-11-20 11:00:55,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:00:55,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-20 11:00:55,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:00:55,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-20 11:00:55,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4226, Invalid=12544, Unknown=0, NotChecked=0, Total=16770 [2022-11-20 11:00:55,646 INFO L87 Difference]: Start difference. First operand 256 states and 257 transitions. Second operand has 130 states, 130 states have (on average 1.976923076923077) internal successors, (257), 130 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:59,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:00:59,874 INFO L93 Difference]: Finished difference Result 450 states and 452 transitions. [2022-11-20 11:00:59,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-11-20 11:00:59,875 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 1.976923076923077) internal successors, (257), 130 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 255 [2022-11-20 11:00:59,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:00:59,875 INFO L225 Difference]: With dead ends: 450 [2022-11-20 11:00:59,875 INFO L226 Difference]: Without dead ends: 257 [2022-11-20 11:00:59,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 701 GetRequests, 382 SyntacticMatches, 127 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14416 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=8514, Invalid=28928, Unknown=0, NotChecked=0, Total=37442 [2022-11-20 11:00:59,877 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 9 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 1271 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:00:59,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 620 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1271 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 11:00:59,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-11-20 11:00:59,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2022-11-20 11:00:59,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.0078125) internal successors, (258), 256 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:59,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 258 transitions. [2022-11-20 11:00:59,964 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 258 transitions. Word has length 255 [2022-11-20 11:00:59,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:00:59,964 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 258 transitions. [2022-11-20 11:00:59,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1.976923076923077) internal successors, (257), 130 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:59,965 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 258 transitions. [2022-11-20 11:00:59,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2022-11-20 11:00:59,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:00:59,966 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 62, 62, 1, 1, 1, 1, 1, 1] [2022-11-20 11:00:59,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-11-20 11:01:00,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-11-20 11:01:00,166 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:01:00,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:01:00,167 INFO L85 PathProgramCache]: Analyzing trace with hash 2034590188, now seen corresponding path program 124 times [2022-11-20 11:01:00,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:01:00,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020173510] [2022-11-20 11:01:00,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:00,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:01:00,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:04,152 INFO L134 CoverageAnalysis]: Checked inductivity of 7813 backedges. 1953 proven. 5860 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:01:04,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:01:04,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020173510] [2022-11-20 11:01:04,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020173510] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:01:04,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356379680] [2022-11-20 11:01:04,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:01:04,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:01:04,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:01:04,153 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:01:04,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-11-20 11:01:04,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:01:04,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:01:04,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 132 conjunts are in the unsatisfiable core [2022-11-20 11:01:04,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:01:04,744 INFO L134 CoverageAnalysis]: Checked inductivity of 7813 backedges. 2016 proven. 5797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:01:04,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:01:08,275 INFO L134 CoverageAnalysis]: Checked inductivity of 7813 backedges. 2016 proven. 5797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:01:08,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356379680] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:01:08,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:01:08,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 69 [2022-11-20 11:01:08,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726736868] [2022-11-20 11:01:08,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:01:08,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-20 11:01:08,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:01:08,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-20 11:01:08,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2153, Invalid=2539, Unknown=0, NotChecked=0, Total=4692 [2022-11-20 11:01:08,277 INFO L87 Difference]: Start difference. First operand 257 states and 258 transitions. Second operand has 69 states, 69 states have (on average 3.7681159420289854) internal successors, (260), 69 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:10,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:01:10,120 INFO L93 Difference]: Finished difference Result 268 states and 269 transitions. [2022-11-20 11:01:10,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-11-20 11:01:10,121 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.7681159420289854) internal successors, (260), 69 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 256 [2022-11-20 11:01:10,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:01:10,121 INFO L225 Difference]: With dead ends: 268 [2022-11-20 11:01:10,121 INFO L226 Difference]: Without dead ends: 266 [2022-11-20 11:01:10,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 446 SyntacticMatches, 126 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8625 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=6573, Invalid=11249, Unknown=0, NotChecked=0, Total=17822 [2022-11-20 11:01:10,123 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 526 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:01:10,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 37 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:01:10,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-20 11:01:10,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 260. [2022-11-20 11:01:10,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.0077220077220077) internal successors, (261), 259 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:10,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 261 transitions. [2022-11-20 11:01:10,211 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 261 transitions. Word has length 256 [2022-11-20 11:01:10,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:01:10,211 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 261 transitions. [2022-11-20 11:01:10,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.7681159420289854) internal successors, (260), 69 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:10,212 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 261 transitions. [2022-11-20 11:01:10,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-11-20 11:01:10,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:01:10,213 INFO L195 NwaCegarLoop]: trace histogram [64, 63, 63, 63, 1, 1, 1, 1, 1, 1] [2022-11-20 11:01:10,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-11-20 11:01:10,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-11-20 11:01:10,413 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:01:10,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:01:10,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1902629837, now seen corresponding path program 125 times [2022-11-20 11:01:10,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:01:10,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370488645] [2022-11-20 11:01:10,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:10,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:01:10,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:17,714 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 5985 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:01:17,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:01:17,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370488645] [2022-11-20 11:01:17,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370488645] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:01:17,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166748639] [2022-11-20 11:01:17,715 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:01:17,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:01:17,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:01:17,716 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:01:17,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-11-20 11:01:18,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2022-11-20 11:01:18,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:01:18,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 130 conjunts are in the unsatisfiable core [2022-11-20 11:01:18,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:01:18,451 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 5985 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:01:18,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:01:23,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 5985 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:01:23,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166748639] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:01:23,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:01:23,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131, 131] total 132 [2022-11-20 11:01:23,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122213433] [2022-11-20 11:01:23,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:01:23,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-11-20 11:01:23,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:01:23,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-11-20 11:01:23,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4357, Invalid=12935, Unknown=0, NotChecked=0, Total=17292 [2022-11-20 11:01:23,774 INFO L87 Difference]: Start difference. First operand 260 states and 261 transitions. Second operand has 132 states, 132 states have (on average 1.9772727272727273) internal successors, (261), 132 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:27,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:01:27,830 INFO L93 Difference]: Finished difference Result 457 states and 459 transitions. [2022-11-20 11:01:27,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-11-20 11:01:27,831 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 1.9772727272727273) internal successors, (261), 132 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 259 [2022-11-20 11:01:27,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:01:27,831 INFO L225 Difference]: With dead ends: 457 [2022-11-20 11:01:27,831 INFO L226 Difference]: Without dead ends: 261 [2022-11-20 11:01:27,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 712 GetRequests, 388 SyntacticMatches, 129 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14869 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=8777, Invalid=29835, Unknown=0, NotChecked=0, Total=38612 [2022-11-20 11:01:27,834 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 9 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 1049 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:01:27,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 514 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1049 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 11:01:27,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-11-20 11:01:27,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2022-11-20 11:01:27,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.0076923076923077) internal successors, (262), 260 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:27,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 262 transitions. [2022-11-20 11:01:27,929 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 262 transitions. Word has length 259 [2022-11-20 11:01:27,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:01:27,929 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 262 transitions. [2022-11-20 11:01:27,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 1.9772727272727273) internal successors, (261), 132 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:27,929 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 262 transitions. [2022-11-20 11:01:27,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-11-20 11:01:27,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:01:27,930 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 63, 63, 1, 1, 1, 1, 1, 1] [2022-11-20 11:01:27,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-11-20 11:01:28,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:01:28,134 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:01:28,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:01:28,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1173872760, now seen corresponding path program 126 times [2022-11-20 11:01:28,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:01:28,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345613716] [2022-11-20 11:01:28,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:28,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:01:28,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:32,333 INFO L134 CoverageAnalysis]: Checked inductivity of 8065 backedges. 2016 proven. 6049 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:01:32,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:01:32,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345613716] [2022-11-20 11:01:32,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345613716] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:01:32,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639086120] [2022-11-20 11:01:32,334 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:01:32,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:01:32,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:01:32,339 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:01:32,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-11-20 11:01:32,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 64 check-sat command(s) [2022-11-20 11:01:32,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:01:32,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 988 conjuncts, 134 conjunts are in the unsatisfiable core [2022-11-20 11:01:32,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:01:33,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8065 backedges. 2080 proven. 5985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:01:33,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:01:36,686 INFO L134 CoverageAnalysis]: Checked inductivity of 8065 backedges. 2080 proven. 5985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:01:36,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639086120] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:01:36,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:01:36,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 70 [2022-11-20 11:01:36,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540262224] [2022-11-20 11:01:36,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:01:36,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-20 11:01:36,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:01:36,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-20 11:01:36,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2219, Invalid=2611, Unknown=0, NotChecked=0, Total=4830 [2022-11-20 11:01:36,689 INFO L87 Difference]: Start difference. First operand 261 states and 262 transitions. Second operand has 70 states, 70 states have (on average 3.7714285714285714) internal successors, (264), 70 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:38,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:01:38,586 INFO L93 Difference]: Finished difference Result 272 states and 273 transitions. [2022-11-20 11:01:38,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-11-20 11:01:38,587 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.7714285714285714) internal successors, (264), 70 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 260 [2022-11-20 11:01:38,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:01:38,588 INFO L225 Difference]: With dead ends: 272 [2022-11-20 11:01:38,588 INFO L226 Difference]: Without dead ends: 270 [2022-11-20 11:01:38,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 715 GetRequests, 453 SyntacticMatches, 128 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8890 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=6773, Invalid=11587, Unknown=0, NotChecked=0, Total=18360 [2022-11-20 11:01:38,589 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 286 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:01:38,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 29 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:01:38,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-11-20 11:01:38,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 264. [2022-11-20 11:01:38,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.0076045627376427) internal successors, (265), 263 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:38,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 265 transitions. [2022-11-20 11:01:38,680 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 265 transitions. Word has length 260 [2022-11-20 11:01:38,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:01:38,681 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 265 transitions. [2022-11-20 11:01:38,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.7714285714285714) internal successors, (264), 70 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:38,681 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 265 transitions. [2022-11-20 11:01:38,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-11-20 11:01:38,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:01:38,682 INFO L195 NwaCegarLoop]: trace histogram [65, 64, 64, 64, 1, 1, 1, 1, 1, 1] [2022-11-20 11:01:38,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-11-20 11:01:38,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:01:38,884 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:01:38,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:01:38,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1214848847, now seen corresponding path program 127 times [2022-11-20 11:01:38,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:01:38,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781237711] [2022-11-20 11:01:38,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:38,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:01:38,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:46,198 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 6176 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:01:46,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:01:46,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781237711] [2022-11-20 11:01:46,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781237711] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:01:46,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896230320] [2022-11-20 11:01:46,199 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:01:46,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:01:46,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:01:46,200 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:01:46,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-11-20 11:01:46,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:46,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 132 conjunts are in the unsatisfiable core [2022-11-20 11:01:46,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:01:46,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 6176 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:01:46,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:01:52,221 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 6176 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:01:52,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896230320] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:01:52,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:01:52,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133, 133] total 134 [2022-11-20 11:01:52,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974874056] [2022-11-20 11:01:52,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:01:52,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-11-20 11:01:52,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:01:52,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-11-20 11:01:52,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4490, Invalid=13332, Unknown=0, NotChecked=0, Total=17822 [2022-11-20 11:01:52,225 INFO L87 Difference]: Start difference. First operand 264 states and 265 transitions. Second operand has 134 states, 134 states have (on average 1.9776119402985075) internal successors, (265), 134 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:56,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:01:56,447 INFO L93 Difference]: Finished difference Result 464 states and 466 transitions. [2022-11-20 11:01:56,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-11-20 11:01:56,447 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.9776119402985075) internal successors, (265), 134 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 263 [2022-11-20 11:01:56,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:01:56,448 INFO L225 Difference]: With dead ends: 464 [2022-11-20 11:01:56,448 INFO L226 Difference]: Without dead ends: 265 [2022-11-20 11:01:56,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 723 GetRequests, 394 SyntacticMatches, 131 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15329 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=9044, Invalid=30756, Unknown=0, NotChecked=0, Total=39800 [2022-11-20 11:01:56,451 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 9 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:01:56,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 561 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1150 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 11:01:56,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-11-20 11:01:56,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2022-11-20 11:01:56,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.0075757575757576) internal successors, (266), 264 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:56,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 266 transitions. [2022-11-20 11:01:56,559 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 266 transitions. Word has length 263 [2022-11-20 11:01:56,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:01:56,560 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 266 transitions. [2022-11-20 11:01:56,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.9776119402985075) internal successors, (265), 134 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:56,560 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 266 transitions. [2022-11-20 11:01:56,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-11-20 11:01:56,561 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:01:56,561 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 64, 64, 1, 1, 1, 1, 1, 1] [2022-11-20 11:01:56,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-11-20 11:01:56,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-11-20 11:01:56,763 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:01:56,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:01:56,763 INFO L85 PathProgramCache]: Analyzing trace with hash -614148372, now seen corresponding path program 128 times [2022-11-20 11:01:56,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:01:56,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216180893] [2022-11-20 11:01:56,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:56,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:01:56,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:02:01,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8321 backedges. 2080 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:02:01,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:02:01,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216180893] [2022-11-20 11:02:01,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216180893] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:02:01,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008096387] [2022-11-20 11:02:01,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:02:01,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:02:01,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:02:01,256 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:02:01,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-11-20 11:02:01,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:02:01,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:02:01,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 1003 conjuncts, 136 conjunts are in the unsatisfiable core [2022-11-20 11:02:01,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:02:01,814 INFO L134 CoverageAnalysis]: Checked inductivity of 8321 backedges. 2145 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:02:01,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:02:05,577 INFO L134 CoverageAnalysis]: Checked inductivity of 8321 backedges. 2145 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:02:05,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008096387] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:02:05,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:02:05,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 71 [2022-11-20 11:02:05,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795714662] [2022-11-20 11:02:05,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:02:05,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-20 11:02:05,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:02:05,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-20 11:02:05,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2286, Invalid=2684, Unknown=0, NotChecked=0, Total=4970 [2022-11-20 11:02:05,579 INFO L87 Difference]: Start difference. First operand 265 states and 266 transitions. Second operand has 71 states, 71 states have (on average 3.7746478873239435) internal successors, (268), 71 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:07,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:02:07,557 INFO L93 Difference]: Finished difference Result 276 states and 277 transitions. [2022-11-20 11:02:07,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-11-20 11:02:07,559 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.7746478873239435) internal successors, (268), 71 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 264 [2022-11-20 11:02:07,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:02:07,560 INFO L225 Difference]: With dead ends: 276 [2022-11-20 11:02:07,560 INFO L226 Difference]: Without dead ends: 274 [2022-11-20 11:02:07,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 726 GetRequests, 460 SyntacticMatches, 130 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9159 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=6976, Invalid=11930, Unknown=0, NotChecked=0, Total=18906 [2022-11-20 11:02:07,563 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 534 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:02:07,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [534 Valid, 35 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:02:07,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-11-20 11:02:07,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 268. [2022-11-20 11:02:07,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.0074906367041199) internal successors, (269), 267 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:07,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 269 transitions. [2022-11-20 11:02:07,669 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 269 transitions. Word has length 264 [2022-11-20 11:02:07,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:02:07,669 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 269 transitions. [2022-11-20 11:02:07,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.7746478873239435) internal successors, (268), 71 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:07,670 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 269 transitions. [2022-11-20 11:02:07,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-11-20 11:02:07,670 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:02:07,671 INFO L195 NwaCegarLoop]: trace histogram [66, 65, 65, 65, 1, 1, 1, 1, 1, 1] [2022-11-20 11:02:07,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-11-20 11:02:07,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:02:07,871 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:02:07,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:02:07,871 INFO L85 PathProgramCache]: Analyzing trace with hash 471350989, now seen corresponding path program 129 times [2022-11-20 11:02:07,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:02:07,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996503071] [2022-11-20 11:02:07,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:02:07,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:02:08,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:02:15,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 6370 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:02:15,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:02:15,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996503071] [2022-11-20 11:02:15,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996503071] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:02:15,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37824313] [2022-11-20 11:02:15,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:02:15,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:02:15,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:02:15,627 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:02:15,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-11-20 11:02:16,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 66 check-sat command(s) [2022-11-20 11:02:16,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:02:16,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 1013 conjuncts, 134 conjunts are in the unsatisfiable core [2022-11-20 11:02:16,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:02:16,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 6370 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:02:16,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:02:22,053 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 6370 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:02:22,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37824313] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:02:22,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:02:22,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [135, 135, 135] total 136 [2022-11-20 11:02:22,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144201662] [2022-11-20 11:02:22,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:02:22,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-11-20 11:02:22,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:02:22,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-11-20 11:02:22,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4625, Invalid=13735, Unknown=0, NotChecked=0, Total=18360 [2022-11-20 11:02:22,057 INFO L87 Difference]: Start difference. First operand 268 states and 269 transitions. Second operand has 136 states, 136 states have (on average 1.9779411764705883) internal successors, (269), 136 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:26,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:02:26,399 INFO L93 Difference]: Finished difference Result 471 states and 473 transitions. [2022-11-20 11:02:26,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-11-20 11:02:26,399 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 1.9779411764705883) internal successors, (269), 136 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 267 [2022-11-20 11:02:26,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:02:26,399 INFO L225 Difference]: With dead ends: 471 [2022-11-20 11:02:26,399 INFO L226 Difference]: Without dead ends: 269 [2022-11-20 11:02:26,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 734 GetRequests, 400 SyntacticMatches, 133 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15796 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=9315, Invalid=31691, Unknown=0, NotChecked=0, Total=41006 [2022-11-20 11:02:26,402 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 9 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 1252 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:02:26,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 616 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1252 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 11:02:26,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-11-20 11:02:26,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2022-11-20 11:02:26,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.007462686567164) internal successors, (270), 268 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:26,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 270 transitions. [2022-11-20 11:02:26,497 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 270 transitions. Word has length 267 [2022-11-20 11:02:26,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:02:26,497 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 270 transitions. [2022-11-20 11:02:26,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 1.9779411764705883) internal successors, (269), 136 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:26,497 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 270 transitions. [2022-11-20 11:02:26,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-11-20 11:02:26,498 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:02:26,498 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 65, 65, 1, 1, 1, 1, 1, 1] [2022-11-20 11:02:26,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-11-20 11:02:26,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:02:26,699 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:02:26,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:02:26,699 INFO L85 PathProgramCache]: Analyzing trace with hash 523935624, now seen corresponding path program 130 times [2022-11-20 11:02:26,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:02:26,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117514573] [2022-11-20 11:02:26,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:02:26,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:02:26,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:02:30,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8581 backedges. 2145 proven. 6436 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:02:30,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:02:30,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117514573] [2022-11-20 11:02:30,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117514573] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:02:30,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121110522] [2022-11-20 11:02:30,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:02:30,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:02:30,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:02:30,955 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:02:30,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-11-20 11:02:31,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:02:31,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:02:31,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 1018 conjuncts, 138 conjunts are in the unsatisfiable core [2022-11-20 11:02:31,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:02:31,552 INFO L134 CoverageAnalysis]: Checked inductivity of 8581 backedges. 2211 proven. 6370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:02:31,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:02:35,401 INFO L134 CoverageAnalysis]: Checked inductivity of 8581 backedges. 2211 proven. 6370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:02:35,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121110522] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:02:35,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:02:35,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 72 [2022-11-20 11:02:35,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949426582] [2022-11-20 11:02:35,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:02:35,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-20 11:02:35,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:02:35,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-20 11:02:35,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2354, Invalid=2758, Unknown=0, NotChecked=0, Total=5112 [2022-11-20 11:02:35,403 INFO L87 Difference]: Start difference. First operand 269 states and 270 transitions. Second operand has 72 states, 72 states have (on average 3.7777777777777777) internal successors, (272), 72 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:37,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:02:37,469 INFO L93 Difference]: Finished difference Result 280 states and 281 transitions. [2022-11-20 11:02:37,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-11-20 11:02:37,469 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.7777777777777777) internal successors, (272), 72 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 268 [2022-11-20 11:02:37,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:02:37,470 INFO L225 Difference]: With dead ends: 280 [2022-11-20 11:02:37,470 INFO L226 Difference]: Without dead ends: 278 [2022-11-20 11:02:37,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 737 GetRequests, 467 SyntacticMatches, 132 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9432 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=7182, Invalid=12278, Unknown=0, NotChecked=0, Total=19460 [2022-11-20 11:02:37,472 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 412 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:02:37,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 37 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:02:37,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-11-20 11:02:37,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 272. [2022-11-20 11:02:37,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 1.007380073800738) internal successors, (273), 271 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:37,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 273 transitions. [2022-11-20 11:02:37,570 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 273 transitions. Word has length 268 [2022-11-20 11:02:37,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:02:37,570 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 273 transitions. [2022-11-20 11:02:37,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.7777777777777777) internal successors, (272), 72 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:37,571 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 273 transitions. [2022-11-20 11:02:37,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-11-20 11:02:37,571 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:02:37,572 INFO L195 NwaCegarLoop]: trace histogram [67, 66, 66, 66, 1, 1, 1, 1, 1, 1] [2022-11-20 11:02:37,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-11-20 11:02:37,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b850c841-60f5-4910-9ffc-b7cfc09aea5f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:02:37,772 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:02:37,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:02:37,772 INFO L85 PathProgramCache]: Analyzing trace with hash 659841201, now seen corresponding path program 131 times [2022-11-20 11:02:37,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:02:37,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238545025] [2022-11-20 11:02:37,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:02:37,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:02:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat