./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/sep20-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/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_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/sep20-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/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_2810fef1-2ded-40e8-b95a-07483e8dc3d7/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 0b75ecb951567bcc8ce71aeb3e25d04f795cdcdda48b1113da4558d335596a9c --- 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 12:44:22,247 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 12:44:22,250 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 12:44:22,298 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 12:44:22,299 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 12:44:22,304 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 12:44:22,307 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 12:44:22,311 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 12:44:22,314 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 12:44:22,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 12:44:22,320 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 12:44:22,324 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 12:44:22,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 12:44:22,331 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 12:44:22,332 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 12:44:22,334 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 12:44:22,339 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 12:44:22,341 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 12:44:22,343 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 12:44:22,347 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 12:44:22,351 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 12:44:22,354 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 12:44:22,356 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 12:44:22,357 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 12:44:22,367 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 12:44:22,370 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 12:44:22,371 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 12:44:22,372 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 12:44:22,374 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 12:44:22,377 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 12:44:22,377 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 12:44:22,378 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 12:44:22,380 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 12:44:22,382 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 12:44:22,385 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 12:44:22,385 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 12:44:22,386 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 12:44:22,386 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 12:44:22,387 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 12:44:22,389 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 12:44:22,390 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 12:44:22,391 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 12:44:22,431 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 12:44:22,431 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 12:44:22,432 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 12:44:22,432 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 12:44:22,433 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 12:44:22,434 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 12:44:22,434 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 12:44:22,435 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 12:44:22,435 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 12:44:22,435 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 12:44:22,437 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 12:44:22,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 12:44:22,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 12:44:22,438 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 12:44:22,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 12:44:22,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 12:44:22,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 12:44:22,438 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 12:44:22,439 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 12:44:22,439 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 12:44:22,439 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 12:44:22,440 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 12:44:22,440 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 12:44:22,440 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 12:44:22,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:44:22,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 12:44:22,441 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 12:44:22,441 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 12:44:22,442 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 12:44:22,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 12:44:22,442 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 12:44:22,443 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 12:44:22,443 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 12:44:22,443 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_2810fef1-2ded-40e8-b95a-07483e8dc3d7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b75ecb951567bcc8ce71aeb3e25d04f795cdcdda48b1113da4558d335596a9c [2022-11-20 12:44:22,815 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 12:44:22,841 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 12:44:22,845 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 12:44:22,846 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 12:44:22,847 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 12:44:22,848 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/reducercommutativity/sep20-1.i [2022-11-20 12:44:26,069 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 12:44:26,382 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 12:44:26,383 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/sv-benchmarks/c/reducercommutativity/sep20-1.i [2022-11-20 12:44:26,391 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/data/140193d16/3f72b522cc834ec19c719d5980109c0b/FLAG8e7c757e1 [2022-11-20 12:44:26,408 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/data/140193d16/3f72b522cc834ec19c719d5980109c0b [2022-11-20 12:44:26,411 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 12:44:26,413 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 12:44:26,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 12:44:26,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 12:44:26,423 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 12:44:26,424 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:44:26" (1/1) ... [2022-11-20 12:44:26,425 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@797f7c55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:44:26, skipping insertion in model container [2022-11-20 12:44:26,426 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:44:26" (1/1) ... [2022-11-20 12:44:26,435 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 12:44:26,464 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 12:44:26,662 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_2810fef1-2ded-40e8-b95a-07483e8dc3d7/sv-benchmarks/c/reducercommutativity/sep20-1.i[1293,1306] [2022-11-20 12:44:26,668 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:44:26,679 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 12:44:26,704 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_2810fef1-2ded-40e8-b95a-07483e8dc3d7/sv-benchmarks/c/reducercommutativity/sep20-1.i[1293,1306] [2022-11-20 12:44:26,705 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:44:26,722 INFO L208 MainTranslator]: Completed translation [2022-11-20 12:44:26,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:44:26 WrapperNode [2022-11-20 12:44:26,723 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 12:44:26,724 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 12:44:26,724 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 12:44:26,725 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 12:44:26,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:44:26" (1/1) ... [2022-11-20 12:44:26,756 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:44:26" (1/1) ... [2022-11-20 12:44:26,789 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-11-20 12:44:26,790 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 12:44:26,791 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 12:44:26,791 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 12:44:26,791 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 12:44:26,805 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:44:26" (1/1) ... [2022-11-20 12:44:26,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:44:26" (1/1) ... [2022-11-20 12:44:26,811 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:44:26" (1/1) ... [2022-11-20 12:44:26,813 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:44:26" (1/1) ... [2022-11-20 12:44:26,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:44:26" (1/1) ... [2022-11-20 12:44:26,827 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:44:26" (1/1) ... [2022-11-20 12:44:26,828 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:44:26" (1/1) ... [2022-11-20 12:44:26,830 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:44:26" (1/1) ... [2022-11-20 12:44:26,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 12:44:26,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 12:44:26,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 12:44:26,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 12:44:26,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:44:26" (1/1) ... [2022-11-20 12:44:26,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:44:26,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:44:26,874 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 12:44:26,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 12:44:26,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 12:44:26,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 12:44:26,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 12:44:26,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 12:44:26,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 12:44:26,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 12:44:26,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 12:44:26,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 12:44:26,932 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2022-11-20 12:44:26,932 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2022-11-20 12:44:27,019 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 12:44:27,022 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 12:44:27,406 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 12:44:27,414 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 12:44:27,414 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 12:44:27,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:44:27 BoogieIcfgContainer [2022-11-20 12:44:27,419 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 12:44:27,422 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 12:44:27,422 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 12:44:27,426 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 12:44:27,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:44:26" (1/3) ... [2022-11-20 12:44:27,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19a727dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:44:27, skipping insertion in model container [2022-11-20 12:44:27,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:44:26" (2/3) ... [2022-11-20 12:44:27,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19a727dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:44:27, skipping insertion in model container [2022-11-20 12:44:27,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:44:27" (3/3) ... [2022-11-20 12:44:27,430 INFO L112 eAbstractionObserver]: Analyzing ICFG sep20-1.i [2022-11-20 12:44:27,455 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 12:44:27,455 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 12:44:27,522 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:44:27,531 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;@5d516df, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:44:27,531 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 12:44:27,536 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 12:44:27,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 12:44:27,548 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:44:27,548 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:44:27,549 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:44:27,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:44:27,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1312709850, now seen corresponding path program 1 times [2022-11-20 12:44:27,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:44:27,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886873930] [2022-11-20 12:44:27,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:44:27,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:44:27,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:27,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 12:44:28,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:28,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 12:44:28,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:28,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 12:44:28,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:28,049 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 12:44:28,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:44:28,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886873930] [2022-11-20 12:44:28,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886873930] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:44:28,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:44:28,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:44:28,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509415925] [2022-11-20 12:44:28,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:44:28,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:44:28,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:44:28,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:44:28,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:44:28,127 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 12:44:28,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:44:28,197 INFO L93 Difference]: Finished difference Result 52 states and 73 transitions. [2022-11-20 12:44:28,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:44:28,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-11-20 12:44:28,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:44:28,210 INFO L225 Difference]: With dead ends: 52 [2022-11-20 12:44:28,210 INFO L226 Difference]: Without dead ends: 25 [2022-11-20 12:44:28,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:44:28,218 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:44:28,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:44:28,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-20 12:44:28,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-11-20 12:44:28,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 12:44:28,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-11-20 12:44:28,263 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 28 [2022-11-20 12:44:28,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:44:28,264 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-11-20 12:44:28,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 12:44:28,264 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-11-20 12:44:28,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 12:44:28,267 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:44:28,267 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:44:28,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 12:44:28,268 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:44:28,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:44:28,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1845794557, now seen corresponding path program 1 times [2022-11-20 12:44:28,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:44:28,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424606422] [2022-11-20 12:44:28,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:44:28,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:44:28,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:28,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-20 12:44:28,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:28,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 12:44:28,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:28,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-20 12:44:28,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:28,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 12:44:28,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:44:28,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424606422] [2022-11-20 12:44:28,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424606422] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:44:28,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524820132] [2022-11-20 12:44:28,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:44:28,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:44:28,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:44:28,614 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:44:28,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 12:44:28,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:28,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 12:44:28,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:44:28,866 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 12:44:28,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:44:28,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524820132] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:44:28,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:44:28,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-20 12:44:28,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036061648] [2022-11-20 12:44:28,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:44:28,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:44:28,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:44:28,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:44:28,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:44:28,877 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 12:44:28,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:44:28,915 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2022-11-20 12:44:28,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:44:28,917 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-11-20 12:44:28,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:44:28,918 INFO L225 Difference]: With dead ends: 45 [2022-11-20 12:44:28,919 INFO L226 Difference]: Without dead ends: 27 [2022-11-20 12:44:28,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:44:28,922 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:44:28,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 50 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:44:28,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-20 12:44:28,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-11-20 12:44:28,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 12:44:28,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-11-20 12:44:28,951 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2022-11-20 12:44:28,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:44:28,952 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-11-20 12:44:28,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 12:44:28,952 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-11-20 12:44:28,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 12:44:28,953 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:44:28,954 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:44:28,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 12:44:29,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-20 12:44:29,163 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:44:29,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:44:29,163 INFO L85 PathProgramCache]: Analyzing trace with hash -701057785, now seen corresponding path program 1 times [2022-11-20 12:44:29,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:44:29,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273353471] [2022-11-20 12:44:29,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:44:29,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:44:29,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:29,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-20 12:44:29,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:29,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 12:44:29,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:29,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 12:44:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:29,426 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 12:44:29,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:44:29,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273353471] [2022-11-20 12:44:29,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273353471] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:44:29,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568519256] [2022-11-20 12:44:29,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:44:29,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:44:29,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:44:29,430 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:44:29,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 12:44:29,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:29,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 12:44:29,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:44:29,613 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 12:44:29,619 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:44:29,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568519256] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:44:29,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:44:29,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-20 12:44:29,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178455055] [2022-11-20 12:44:29,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:44:29,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:44:29,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:44:29,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:44:29,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:44:29,625 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 12:44:29,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:44:29,648 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-11-20 12:44:29,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:44:29,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-11-20 12:44:29,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:44:29,660 INFO L225 Difference]: With dead ends: 41 [2022-11-20 12:44:29,662 INFO L226 Difference]: Without dead ends: 27 [2022-11-20 12:44:29,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:44:29,665 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:44:29,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:44:29,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-20 12:44:29,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-11-20 12:44:29,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 12:44:29,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-11-20 12:44:29,678 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 39 [2022-11-20 12:44:29,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:44:29,681 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-11-20 12:44:29,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 12:44:29,681 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-11-20 12:44:29,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-20 12:44:29,685 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:44:29,686 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:44:29,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 12:44:29,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:44:29,894 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:44:29,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:44:29,895 INFO L85 PathProgramCache]: Analyzing trace with hash -235909079, now seen corresponding path program 1 times [2022-11-20 12:44:29,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:44:29,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267691117] [2022-11-20 12:44:29,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:44:29,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:44:29,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:30,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-20 12:44:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:30,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 12:44:30,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:30,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-20 12:44:30,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:30,077 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 12:44:30,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:44:30,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267691117] [2022-11-20 12:44:30,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267691117] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:44:30,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544523876] [2022-11-20 12:44:30,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:44:30,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:44:30,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:44:30,081 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:44:30,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 12:44:30,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:30,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 12:44:30,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:44:30,245 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-20 12:44:30,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:44:30,296 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-20 12:44:30,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544523876] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:44:30,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:44:30,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-11-20 12:44:30,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320005769] [2022-11-20 12:44:30,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:44:30,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 12:44:30,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:44:30,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 12:44:30,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:44:30,300 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-20 12:44:30,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:44:30,392 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2022-11-20 12:44:30,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 12:44:30,398 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2022-11-20 12:44:30,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:44:30,399 INFO L225 Difference]: With dead ends: 58 [2022-11-20 12:44:30,401 INFO L226 Difference]: Without dead ends: 37 [2022-11-20 12:44:30,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:44:30,404 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 12 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:44:30,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 156 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:44:30,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-20 12:44:30,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2022-11-20 12:44:30,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 12:44:30,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-11-20 12:44:30,416 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 41 [2022-11-20 12:44:30,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:44:30,417 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-11-20 12:44:30,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-20 12:44:30,418 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-11-20 12:44:30,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-20 12:44:30,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:44:30,419 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:44:30,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 12:44:30,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:44:30,627 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:44:30,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:44:30,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1946429025, now seen corresponding path program 2 times [2022-11-20 12:44:30,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:44:30,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634261247] [2022-11-20 12:44:30,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:44:30,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:44:30,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:30,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-20 12:44:30,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:30,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-20 12:44:30,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:30,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 12:44:30,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:30,928 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-11-20 12:44:30,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:44:30,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634261247] [2022-11-20 12:44:30,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634261247] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:44:30,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025842174] [2022-11-20 12:44:30,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:44:30,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:44:30,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:44:30,932 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:44:30,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 12:44:31,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:44:31,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:44:31,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 12:44:31,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:44:31,168 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-20 12:44:31,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:44:31,299 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-20 12:44:31,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025842174] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:44:31,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:44:31,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-11-20 12:44:31,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082355167] [2022-11-20 12:44:31,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:44:31,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 12:44:31,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:44:31,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 12:44:31,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-20 12:44:31,307 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-20 12:44:31,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:44:31,402 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2022-11-20 12:44:31,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 12:44:31,403 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 56 [2022-11-20 12:44:31,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:44:31,406 INFO L225 Difference]: With dead ends: 74 [2022-11-20 12:44:31,407 INFO L226 Difference]: Without dead ends: 50 [2022-11-20 12:44:31,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-20 12:44:31,409 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:44:31,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 111 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:44:31,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-20 12:44:31,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-11-20 12:44:31,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 12:44:31,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-11-20 12:44:31,437 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 56 [2022-11-20 12:44:31,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:44:31,438 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-11-20 12:44:31,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-20 12:44:31,438 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-11-20 12:44:31,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-20 12:44:31,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:44:31,447 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:44:31,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 12:44:31,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:44:31,654 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:44:31,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:44:31,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1341839115, now seen corresponding path program 3 times [2022-11-20 12:44:31,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:44:31,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828026309] [2022-11-20 12:44:31,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:44:31,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:44:31,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:32,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 12:44:32,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:32,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-20 12:44:32,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:32,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-20 12:44:32,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:32,247 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-20 12:44:32,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:44:32,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828026309] [2022-11-20 12:44:32,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828026309] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:44:32,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293203857] [2022-11-20 12:44:32,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:44:32,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:44:32,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:44:32,250 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:44:32,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 12:44:32,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 12:44:32,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:44:32,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 12:44:32,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:44:32,453 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-11-20 12:44:32,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:44:32,550 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-11-20 12:44:32,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293203857] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:44:32,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:44:32,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2022-11-20 12:44:32,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589550328] [2022-11-20 12:44:32,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:44:32,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 12:44:32,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:44:32,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 12:44:32,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-11-20 12:44:32,561 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-20 12:44:32,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:44:32,688 INFO L93 Difference]: Finished difference Result 90 states and 113 transitions. [2022-11-20 12:44:32,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 12:44:32,689 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 70 [2022-11-20 12:44:32,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:44:32,693 INFO L225 Difference]: With dead ends: 90 [2022-11-20 12:44:32,693 INFO L226 Difference]: Without dead ends: 64 [2022-11-20 12:44:32,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-11-20 12:44:32,695 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 42 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:44:32,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 118 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:44:32,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-20 12:44:32,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-11-20 12:44:32,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 12:44:32,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2022-11-20 12:44:32,704 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 70 [2022-11-20 12:44:32,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:44:32,705 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2022-11-20 12:44:32,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-20 12:44:32,705 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2022-11-20 12:44:32,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-20 12:44:32,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:44:32,707 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:44:32,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 12:44:32,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 12:44:32,914 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:44:32,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:44:32,915 INFO L85 PathProgramCache]: Analyzing trace with hash 2138241293, now seen corresponding path program 4 times [2022-11-20 12:44:32,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:44:32,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586718965] [2022-11-20 12:44:32,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:44:32,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:44:32,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:33,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-20 12:44:33,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:33,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-20 12:44:33,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:33,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-20 12:44:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:33,540 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2022-11-20 12:44:33,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:44:33,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586718965] [2022-11-20 12:44:33,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586718965] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:44:33,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680598008] [2022-11-20 12:44:33,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:44:33,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:44:33,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:44:33,543 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:44:33,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 12:44:33,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:44:33,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:44:33,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 12:44:33,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:44:33,836 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2022-11-20 12:44:33,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:44:34,202 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2022-11-20 12:44:34,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680598008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:44:34,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:44:34,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 23 [2022-11-20 12:44:34,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600032570] [2022-11-20 12:44:34,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:44:34,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 12:44:34,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:44:34,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 12:44:34,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-11-20 12:44:34,206 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-20 12:44:34,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:44:34,320 INFO L93 Difference]: Finished difference Result 119 states and 147 transitions. [2022-11-20 12:44:34,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 12:44:34,321 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 108 [2022-11-20 12:44:34,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:44:34,323 INFO L225 Difference]: With dead ends: 119 [2022-11-20 12:44:34,324 INFO L226 Difference]: Without dead ends: 81 [2022-11-20 12:44:34,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 209 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-11-20 12:44:34,329 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 20 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:44:34,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 74 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:44:34,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-20 12:44:34,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-11-20 12:44:34,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.118421052631579) internal successors, (85), 76 states have internal predecessors, (85), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 12:44:34,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2022-11-20 12:44:34,352 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 108 [2022-11-20 12:44:34,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:44:34,354 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2022-11-20 12:44:34,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-20 12:44:34,355 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2022-11-20 12:44:34,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-20 12:44:34,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:44:34,366 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 18, 18, 18, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:44:34,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 12:44:34,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:44:34,568 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:44:34,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:44:34,568 INFO L85 PathProgramCache]: Analyzing trace with hash 2004558111, now seen corresponding path program 5 times [2022-11-20 12:44:34,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:44:34,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079870797] [2022-11-20 12:44:34,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:44:34,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:44:34,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:34,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-20 12:44:34,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:35,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-20 12:44:35,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:35,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-20 12:44:35,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:35,137 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 633 trivial. 0 not checked. [2022-11-20 12:44:35,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:44:35,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079870797] [2022-11-20 12:44:35,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079870797] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:44:35,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315306120] [2022-11-20 12:44:35,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 12:44:35,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:44:35,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:44:35,140 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:44:35,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 12:44:36,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-11-20 12:44:36,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:44:36,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 12:44:36,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:44:36,241 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 244 proven. 51 refuted. 0 times theorem prover too weak. 637 trivial. 0 not checked. [2022-11-20 12:44:36,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:44:36,409 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 633 trivial. 0 not checked. [2022-11-20 12:44:36,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315306120] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:44:36,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:44:36,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-11-20 12:44:36,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571120420] [2022-11-20 12:44:36,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:44:36,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 12:44:36,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:44:36,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 12:44:36,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2022-11-20 12:44:36,415 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 12:44:36,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:44:36,500 INFO L93 Difference]: Finished difference Result 142 states and 179 transitions. [2022-11-20 12:44:36,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 12:44:36,501 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 126 [2022-11-20 12:44:36,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:44:36,504 INFO L225 Difference]: With dead ends: 142 [2022-11-20 12:44:36,505 INFO L226 Difference]: Without dead ends: 105 [2022-11-20 12:44:36,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2022-11-20 12:44:36,509 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 58 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:44:36,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 96 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:44:36,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-20 12:44:36,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-11-20 12:44:36,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.17) internal successors, (117), 100 states have internal predecessors, (117), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 12:44:36,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2022-11-20 12:44:36,535 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 126 [2022-11-20 12:44:36,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:44:36,536 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2022-11-20 12:44:36,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 12:44:36,536 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2022-11-20 12:44:36,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-11-20 12:44:36,543 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:44:36,543 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 20, 20, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:44:36,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 12:44:36,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:44:36,744 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:44:36,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:44:36,744 INFO L85 PathProgramCache]: Analyzing trace with hash 848751647, now seen corresponding path program 6 times [2022-11-20 12:44:36,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:44:36,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780584288] [2022-11-20 12:44:36,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:44:36,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:44:36,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:37,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-20 12:44:37,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:38,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-11-20 12:44:38,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:38,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-11-20 12:44:38,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:38,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3128 backedges. 0 proven. 1527 refuted. 0 times theorem prover too weak. 1601 trivial. 0 not checked. [2022-11-20 12:44:38,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:44:38,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780584288] [2022-11-20 12:44:38,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780584288] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:44:38,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601818425] [2022-11-20 12:44:38,134 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 12:44:38,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:44:38,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:44:38,135 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:44:38,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 12:44:38,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-20 12:44:38,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:44:38,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 12:44:38,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:44:38,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3128 backedges. 1242 proven. 4 refuted. 0 times theorem prover too weak. 1882 trivial. 0 not checked. [2022-11-20 12:44:38,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:44:38,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3128 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3124 trivial. 0 not checked. [2022-11-20 12:44:38,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601818425] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:44:38,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:44:38,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 23 [2022-11-20 12:44:38,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836118428] [2022-11-20 12:44:38,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:44:38,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 12:44:38,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:44:38,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 12:44:38,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2022-11-20 12:44:38,551 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-20 12:44:38,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:44:38,681 INFO L93 Difference]: Finished difference Result 179 states and 223 transitions. [2022-11-20 12:44:38,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 12:44:38,682 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 198 [2022-11-20 12:44:38,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:44:38,683 INFO L225 Difference]: With dead ends: 179 [2022-11-20 12:44:38,684 INFO L226 Difference]: Without dead ends: 118 [2022-11-20 12:44:38,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2022-11-20 12:44:38,685 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 62 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:44:38,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 236 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:44:38,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-20 12:44:38,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2022-11-20 12:44:38,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.162162162162162) internal successors, (129), 111 states have internal predecessors, (129), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 12:44:38,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 135 transitions. [2022-11-20 12:44:38,697 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 135 transitions. Word has length 198 [2022-11-20 12:44:38,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:44:38,698 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 135 transitions. [2022-11-20 12:44:38,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-20 12:44:38,698 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 135 transitions. [2022-11-20 12:44:38,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-11-20 12:44:38,702 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:44:38,702 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:44:38,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 12:44:38,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-20 12:44:38,910 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:44:38,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:44:38,910 INFO L85 PathProgramCache]: Analyzing trace with hash -217509715, now seen corresponding path program 7 times [2022-11-20 12:44:38,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:44:38,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254031200] [2022-11-20 12:44:38,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:44:38,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:44:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:39,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-20 12:44:39,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:40,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-11-20 12:44:40,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:40,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2022-11-20 12:44:40,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:40,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3556 backedges. 0 proven. 1748 refuted. 0 times theorem prover too weak. 1808 trivial. 0 not checked. [2022-11-20 12:44:40,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:44:40,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254031200] [2022-11-20 12:44:40,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254031200] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:44:40,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801643919] [2022-11-20 12:44:40,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 12:44:40,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:44:40,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:44:40,439 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:44:40,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 12:44:40,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:40,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 12:44:40,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:44:40,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3556 backedges. 1414 proven. 330 refuted. 0 times theorem prover too weak. 1812 trivial. 0 not checked. [2022-11-20 12:44:40,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:44:41,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3556 backedges. 0 proven. 1748 refuted. 0 times theorem prover too weak. 1808 trivial. 0 not checked. [2022-11-20 12:44:41,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801643919] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:44:41,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:44:41,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 22 [2022-11-20 12:44:41,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373797759] [2022-11-20 12:44:41,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:44:41,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 12:44:41,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:44:41,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 12:44:41,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-11-20 12:44:41,284 INFO L87 Difference]: Start difference. First operand 116 states and 135 transitions. Second operand has 22 states, 22 states have (on average 4.045454545454546) internal successors, (89), 22 states have internal predecessors, (89), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 12:44:41,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:44:41,387 INFO L93 Difference]: Finished difference Result 203 states and 252 transitions. [2022-11-20 12:44:41,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 12:44:41,388 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.045454545454546) internal successors, (89), 22 states have internal predecessors, (89), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 215 [2022-11-20 12:44:41,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:44:41,392 INFO L225 Difference]: With dead ends: 203 [2022-11-20 12:44:41,392 INFO L226 Difference]: Without dead ends: 131 [2022-11-20 12:44:41,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 420 SyntacticMatches, 12 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-11-20 12:44:41,394 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 88 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:44:41,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 152 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:44:41,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-20 12:44:41,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-11-20 12:44:41,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.1825396825396826) internal successors, (149), 126 states have internal predecessors, (149), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 12:44:41,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 155 transitions. [2022-11-20 12:44:41,418 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 155 transitions. Word has length 215 [2022-11-20 12:44:41,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:44:41,420 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 155 transitions. [2022-11-20 12:44:41,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.045454545454546) internal successors, (89), 22 states have internal predecessors, (89), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 12:44:41,420 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 155 transitions. [2022-11-20 12:44:41,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-11-20 12:44:41,424 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:44:41,424 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:44:41,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 12:44:41,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:44:41,633 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:44:41,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:44:41,634 INFO L85 PathProgramCache]: Analyzing trace with hash -2054059049, now seen corresponding path program 8 times [2022-11-20 12:44:41,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:44:41,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295883572] [2022-11-20 12:44:41,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:44:41,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:44:41,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:42,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-20 12:44:42,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:42,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-20 12:44:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:42,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2022-11-20 12:44:42,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:42,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 5905 trivial. 0 not checked. [2022-11-20 12:44:42,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:44:42,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295883572] [2022-11-20 12:44:42,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295883572] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:44:42,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018891223] [2022-11-20 12:44:42,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:44:42,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:44:42,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:44:42,476 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:44:42,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 12:44:42,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:44:42,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:44:42,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 12:44:42,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:44:42,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 2490 proven. 36 refuted. 0 times theorem prover too weak. 3415 trivial. 0 not checked. [2022-11-20 12:44:42,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:44:42,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 5905 trivial. 0 not checked. [2022-11-20 12:44:42,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018891223] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:44:42,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:44:42,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-11-20 12:44:42,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134856219] [2022-11-20 12:44:42,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:44:42,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 12:44:42,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:44:42,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 12:44:42,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-11-20 12:44:42,966 INFO L87 Difference]: Start difference. First operand 131 states and 155 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 12:44:43,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:44:43,024 INFO L93 Difference]: Finished difference Result 218 states and 270 transitions. [2022-11-20 12:44:43,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 12:44:43,025 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 260 [2022-11-20 12:44:43,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:44:43,027 INFO L225 Difference]: With dead ends: 218 [2022-11-20 12:44:43,027 INFO L226 Difference]: Without dead ends: 147 [2022-11-20 12:44:43,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-11-20 12:44:43,029 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 14 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:44:43,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 95 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:44:43,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-20 12:44:43,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-11-20 12:44:43,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.1619718309859155) internal successors, (165), 142 states have internal predecessors, (165), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 12:44:43,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 171 transitions. [2022-11-20 12:44:43,039 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 171 transitions. Word has length 260 [2022-11-20 12:44:43,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:44:43,039 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 171 transitions. [2022-11-20 12:44:43,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 12:44:43,040 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 171 transitions. [2022-11-20 12:44:43,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2022-11-20 12:44:43,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:44:43,044 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 20, 20, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:44:43,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 12:44:43,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 12:44:43,250 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:44:43,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:44:43,251 INFO L85 PathProgramCache]: Analyzing trace with hash -371662137, now seen corresponding path program 9 times [2022-11-20 12:44:43,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:44:43,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317728091] [2022-11-20 12:44:43,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:44:43,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:44:43,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:44,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-20 12:44:44,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:44,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-20 12:44:44,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:44,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2022-11-20 12:44:44,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:44,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6101 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5905 trivial. 0 not checked. [2022-11-20 12:44:44,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:44:44,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317728091] [2022-11-20 12:44:44,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317728091] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:44:44,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075254509] [2022-11-20 12:44:44,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:44:44,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:44:44,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:44:44,489 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:44:44,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 12:44:51,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-11-20 12:44:51,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:44:51,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 12:44:51,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:44:51,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6101 backedges. 2490 proven. 196 refuted. 0 times theorem prover too weak. 3415 trivial. 0 not checked. [2022-11-20 12:44:51,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:44:52,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6101 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5905 trivial. 0 not checked. [2022-11-20 12:44:52,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075254509] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:44:52,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:44:52,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 22 [2022-11-20 12:44:52,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542691644] [2022-11-20 12:44:52,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:44:52,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 12:44:52,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:44:52,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 12:44:52,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-11-20 12:44:52,306 INFO L87 Difference]: Start difference. First operand 147 states and 171 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 12:44:52,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:44:52,393 INFO L93 Difference]: Finished difference Result 228 states and 277 transitions. [2022-11-20 12:44:52,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 12:44:52,394 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 276 [2022-11-20 12:44:52,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:44:52,395 INFO L225 Difference]: With dead ends: 228 [2022-11-20 12:44:52,396 INFO L226 Difference]: Without dead ends: 157 [2022-11-20 12:44:52,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 542 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-11-20 12:44:52,397 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 19 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:44:52,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 72 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:44:52,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-11-20 12:44:52,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2022-11-20 12:44:52,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.1513157894736843) internal successors, (175), 152 states have internal predecessors, (175), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 12:44:52,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 181 transitions. [2022-11-20 12:44:52,407 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 181 transitions. Word has length 276 [2022-11-20 12:44:52,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:44:52,408 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 181 transitions. [2022-11-20 12:44:52,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 12:44:52,409 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 181 transitions. [2022-11-20 12:44:52,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-11-20 12:44:52,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:44:52,413 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:44:52,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 12:44:52,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 12:44:52,638 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:44:52,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:44:52,638 INFO L85 PathProgramCache]: Analyzing trace with hash -2076360355, now seen corresponding path program 10 times [2022-11-20 12:44:52,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:44:52,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701747121] [2022-11-20 12:44:52,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:44:52,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:44:56,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:03,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-20 12:45:03,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:04,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-20 12:45:04,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:05,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-11-20 12:45:05,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 116 proven. 5524 refuted. 0 times theorem prover too weak. 626 trivial. 0 not checked. [2022-11-20 12:45:08,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:08,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701747121] [2022-11-20 12:45:08,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701747121] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:45:08,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662054707] [2022-11-20 12:45:08,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:45:08,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:45:08,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:45:08,999 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:45:09,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 12:45:09,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:45:09,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:45:09,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 145 conjunts are in the unsatisfiable core [2022-11-20 12:45:09,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:45:11,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 0 proven. 5310 refuted. 0 times theorem prover too weak. 956 trivial. 0 not checked. [2022-11-20 12:45:11,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:45:16,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 0 proven. 5310 refuted. 0 times theorem prover too weak. 956 trivial. 0 not checked. [2022-11-20 12:45:16,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662054707] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:45:16,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:45:16,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 30, 30] total 92 [2022-11-20 12:45:16,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906956388] [2022-11-20 12:45:16,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:45:16,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-11-20 12:45:16,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:16,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-11-20 12:45:16,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=8089, Unknown=0, NotChecked=0, Total=8372 [2022-11-20 12:45:16,367 INFO L87 Difference]: Start difference. First operand 157 states and 181 transitions. Second operand has 92 states, 90 states have (on average 2.5444444444444443) internal successors, (229), 86 states have internal predecessors, (229), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-20 12:45:25,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:45:25,770 INFO L93 Difference]: Finished difference Result 902 states and 1308 transitions. [2022-11-20 12:45:25,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-20 12:45:25,772 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 90 states have (on average 2.5444444444444443) internal successors, (229), 86 states have internal predecessors, (229), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 286 [2022-11-20 12:45:25,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:45:25,782 INFO L225 Difference]: With dead ends: 902 [2022-11-20 12:45:25,783 INFO L226 Difference]: Without dead ends: 898 [2022-11-20 12:45:25,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 664 GetRequests, 561 SyntacticMatches, 10 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2380 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=308, Invalid=8622, Unknown=0, NotChecked=0, Total=8930 [2022-11-20 12:45:25,789 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 233 mSDsluCounter, 5156 mSDsCounter, 0 mSdLazyCounter, 10328 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 5281 SdHoareTripleChecker+Invalid, 10478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 10328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:45:25,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 5281 Invalid, 10478 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [150 Valid, 10328 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2022-11-20 12:45:25,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2022-11-20 12:45:25,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 584. [2022-11-20 12:45:25,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 576 states have (on average 1.2864583333333333) internal successors, (741), 577 states have internal predecessors, (741), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-20 12:45:25,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 755 transitions. [2022-11-20 12:45:25,953 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 755 transitions. Word has length 286 [2022-11-20 12:45:25,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:45:25,954 INFO L495 AbstractCegarLoop]: Abstraction has 584 states and 755 transitions. [2022-11-20 12:45:25,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 90 states have (on average 2.5444444444444443) internal successors, (229), 86 states have internal predecessors, (229), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-20 12:45:25,955 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 755 transitions. [2022-11-20 12:45:25,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-11-20 12:45:25,966 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:45:25,967 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 59, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:45:25,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 12:45:26,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 12:45:26,178 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:45:26,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:26,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1396301985, now seen corresponding path program 1 times [2022-11-20 12:45:26,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:26,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419291155] [2022-11-20 12:45:26,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:26,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:29,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:36,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-20 12:45:36,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:37,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-20 12:45:37,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:37,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-11-20 12:45:37,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:39,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 1244 proven. 3639 refuted. 0 times theorem prover too weak. 1383 trivial. 0 not checked. [2022-11-20 12:45:39,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:39,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419291155] [2022-11-20 12:45:39,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419291155] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:45:39,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136052555] [2022-11-20 12:45:39,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:39,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:45:39,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:45:39,331 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:45:39,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 12:45:39,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:39,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 165 conjunts are in the unsatisfiable core [2022-11-20 12:45:39,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:45:42,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:45:42,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 24 [2022-11-20 12:45:43,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-20 12:45:43,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-20 12:45:48,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 7 proven. 5322 refuted. 0 times theorem prover too weak. 937 trivial. 0 not checked. [2022-11-20 12:45:48,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:45:53,890 INFO L321 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2022-11-20 12:45:53,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 30 [2022-11-20 12:45:54,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 1301 proven. 3116 refuted. 0 times theorem prover too weak. 1849 trivial. 0 not checked. [2022-11-20 12:45:54,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136052555] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:45:54,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:45:54,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 72, 32] total 124 [2022-11-20 12:45:54,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032836594] [2022-11-20 12:45:54,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:45:54,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-11-20 12:45:54,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:54,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-11-20 12:45:54,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=14788, Unknown=0, NotChecked=0, Total=15252 [2022-11-20 12:45:54,242 INFO L87 Difference]: Start difference. First operand 584 states and 755 transitions. Second operand has 124 states, 122 states have (on average 2.7704918032786887) internal successors, (338), 121 states have internal predecessors, (338), 6 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-20 12:46:11,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:46:11,256 INFO L93 Difference]: Finished difference Result 2561 states and 3482 transitions. [2022-11-20 12:46:11,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-11-20 12:46:11,257 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 122 states have (on average 2.7704918032786887) internal successors, (338), 121 states have internal predecessors, (338), 6 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) Word has length 286 [2022-11-20 12:46:11,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:46:11,273 INFO L225 Difference]: With dead ends: 2561 [2022-11-20 12:46:11,273 INFO L226 Difference]: Without dead ends: 2509 [2022-11-20 12:46:11,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 772 GetRequests, 565 SyntacticMatches, 9 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8789 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=1360, Invalid=38440, Unknown=0, NotChecked=0, Total=39800 [2022-11-20 12:46:11,286 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 582 mSDsluCounter, 7748 mSDsCounter, 0 mSdLazyCounter, 6013 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 7891 SdHoareTripleChecker+Invalid, 12262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 6013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6199 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:46:11,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 7891 Invalid, 12262 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [50 Valid, 6013 Invalid, 0 Unknown, 6199 Unchecked, 5.1s Time] [2022-11-20 12:46:11,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2022-11-20 12:46:11,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 2432. [2022-11-20 12:46:11,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2432 states, 2410 states have (on average 1.342323651452282) internal successors, (3235), 2419 states have internal predecessors, (3235), 9 states have call successors, (9), 3 states have call predecessors, (9), 12 states have return successors, (61), 9 states have call predecessors, (61), 9 states have call successors, (61) [2022-11-20 12:46:11,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2432 states to 2432 states and 3305 transitions. [2022-11-20 12:46:11,558 INFO L78 Accepts]: Start accepts. Automaton has 2432 states and 3305 transitions. Word has length 286 [2022-11-20 12:46:11,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:46:11,559 INFO L495 AbstractCegarLoop]: Abstraction has 2432 states and 3305 transitions. [2022-11-20 12:46:11,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 122 states have (on average 2.7704918032786887) internal successors, (338), 121 states have internal predecessors, (338), 6 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-20 12:46:11,559 INFO L276 IsEmpty]: Start isEmpty. Operand 2432 states and 3305 transitions. [2022-11-20 12:46:11,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-11-20 12:46:11,583 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:46:11,583 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 59, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:46:11,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 12:46:11,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 12:46:11,798 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:46:11,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:46:11,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1818194917, now seen corresponding path program 2 times [2022-11-20 12:46:11,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:46:11,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563390767] [2022-11-20 12:46:11,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:46:11,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:46:14,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:31,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-20 12:46:31,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:34,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-20 12:46:34,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:34,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-11-20 12:46:34,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:35,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 1246 proven. 4372 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2022-11-20 12:46:35,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:46:35,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563390767] [2022-11-20 12:46:35,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563390767] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:46:35,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525316683] [2022-11-20 12:46:35,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:46:35,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:46:35,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:46:35,391 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:46:35,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 12:46:35,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:46:35,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:46:35,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 277 conjunts are in the unsatisfiable core [2022-11-20 12:46:35,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:46:36,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 12:46:36,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:46:36,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-20 12:46:37,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:46:37,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-20 12:46:37,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:46:37,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-20 12:46:37,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:46:37,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-20 12:46:38,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:46:38,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-20 12:46:38,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:46:38,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-20 12:46:38,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:46:38,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-20 12:46:38,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:46:38,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-20 12:46:38,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:46:38,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-20 12:46:38,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:46:38,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-20 12:46:38,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:46:38,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-20 12:46:38,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:46:38,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-20 12:46:38,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:46:38,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-20 12:46:38,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:46:38,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-20 12:46:38,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:46:38,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-20 12:46:38,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:46:38,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-20 12:46:38,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:46:38,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-20 12:46:38,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:46:38,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-20 12:46:38,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:46:38,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-20 12:46:38,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:46:38,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:46:38,556 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-20 12:46:38,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-11-20 12:46:38,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:46:38,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:46:38,739 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:46:38,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 51 [2022-11-20 12:46:43,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 240 proven. 5965 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-20 12:46:43,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:47:17,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 2620 proven. 2651 refuted. 0 times theorem prover too weak. 995 trivial. 0 not checked. [2022-11-20 12:47:17,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525316683] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:47:17,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:47:17,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 89, 84] total 175 [2022-11-20 12:47:17,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372657280] [2022-11-20 12:47:17,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:47:17,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 175 states [2022-11-20 12:47:17,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:47:17,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 175 interpolants. [2022-11-20 12:47:17,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=29703, Unknown=0, NotChecked=0, Total=30450 [2022-11-20 12:47:17,275 INFO L87 Difference]: Start difference. First operand 2432 states and 3305 transitions. Second operand has 175 states, 175 states have (on average 2.3085714285714287) internal successors, (404), 173 states have internal predecessors, (404), 5 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-20 12:47:39,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:47:39,886 INFO L93 Difference]: Finished difference Result 8528 states and 11652 transitions. [2022-11-20 12:47:39,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-11-20 12:47:39,888 INFO L78 Accepts]: Start accepts. Automaton has has 175 states, 175 states have (on average 2.3085714285714287) internal successors, (404), 173 states have internal predecessors, (404), 5 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 286 [2022-11-20 12:47:39,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:47:39,924 INFO L225 Difference]: With dead ends: 8528 [2022-11-20 12:47:39,924 INFO L226 Difference]: Without dead ends: 6123 [2022-11-20 12:47:39,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 760 GetRequests, 534 SyntacticMatches, 10 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13456 ImplicationChecksByTransitivity, 48.8s TimeCoverageRelationStatistics Valid=2046, Invalid=45260, Unknown=0, NotChecked=0, Total=47306 [2022-11-20 12:47:39,943 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 455 mSDsluCounter, 12301 mSDsCounter, 0 mSdLazyCounter, 12594 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 12440 SdHoareTripleChecker+Invalid, 20817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 12594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8142 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:47:39,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 12440 Invalid, 20817 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [81 Valid, 12594 Invalid, 0 Unknown, 8142 Unchecked, 11.4s Time] [2022-11-20 12:47:39,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6123 states. [2022-11-20 12:47:40,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6123 to 5171. [2022-11-20 12:47:40,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5171 states, 5132 states have (on average 1.3265783320342945) internal successors, (6808), 5146 states have internal predecessors, (6808), 17 states have call successors, (17), 7 states have call predecessors, (17), 21 states have return successors, (120), 17 states have call predecessors, (120), 17 states have call successors, (120) [2022-11-20 12:47:40,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5171 states to 5171 states and 6945 transitions. [2022-11-20 12:47:40,718 INFO L78 Accepts]: Start accepts. Automaton has 5171 states and 6945 transitions. Word has length 286 [2022-11-20 12:47:40,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:47:40,719 INFO L495 AbstractCegarLoop]: Abstraction has 5171 states and 6945 transitions. [2022-11-20 12:47:40,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 175 states, 175 states have (on average 2.3085714285714287) internal successors, (404), 173 states have internal predecessors, (404), 5 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-20 12:47:40,720 INFO L276 IsEmpty]: Start isEmpty. Operand 5171 states and 6945 transitions. [2022-11-20 12:47:40,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-11-20 12:47:40,754 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:47:40,754 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 59, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:47:40,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 12:47:40,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:47:40,964 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:47:40,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:47:40,964 INFO L85 PathProgramCache]: Analyzing trace with hash 938743263, now seen corresponding path program 3 times [2022-11-20 12:47:40,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:47:40,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101378301] [2022-11-20 12:47:40,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:47:40,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:47:43,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:47:55,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-20 12:47:55,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:47:57,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-20 12:47:57,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:47:57,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-11-20 12:47:57,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:47:58,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 1246 proven. 4373 refuted. 0 times theorem prover too weak. 647 trivial. 0 not checked. [2022-11-20 12:47:58,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:47:58,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101378301] [2022-11-20 12:47:58,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101378301] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:47:58,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861551789] [2022-11-20 12:47:58,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:47:58,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:47:58,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:47:58,230 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:47:58,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 12:48:19,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2022-11-20 12:48:19,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:48:19,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 238 conjunts are in the unsatisfiable core [2022-11-20 12:48:19,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:48:19,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 12:48:19,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 12:48:20,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:48:20,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-20 12:48:21,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:48:21,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2022-11-20 12:48:21,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:48:21,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-20 12:48:21,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:48:21,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-20 12:48:22,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:48:22,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-20 12:48:22,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:48:22,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-20 12:48:22,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:48:22,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-20 12:48:22,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:48:22,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-20 12:48:22,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:48:22,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-20 12:48:22,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:48:22,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-20 12:48:22,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:48:22,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-20 12:48:22,286 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-20 12:48:22,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2022-11-20 12:48:22,643 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-20 12:48:22,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2022-11-20 12:48:22,859 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-20 12:48:22,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2022-11-20 12:48:22,921 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-20 12:48:22,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2022-11-20 12:48:23,117 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-20 12:48:23,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2022-11-20 12:48:23,292 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-20 12:48:23,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2022-11-20 12:48:23,462 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-20 12:48:23,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2022-11-20 12:48:23,646 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2022-11-20 12:48:23,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 54 [2022-11-20 12:48:24,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:48:24,102 INFO L321 Elim1Store]: treesize reduction 16, result has 61.9 percent of original size [2022-11-20 12:48:24,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 69 [2022-11-20 12:48:24,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 26 [2022-11-20 12:48:27,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 2268 proven. 2793 refuted. 0 times theorem prover too weak. 1205 trivial. 0 not checked. [2022-11-20 12:48:27,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:48:27,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861551789] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:48:27,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:48:27,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 58] total 105 [2022-11-20 12:48:27,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922638951] [2022-11-20 12:48:27,345 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:48:27,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-11-20 12:48:27,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:48:27,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-11-20 12:48:27,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=10640, Unknown=0, NotChecked=0, Total=11130 [2022-11-20 12:48:27,350 INFO L87 Difference]: Start difference. First operand 5171 states and 6945 transitions. Second operand has 105 states, 105 states have (on average 2.3333333333333335) internal successors, (245), 104 states have internal predecessors, (245), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-20 12:55:25,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:55:25,344 INFO L93 Difference]: Finished difference Result 41698 states and 56179 transitions. [2022-11-20 12:55:25,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 732 states. [2022-11-20 12:55:25,345 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.3333333333333335) internal successors, (245), 104 states have internal predecessors, (245), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 286 [2022-11-20 12:55:25,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:55:25,553 INFO L225 Difference]: With dead ends: 41698 [2022-11-20 12:55:25,554 INFO L226 Difference]: Without dead ends: 34249 [2022-11-20 12:55:25,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1210 GetRequests, 405 SyntacticMatches, 19 SemanticMatches, 786 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 264121 ImplicationChecksByTransitivity, 414.5s TimeCoverageRelationStatistics Valid=12971, Invalid=606879, Unknown=306, NotChecked=0, Total=620156 [2022-11-20 12:55:25,698 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 554 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 10012 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 21054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 10012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10868 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:55:25,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 535 Invalid, 21054 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [174 Valid, 10012 Invalid, 0 Unknown, 10868 Unchecked, 7.3s Time] [2022-11-20 12:55:25,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34249 states. [2022-11-20 12:55:29,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34249 to 15592. [2022-11-20 12:55:29,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15592 states, 15502 states have (on average 1.3653722100374146) internal successors, (21166), 15543 states have internal predecessors, (21166), 33 states have call successors, (33), 15 states have call predecessors, (33), 56 states have return successors, (520), 33 states have call predecessors, (520), 33 states have call successors, (520) [2022-11-20 12:55:29,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15592 states to 15592 states and 21719 transitions. [2022-11-20 12:55:29,375 INFO L78 Accepts]: Start accepts. Automaton has 15592 states and 21719 transitions. Word has length 286 [2022-11-20 12:55:29,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:55:29,376 INFO L495 AbstractCegarLoop]: Abstraction has 15592 states and 21719 transitions. [2022-11-20 12:55:29,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.3333333333333335) internal successors, (245), 104 states have internal predecessors, (245), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-20 12:55:29,377 INFO L276 IsEmpty]: Start isEmpty. Operand 15592 states and 21719 transitions. [2022-11-20 12:55:29,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-11-20 12:55:29,500 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:55:29,500 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 59, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:55:29,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-20 12:55:29,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 12:55:29,716 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:55:29,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:55:29,716 INFO L85 PathProgramCache]: Analyzing trace with hash 224462235, now seen corresponding path program 4 times [2022-11-20 12:55:29,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:55:29,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497950209] [2022-11-20 12:55:29,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:55:29,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:55:31,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:55:42,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-20 12:55:42,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:55:44,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-20 12:55:44,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:55:44,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-11-20 12:55:44,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:55:44,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 1246 proven. 4372 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2022-11-20 12:55:44,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:55:44,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497950209] [2022-11-20 12:55:44,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497950209] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:55:44,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778388736] [2022-11-20 12:55:44,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:55:44,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:55:44,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:55:44,894 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:55:44,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2810fef1-2ded-40e8-b95a-07483e8dc3d7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 12:55:45,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:55:45,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:55:45,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 213 conjunts are in the unsatisfiable core [2022-11-20 12:55:45,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:55:46,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:55:46,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-20 12:55:46,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-20 12:55:46,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-20 12:55:46,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-20 12:55:46,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-20 12:55:46,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-20 12:55:46,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-20 12:55:46,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-20 12:55:46,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-20 12:55:46,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-20 12:55:46,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-20 12:55:47,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-20 12:55:47,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-20 12:55:47,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-20 12:55:47,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-20 12:55:47,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-20 12:55:47,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:55:47,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:55:47,399 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-20 12:55:47,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 40 [2022-11-20 12:55:47,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:55:47,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:55:47,680 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:55:47,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 40 [2022-11-20 12:55:47,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 26 [2022-11-20 12:55:47,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 26 [2022-11-20 12:55:51,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 2539 proven. 3110 refuted. 0 times theorem prover too weak. 617 trivial. 0 not checked. [2022-11-20 12:55:51,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:56:15,420 INFO L321 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2022-11-20 12:56:15,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 30 [2022-11-20 12:56:18,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 2673 proven. 2578 refuted. 0 times theorem prover too weak. 1015 trivial. 0 not checked. [2022-11-20 12:56:18,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778388736] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:56:18,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:56:18,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 84, 80] total 173 [2022-11-20 12:56:18,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988620454] [2022-11-20 12:56:18,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:56:18,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 173 states [2022-11-20 12:56:18,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:56:18,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2022-11-20 12:56:18,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=943, Invalid=28813, Unknown=0, NotChecked=0, Total=29756 [2022-11-20 12:56:18,363 INFO L87 Difference]: Start difference. First operand 15592 states and 21719 transitions. Second operand has 173 states, 173 states have (on average 2.2658959537572256) internal successors, (392), 171 states have internal predecessors, (392), 5 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-20 12:57:43,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:57:43,597 INFO L93 Difference]: Finished difference Result 51651 states and 73063 transitions. [2022-11-20 12:57:43,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2022-11-20 12:57:43,598 INFO L78 Accepts]: Start accepts. Automaton has has 173 states, 173 states have (on average 2.2658959537572256) internal successors, (392), 171 states have internal predecessors, (392), 5 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 286 [2022-11-20 12:57:43,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:57:43,776 INFO L225 Difference]: With dead ends: 51651 [2022-11-20 12:57:43,776 INFO L226 Difference]: Without dead ends: 33386 [2022-11-20 12:57:43,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 819 GetRequests, 537 SyntacticMatches, 17 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21675 ImplicationChecksByTransitivity, 103.3s TimeCoverageRelationStatistics Valid=3360, Invalid=67661, Unknown=1, NotChecked=0, Total=71022 [2022-11-20 12:57:43,872 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 298 mSDsluCounter, 9209 mSDsCounter, 0 mSdLazyCounter, 10337 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 9333 SdHoareTripleChecker+Invalid, 19016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 10337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8621 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:57:43,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 9333 Invalid, 19016 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [58 Valid, 10337 Invalid, 0 Unknown, 8621 Unchecked, 7.8s Time]