./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/xor3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/xor3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --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 c89c2ec3a6d8d6162c4c4ac97fed99fb9c343c7a2c2e60d87226da2b47103d07 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:24:21,379 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:24:21,444 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 02:24:21,449 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:24:21,450 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:24:21,473 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:24:21,474 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:24:21,474 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:24:21,475 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:24:21,476 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:24:21,476 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:24:21,477 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:24:21,477 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:24:21,478 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:24:21,478 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:24:21,479 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:24:21,480 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 02:24:21,480 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:24:21,480 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:24:21,481 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:24:21,481 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:24:21,486 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 02:24:21,486 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:24:21,487 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 02:24:21,487 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:24:21,487 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 02:24:21,488 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:24:21,488 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:24:21,489 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:24:21,489 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:24:21,489 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:24:21,490 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:24:21,490 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:24:21,490 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:24:21,490 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 02:24:21,491 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:24:21,491 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:24:21,491 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:24:21,491 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:24:21,491 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 02:24:21,492 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:24:21,492 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:24:21,492 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c89c2ec3a6d8d6162c4c4ac97fed99fb9c343c7a2c2e60d87226da2b47103d07 [2023-11-29 02:24:21,706 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:24:21,725 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:24:21,728 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:24:21,729 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:24:21,729 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:24:21,730 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-crafted/xor3.i [2023-11-29 02:24:24,432 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:24:24,627 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:24:24,628 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/sv-benchmarks/c/array-crafted/xor3.i [2023-11-29 02:24:24,633 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/data/4ab51dacf/6bc199cd9ed3472aaea3aae0095f919f/FLAG100ce6592 [2023-11-29 02:24:24,644 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/data/4ab51dacf/6bc199cd9ed3472aaea3aae0095f919f [2023-11-29 02:24:24,646 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:24:24,647 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:24:24,648 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:24:24,648 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:24:24,653 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:24:24,653 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:24:24" (1/1) ... [2023-11-29 02:24:24,654 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3050fc5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:24:24, skipping insertion in model container [2023-11-29 02:24:24,654 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:24:24" (1/1) ... [2023-11-29 02:24:24,672 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:24:24,801 WARN L240 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_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/sv-benchmarks/c/array-crafted/xor3.i[1297,1310] [2023-11-29 02:24:24,805 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:24:24,813 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:24:24,833 WARN L240 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_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/sv-benchmarks/c/array-crafted/xor3.i[1297,1310] [2023-11-29 02:24:24,834 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:24:24,846 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:24:24,846 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:24:24 WrapperNode [2023-11-29 02:24:24,846 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:24:24,847 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:24:24,847 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:24:24,847 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:24:24,853 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:24:24" (1/1) ... [2023-11-29 02:24:24,859 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:24:24" (1/1) ... [2023-11-29 02:24:24,879 INFO L138 Inliner]: procedures = 16, calls = 30, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 76 [2023-11-29 02:24:24,880 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:24:24,880 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:24:24,881 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:24:24,881 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:24:24,889 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:24:24" (1/1) ... [2023-11-29 02:24:24,889 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:24:24" (1/1) ... [2023-11-29 02:24:24,892 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:24:24" (1/1) ... [2023-11-29 02:24:24,905 INFO L175 MemorySlicer]: Split 20 memory accesses to 3 slices as follows [2, 7, 11]. 55 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0]. The 5 writes are split as follows [0, 0, 5]. [2023-11-29 02:24:24,905 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:24:24" (1/1) ... [2023-11-29 02:24:24,905 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:24:24" (1/1) ... [2023-11-29 02:24:24,912 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:24:24" (1/1) ... [2023-11-29 02:24:24,916 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:24:24" (1/1) ... [2023-11-29 02:24:24,917 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:24:24" (1/1) ... [2023-11-29 02:24:24,918 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:24:24" (1/1) ... [2023-11-29 02:24:24,921 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:24:24,922 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:24:24,922 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:24:24,922 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:24:24,923 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:24:24" (1/1) ... [2023-11-29 02:24:24,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:24:24,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:24:24,948 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:24:24,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:24:24,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:24:24,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 02:24:24,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 02:24:24,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 02:24:24,983 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 02:24:24,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 02:24:24,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 02:24:24,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 02:24:24,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:24:24,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:24:24,983 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 02:24:24,984 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 02:24:24,984 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 02:24:24,984 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2023-11-29 02:24:24,984 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2023-11-29 02:24:24,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 02:24:25,075 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:24:25,078 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:24:25,239 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:24:25,268 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:24:25,268 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 02:24:25,268 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:24:25 BoogieIcfgContainer [2023-11-29 02:24:25,268 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:24:25,271 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:24:25,272 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:24:25,275 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:24:25,275 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:24:24" (1/3) ... [2023-11-29 02:24:25,276 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ed59f3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:24:25, skipping insertion in model container [2023-11-29 02:24:25,276 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:24:24" (2/3) ... [2023-11-29 02:24:25,276 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ed59f3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:24:25, skipping insertion in model container [2023-11-29 02:24:25,277 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:24:25" (3/3) ... [2023-11-29 02:24:25,278 INFO L112 eAbstractionObserver]: Analyzing ICFG xor3.i [2023-11-29 02:24:25,297 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:24:25,298 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 02:24:25,337 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:24:25,344 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=LoopHeads, 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;@36d48650, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:24:25,344 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 02:24:25,347 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 19 states have internal predecessors, (29), 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) [2023-11-29 02:24:25,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-29 02:24:25,354 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:24:25,354 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:24:25,355 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:24:25,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:24:25,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1380801659, now seen corresponding path program 1 times [2023-11-29 02:24:25,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:24:25,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594561701] [2023-11-29 02:24:25,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:24:25,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:24:25,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:25,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 02:24:25,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:25,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 02:24:25,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:25,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 02:24:25,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:25,641 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 02:24:25,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:24:25,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594561701] [2023-11-29 02:24:25,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594561701] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:24:25,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414295840] [2023-11-29 02:24:25,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:24:25,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:24:25,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:24:25,652 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:24:25,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:24:25,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:25,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 02:24:25,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:24:25,784 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:24:25,785 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:24:25,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414295840] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:24:25,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:24:25,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2023-11-29 02:24:25,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784552589] [2023-11-29 02:24:25,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:24:25,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 02:24:25,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:24:25,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 02:24:25,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:24:25,825 INFO L87 Difference]: Start difference. First operand has 24 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 19 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 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) [2023-11-29 02:24:25,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:24:25,859 INFO L93 Difference]: Finished difference Result 46 states and 69 transitions. [2023-11-29 02:24:25,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 02:24:25,861 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 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 25 [2023-11-29 02:24:25,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:24:25,869 INFO L225 Difference]: With dead ends: 46 [2023-11-29 02:24:25,869 INFO L226 Difference]: Without dead ends: 22 [2023-11-29 02:24:25,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:24:25,876 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 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 [2023-11-29 02:24:25,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:24:25,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-29 02:24:25,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-29 02:24:25,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 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) [2023-11-29 02:24:25,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2023-11-29 02:24:25,916 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 25 [2023-11-29 02:24:25,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:24:25,918 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2023-11-29 02:24:25,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 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) [2023-11-29 02:24:25,918 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2023-11-29 02:24:25,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-29 02:24:25,920 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:24:25,920 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:24:25,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 02:24:26,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:24:26,126 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:24:26,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:24:26,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1735084607, now seen corresponding path program 1 times [2023-11-29 02:24:26,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:24:26,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325056627] [2023-11-29 02:24:26,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:24:26,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:24:26,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:26,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 02:24:26,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:26,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 02:24:26,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:26,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 02:24:26,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:26,243 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 02:24:26,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:24:26,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325056627] [2023-11-29 02:24:26,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325056627] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:24:26,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788675172] [2023-11-29 02:24:26,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:24:26,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:24:26,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:24:26,246 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:24:26,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 02:24:26,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:26,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 02:24:26,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:24:26,344 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 02:24:26,344 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:24:26,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788675172] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:24:26,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:24:26,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-29 02:24:26,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354704286] [2023-11-29 02:24:26,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:24:26,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:24:26,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:24:26,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:24:26,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:24:26,348 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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) [2023-11-29 02:24:26,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:24:26,368 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2023-11-29 02:24:26,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:24:26,369 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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 25 [2023-11-29 02:24:26,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:24:26,370 INFO L225 Difference]: With dead ends: 43 [2023-11-29 02:24:26,370 INFO L226 Difference]: Without dead ends: 23 [2023-11-29 02:24:26,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:24:26,372 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:24:26,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:24:26,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-29 02:24:26,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-29 02:24:26,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 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) [2023-11-29 02:24:26,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2023-11-29 02:24:26,379 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 25 [2023-11-29 02:24:26,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:24:26,380 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2023-11-29 02:24:26,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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) [2023-11-29 02:24:26,380 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2023-11-29 02:24:26,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-29 02:24:26,382 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:24:26,382 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:24:26,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 02:24:26,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-29 02:24:26,583 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:24:26,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:24:26,583 INFO L85 PathProgramCache]: Analyzing trace with hash 2127840843, now seen corresponding path program 1 times [2023-11-29 02:24:26,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:24:26,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91695750] [2023-11-29 02:24:26,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:24:26,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:24:26,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:26,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-29 02:24:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:26,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 02:24:26,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:26,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-11-29 02:24:26,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:26,681 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 02:24:26,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:24:26,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91695750] [2023-11-29 02:24:26,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91695750] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:24:26,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154953618] [2023-11-29 02:24:26,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:24:26,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:24:26,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:24:26,683 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:24:26,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 02:24:26,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:26,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 02:24:26,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:24:26,765 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 02:24:26,766 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:24:26,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154953618] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:24:26,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:24:26,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-11-29 02:24:26,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62019047] [2023-11-29 02:24:26,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:24:26,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:24:26,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:24:26,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:24:26,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:24:26,768 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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) [2023-11-29 02:24:26,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:24:26,789 INFO L93 Difference]: Finished difference Result 46 states and 65 transitions. [2023-11-29 02:24:26,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:24:26,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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 26 [2023-11-29 02:24:26,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:24:26,791 INFO L225 Difference]: With dead ends: 46 [2023-11-29 02:24:26,791 INFO L226 Difference]: Without dead ends: 28 [2023-11-29 02:24:26,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:24:26,792 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:24:26,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 44 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:24:26,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-29 02:24:26,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2023-11-29 02:24:26,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 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) [2023-11-29 02:24:26,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2023-11-29 02:24:26,799 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 26 [2023-11-29 02:24:26,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:24:26,799 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2023-11-29 02:24:26,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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) [2023-11-29 02:24:26,799 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2023-11-29 02:24:26,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-29 02:24:26,800 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:24:26,801 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:24:26,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 02:24:27,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:24:27,004 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:24:27,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:24:27,004 INFO L85 PathProgramCache]: Analyzing trace with hash -2015595361, now seen corresponding path program 1 times [2023-11-29 02:24:27,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:24:27,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588970043] [2023-11-29 02:24:27,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:24:27,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:24:27,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:27,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-29 02:24:27,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:27,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-29 02:24:27,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:27,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-29 02:24:27,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:27,108 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 02:24:27,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:24:27,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588970043] [2023-11-29 02:24:27,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588970043] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:24:27,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691664014] [2023-11-29 02:24:27,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:24:27,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:24:27,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:24:27,110 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:24:27,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 02:24:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:27,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 02:24:27,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:24:27,205 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 02:24:27,205 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:24:27,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691664014] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:24:27,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:24:27,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-29 02:24:27,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165853148] [2023-11-29 02:24:27,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:24:27,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:24:27,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:24:27,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:24:27,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:24:27,215 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2023-11-29 02:24:27,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:24:27,237 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2023-11-29 02:24:27,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:24:27,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 35 [2023-11-29 02:24:27,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:24:27,240 INFO L225 Difference]: With dead ends: 40 [2023-11-29 02:24:27,240 INFO L226 Difference]: Without dead ends: 25 [2023-11-29 02:24:27,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:24:27,241 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:24:27,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:24:27,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-29 02:24:27,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-29 02:24:27,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 02:24:27,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2023-11-29 02:24:27,252 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 35 [2023-11-29 02:24:27,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:24:27,252 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2023-11-29 02:24:27,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2023-11-29 02:24:27,252 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2023-11-29 02:24:27,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-29 02:24:27,253 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:24:27,254 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:24:27,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 02:24:27,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:24:27,454 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:24:27,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:24:27,455 INFO L85 PathProgramCache]: Analyzing trace with hash 2101539649, now seen corresponding path program 1 times [2023-11-29 02:24:27,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:24:27,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049680322] [2023-11-29 02:24:27,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:24:27,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:24:27,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:27,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-29 02:24:27,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:27,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-29 02:24:27,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:27,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-29 02:24:27,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:27,544 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 02:24:27,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:24:27,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049680322] [2023-11-29 02:24:27,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049680322] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:24:27,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101876866] [2023-11-29 02:24:27,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:24:27,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:24:27,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:24:27,546 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:24:27,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 02:24:27,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:27,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 02:24:27,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:24:27,665 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-29 02:24:27,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:24:27,699 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-29 02:24:27,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101876866] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:24:27,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:24:27,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 4] total 9 [2023-11-29 02:24:27,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914642799] [2023-11-29 02:24:27,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:24:27,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 02:24:27,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:24:27,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 02:24:27,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-29 02:24:27,702 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 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) [2023-11-29 02:24:27,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:24:27,751 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2023-11-29 02:24:27,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 02:24:27,752 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 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 36 [2023-11-29 02:24:27,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:24:27,753 INFO L225 Difference]: With dead ends: 59 [2023-11-29 02:24:27,753 INFO L226 Difference]: Without dead ends: 37 [2023-11-29 02:24:27,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-29 02:24:27,754 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 12 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:24:27,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 149 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:24:27,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-29 02:24:27,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2023-11-29 02:24:27,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 02:24:27,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2023-11-29 02:24:27,761 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 36 [2023-11-29 02:24:27,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:24:27,761 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2023-11-29 02:24:27,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 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) [2023-11-29 02:24:27,761 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2023-11-29 02:24:27,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-29 02:24:27,763 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:24:27,763 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:24:27,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 02:24:27,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:24:27,964 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:24:27,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:24:27,964 INFO L85 PathProgramCache]: Analyzing trace with hash -90819289, now seen corresponding path program 2 times [2023-11-29 02:24:27,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:24:27,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023365927] [2023-11-29 02:24:27,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:24:27,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:24:27,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:28,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 02:24:28,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:28,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 02:24:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:28,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-29 02:24:28,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:28,071 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-11-29 02:24:28,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:24:28,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023365927] [2023-11-29 02:24:28,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023365927] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:24:28,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118210201] [2023-11-29 02:24:28,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:24:28,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:24:28,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:24:28,073 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:24:28,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 02:24:28,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:24:28,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:24:28,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:24:28,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:24:28,223 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-29 02:24:28,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:24:28,295 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-29 02:24:28,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118210201] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:24:28,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:24:28,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2023-11-29 02:24:28,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785069020] [2023-11-29 02:24:28,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:24:28,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 02:24:28,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:24:28,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 02:24:28,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-29 02:24:28,298 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 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) [2023-11-29 02:24:28,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:24:28,353 INFO L93 Difference]: Finished difference Result 67 states and 93 transitions. [2023-11-29 02:24:28,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 02:24:28,354 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 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 48 [2023-11-29 02:24:28,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:24:28,355 INFO L225 Difference]: With dead ends: 67 [2023-11-29 02:24:28,355 INFO L226 Difference]: Without dead ends: 40 [2023-11-29 02:24:28,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-29 02:24:28,357 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:24:28,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 154 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:24:28,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-29 02:24:28,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-11-29 02:24:28,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 35 states have internal predecessors, (44), 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) [2023-11-29 02:24:28,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2023-11-29 02:24:28,364 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 48 [2023-11-29 02:24:28,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:24:28,365 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2023-11-29 02:24:28,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 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) [2023-11-29 02:24:28,365 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2023-11-29 02:24:28,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-29 02:24:28,366 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:24:28,367 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:24:28,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 02:24:28,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:24:28,572 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:24:28,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:24:28,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1606414655, now seen corresponding path program 3 times [2023-11-29 02:24:28,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:24:28,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532586688] [2023-11-29 02:24:28,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:24:28,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:24:28,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:28,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-29 02:24:28,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:28,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-29 02:24:28,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:28,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-29 02:24:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:28,700 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-29 02:24:28,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:24:28,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532586688] [2023-11-29 02:24:28,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532586688] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:24:28,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865745594] [2023-11-29 02:24:28,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:24:28,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:24:28,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:24:28,704 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:24:28,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 02:24:28,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 02:24:28,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:24:28,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 02:24:28,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:24:28,838 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 40 proven. 3 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-29 02:24:28,838 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:24:28,881 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2023-11-29 02:24:28,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865745594] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:24:28,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:24:28,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-29 02:24:28,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128443595] [2023-11-29 02:24:28,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:24:28,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 02:24:28,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:24:28,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 02:24:28,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:24:28,884 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 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) [2023-11-29 02:24:28,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:24:28,926 INFO L93 Difference]: Finished difference Result 79 states and 111 transitions. [2023-11-29 02:24:28,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 02:24:28,926 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 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 55 [2023-11-29 02:24:28,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:24:28,927 INFO L225 Difference]: With dead ends: 79 [2023-11-29 02:24:28,928 INFO L226 Difference]: Without dead ends: 53 [2023-11-29 02:24:28,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:24:28,929 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 22 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:24:28,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 111 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:24:28,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-29 02:24:28,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2023-11-29 02:24:28,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 44 states have internal predecessors, (56), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 02:24:28,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2023-11-29 02:24:28,937 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 55 [2023-11-29 02:24:28,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:24:28,937 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2023-11-29 02:24:28,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 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) [2023-11-29 02:24:28,937 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2023-11-29 02:24:28,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-29 02:24:28,939 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:24:28,939 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:24:28,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 02:24:29,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:24:29,144 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:24:29,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:24:29,144 INFO L85 PathProgramCache]: Analyzing trace with hash -2129982999, now seen corresponding path program 4 times [2023-11-29 02:24:29,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:24:29,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630717780] [2023-11-29 02:24:29,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:24:29,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:24:29,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:29,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-29 02:24:29,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:29,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 02:24:29,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:29,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-11-29 02:24:29,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:29,405 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2023-11-29 02:24:29,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:24:29,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630717780] [2023-11-29 02:24:29,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630717780] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:24:29,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995905167] [2023-11-29 02:24:29,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:24:29,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:24:29,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:24:29,406 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:24:29,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 02:24:29,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:24:29,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:24:29,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 02:24:29,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:24:29,598 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2023-11-29 02:24:29,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:24:29,689 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2023-11-29 02:24:29,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995905167] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:24:29,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:24:29,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 21 [2023-11-29 02:24:29,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327009596] [2023-11-29 02:24:29,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:24:29,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 02:24:29,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:24:29,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 02:24:29,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2023-11-29 02:24:29,693 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 02:24:29,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:24:29,762 INFO L93 Difference]: Finished difference Result 112 states and 161 transitions. [2023-11-29 02:24:29,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 02:24:29,763 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 68 [2023-11-29 02:24:29,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:24:29,764 INFO L225 Difference]: With dead ends: 112 [2023-11-29 02:24:29,765 INFO L226 Difference]: Without dead ends: 75 [2023-11-29 02:24:29,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2023-11-29 02:24:29,766 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 74 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:24:29,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 152 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:24:29,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-29 02:24:29,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-11-29 02:24:29,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.3857142857142857) internal successors, (97), 70 states have internal predecessors, (97), 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) [2023-11-29 02:24:29,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 103 transitions. [2023-11-29 02:24:29,777 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 103 transitions. Word has length 68 [2023-11-29 02:24:29,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:24:29,777 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 103 transitions. [2023-11-29 02:24:29,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 02:24:29,778 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 103 transitions. [2023-11-29 02:24:29,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-11-29 02:24:29,780 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:24:29,780 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 11, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:24:29,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 02:24:29,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 02:24:29,984 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:24:29,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:24:29,984 INFO L85 PathProgramCache]: Analyzing trace with hash 943250635, now seen corresponding path program 5 times [2023-11-29 02:24:29,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:24:29,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918166197] [2023-11-29 02:24:29,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:24:29,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:24:30,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:30,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 02:24:30,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:30,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-29 02:24:30,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:30,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2023-11-29 02:24:30,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:30,370 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 933 trivial. 0 not checked. [2023-11-29 02:24:30,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:24:30,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918166197] [2023-11-29 02:24:30,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918166197] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:24:30,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39234280] [2023-11-29 02:24:30,371 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:24:30,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:24:30,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:24:30,372 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:24:30,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 02:24:31,022 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2023-11-29 02:24:31,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:24:31,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 02:24:31,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:24:31,177 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 420 proven. 92 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2023-11-29 02:24:31,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:24:31,399 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 0 proven. 514 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2023-11-29 02:24:31,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39234280] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:24:31,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:24:31,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 32 [2023-11-29 02:24:31,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728974798] [2023-11-29 02:24:31,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:24:31,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 02:24:31,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:24:31,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 02:24:31,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2023-11-29 02:24:31,403 INFO L87 Difference]: Start difference. First operand 75 states and 103 transitions. Second operand has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 02:24:31,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:24:31,510 INFO L93 Difference]: Finished difference Result 188 states and 287 transitions. [2023-11-29 02:24:31,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 02:24:31,510 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 114 [2023-11-29 02:24:31,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:24:31,513 INFO L225 Difference]: With dead ends: 188 [2023-11-29 02:24:31,513 INFO L226 Difference]: Without dead ends: 126 [2023-11-29 02:24:31,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2023-11-29 02:24:31,516 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 234 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:24:31,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 227 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:24:31,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-29 02:24:31,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2023-11-29 02:24:31,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.4710743801652892) internal successors, (178), 121 states have internal predecessors, (178), 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) [2023-11-29 02:24:31,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 184 transitions. [2023-11-29 02:24:31,531 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 184 transitions. Word has length 114 [2023-11-29 02:24:31,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:24:31,531 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 184 transitions. [2023-11-29 02:24:31,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 02:24:31,532 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 184 transitions. [2023-11-29 02:24:31,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2023-11-29 02:24:31,536 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:24:31,536 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 12, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:24:31,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 02:24:31,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:24:31,743 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:24:31,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:24:31,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1178683777, now seen corresponding path program 6 times [2023-11-29 02:24:31,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:24:31,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030552673] [2023-11-29 02:24:31,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:24:31,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:24:31,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:32,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 02:24:32,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:32,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-11-29 02:24:32,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:32,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2023-11-29 02:24:32,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4566 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 4488 trivial. 0 not checked. [2023-11-29 02:24:32,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:24:32,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030552673] [2023-11-29 02:24:32,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030552673] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:24:32,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705429732] [2023-11-29 02:24:32,258 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:24:32,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:24:32,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:24:32,260 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:24:32,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 02:24:32,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-11-29 02:24:32,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:24:32,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 02:24:32,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:24:32,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4566 backedges. 2024 proven. 21 refuted. 0 times theorem prover too weak. 2521 trivial. 0 not checked. [2023-11-29 02:24:32,827 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:24:32,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4566 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4545 trivial. 0 not checked. [2023-11-29 02:24:32,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705429732] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:24:32,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:24:32,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2023-11-29 02:24:32,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544779843] [2023-11-29 02:24:32,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:24:32,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 02:24:32,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:24:32,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 02:24:32,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2023-11-29 02:24:32,993 INFO L87 Difference]: Start difference. First operand 126 states and 184 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 02:24:33,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:24:33,046 INFO L93 Difference]: Finished difference Result 247 states and 371 transitions. [2023-11-29 02:24:33,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 02:24:33,046 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 2 states have call successors, (6), 2 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 205 [2023-11-29 02:24:33,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:24:33,048 INFO L225 Difference]: With dead ends: 247 [2023-11-29 02:24:33,048 INFO L226 Difference]: Without dead ends: 135 [2023-11-29 02:24:33,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2023-11-29 02:24:33,050 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:24:33,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 132 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:24:33,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-29 02:24:33,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2023-11-29 02:24:33,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.4384615384615385) internal successors, (187), 130 states have internal predecessors, (187), 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) [2023-11-29 02:24:33,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 193 transitions. [2023-11-29 02:24:33,064 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 193 transitions. Word has length 205 [2023-11-29 02:24:33,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:24:33,065 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 193 transitions. [2023-11-29 02:24:33,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 02:24:33,065 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 193 transitions. [2023-11-29 02:24:33,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2023-11-29 02:24:33,068 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:24:33,068 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 14, 13, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:24:33,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 02:24:33,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 02:24:33,268 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:24:33,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:24:33,269 INFO L85 PathProgramCache]: Analyzing trace with hash -456273397, now seen corresponding path program 7 times [2023-11-29 02:24:33,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:24:33,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286423311] [2023-11-29 02:24:33,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:24:33,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:24:33,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:33,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 02:24:33,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:33,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-11-29 02:24:33,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:33,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2023-11-29 02:24:33,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:33,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4663 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-11-29 02:24:33,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:24:33,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286423311] [2023-11-29 02:24:33,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286423311] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:24:33,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515915655] [2023-11-29 02:24:33,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:24:33,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:24:33,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:24:33,688 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:24:33,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 02:24:33,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:33,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 944 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 02:24:33,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:24:33,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4663 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-11-29 02:24:33,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:24:34,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4663 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-11-29 02:24:34,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515915655] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:24:34,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:24:34,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 31 [2023-11-29 02:24:34,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873105268] [2023-11-29 02:24:34,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:24:34,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 02:24:34,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:24:34,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 02:24:34,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2023-11-29 02:24:34,309 INFO L87 Difference]: Start difference. First operand 135 states and 193 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 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) [2023-11-29 02:24:34,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:24:34,366 INFO L93 Difference]: Finished difference Result 270 states and 400 transitions. [2023-11-29 02:24:34,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 02:24:34,367 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 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 214 [2023-11-29 02:24:34,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:24:34,368 INFO L225 Difference]: With dead ends: 270 [2023-11-29 02:24:34,368 INFO L226 Difference]: Without dead ends: 150 [2023-11-29 02:24:34,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2023-11-29 02:24:34,370 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:24:34,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 134 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:24:34,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-11-29 02:24:34,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2023-11-29 02:24:34,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.393103448275862) internal successors, (202), 145 states have internal predecessors, (202), 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) [2023-11-29 02:24:34,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 208 transitions. [2023-11-29 02:24:34,383 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 208 transitions. Word has length 214 [2023-11-29 02:24:34,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:24:34,383 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 208 transitions. [2023-11-29 02:24:34,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 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) [2023-11-29 02:24:34,383 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 208 transitions. [2023-11-29 02:24:34,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2023-11-29 02:24:34,386 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:24:34,387 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 28, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:24:34,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 02:24:34,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 02:24:34,587 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:24:34,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:24:34,588 INFO L85 PathProgramCache]: Analyzing trace with hash 424224385, now seen corresponding path program 8 times [2023-11-29 02:24:34,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:24:34,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532961802] [2023-11-29 02:24:34,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:24:34,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:24:34,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:35,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-29 02:24:35,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:35,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 02:24:35,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:35,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2023-11-29 02:24:35,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:35,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4978 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-11-29 02:24:35,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:24:35,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532961802] [2023-11-29 02:24:35,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532961802] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:24:35,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075764762] [2023-11-29 02:24:35,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:24:35,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:24:35,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:24:35,796 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:24:35,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 02:24:36,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:24:36,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:24:36,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 1079 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 02:24:36,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:24:36,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4978 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-11-29 02:24:36,185 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:24:37,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4978 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-11-29 02:24:37,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075764762] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:24:37,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:24:37,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 31] total 61 [2023-11-29 02:24:37,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356643588] [2023-11-29 02:24:37,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:24:37,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-11-29 02:24:37,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:24:37,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-11-29 02:24:37,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2023-11-29 02:24:37,197 INFO L87 Difference]: Start difference. First operand 150 states and 208 transitions. Second operand has 61 states, 61 states have (on average 1.360655737704918) internal successors, (83), 61 states have internal predecessors, (83), 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) [2023-11-29 02:24:37,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:24:37,281 INFO L93 Difference]: Finished difference Result 300 states and 445 transitions. [2023-11-29 02:24:37,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-29 02:24:37,281 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.360655737704918) internal successors, (83), 61 states have internal predecessors, (83), 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 229 [2023-11-29 02:24:37,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:24:37,283 INFO L225 Difference]: With dead ends: 300 [2023-11-29 02:24:37,283 INFO L226 Difference]: Without dead ends: 180 [2023-11-29 02:24:37,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2023-11-29 02:24:37,285 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:24:37,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 90 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:24:37,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-11-29 02:24:37,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2023-11-29 02:24:37,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 175 states have (on average 1.3257142857142856) internal successors, (232), 175 states have internal predecessors, (232), 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) [2023-11-29 02:24:37,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 238 transitions. [2023-11-29 02:24:37,298 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 238 transitions. Word has length 229 [2023-11-29 02:24:37,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:24:37,298 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 238 transitions. [2023-11-29 02:24:37,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.360655737704918) internal successors, (83), 61 states have internal predecessors, (83), 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) [2023-11-29 02:24:37,299 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 238 transitions. [2023-11-29 02:24:37,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2023-11-29 02:24:37,301 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:24:37,302 INFO L195 NwaCegarLoop]: trace histogram [58, 54, 54, 54, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:24:37,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 02:24:37,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 02:24:37,502 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:24:37,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:24:37,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1169439041, now seen corresponding path program 9 times [2023-11-29 02:24:37,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:24:37,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341801203] [2023-11-29 02:24:37,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:24:37,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:24:37,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:40,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-11-29 02:24:40,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:40,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2023-11-29 02:24:40,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:40,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2023-11-29 02:24:40,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:40,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6283 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-11-29 02:24:40,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:24:40,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341801203] [2023-11-29 02:24:40,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341801203] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:24:40,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599855802] [2023-11-29 02:24:40,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:24:40,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:24:40,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:24:40,170 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:24:40,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 02:24:42,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-29 02:24:42,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:24:42,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 02:24:42,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:24:43,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6283 backedges. 2024 proven. 105 refuted. 0 times theorem prover too weak. 4154 trivial. 0 not checked. [2023-11-29 02:24:43,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:24:43,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6283 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 6178 trivial. 0 not checked. [2023-11-29 02:24:43,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599855802] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:24:43,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:24:43,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 17, 17] total 91 [2023-11-29 02:24:43,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910142297] [2023-11-29 02:24:43,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:24:43,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2023-11-29 02:24:43,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:24:43,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2023-11-29 02:24:43,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2325, Invalid=5865, Unknown=0, NotChecked=0, Total=8190 [2023-11-29 02:24:43,648 INFO L87 Difference]: Start difference. First operand 180 states and 238 transitions. Second operand has 91 states, 91 states have (on average 1.2967032967032968) internal successors, (118), 91 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 02:24:43,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:24:43,787 INFO L93 Difference]: Finished difference Result 317 states and 449 transitions. [2023-11-29 02:24:43,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-11-29 02:24:43,788 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.2967032967032968) internal successors, (118), 91 states have internal predecessors, (118), 2 states have call successors, (6), 2 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 259 [2023-11-29 02:24:43,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:24:43,790 INFO L225 Difference]: With dead ends: 317 [2023-11-29 02:24:43,790 INFO L226 Difference]: Without dead ends: 197 [2023-11-29 02:24:43,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2325, Invalid=5865, Unknown=0, NotChecked=0, Total=8190 [2023-11-29 02:24:43,793 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:24:43,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 238 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:24:43,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-11-29 02:24:43,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2023-11-29 02:24:43,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.296875) internal successors, (249), 192 states have internal predecessors, (249), 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) [2023-11-29 02:24:43,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 255 transitions. [2023-11-29 02:24:43,803 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 255 transitions. Word has length 259 [2023-11-29 02:24:43,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:24:43,804 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 255 transitions. [2023-11-29 02:24:43,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.2967032967032968) internal successors, (118), 91 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 02:24:43,804 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 255 transitions. [2023-11-29 02:24:43,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2023-11-29 02:24:43,807 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:24:43,807 INFO L195 NwaCegarLoop]: trace histogram [59, 54, 54, 54, 30, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:24:43,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 02:24:44,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 02:24:44,008 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:24:44,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:24:44,008 INFO L85 PathProgramCache]: Analyzing trace with hash 833871691, now seen corresponding path program 10 times [2023-11-29 02:24:44,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:24:44,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443082125] [2023-11-29 02:24:44,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:24:44,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:24:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:46,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-11-29 02:24:46,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:46,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2023-11-29 02:24:46,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:46,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2023-11-29 02:24:46,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:46,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6702 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 4932 trivial. 0 not checked. [2023-11-29 02:24:46,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:24:46,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443082125] [2023-11-29 02:24:46,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443082125] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:24:46,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668881078] [2023-11-29 02:24:46,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:24:46,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:24:46,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:24:46,905 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:24:46,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 02:24:47,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:24:47,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:24:47,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 1470 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 02:24:47,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:24:47,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6702 backedges. 2022 proven. 477 refuted. 0 times theorem prover too weak. 4203 trivial. 0 not checked. [2023-11-29 02:24:47,835 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:24:48,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6702 backedges. 2022 proven. 477 refuted. 0 times theorem prover too weak. 4203 trivial. 0 not checked. [2023-11-29 02:24:48,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668881078] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:24:48,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:24:48,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 21, 21] total 100 [2023-11-29 02:24:48,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973851154] [2023-11-29 02:24:48,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:24:48,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2023-11-29 02:24:48,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:24:48,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2023-11-29 02:24:48,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2670, Invalid=7230, Unknown=0, NotChecked=0, Total=9900 [2023-11-29 02:24:48,597 INFO L87 Difference]: Start difference. First operand 197 states and 255 transitions. Second operand has 100 states, 100 states have (on average 1.98) internal successors, (198), 100 states have internal predecessors, (198), 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) [2023-11-29 02:24:48,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:24:48,865 INFO L93 Difference]: Finished difference Result 434 states and 633 transitions. [2023-11-29 02:24:48,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-11-29 02:24:48,865 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.98) internal successors, (198), 100 states have internal predecessors, (198), 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 276 [2023-11-29 02:24:48,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:24:48,868 INFO L225 Difference]: With dead ends: 434 [2023-11-29 02:24:48,868 INFO L226 Difference]: Without dead ends: 298 [2023-11-29 02:24:48,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2242 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2670, Invalid=7230, Unknown=0, NotChecked=0, Total=9900 [2023-11-29 02:24:48,873 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 559 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:24:48,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 425 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:24:48,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2023-11-29 02:24:48,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2023-11-29 02:24:48,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 293 states have (on average 1.3993174061433447) internal successors, (410), 293 states have internal predecessors, (410), 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) [2023-11-29 02:24:48,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 416 transitions. [2023-11-29 02:24:48,885 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 416 transitions. Word has length 276 [2023-11-29 02:24:48,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:24:48,886 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 416 transitions. [2023-11-29 02:24:48,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.98) internal successors, (198), 100 states have internal predecessors, (198), 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) [2023-11-29 02:24:48,886 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 416 transitions. [2023-11-29 02:24:48,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2023-11-29 02:24:48,893 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:24:48,893 INFO L195 NwaCegarLoop]: trace histogram [114, 114, 114, 60, 30, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:24:48,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 02:24:49,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 02:24:49,093 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:24:49,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:24:49,094 INFO L85 PathProgramCache]: Analyzing trace with hash -2055562111, now seen corresponding path program 11 times [2023-11-29 02:24:49,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:24:49,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795513585] [2023-11-29 02:24:49,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:24:49,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:24:49,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:51,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 02:24:51,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:51,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2023-11-29 02:24:51,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:51,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 335 [2023-11-29 02:24:51,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:51,805 INFO L134 CoverageAnalysis]: Checked inductivity of 21972 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 20142 trivial. 0 not checked. [2023-11-29 02:24:51,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:24:51,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795513585] [2023-11-29 02:24:51,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795513585] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:24:51,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985596672] [2023-11-29 02:24:51,806 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:24:51,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:24:51,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:24:51,807 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:24:51,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18566a6-138b-4bdb-b4ee-2234d9dbe9b6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process