./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_init6_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_init6_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/bin/uautomizer-verify-VRDe98Ueme --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 388c926a79a6b5e7bef889b40d9a18e5c4aeb62f40be1f5a1ab2f0fe0344f6c1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 12:04:56,308 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 12:04:56,399 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 12:04:56,404 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 12:04:56,404 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 12:04:56,430 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 12:04:56,431 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 12:04:56,431 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 12:04:56,432 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 12:04:56,433 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 12:04:56,433 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 12:04:56,434 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 12:04:56,435 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 12:04:56,435 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 12:04:56,436 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 12:04:56,437 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 12:04:56,437 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 12:04:56,438 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 12:04:56,438 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 12:04:56,439 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 12:04:56,439 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 12:04:56,440 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 12:04:56,440 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 12:04:56,441 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 12:04:56,441 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 12:04:56,442 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 12:04:56,442 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 12:04:56,443 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 12:04:56,443 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 12:04:56,443 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 12:04:56,444 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 12:04:56,444 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:04:56,445 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 12:04:56,445 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 12:04:56,446 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 12:04:56,446 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 12:04:56,447 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 12:04:56,447 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 12:04:56,469 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 12:04:56,469 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 12:04:56,470 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 12:04:56,471 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 12:04:56,472 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_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 388c926a79a6b5e7bef889b40d9a18e5c4aeb62f40be1f5a1ab2f0fe0344f6c1 [2023-11-26 12:04:56,787 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 12:04:56,815 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 12:04:56,818 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 12:04:56,819 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 12:04:56,819 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 12:04:56,821 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/array-examples/standard_init6_ground-2.i [2023-11-26 12:05:00,147 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 12:05:00,441 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 12:05:00,442 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/sv-benchmarks/c/array-examples/standard_init6_ground-2.i [2023-11-26 12:05:00,479 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/bin/uautomizer-verify-VRDe98Ueme/data/d19077c5b/f402f470c2954ecb992a8ce3a8ef2ce8/FLAG0ae6968c3 [2023-11-26 12:05:00,499 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/bin/uautomizer-verify-VRDe98Ueme/data/d19077c5b/f402f470c2954ecb992a8ce3a8ef2ce8 [2023-11-26 12:05:00,502 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 12:05:00,504 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 12:05:00,506 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 12:05:00,506 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 12:05:00,514 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 12:05:00,515 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:05:00" (1/1) ... [2023-11-26 12:05:00,517 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c7468b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:00, skipping insertion in model container [2023-11-26 12:05:00,517 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:05:00" (1/1) ... [2023-11-26 12:05:00,542 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 12:05:00,712 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_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/sv-benchmarks/c/array-examples/standard_init6_ground-2.i[816,829] [2023-11-26 12:05:00,732 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:05:00,743 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 12:05:00,759 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_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/sv-benchmarks/c/array-examples/standard_init6_ground-2.i[816,829] [2023-11-26 12:05:00,770 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:05:00,787 INFO L206 MainTranslator]: Completed translation [2023-11-26 12:05:00,788 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:00 WrapperNode [2023-11-26 12:05:00,788 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 12:05:00,789 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 12:05:00,789 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 12:05:00,789 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 12:05:00,798 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:00" (1/1) ... [2023-11-26 12:05:00,807 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:00" (1/1) ... [2023-11-26 12:05:00,830 INFO L138 Inliner]: procedures = 15, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 74 [2023-11-26 12:05:00,830 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 12:05:00,831 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 12:05:00,831 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 12:05:00,832 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 12:05:00,845 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:00" (1/1) ... [2023-11-26 12:05:00,845 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:00" (1/1) ... [2023-11-26 12:05:00,848 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:00" (1/1) ... [2023-11-26 12:05:00,868 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 6 writes are split as follows [0, 6]. [2023-11-26 12:05:00,873 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:00" (1/1) ... [2023-11-26 12:05:00,874 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:00" (1/1) ... [2023-11-26 12:05:00,892 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:00" (1/1) ... [2023-11-26 12:05:00,897 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:00" (1/1) ... [2023-11-26 12:05:00,899 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:00" (1/1) ... [2023-11-26 12:05:00,900 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:00" (1/1) ... [2023-11-26 12:05:00,903 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 12:05:00,905 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 12:05:00,905 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 12:05:00,905 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 12:05:00,906 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:00" (1/1) ... [2023-11-26 12:05:00,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:05:00,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:00,945 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 12:05:00,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 12:05:00,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 12:05:00,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 12:05:00,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 12:05:00,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 12:05:00,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 12:05:00,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 12:05:00,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 12:05:00,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 12:05:00,999 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 12:05:00,999 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 12:05:01,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 12:05:01,102 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 12:05:01,104 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 12:05:01,284 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 12:05:01,320 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 12:05:01,320 INFO L309 CfgBuilder]: Removed 7 assume(true) statements. [2023-11-26 12:05:01,321 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:05:01 BoogieIcfgContainer [2023-11-26 12:05:01,321 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 12:05:01,327 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 12:05:01,327 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 12:05:01,331 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 12:05:01,332 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:05:00" (1/3) ... [2023-11-26 12:05:01,333 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9f854b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:05:01, skipping insertion in model container [2023-11-26 12:05:01,333 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:00" (2/3) ... [2023-11-26 12:05:01,335 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9f854b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:05:01, skipping insertion in model container [2023-11-26 12:05:01,336 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:05:01" (3/3) ... [2023-11-26 12:05:01,337 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_init6_ground-2.i [2023-11-26 12:05:01,360 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 12:05:01,360 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 12:05:01,405 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 12:05:01,413 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;@41daba67, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 12:05:01,413 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 12:05:01,417 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:05:01,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-26 12:05:01,424 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:01,424 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:01,425 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:05:01,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:01,430 INFO L85 PathProgramCache]: Analyzing trace with hash 763992430, now seen corresponding path program 1 times [2023-11-26 12:05:01,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:01,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375247910] [2023-11-26 12:05:01,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:01,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:01,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:01,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:05:01,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:01,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375247910] [2023-11-26 12:05:01,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375247910] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:05:01,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:05:01,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:05:01,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919186294] [2023-11-26 12:05:01,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:05:01,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:05:01,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:01,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:05:01,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:05:01,897 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:05:02,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:02,041 INFO L93 Difference]: Finished difference Result 44 states and 82 transitions. [2023-11-26 12:05:02,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:05:02,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-26 12:05:02,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:02,054 INFO L225 Difference]: With dead ends: 44 [2023-11-26 12:05:02,054 INFO L226 Difference]: Without dead ends: 24 [2023-11-26 12:05:02,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:05:02,064 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:02,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:05:02,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-26 12:05:02,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-26 12:05:02,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:05:02,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2023-11-26 12:05:02,123 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 16 [2023-11-26 12:05:02,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:02,123 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-11-26 12:05:02,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:05:02,124 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2023-11-26 12:05:02,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-26 12:05:02,125 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:02,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:02,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 12:05:02,127 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:05:02,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:02,130 INFO L85 PathProgramCache]: Analyzing trace with hash -178560793, now seen corresponding path program 1 times [2023-11-26 12:05:02,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:02,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256879140] [2023-11-26 12:05:02,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:02,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:02,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:02,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 12:05:02,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:02,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256879140] [2023-11-26 12:05:02,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256879140] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:02,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143243527] [2023-11-26 12:05:02,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:02,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:02,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:02,383 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:05:02,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 12:05:02,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:02,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 12:05:02,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:05:02,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 12:05:02,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:05:02,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 12:05:02,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143243527] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:05:02,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:05:02,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-26 12:05:02,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534097217] [2023-11-26 12:05:02,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:05:02,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 12:05:02,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:02,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 12:05:02,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-26 12:05:02,627 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:05:02,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:02,773 INFO L93 Difference]: Finished difference Result 63 states and 92 transitions. [2023-11-26 12:05:02,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 12:05:02,774 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-26 12:05:02,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:02,775 INFO L225 Difference]: With dead ends: 63 [2023-11-26 12:05:02,775 INFO L226 Difference]: Without dead ends: 42 [2023-11-26 12:05:02,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-26 12:05:02,778 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:02,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:05:02,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-26 12:05:02,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2023-11-26 12:05:02,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:05:02,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2023-11-26 12:05:02,790 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 22 [2023-11-26 12:05:02,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:02,791 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2023-11-26 12:05:02,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:05:02,792 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2023-11-26 12:05:02,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-26 12:05:02,793 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:02,794 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:02,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 12:05:03,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-26 12:05:03,001 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:05:03,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:03,002 INFO L85 PathProgramCache]: Analyzing trace with hash 2129804330, now seen corresponding path program 2 times [2023-11-26 12:05:03,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:03,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69252307] [2023-11-26 12:05:03,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:03,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:03,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:03,457 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-26 12:05:03,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:03,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69252307] [2023-11-26 12:05:03,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69252307] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:03,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426627497] [2023-11-26 12:05:03,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 12:05:03,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:03,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:03,468 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:05:03,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 12:05:03,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 12:05:03,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:05:03,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 12:05:03,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:05:03,673 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-26 12:05:03,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:05:03,754 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-26 12:05:03,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426627497] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:05:03,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:05:03,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-26 12:05:03,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387866359] [2023-11-26 12:05:03,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:05:03,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 12:05:03,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:03,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 12:05:03,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-26 12:05:03,761 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:05:04,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:04,027 INFO L93 Difference]: Finished difference Result 114 states and 161 transitions. [2023-11-26 12:05:04,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 12:05:04,028 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-26 12:05:04,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:04,029 INFO L225 Difference]: With dead ends: 114 [2023-11-26 12:05:04,030 INFO L226 Difference]: Without dead ends: 78 [2023-11-26 12:05:04,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-26 12:05:04,032 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:04,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:05:04,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-26 12:05:04,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2023-11-26 12:05:04,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.0909090909090908) internal successors, (84), 77 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:05:04,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2023-11-26 12:05:04,047 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 40 [2023-11-26 12:05:04,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:04,047 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2023-11-26 12:05:04,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:05:04,048 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2023-11-26 12:05:04,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-26 12:05:04,051 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:04,052 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:04,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 12:05:04,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:04,254 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:05:04,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:04,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1532688438, now seen corresponding path program 3 times [2023-11-26 12:05:04,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:04,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053272158] [2023-11-26 12:05:04,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:04,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:04,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:04,953 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-11-26 12:05:04,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:04,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053272158] [2023-11-26 12:05:04,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053272158] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:04,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495979596] [2023-11-26 12:05:04,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 12:05:04,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:04,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:04,957 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:05:04,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 12:05:13,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-26 12:05:13,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:05:13,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 12:05:13,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:05:13,806 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-11-26 12:05:13,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:05:14,129 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-11-26 12:05:14,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495979596] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:05:14,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:05:14,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 25 [2023-11-26 12:05:14,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45153997] [2023-11-26 12:05:14,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:05:14,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-26 12:05:14,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:14,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-26 12:05:14,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-26 12:05:14,135 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:05:14,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:14,739 INFO L93 Difference]: Finished difference Result 216 states and 299 transitions. [2023-11-26 12:05:14,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-26 12:05:14,740 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2023-11-26 12:05:14,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:14,742 INFO L225 Difference]: With dead ends: 216 [2023-11-26 12:05:14,742 INFO L226 Difference]: Without dead ends: 150 [2023-11-26 12:05:14,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-26 12:05:14,745 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:14,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 12:05:14,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-11-26 12:05:14,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2023-11-26 12:05:14,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0469798657718121) internal successors, (156), 149 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:05:14,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 156 transitions. [2023-11-26 12:05:14,770 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 156 transitions. Word has length 76 [2023-11-26 12:05:14,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:14,771 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 156 transitions. [2023-11-26 12:05:14,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:05:14,772 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 156 transitions. [2023-11-26 12:05:14,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-11-26 12:05:14,775 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:14,775 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:14,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 12:05:14,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:14,976 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:05:14,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:14,977 INFO L85 PathProgramCache]: Analyzing trace with hash -836983030, now seen corresponding path program 4 times [2023-11-26 12:05:14,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:14,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784318774] [2023-11-26 12:05:14,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:14,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:15,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:16,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2023-11-26 12:05:16,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:16,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784318774] [2023-11-26 12:05:16,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784318774] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:16,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97129181] [2023-11-26 12:05:16,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 12:05:16,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:16,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:16,672 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:05:16,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 12:05:17,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 12:05:17,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:05:17,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-26 12:05:17,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:05:17,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2023-11-26 12:05:17,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:05:18,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2023-11-26 12:05:18,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97129181] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:05:18,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:05:18,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-11-26 12:05:18,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639762627] [2023-11-26 12:05:18,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:05:18,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-26 12:05:18,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:18,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-26 12:05:18,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-11-26 12:05:18,180 INFO L87 Difference]: Start difference. First operand 150 states and 156 transitions. Second operand has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 48 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:05:19,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:19,530 INFO L93 Difference]: Finished difference Result 420 states and 575 transitions. [2023-11-26 12:05:19,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-26 12:05:19,531 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 48 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2023-11-26 12:05:19,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:19,533 INFO L225 Difference]: With dead ends: 420 [2023-11-26 12:05:19,533 INFO L226 Difference]: Without dead ends: 294 [2023-11-26 12:05:19,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-11-26 12:05:19,538 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 816 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 816 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:19,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [816 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-26 12:05:19,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2023-11-26 12:05:19,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2023-11-26 12:05:19,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 1.023890784982935) internal successors, (300), 293 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:05:19,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 300 transitions. [2023-11-26 12:05:19,576 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 300 transitions. Word has length 148 [2023-11-26 12:05:19,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:19,576 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 300 transitions. [2023-11-26 12:05:19,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 48 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:05:19,577 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 300 transitions. [2023-11-26 12:05:19,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2023-11-26 12:05:19,605 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:19,606 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:19,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 12:05:19,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:19,806 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:05:19,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:19,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1504445834, now seen corresponding path program 5 times [2023-11-26 12:05:19,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:19,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882467209] [2023-11-26 12:05:19,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:19,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:20,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:25,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6486 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 5405 trivial. 0 not checked. [2023-11-26 12:05:25,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:25,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882467209] [2023-11-26 12:05:25,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882467209] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:25,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79785909] [2023-11-26 12:05:25,815 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 12:05:25,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:25,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:25,817 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:05:25,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e6431-b1db-4c75-ad47-3d3eb67a3fb2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process