./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ifeqn3f.c --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_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/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_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn3f.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/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_aa0ea377-1790-4327-bd5d-4650dad178e6/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 a857b372cfe9289a49ef385694b13655c2cf51f01faafc79ddd271caed9dd0b5 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 20:21:41,384 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 20:21:41,460 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-28 20:21:41,465 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 20:21:41,466 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 20:21:41,490 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 20:21:41,491 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 20:21:41,491 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 20:21:41,492 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 20:21:41,492 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 20:21:41,493 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 20:21:41,493 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 20:21:41,494 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 20:21:41,495 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 20:21:41,495 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 20:21:41,496 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 20:21:41,496 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 20:21:41,497 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 20:21:41,497 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 20:21:41,498 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 20:21:41,498 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 20:21:41,500 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 20:21:41,501 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 20:21:41,501 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 20:21:41,502 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 20:21:41,502 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 20:21:41,502 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 20:21:41,503 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 20:21:41,503 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 20:21:41,503 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 20:21:41,504 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 20:21:41,504 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:21:41,505 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 20:21:41,505 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 20:21:41,505 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 20:21:41,506 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 20:21:41,506 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 20:21:41,507 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 20:21:41,507 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 20:21:41,507 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 20:21:41,508 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 20:21:41,508 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 20:21:41,508 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_aa0ea377-1790-4327-bd5d-4650dad178e6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a857b372cfe9289a49ef385694b13655c2cf51f01faafc79ddd271caed9dd0b5 [2023-11-28 20:21:41,736 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 20:21:41,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 20:21:41,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 20:21:41,760 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 20:21:41,760 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 20:21:41,761 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-fpi/ifeqn3f.c [2023-11-28 20:21:44,438 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 20:21:44,601 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 20:21:44,602 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/sv-benchmarks/c/array-fpi/ifeqn3f.c [2023-11-28 20:21:44,607 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/data/478e4e77c/fece93111a4e4fa69dc4c898261f9f72/FLAG3e9483bc3 [2023-11-28 20:21:44,618 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/data/478e4e77c/fece93111a4e4fa69dc4c898261f9f72 [2023-11-28 20:21:44,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 20:21:44,621 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 20:21:44,622 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 20:21:44,622 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 20:21:44,628 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 20:21:44,628 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:21:44" (1/1) ... [2023-11-28 20:21:44,629 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f8ef146 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:44, skipping insertion in model container [2023-11-28 20:21:44,629 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:21:44" (1/1) ... [2023-11-28 20:21:44,648 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 20:21:44,784 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_aa0ea377-1790-4327-bd5d-4650dad178e6/sv-benchmarks/c/array-fpi/ifeqn3f.c[590,603] [2023-11-28 20:21:44,805 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:21:44,815 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 20:21:44,828 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_aa0ea377-1790-4327-bd5d-4650dad178e6/sv-benchmarks/c/array-fpi/ifeqn3f.c[590,603] [2023-11-28 20:21:44,836 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:21:44,851 INFO L206 MainTranslator]: Completed translation [2023-11-28 20:21:44,852 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:44 WrapperNode [2023-11-28 20:21:44,852 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 20:21:44,853 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 20:21:44,853 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 20:21:44,854 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 20:21:44,861 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:44" (1/1) ... [2023-11-28 20:21:44,868 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:44" (1/1) ... [2023-11-28 20:21:44,889 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2023-11-28 20:21:44,889 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 20:21:44,890 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 20:21:44,890 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 20:21:44,890 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 20:21:44,901 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:44" (1/1) ... [2023-11-28 20:21:44,902 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:44" (1/1) ... [2023-11-28 20:21:44,904 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:44" (1/1) ... [2023-11-28 20:21:44,917 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 4, 4]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 4 writes are split as follows [0, 2, 2]. [2023-11-28 20:21:44,917 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:44" (1/1) ... [2023-11-28 20:21:44,918 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:44" (1/1) ... [2023-11-28 20:21:44,923 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:44" (1/1) ... [2023-11-28 20:21:44,926 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:44" (1/1) ... [2023-11-28 20:21:44,927 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:44" (1/1) ... [2023-11-28 20:21:44,928 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:44" (1/1) ... [2023-11-28 20:21:44,931 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 20:21:44,931 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 20:21:44,932 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 20:21:44,932 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 20:21:44,933 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:44" (1/1) ... [2023-11-28 20:21:44,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:21:44,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:44,960 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 20:21:44,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 20:21:44,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 20:21:44,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 20:21:44,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-28 20:21:44,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-28 20:21:44,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-28 20:21:44,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-28 20:21:44,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-28 20:21:44,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-28 20:21:44,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 20:21:44,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 20:21:44,998 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-28 20:21:44,998 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-28 20:21:44,998 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-28 20:21:45,094 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 20:21:45,096 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 20:21:45,239 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 20:21:45,256 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 20:21:45,256 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-28 20:21:45,256 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:21:45 BoogieIcfgContainer [2023-11-28 20:21:45,257 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 20:21:45,259 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 20:21:45,259 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 20:21:45,262 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 20:21:45,262 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:21:44" (1/3) ... [2023-11-28 20:21:45,263 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f319aef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:21:45, skipping insertion in model container [2023-11-28 20:21:45,263 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:44" (2/3) ... [2023-11-28 20:21:45,263 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f319aef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:21:45, skipping insertion in model container [2023-11-28 20:21:45,264 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:21:45" (3/3) ... [2023-11-28 20:21:45,265 INFO L112 eAbstractionObserver]: Analyzing ICFG ifeqn3f.c [2023-11-28 20:21:45,284 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 20:21:45,284 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-28 20:21:45,324 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 20:21:45,329 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;@df22ca9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 20:21:45,329 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-28 20:21:45,333 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 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) [2023-11-28 20:21:45,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-28 20:21:45,339 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:45,339 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:45,340 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:45,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:45,345 INFO L85 PathProgramCache]: Analyzing trace with hash 323884275, now seen corresponding path program 1 times [2023-11-28 20:21:45,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:45,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968896907] [2023-11-28 20:21:45,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:45,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:45,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:45,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:45,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968896907] [2023-11-28 20:21:45,475 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-28 20:21:45,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761726781] [2023-11-28 20:21:45,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:45,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:45,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:45,480 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:45,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 20:21:45,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:45,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-28 20:21:45,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:45,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:45,582 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:21:45,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761726781] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:45,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:45,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:21:45,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758925398] [2023-11-28 20:21:45,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:45,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-28 20:21:45,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:45,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-28 20:21:45,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 20:21:45,619 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 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) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:21:45,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:45,637 INFO L93 Difference]: Finished difference Result 37 states and 55 transitions. [2023-11-28 20:21:45,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-28 20:21:45,640 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-28 20:21:45,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:45,645 INFO L225 Difference]: With dead ends: 37 [2023-11-28 20:21:45,646 INFO L226 Difference]: Without dead ends: 17 [2023-11-28 20:21:45,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 20:21:45,651 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:45,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:21:45,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-28 20:21:45,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-28 20:21:45,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:21:45,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-11-28 20:21:45,678 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2023-11-28 20:21:45,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:45,678 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-11-28 20:21:45,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:21:45,679 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-11-28 20:21:45,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-28 20:21:45,679 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:45,679 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:45,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 20:21:45,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-28 20:21:45,880 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:45,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:45,881 INFO L85 PathProgramCache]: Analyzing trace with hash 993783914, now seen corresponding path program 1 times [2023-11-28 20:21:45,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:45,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477774765] [2023-11-28 20:21:45,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:45,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:45,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:45,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:45,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477774765] [2023-11-28 20:21:45,924 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-28 20:21:45,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813195625] [2023-11-28 20:21:45,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:45,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:45,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:45,926 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:45,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 20:21:45,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:45,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 20:21:45,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:46,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:46,043 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:21:46,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813195625] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:46,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:46,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:21:46,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972603220] [2023-11-28 20:21:46,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:46,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:21:46,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:46,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:21:46,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:21:46,046 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:21:46,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:46,100 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2023-11-28 20:21:46,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:21:46,101 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-28 20:21:46,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:46,102 INFO L225 Difference]: With dead ends: 38 [2023-11-28 20:21:46,102 INFO L226 Difference]: Without dead ends: 28 [2023-11-28 20:21:46,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:21:46,104 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:46,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 11 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:21:46,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-28 20:21:46,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2023-11-28 20:21:46,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:21:46,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-11-28 20:21:46,111 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2023-11-28 20:21:46,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:46,112 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-11-28 20:21:46,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:21:46,112 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-11-28 20:21:46,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-28 20:21:46,113 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:46,113 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:46,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-28 20:21:46,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:46,317 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:46,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:46,317 INFO L85 PathProgramCache]: Analyzing trace with hash 334138833, now seen corresponding path program 1 times [2023-11-28 20:21:46,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:46,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944926885] [2023-11-28 20:21:46,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:46,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:46,339 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:21:46,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1503091094] [2023-11-28 20:21:46,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:46,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:46,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:46,342 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:46,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 20:21:46,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:46,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-28 20:21:46,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:46,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-28 20:21:46,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:21:46,527 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:21:46,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:46,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944926885] [2023-11-28 20:21:46,528 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:21:46,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503091094] [2023-11-28 20:21:46,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503091094] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:46,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:46,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-28 20:21:46,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87297619] [2023-11-28 20:21:46,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:46,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:21:46,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:46,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:21:46,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:21:46,531 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:21:46,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:46,602 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2023-11-28 20:21:46,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:21:46,603 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-28 20:21:46,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:46,604 INFO L225 Difference]: With dead ends: 34 [2023-11-28 20:21:46,604 INFO L226 Difference]: Without dead ends: 32 [2023-11-28 20:21:46,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:21:46,606 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 21 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:46,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 55 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:21:46,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-28 20:21:46,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2023-11-28 20:21:46,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:21:46,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2023-11-28 20:21:46,627 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 17 [2023-11-28 20:21:46,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:46,627 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2023-11-28 20:21:46,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:21:46,627 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2023-11-28 20:21:46,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-28 20:21:46,628 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:46,628 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:46,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-28 20:21:46,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:46,832 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:46,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:46,833 INFO L85 PathProgramCache]: Analyzing trace with hash 2109146195, now seen corresponding path program 1 times [2023-11-28 20:21:46,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:46,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174218736] [2023-11-28 20:21:46,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:46,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:46,854 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:21:46,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1374866389] [2023-11-28 20:21:46,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:46,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:46,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:46,855 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:46,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 20:21:46,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:46,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 20:21:46,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:46,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:21:46,927 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:21:46,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:46,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174218736] [2023-11-28 20:21:46,928 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:21:46,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374866389] [2023-11-28 20:21:46,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374866389] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:46,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:46,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:21:46,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123660716] [2023-11-28 20:21:46,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:46,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:21:46,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:46,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:21:46,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:21:46,931 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:21:46,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:46,964 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2023-11-28 20:21:46,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:21:46,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-28 20:21:46,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:46,965 INFO L225 Difference]: With dead ends: 46 [2023-11-28 20:21:46,965 INFO L226 Difference]: Without dead ends: 26 [2023-11-28 20:21:46,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:21:46,967 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:46,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 17 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:21:46,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-28 20:21:46,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2023-11-28 20:21:46,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 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) [2023-11-28 20:21:46,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-11-28 20:21:46,974 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 17 [2023-11-28 20:21:46,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:46,974 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-11-28 20:21:46,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:21:46,974 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-11-28 20:21:46,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-28 20:21:46,975 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:46,975 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:46,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-28 20:21:47,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:47,180 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:47,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:47,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1399034495, now seen corresponding path program 1 times [2023-11-28 20:21:47,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:47,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894717884] [2023-11-28 20:21:47,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:47,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:47,198 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:21:47,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [229466783] [2023-11-28 20:21:47,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:47,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:47,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:47,200 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:47,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-28 20:21:47,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:47,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 20:21:47,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:47,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:21:47,334 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:21:47,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:21:47,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:47,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894717884] [2023-11-28 20:21:47,384 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:21:47,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229466783] [2023-11-28 20:21:47,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229466783] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:21:47,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:21:47,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-11-28 20:21:47,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810740916] [2023-11-28 20:21:47,384 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:21:47,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-28 20:21:47,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:47,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-28 20:21:47,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-28 20:21:47,386 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:21:47,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:47,505 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2023-11-28 20:21:47,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-28 20:21:47,506 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-28 20:21:47,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:47,507 INFO L225 Difference]: With dead ends: 59 [2023-11-28 20:21:47,507 INFO L226 Difference]: Without dead ends: 37 [2023-11-28 20:21:47,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-11-28 20:21:47,508 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 23 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:47,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 34 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:21:47,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-28 20:21:47,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 27. [2023-11-28 20:21:47,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:21:47,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2023-11-28 20:21:47,515 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 20 [2023-11-28 20:21:47,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:47,515 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2023-11-28 20:21:47,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:21:47,516 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2023-11-28 20:21:47,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-28 20:21:47,516 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:47,516 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:47,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-28 20:21:47,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:47,717 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:47,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:47,718 INFO L85 PathProgramCache]: Analyzing trace with hash 879178916, now seen corresponding path program 1 times [2023-11-28 20:21:47,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:47,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988551799] [2023-11-28 20:21:47,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:47,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:47,738 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:21:47,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626966918] [2023-11-28 20:21:47,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:47,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:47,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:47,740 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:47,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-28 20:21:47,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:47,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-28 20:21:47,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:47,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-28 20:21:47,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-28 20:21:48,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-28 20:21:48,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-28 20:21:48,308 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:48,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:21:48,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2023-11-28 20:21:48,499 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:21:48,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 55 [2023-11-28 20:21:48,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2023-11-28 20:21:48,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2023-11-28 20:21:48,649 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:48,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:48,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988551799] [2023-11-28 20:21:48,649 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:21:48,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626966918] [2023-11-28 20:21:48,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626966918] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:21:48,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:21:48,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2023-11-28 20:21:48,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553083907] [2023-11-28 20:21:48,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:21:48,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-28 20:21:48,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:48,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-28 20:21:48,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2023-11-28 20:21:48,652 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2023-11-28 20:21:49,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:49,109 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2023-11-28 20:21:49,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-28 20:21:49,109 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-28 20:21:49,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:49,110 INFO L225 Difference]: With dead ends: 62 [2023-11-28 20:21:49,110 INFO L226 Difference]: Without dead ends: 41 [2023-11-28 20:21:49,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2023-11-28 20:21:49,112 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 79 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:49,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 68 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:21:49,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-28 20:21:49,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2023-11-28 20:21:49,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:21:49,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2023-11-28 20:21:49,119 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 26 [2023-11-28 20:21:49,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:49,119 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2023-11-28 20:21:49,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2023-11-28 20:21:49,120 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2023-11-28 20:21:49,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-28 20:21:49,120 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:49,121 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:49,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-28 20:21:49,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:49,321 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:49,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:49,322 INFO L85 PathProgramCache]: Analyzing trace with hash 913699278, now seen corresponding path program 2 times [2023-11-28 20:21:49,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:49,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763386838] [2023-11-28 20:21:49,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:49,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:49,342 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:21:49,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [359019814] [2023-11-28 20:21:49,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:21:49,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:49,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:49,343 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:49,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-28 20:21:49,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:21:49,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:21:49,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 20:21:49,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:49,503 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 20:21:49,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:21:49,575 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 20:21:49,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:49,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763386838] [2023-11-28 20:21:49,576 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:21:49,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359019814] [2023-11-28 20:21:49,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359019814] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:21:49,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:21:49,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-11-28 20:21:49,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321890619] [2023-11-28 20:21:49,576 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:21:49,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-28 20:21:49,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:49,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-28 20:21:49,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-28 20:21:49,578 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:21:49,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:49,720 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2023-11-28 20:21:49,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-28 20:21:49,723 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 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 29 [2023-11-28 20:21:49,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:49,724 INFO L225 Difference]: With dead ends: 80 [2023-11-28 20:21:49,724 INFO L226 Difference]: Without dead ends: 46 [2023-11-28 20:21:49,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-11-28 20:21:49,725 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 57 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:49,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 35 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:21:49,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-28 20:21:49,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 36. [2023-11-28 20:21:49,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:21:49,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2023-11-28 20:21:49,733 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 29 [2023-11-28 20:21:49,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:49,733 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2023-11-28 20:21:49,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:21:49,733 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2023-11-28 20:21:49,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-28 20:21:49,734 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:49,734 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:49,739 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-28 20:21:49,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:49,939 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:49,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:49,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1445040975, now seen corresponding path program 3 times [2023-11-28 20:21:49,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:49,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387631736] [2023-11-28 20:21:49,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:49,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:49,959 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:21:49,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1349013573] [2023-11-28 20:21:49,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:21:49,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:49,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:49,961 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:49,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-28 20:21:50,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-28 20:21:50,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-11-28 20:21:50,075 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-28 20:21:50,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 20:21:50,131 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-28 20:21:50,131 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-28 20:21:50,132 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-28 20:21:50,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-28 20:21:50,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:50,342 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2023-11-28 20:21:50,345 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-28 20:21:50,372 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 08:21:50 BoogieIcfgContainer [2023-11-28 20:21:50,372 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-28 20:21:50,372 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-28 20:21:50,373 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-28 20:21:50,373 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-28 20:21:50,373 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:21:45" (3/4) ... [2023-11-28 20:21:50,374 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-28 20:21:50,415 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0ea377-1790-4327-bd5d-4650dad178e6/bin/uautomizer-verify-BQ2R08f2Ya/witness.graphml [2023-11-28 20:21:50,415 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-28 20:21:50,416 INFO L158 Benchmark]: Toolchain (without parser) took 5794.44ms. Allocated memory was 151.0MB in the beginning and 192.9MB in the end (delta: 41.9MB). Free memory was 112.9MB in the beginning and 101.0MB in the end (delta: 11.9MB). Peak memory consumption was 52.4MB. Max. memory is 16.1GB. [2023-11-28 20:21:50,416 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 100.7MB. Free memory is still 74.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-28 20:21:50,416 INFO L158 Benchmark]: CACSL2BoogieTranslator took 230.23ms. Allocated memory is still 151.0MB. Free memory was 112.9MB in the beginning and 101.6MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-28 20:21:50,417 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.92ms. Allocated memory is still 151.0MB. Free memory was 101.6MB in the beginning and 100.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-28 20:21:50,417 INFO L158 Benchmark]: Boogie Preprocessor took 41.00ms. Allocated memory is still 151.0MB. Free memory was 100.2MB in the beginning and 98.2MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-28 20:21:50,417 INFO L158 Benchmark]: RCFGBuilder took 325.27ms. Allocated memory is still 151.0MB. Free memory was 98.2MB in the beginning and 115.9MB in the end (delta: -17.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-28 20:21:50,418 INFO L158 Benchmark]: TraceAbstraction took 5113.33ms. Allocated memory was 151.0MB in the beginning and 192.9MB in the end (delta: 41.9MB). Free memory was 115.0MB in the beginning and 104.2MB in the end (delta: 10.8MB). Peak memory consumption was 54.4MB. Max. memory is 16.1GB. [2023-11-28 20:21:50,418 INFO L158 Benchmark]: Witness Printer took 42.59ms. Allocated memory is still 192.9MB. Free memory was 104.2MB in the beginning and 101.0MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-28 20:21:50,420 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 100.7MB. Free memory is still 74.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 230.23ms. Allocated memory is still 151.0MB. Free memory was 112.9MB in the beginning and 101.6MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.92ms. Allocated memory is still 151.0MB. Free memory was 101.6MB in the beginning and 100.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 41.00ms. Allocated memory is still 151.0MB. Free memory was 100.2MB in the beginning and 98.2MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 325.27ms. Allocated memory is still 151.0MB. Free memory was 98.2MB in the beginning and 115.9MB in the end (delta: -17.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 5113.33ms. Allocated memory was 151.0MB in the beginning and 192.9MB in the end (delta: 41.9MB). Free memory was 115.0MB in the beginning and 104.2MB in the end (delta: 10.8MB). Peak memory consumption was 54.4MB. Max. memory is 16.1GB. * Witness Printer took 42.59ms. Allocated memory is still 192.9MB. Free memory was 104.2MB in the beginning and 101.0MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) VAL [N=3, \old(cond)=1, cond=1] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] i=0 VAL [N=3, a={-1:0}, b={4:0}, i=0] [L31] COND TRUE i