./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ --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 8cecbb1437ef2a2416e9d468bf4de8fbbd7da1f76f2f86e847aa165ffb35626c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:29:31,854 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:29:31,936 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 22:29:31,943 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:29:31,944 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:29:31,971 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:29:31,972 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:29:31,973 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:29:31,974 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:29:31,974 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:29:31,975 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:29:31,976 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:29:31,977 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:29:31,977 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:29:31,978 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:29:31,979 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:29:31,979 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:29:31,980 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:29:31,981 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:29:31,981 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:29:31,982 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:29:31,983 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:29:31,984 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:29:31,984 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:29:31,985 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:29:31,986 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:29:31,986 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:29:31,987 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:29:31,987 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:29:31,988 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:29:31,989 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:29:31,989 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:29:31,990 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:29:31,990 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:29:31,991 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:29:31,991 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:29:31,992 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:29:31,992 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:29:31,993 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:29:31,993 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:29:31,994 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:29:31,994 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:29:31,994 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_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8cecbb1437ef2a2416e9d468bf4de8fbbd7da1f76f2f86e847aa165ffb35626c [2023-11-23 22:29:32,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:29:32,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:29:32,289 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:29:32,291 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:29:32,291 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:29:32,293 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound1.c [2023-11-23 22:29:35,713 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:29:35,963 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:29:35,963 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound1.c [2023-11-23 22:29:35,973 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/data/2fa1b8a11/fc44ae12b12d4149accf0416f39ea5d2/FLAGb7abe9033 [2023-11-23 22:29:35,989 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/data/2fa1b8a11/fc44ae12b12d4149accf0416f39ea5d2 [2023-11-23 22:29:35,992 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:29:35,994 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:29:35,996 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:29:35,996 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:29:36,002 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:29:36,003 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:29:35" (1/1) ... [2023-11-23 22:29:36,004 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fdffc0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:36, skipping insertion in model container [2023-11-23 22:29:36,005 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:29:35" (1/1) ... [2023-11-23 22:29:36,029 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:29:36,213 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_db4547a9-f1ff-4538-ab20-62c345b32ff9/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound1.c[1175,1188] [2023-11-23 22:29:36,232 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:29:36,242 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:29:36,255 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_db4547a9-f1ff-4538-ab20-62c345b32ff9/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound1.c[1175,1188] [2023-11-23 22:29:36,270 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:29:36,288 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:29:36,289 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:36 WrapperNode [2023-11-23 22:29:36,289 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:29:36,291 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:29:36,291 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:29:36,291 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:29:36,300 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:36" (1/1) ... [2023-11-23 22:29:36,312 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:36" (1/1) ... [2023-11-23 22:29:36,339 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 49 [2023-11-23 22:29:36,340 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:29:36,340 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:29:36,341 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:29:36,341 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:29:36,353 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:36" (1/1) ... [2023-11-23 22:29:36,354 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:36" (1/1) ... [2023-11-23 22:29:36,355 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:36" (1/1) ... [2023-11-23 22:29:36,366 INFO L189 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-23 22:29:36,367 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:36" (1/1) ... [2023-11-23 22:29:36,367 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:36" (1/1) ... [2023-11-23 22:29:36,376 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:36" (1/1) ... [2023-11-23 22:29:36,380 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:36" (1/1) ... [2023-11-23 22:29:36,381 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:36" (1/1) ... [2023-11-23 22:29:36,382 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:36" (1/1) ... [2023-11-23 22:29:36,384 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:29:36,386 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:29:36,393 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:29:36,393 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:29:36,394 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:36" (1/1) ... [2023-11-23 22:29:36,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:29:36,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:36,439 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:36,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:29:36,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:29:36,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:29:36,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:29:36,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:29:36,487 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 22:29:36,487 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 22:29:36,566 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:29:36,569 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:29:36,754 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:29:36,784 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:29:36,784 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 22:29:36,785 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:29:36 BoogieIcfgContainer [2023-11-23 22:29:36,785 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:29:36,788 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:29:36,788 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:29:36,792 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:29:36,792 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:29:35" (1/3) ... [2023-11-23 22:29:36,793 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6366d104 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:29:36, skipping insertion in model container [2023-11-23 22:29:36,794 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:36" (2/3) ... [2023-11-23 22:29:36,794 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6366d104 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:29:36, skipping insertion in model container [2023-11-23 22:29:36,794 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:29:36" (3/3) ... [2023-11-23 22:29:36,798 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound1.c [2023-11-23 22:29:36,818 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:29:36,818 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 22:29:36,870 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:29:36,878 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;@2dc7ed7c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:29:36,895 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 22:29:36,907 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 22:29:36,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-23 22:29:36,915 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:29:36,916 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:29:36,916 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:29:36,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:36,925 INFO L85 PathProgramCache]: Analyzing trace with hash -818250469, now seen corresponding path program 1 times [2023-11-23 22:29:36,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:36,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527320601] [2023-11-23 22:29:36,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:36,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:37,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:37,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:29:37,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527320601] [2023-11-23 22:29:37,078 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-23 22:29:37,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031416389] [2023-11-23 22:29:37,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:37,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:29:37,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:37,081 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:29:37,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:29:37,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:37,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-23 22:29:37,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:37,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:29:37,206 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:29:37,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031416389] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:29:37,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:29:37,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:29:37,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468313392] [2023-11-23 22:29:37,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:29:37,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 22:29:37,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:29:37,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 22:29:37,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 22:29:37,247 INFO L87 Difference]: Start difference. First operand has 18 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:29:37,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:29:37,274 INFO L93 Difference]: Finished difference Result 34 states and 47 transitions. [2023-11-23 22:29:37,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 22:29:37,277 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-23 22:29:37,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:29:37,282 INFO L225 Difference]: With dead ends: 34 [2023-11-23 22:29:37,283 INFO L226 Difference]: Without dead ends: 16 [2023-11-23 22:29:37,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 22:29:37,290 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:29:37,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:29:37,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-23 22:29:37,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-23 22:29:37,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 22:29:37,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2023-11-23 22:29:37,324 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 8 [2023-11-23 22:29:37,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:29:37,324 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2023-11-23 22:29:37,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:29:37,325 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2023-11-23 22:29:37,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 22:29:37,325 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:29:37,326 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:29:37,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 22:29:37,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-23 22:29:37,542 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:29:37,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:37,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1011676302, now seen corresponding path program 1 times [2023-11-23 22:29:37,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:37,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193898693] [2023-11-23 22:29:37,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:37,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:37,563 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:29:37,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [332691419] [2023-11-23 22:29:37,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:37,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:29:37,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:37,567 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:29:37,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:29:37,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:37,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 22:29:37,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:37,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:29:37,679 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:29:37,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:29:37,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193898693] [2023-11-23 22:29:37,680 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:29:37,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332691419] [2023-11-23 22:29:37,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332691419] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:29:37,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:29:37,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:29:37,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588230251] [2023-11-23 22:29:37,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:29:37,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:29:37,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:29:37,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:29:37,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:29:37,684 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:29:37,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:29:37,702 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2023-11-23 22:29:37,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:29:37,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-23 22:29:37,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:29:37,704 INFO L225 Difference]: With dead ends: 25 [2023-11-23 22:29:37,704 INFO L226 Difference]: Without dead ends: 18 [2023-11-23 22:29:37,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:29:37,706 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:29:37,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:29:37,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-23 22:29:37,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-23 22:29:37,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 22:29:37,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2023-11-23 22:29:37,712 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 9 [2023-11-23 22:29:37,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:29:37,713 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2023-11-23 22:29:37,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:29:37,713 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2023-11-23 22:29:37,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 22:29:37,714 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:29:37,714 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:29:37,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:37,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-23 22:29:37,930 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:29:37,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:37,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1009888842, now seen corresponding path program 1 times [2023-11-23 22:29:37,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:37,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622995461] [2023-11-23 22:29:37,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:37,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:37,947 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:29:37,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [369026796] [2023-11-23 22:29:37,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:37,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:29:37,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:37,950 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:29:37,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:29:38,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:38,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 22:29:38,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:38,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:29:38,127 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:29:38,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:29:38,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622995461] [2023-11-23 22:29:38,127 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:29:38,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369026796] [2023-11-23 22:29:38,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369026796] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:29:38,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:29:38,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:29:38,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835188726] [2023-11-23 22:29:38,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:29:38,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:29:38,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:29:38,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:29:38,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:29:38,130 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:29:38,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:29:38,230 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2023-11-23 22:29:38,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:29:38,230 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-23 22:29:38,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:29:38,234 INFO L225 Difference]: With dead ends: 29 [2023-11-23 22:29:38,234 INFO L226 Difference]: Without dead ends: 27 [2023-11-23 22:29:38,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:29:38,241 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:29:38,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 41 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:29:38,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-23 22:29:38,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2023-11-23 22:29:38,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 19 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 22:29:38,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-11-23 22:29:38,253 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 9 [2023-11-23 22:29:38,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:29:38,257 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-11-23 22:29:38,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:29:38,257 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-11-23 22:29:38,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 22:29:38,259 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:29:38,259 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:29:38,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:38,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:29:38,474 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:29:38,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:38,475 INFO L85 PathProgramCache]: Analyzing trace with hash 292477645, now seen corresponding path program 1 times [2023-11-23 22:29:38,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:38,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97211972] [2023-11-23 22:29:38,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:38,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:38,488 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:29:38,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [834693708] [2023-11-23 22:29:38,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:38,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:29:38,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:38,490 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:29:38,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 22:29:38,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:38,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 22:29:38,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:38,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:29:38,709 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:29:38,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:29:38,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:29:38,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97211972] [2023-11-23 22:29:38,914 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:29:38,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834693708] [2023-11-23 22:29:38,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834693708] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:29:38,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:29:38,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2023-11-23 22:29:38,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003348151] [2023-11-23 22:29:38,915 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:29:38,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 22:29:38,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:29:38,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 22:29:38,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-23 22:29:38,921 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 22:29:39,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:29:39,142 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2023-11-23 22:29:39,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 22:29:39,144 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-11-23 22:29:39,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:29:39,147 INFO L225 Difference]: With dead ends: 39 [2023-11-23 22:29:39,147 INFO L226 Difference]: Without dead ends: 31 [2023-11-23 22:29:39,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-11-23 22:29:39,156 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:29:39,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 101 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 22:29:39,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-23 22:29:39,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2023-11-23 22:29:39,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 22:29:39,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-11-23 22:29:39,180 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2023-11-23 22:29:39,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:29:39,180 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-11-23 22:29:39,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 22:29:39,181 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-11-23 22:29:39,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 22:29:39,182 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:29:39,182 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:29:39,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-23 22:29:39,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:29:39,383 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:29:39,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:39,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1083966870, now seen corresponding path program 1 times [2023-11-23 22:29:39,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:39,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732124685] [2023-11-23 22:29:39,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:39,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:39,397 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:29:39,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [110813894] [2023-11-23 22:29:39,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:39,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:29:39,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:39,399 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:29:39,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 22:29:39,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:29:39,460 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 22:29:39,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:29:39,626 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-23 22:29:39,627 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-23 22:29:39,628 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-23 22:29:39,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:39,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:29:39,833 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-23 22:29:39,836 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-23 22:29:39,850 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-23 22:29:39,857 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-23 22:29:39,865 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 10:29:39 BoogieIcfgContainer [2023-11-23 22:29:39,865 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-23 22:29:39,866 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-23 22:29:39,866 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-23 22:29:39,866 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-23 22:29:39,867 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:29:36" (3/4) ... [2023-11-23 22:29:39,868 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-23 22:29:39,883 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-23 22:29:39,884 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-23 22:29:39,942 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/witness.graphml [2023-11-23 22:29:39,942 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-23 22:29:39,943 INFO L158 Benchmark]: Toolchain (without parser) took 3949.28ms. Allocated memory is still 146.8MB. Free memory was 105.8MB in the beginning and 94.2MB in the end (delta: 11.6MB). Peak memory consumption was 14.3MB. Max. memory is 16.1GB. [2023-11-23 22:29:39,944 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 107.0MB. Free memory was 56.6MB in the beginning and 56.4MB in the end (delta: 134.3kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 22:29:39,944 INFO L158 Benchmark]: CACSL2BoogieTranslator took 294.18ms. Allocated memory is still 146.8MB. Free memory was 105.4MB in the beginning and 94.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-23 22:29:39,944 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.25ms. Allocated memory is still 146.8MB. Free memory was 94.9MB in the beginning and 93.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 22:29:39,945 INFO L158 Benchmark]: Boogie Preprocessor took 43.87ms. Allocated memory is still 146.8MB. Free memory was 93.4MB in the beginning and 91.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 22:29:39,945 INFO L158 Benchmark]: RCFGBuilder took 399.35ms. Allocated memory is still 146.8MB. Free memory was 91.7MB in the beginning and 80.9MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-23 22:29:39,946 INFO L158 Benchmark]: TraceAbstraction took 3077.50ms. Allocated memory is still 146.8MB. Free memory was 80.3MB in the beginning and 96.2MB in the end (delta: -15.9MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 22:29:39,946 INFO L158 Benchmark]: Witness Printer took 76.31ms. Allocated memory is still 146.8MB. Free memory was 96.2MB in the beginning and 94.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 22:29:39,950 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 107.0MB. Free memory was 56.6MB in the beginning and 56.4MB in the end (delta: 134.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 294.18ms. Allocated memory is still 146.8MB. Free memory was 105.4MB in the beginning and 94.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.25ms. Allocated memory is still 146.8MB. Free memory was 94.9MB in the beginning and 93.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 43.87ms. Allocated memory is still 146.8MB. Free memory was 93.4MB in the beginning and 91.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 399.35ms. Allocated memory is still 146.8MB. Free memory was 91.7MB in the beginning and 80.9MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 3077.50ms. Allocated memory is still 146.8MB. Free memory was 80.3MB in the beginning and 96.2MB in the end (delta: -15.9MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 76.31ms. Allocated memory is still 146.8MB. Free memory was 96.2MB in the beginning and 94.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * 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: 23]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L28] int counter = 0; [L30] int a, b; [L31] long long x, y, z; [L33] a = __VERIFIER_nondet_int() [L34] b = __VERIFIER_nondet_int() [L35] CALL assume_abort_if_not(b >= 1) [L18] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L35] RET assume_abort_if_not(b >= 1) [L37] x = a [L38] y = b [L39] z = 0 VAL [a=-2, b=3, counter=0, x=-2, y=3, z=0] [L41] EXPR counter++ VAL [a=-2, b=3, counter=1, x=-2, y=3, z=0] [L41] COND TRUE counter++<1 [L42] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, counter=1] [L21] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L42] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [a=-2, b=3, counter=1, x=-2, y=3, z=0] [L43] COND FALSE !(!(y != 0)) VAL [a=-2, b=3, counter=1, x=-2, y=3, z=0] [L46] COND TRUE y % 2 == 1 [L47] z = z + x [L48] y = y - 1 VAL [a=-2, b=3, counter=1, x=-2, y=2, z=-2] [L50] x = 2 * x [L51] y = y / 2 VAL [a=-2, b=3, counter=1, x=-4, y=1, z=-2] [L41] EXPR counter++ VAL [a=-2, b=3, counter=2, x=-4, y=1, z=-2] [L41] COND FALSE !(counter++<1) [L53] CALL __VERIFIER_assert(z == (long long) a * b) VAL [\old(cond)=0, counter=2] [L21] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=2] [L23] reach_error() VAL [\old(cond)=0, cond=0, counter=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.0s, OverallIterations: 5, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 29 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 28 mSDsluCounter, 206 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 147 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 148 IncrementalHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 59 mSDtfsCounter, 148 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=3, InterpolantAutomatonStates: 22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 12 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 68 NumberOfCodeBlocks, 68 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 51 ConstructedInterpolants, 1 QuantifiedInterpolants, 157 SizeOfPredicates, 5 NumberOfNonLiveVariables, 215 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 2/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-11-23 22:29:39,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4547a9-f1ff-4538-ab20-62c345b32ff9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE