./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_lcm2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/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_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_lcm2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/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_1bb7f206-cb95-4003-8b09-840752b2afe9/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 d93bd48e791c000b7768d0e055259ea6d087a487fbdd17b18765993d4c240b84 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 03:38:36,299 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 03:38:36,375 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 03:38:36,380 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 03:38:36,380 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 03:38:36,404 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 03:38:36,404 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 03:38:36,405 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 03:38:36,405 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 03:38:36,406 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 03:38:36,406 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 03:38:36,407 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 03:38:36,408 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 03:38:36,408 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 03:38:36,409 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 03:38:36,409 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 03:38:36,410 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 03:38:36,410 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 03:38:36,411 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 03:38:36,411 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 03:38:36,412 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 03:38:36,413 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 03:38:36,413 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 03:38:36,414 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 03:38:36,414 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 03:38:36,414 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 03:38:36,415 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 03:38:36,415 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 03:38:36,416 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 03:38:36,416 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 03:38:36,417 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 03:38:36,417 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:38:36,417 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 03:38:36,418 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 03:38:36,418 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 03:38:36,418 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 03:38:36,418 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 03:38:36,418 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 03:38:36,419 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 03:38:36,419 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 03:38:36,419 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 03:38:36,419 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 03:38:36,419 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_1bb7f206-cb95-4003-8b09-840752b2afe9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d93bd48e791c000b7768d0e055259ea6d087a487fbdd17b18765993d4c240b84 [2023-11-29 03:38:36,626 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 03:38:36,647 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 03:38:36,649 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 03:38:36,650 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 03:38:36,651 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 03:38:36,652 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/recursified_nla-digbench/recursified_lcm2.c [2023-11-29 03:38:39,436 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 03:38:39,641 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 03:38:39,642 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/sv-benchmarks/c/recursified_nla-digbench/recursified_lcm2.c [2023-11-29 03:38:39,650 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/data/595c96e9c/c7084db5884843f895d1e7cbfafd7ef1/FLAGca35cc67b [2023-11-29 03:38:39,665 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/data/595c96e9c/c7084db5884843f895d1e7cbfafd7ef1 [2023-11-29 03:38:39,667 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 03:38:39,669 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 03:38:39,670 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 03:38:39,670 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 03:38:39,675 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 03:38:39,676 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:38:39" (1/1) ... [2023-11-29 03:38:39,677 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1edda7de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:38:39, skipping insertion in model container [2023-11-29 03:38:39,678 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:38:39" (1/1) ... [2023-11-29 03:38:39,700 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 03:38:39,836 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_1bb7f206-cb95-4003-8b09-840752b2afe9/sv-benchmarks/c/recursified_nla-digbench/recursified_lcm2.c[1061,1074] [2023-11-29 03:38:39,857 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:38:39,869 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 03:38:39,882 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_1bb7f206-cb95-4003-8b09-840752b2afe9/sv-benchmarks/c/recursified_nla-digbench/recursified_lcm2.c[1061,1074] [2023-11-29 03:38:39,895 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:38:39,909 INFO L206 MainTranslator]: Completed translation [2023-11-29 03:38:39,909 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:38:39 WrapperNode [2023-11-29 03:38:39,909 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 03:38:39,910 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 03:38:39,911 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 03:38:39,911 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 03:38:39,917 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:38:39" (1/1) ... [2023-11-29 03:38:39,925 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:38:39" (1/1) ... [2023-11-29 03:38:39,945 INFO L138 Inliner]: procedures = 16, calls = 82, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 92 [2023-11-29 03:38:39,945 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 03:38:39,946 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 03:38:39,946 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 03:38:39,946 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 03:38:39,956 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:38:39" (1/1) ... [2023-11-29 03:38:39,956 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:38:39" (1/1) ... [2023-11-29 03:38:39,960 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:38:39" (1/1) ... [2023-11-29 03:38:39,980 INFO L175 MemorySlicer]: Split 51 memory accesses to 8 slices as follows [2, 7, 6, 6, 7, 7, 8, 8]. 16 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0, 0, 0, 0, 0, 0]. The 10 writes are split as follows [0, 0, 2, 2, 1, 1, 2, 2]. [2023-11-29 03:38:39,980 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:38:39" (1/1) ... [2023-11-29 03:38:39,980 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:38:39" (1/1) ... [2023-11-29 03:38:39,988 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:38:39" (1/1) ... [2023-11-29 03:38:39,990 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:38:39" (1/1) ... [2023-11-29 03:38:39,993 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:38:39" (1/1) ... [2023-11-29 03:38:39,995 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:38:39" (1/1) ... [2023-11-29 03:38:39,999 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 03:38:40,000 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 03:38:40,000 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 03:38:40,000 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 03:38:40,001 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:38:39" (1/1) ... [2023-11-29 03:38:40,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:38:40,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:38:40,029 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 03:38:40,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 03:38:40,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 03:38:40,064 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 03:38:40,064 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 03:38:40,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 03:38:40,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 03:38:40,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 03:38:40,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 03:38:40,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 03:38:40,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-29 03:38:40,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-29 03:38:40,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2023-11-29 03:38:40,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 03:38:40,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 03:38:40,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 03:38:40,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 03:38:40,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 03:38:40,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 03:38:40,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-29 03:38:40,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-11-29 03:38:40,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2023-11-29 03:38:40,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 03:38:40,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 03:38:40,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 03:38:40,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 03:38:40,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 03:38:40,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 03:38:40,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 03:38:40,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-29 03:38:40,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-11-29 03:38:40,071 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2023-11-29 03:38:40,071 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-29 03:38:40,071 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-29 03:38:40,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 03:38:40,072 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_35_to_46_0 [2023-11-29 03:38:40,072 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_35_to_46_0 [2023-11-29 03:38:40,184 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 03:38:40,186 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 03:38:40,396 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 03:38:40,429 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 03:38:40,429 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 03:38:40,430 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:38:40 BoogieIcfgContainer [2023-11-29 03:38:40,430 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 03:38:40,433 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 03:38:40,433 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 03:38:40,436 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 03:38:40,436 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 03:38:39" (1/3) ... [2023-11-29 03:38:40,437 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47aee55f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:38:40, skipping insertion in model container [2023-11-29 03:38:40,437 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:38:39" (2/3) ... [2023-11-29 03:38:40,437 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47aee55f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:38:40, skipping insertion in model container [2023-11-29 03:38:40,437 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:38:40" (3/3) ... [2023-11-29 03:38:40,438 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_lcm2.c [2023-11-29 03:38:40,454 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 03:38:40,454 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 03:38:40,497 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 03:38:40,504 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;@4b4cda5f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 03:38:40,504 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 03:38:40,508 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 03:38:40,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-29 03:38:40,515 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:38:40,515 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:38:40,516 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:38:40,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:38:40,521 INFO L85 PathProgramCache]: Analyzing trace with hash 897324978, now seen corresponding path program 1 times [2023-11-29 03:38:40,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:38:40,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158082118] [2023-11-29 03:38:40,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:38:40,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:38:40,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:40,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:38:40,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158082118] [2023-11-29 03:38:40,743 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 03:38:40,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493099859] [2023-11-29 03:38:40,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:38:40,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:38:40,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:38:40,751 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:38:40,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 03:38:40,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:40,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 03:38:40,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:38:40,958 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 03:38:40,959 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:38:40,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493099859] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:38:40,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:38:40,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:38:40,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915166957] [2023-11-29 03:38:40,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:38:40,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 03:38:40,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:38:40,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 03:38:40,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 03:38:40,995 INFO L87 Difference]: Start difference. First operand has 33 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 03:38:41,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:38:41,026 INFO L93 Difference]: Finished difference Result 64 states and 89 transitions. [2023-11-29 03:38:41,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 03:38:41,029 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-11-29 03:38:41,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:38:41,037 INFO L225 Difference]: With dead ends: 64 [2023-11-29 03:38:41,037 INFO L226 Difference]: Without dead ends: 31 [2023-11-29 03:38:41,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 03:38:41,045 INFO L413 NwaCegarLoop]: 37 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, 37 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 [2023-11-29 03:38:41,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:38:41,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-29 03:38:41,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-11-29 03:38:41,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 03:38:41,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2023-11-29 03:38:41,087 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 32 [2023-11-29 03:38:41,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:38:41,088 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2023-11-29 03:38:41,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 03:38:41,088 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2023-11-29 03:38:41,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-29 03:38:41,090 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:38:41,091 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:38:41,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 03:38:41,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 03:38:41,292 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:38:41,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:38:41,293 INFO L85 PathProgramCache]: Analyzing trace with hash -409193286, now seen corresponding path program 1 times [2023-11-29 03:38:41,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:38:41,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423140671] [2023-11-29 03:38:41,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:38:41,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:38:41,347 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:38:41,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [183115539] [2023-11-29 03:38:41,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:38:41,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:38:41,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:38:41,349 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:38:41,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 03:38:41,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:41,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 109 conjunts are in the unsatisfiable core [2023-11-29 03:38:41,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:38:41,630 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 15 treesize of output 1 [2023-11-29 03:38:41,636 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 15 treesize of output 1 [2023-11-29 03:38:41,930 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 15 treesize of output 11 [2023-11-29 03:38:41,946 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 15 treesize of output 11 [2023-11-29 03:38:41,956 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 15 treesize of output 11 [2023-11-29 03:38:41,969 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 15 treesize of output 11 [2023-11-29 03:38:42,315 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 19 treesize of output 11 [2023-11-29 03:38:42,324 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 19 treesize of output 11 [2023-11-29 03:38:42,329 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 22 treesize of output 10 [2023-11-29 03:38:42,339 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 19 treesize of output 11 [2023-11-29 03:38:42,347 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 19 treesize of output 11 [2023-11-29 03:38:42,352 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 22 treesize of output 10 [2023-11-29 03:38:42,412 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 03:38:42,412 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:38:42,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:38:42,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423140671] [2023-11-29 03:38:42,413 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:38:42,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183115539] [2023-11-29 03:38:42,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183115539] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:38:42,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:38:42,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 03:38:42,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15084012] [2023-11-29 03:38:42,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:38:42,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 03:38:42,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:38:42,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 03:38:42,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-11-29 03:38:42,417 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 03:38:43,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:38:43,027 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2023-11-29 03:38:43,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 03:38:43,028 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2023-11-29 03:38:43,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:38:43,030 INFO L225 Difference]: With dead ends: 47 [2023-11-29 03:38:43,030 INFO L226 Difference]: Without dead ends: 45 [2023-11-29 03:38:43,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-11-29 03:38:43,033 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 20 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:38:43,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 139 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 03:38:43,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-29 03:38:43,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2023-11-29 03:38:43,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 29 states have internal predecessors, (31), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-11-29 03:38:43,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2023-11-29 03:38:43,049 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 32 [2023-11-29 03:38:43,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:38:43,050 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2023-11-29 03:38:43,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 03:38:43,050 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2023-11-29 03:38:43,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-29 03:38:43,052 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:38:43,052 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:38:43,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 03:38:43,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:38:43,253 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:38:43,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:38:43,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1459834226, now seen corresponding path program 1 times [2023-11-29 03:38:43,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:38:43,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820523849] [2023-11-29 03:38:43,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:38:43,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:38:43,306 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:38:43,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [759689320] [2023-11-29 03:38:43,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:38:43,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:38:43,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:38:43,308 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:38:43,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 03:38:44,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:44,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 97 conjunts are in the unsatisfiable core [2023-11-29 03:38:44,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:38:44,573 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 15 treesize of output 1 [2023-11-29 03:38:44,580 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 15 treesize of output 1 [2023-11-29 03:38:44,673 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 15 treesize of output 11 [2023-11-29 03:38:44,684 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 15 treesize of output 11 [2023-11-29 03:38:44,694 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 15 treesize of output 11 [2023-11-29 03:38:44,706 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 15 treesize of output 11 [2023-11-29 03:38:44,752 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 11 treesize of output 7 [2023-11-29 03:38:44,757 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 11 treesize of output 7 [2023-11-29 03:38:44,763 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 11 treesize of output 7 [2023-11-29 03:38:44,768 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 11 treesize of output 7 [2023-11-29 03:38:57,226 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 19 treesize of output 11 [2023-11-29 03:38:57,231 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 26 treesize of output 14 [2023-11-29 03:38:57,235 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 15 treesize of output 7 [2023-11-29 03:38:57,248 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 19 treesize of output 11 [2023-11-29 03:38:57,254 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 19 treesize of output 11 [2023-11-29 03:38:57,258 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 22 treesize of output 10 [2023-11-29 03:38:57,312 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 03:38:57,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:39:24,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:39:24,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820523849] [2023-11-29 03:39:24,278 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:39:24,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759689320] [2023-11-29 03:39:24,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759689320] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:39:24,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 03:39:24,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-11-29 03:39:24,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618369209] [2023-11-29 03:39:24,279 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 03:39:24,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 03:39:24,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:39:24,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 03:39:24,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=224, Unknown=7, NotChecked=0, Total=272 [2023-11-29 03:39:24,281 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 13 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 03:39:28,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 03:39:32,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 03:39:36,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 03:39:40,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 03:39:44,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 03:39:48,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 03:39:52,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 03:39:57,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 03:40:01,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 03:40:09,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 03:40:17,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 03:40:21,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 03:40:25,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 03:40:30,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 03:40:38,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 03:40:54,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 03:41:02,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 03:41:06,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 03:41:10,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 03:41:14,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 03:41:18,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 03:41:22,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 03:41:22,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:41:22,318 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2023-11-29 03:41:22,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 03:41:22,334 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2023-11-29 03:41:22,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:41:22,337 INFO L225 Difference]: With dead ends: 52 [2023-11-29 03:41:22,337 INFO L226 Difference]: Without dead ends: 42 [2023-11-29 03:41:22,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 68.1s TimeCoverageRelationStatistics Valid=94, Invalid=492, Unknown=14, NotChecked=0, Total=600 [2023-11-29 03:41:22,339 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 30 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 15 mSolverCounterUnsat, 22 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 88.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 22 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 88.7s IncrementalHoareTripleChecker+Time [2023-11-29 03:41:22,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 71 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 247 Invalid, 22 Unknown, 0 Unchecked, 88.7s Time] [2023-11-29 03:41:22,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-29 03:41:22,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2023-11-29 03:41:22,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 28 states have internal predecessors, (30), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-11-29 03:41:22,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2023-11-29 03:41:22,350 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 42 [2023-11-29 03:41:22,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:41:22,350 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2023-11-29 03:41:22,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 03:41:22,351 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2023-11-29 03:41:22,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 03:41:22,352 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:41:22,352 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:41:22,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 03:41:22,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:41:22,553 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:41:22,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:41:22,553 INFO L85 PathProgramCache]: Analyzing trace with hash 44848769, now seen corresponding path program 1 times [2023-11-29 03:41:22,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:41:22,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456620158] [2023-11-29 03:41:22,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:41:22,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:41:22,586 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:41:22,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [224851210] [2023-11-29 03:41:22,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:41:22,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:41:22,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:41:22,588 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:41:22,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 03:41:22,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2023-11-29 03:41:22,887 WARN L124 FreeRefinementEngine]: Strategy CAMEL was unsuccessful and could not determine trace feasibility [2023-11-29 03:41:22,887 INFO L360 BasicCegarLoop]: Counterexample might be feasible [2023-11-29 03:41:22,893 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-29 03:41:22,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 03:41:23,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:41:23,097 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-29 03:41:23,099 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-29 03:41:23,112 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 03:41:23 BoogieIcfgContainer [2023-11-29 03:41:23,112 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-29 03:41:23,113 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-29 03:41:23,113 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-29 03:41:23,113 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-29 03:41:23,113 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:38:40" (3/4) ... [2023-11-29 03:41:23,115 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-29 03:41:23,116 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-29 03:41:23,116 INFO L158 Benchmark]: Toolchain (without parser) took 163447.63ms. Allocated memory was 142.6MB in the beginning and 172.0MB in the end (delta: 29.4MB). Free memory was 113.6MB in the beginning and 53.6MB in the end (delta: 59.9MB). Peak memory consumption was 91.9MB. Max. memory is 16.1GB. [2023-11-29 03:41:23,116 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 109.1MB. Free memory is still 67.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 03:41:23,117 INFO L158 Benchmark]: CACSL2BoogieTranslator took 239.65ms. Allocated memory is still 142.6MB. Free memory was 113.6MB in the beginning and 102.0MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-29 03:41:23,117 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.16ms. Allocated memory is still 142.6MB. Free memory was 102.0MB in the beginning and 100.6MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 03:41:23,117 INFO L158 Benchmark]: Boogie Preprocessor took 53.10ms. Allocated memory is still 142.6MB. Free memory was 100.6MB in the beginning and 97.9MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-29 03:41:23,117 INFO L158 Benchmark]: RCFGBuilder took 429.84ms. Allocated memory is still 142.6MB. Free memory was 97.9MB in the beginning and 79.0MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-11-29 03:41:23,117 INFO L158 Benchmark]: TraceAbstraction took 162679.90ms. Allocated memory was 142.6MB in the beginning and 172.0MB in the end (delta: 29.4MB). Free memory was 78.5MB in the beginning and 54.7MB in the end (delta: 23.8MB). Peak memory consumption was 54.1MB. Max. memory is 16.1GB. [2023-11-29 03:41:23,118 INFO L158 Benchmark]: Witness Printer took 2.85ms. Allocated memory is still 172.0MB. Free memory was 54.7MB in the beginning and 53.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 03:41:23,119 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 109.1MB. Free memory is still 67.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 239.65ms. Allocated memory is still 142.6MB. Free memory was 113.6MB in the beginning and 102.0MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.16ms. Allocated memory is still 142.6MB. Free memory was 102.0MB in the beginning and 100.6MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 53.10ms. Allocated memory is still 142.6MB. Free memory was 100.6MB in the beginning and 97.9MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 429.84ms. Allocated memory is still 142.6MB. Free memory was 97.9MB in the beginning and 79.0MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 162679.90ms. Allocated memory was 142.6MB in the beginning and 172.0MB in the end (delta: 29.4MB). Free memory was 78.5MB in the beginning and 54.7MB in the end (delta: 23.8MB). Peak memory consumption was 54.1MB. Max. memory is 16.1GB. * Witness Printer took 2.85ms. Allocated memory is still 172.0MB. Free memory was 54.7MB in the beginning and 53.6MB in the end (delta: 1.1MB). 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 - UnprovableResult [Line: 38]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L81] unsigned a; [L82] unsigned b; [L83] unsigned x; [L84] unsigned y; [L85] unsigned u; [L86] unsigned v; [L87] a = __VERIFIER_nondet_uint() [L88] b = __VERIFIER_nondet_uint() [L89] EXPR \read(a) [L89] CALL assume_abort_if_not(a >= 1) [L23] COND FALSE !(!cond) [L89] RET assume_abort_if_not(a >= 1) [L90] EXPR \read(b) [L90] CALL assume_abort_if_not(b >= 1) [L23] COND FALSE !(!cond) [L90] RET assume_abort_if_not(b >= 1) [L91] EXPR \read(a) [L91] CALL assume_abort_if_not(a <= 65535) [L23] COND FALSE !(!cond) [L91] RET assume_abort_if_not(a <= 65535) [L92] EXPR \read(b) [L92] CALL assume_abort_if_not(b <= 65535) [L23] COND FALSE !(!cond) [L92] RET assume_abort_if_not(b <= 65535) [L93] EXPR \read(a) [L93] x = a [L94] EXPR \read(b) [L94] y = b [L95] EXPR \read(b) [L95] u = b [L96] EXPR \read(a) [L96] v = a [L97] CALL func_to_recursive_line_35_to_46_0(&b, &y, &u, &v, &x, &a) [L53] EXPR \read(*x) [L53] EXPR \read(*u) [L53] EXPR \read(*y) [L53] EXPR \read(*v) [L53] EXPR \read(*a) [L53] EXPR \read(*b) [L53] CALL __VERIFIER_assert((((*x) * (*u)) + ((*y) * (*v))) == ((2 * (*a)) * (*b))) [L34] COND FALSE !(!cond) [L53] RET __VERIFIER_assert((((*x) * (*u)) + ((*y) * (*v))) == ((2 * (*a)) * (*b))) [L54] EXPR \read(*x) [L54] EXPR \read(*y) [L54] COND FALSE !(!((*x) != (*y))) [L61] EXPR \read(*x) [L61] EXPR \read(*y) [L61] COND TRUE (*x) > (*y) [L63] EXPR \read(*x) [L63] EXPR \read(*y) [L63] *x = (*x) - (*y) [L64] EXPR \read(*v) [L64] EXPR \read(*u) [L64] *v = (*v) + (*u) [L72] CALL func_to_recursive_line_35_to_46_0(b, y, u, v, x, a) [L53] EXPR \read(*x) [L53] EXPR \read(*u) [L53] EXPR \read(*y) [L53] EXPR \read(*v) [L53] EXPR \read(*a) [L53] EXPR \read(*b) [L53] CALL __VERIFIER_assert((((*x) * (*u)) + ((*y) * (*v))) == ((2 * (*a)) * (*b))) [L34] COND TRUE !cond [L38] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 162.6s, OverallIterations: 4, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 118.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 22 mSolverCounterUnknown, 50 SdHoareTripleChecker+Valid, 89.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 50 mSDsluCounter, 247 SdHoareTripleChecker+Invalid, 88.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 180 mSDsCounter, 20 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 462 IncrementalHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 20 mSolverCounterUnsat, 67 mSDtfsCounter, 462 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 121 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 68.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=2, InterpolantAutomatonStates: 28, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 40.7s InterpolantComputationTime, 181 NumberOfCodeBlocks, 181 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 103 ConstructedInterpolants, 4 QuantifiedInterpolants, 961 SizeOfPredicates, 71 NumberOfNonLiveVariables, 755 ConjunctsInSsa, 207 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 73/74 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 could not prove your program: unable to determine feasibility of some traces [2023-11-29 03:41:23,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/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_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_lcm2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/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 d93bd48e791c000b7768d0e055259ea6d087a487fbdd17b18765993d4c240b84 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 03:41:25,152 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 03:41:25,222 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-11-29 03:41:25,235 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 03:41:25,236 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 03:41:25,266 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 03:41:25,267 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 03:41:25,267 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 03:41:25,268 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 03:41:25,269 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 03:41:25,269 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 03:41:25,270 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 03:41:25,271 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 03:41:25,271 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 03:41:25,272 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 03:41:25,273 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 03:41:25,273 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 03:41:25,274 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 03:41:25,275 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 03:41:25,275 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 03:41:25,276 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 03:41:25,276 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 03:41:25,277 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 03:41:25,277 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 03:41:25,278 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-29 03:41:25,278 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-29 03:41:25,279 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 03:41:25,279 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 03:41:25,279 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 03:41:25,280 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 03:41:25,280 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 03:41:25,281 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 03:41:25,281 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 03:41:25,282 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:41:25,282 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 03:41:25,282 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 03:41:25,282 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 03:41:25,283 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-29 03:41:25,283 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-29 03:41:25,283 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 03:41:25,283 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 03:41:25,284 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 03:41:25,284 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 03:41:25,284 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 03:41:25,284 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-29 03:41:25,285 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_1bb7f206-cb95-4003-8b09-840752b2afe9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d93bd48e791c000b7768d0e055259ea6d087a487fbdd17b18765993d4c240b84 [2023-11-29 03:41:25,574 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 03:41:25,596 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 03:41:25,599 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 03:41:25,600 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 03:41:25,600 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 03:41:25,602 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/recursified_nla-digbench/recursified_lcm2.c [2023-11-29 03:41:28,470 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 03:41:28,648 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 03:41:28,649 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/sv-benchmarks/c/recursified_nla-digbench/recursified_lcm2.c [2023-11-29 03:41:28,658 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/data/d7fcb7956/b63509911ec24021b853356b6ca95030/FLAGaf08728fd [2023-11-29 03:41:28,673 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/data/d7fcb7956/b63509911ec24021b853356b6ca95030 [2023-11-29 03:41:28,676 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 03:41:28,678 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 03:41:28,680 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 03:41:28,680 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 03:41:28,685 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 03:41:28,686 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:41:28" (1/1) ... [2023-11-29 03:41:28,687 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@272b8042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:28, skipping insertion in model container [2023-11-29 03:41:28,687 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:41:28" (1/1) ... [2023-11-29 03:41:28,710 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 03:41:28,852 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_1bb7f206-cb95-4003-8b09-840752b2afe9/sv-benchmarks/c/recursified_nla-digbench/recursified_lcm2.c[1061,1074] [2023-11-29 03:41:28,874 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:41:28,891 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 03:41:28,905 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_1bb7f206-cb95-4003-8b09-840752b2afe9/sv-benchmarks/c/recursified_nla-digbench/recursified_lcm2.c[1061,1074] [2023-11-29 03:41:28,919 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:41:28,939 INFO L206 MainTranslator]: Completed translation [2023-11-29 03:41:28,939 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:28 WrapperNode [2023-11-29 03:41:28,939 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 03:41:28,941 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 03:41:28,941 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 03:41:28,941 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 03:41:28,948 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:28" (1/1) ... [2023-11-29 03:41:28,958 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:28" (1/1) ... [2023-11-29 03:41:28,980 INFO L138 Inliner]: procedures = 18, calls = 82, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 92 [2023-11-29 03:41:28,980 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 03:41:28,981 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 03:41:28,982 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 03:41:28,982 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 03:41:28,991 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:28" (1/1) ... [2023-11-29 03:41:28,992 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:28" (1/1) ... [2023-11-29 03:41:28,997 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:28" (1/1) ... [2023-11-29 03:41:29,017 INFO L175 MemorySlicer]: Split 51 memory accesses to 8 slices as follows [2, 7, 8, 8, 7, 7, 6, 6]. 16 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0, 0, 0, 0, 0, 0]. The 10 writes are split as follows [0, 0, 2, 2, 1, 1, 2, 2]. [2023-11-29 03:41:29,017 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:28" (1/1) ... [2023-11-29 03:41:29,018 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:28" (1/1) ... [2023-11-29 03:41:29,028 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:28" (1/1) ... [2023-11-29 03:41:29,031 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:28" (1/1) ... [2023-11-29 03:41:29,034 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:28" (1/1) ... [2023-11-29 03:41:29,036 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:28" (1/1) ... [2023-11-29 03:41:29,041 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 03:41:29,042 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 03:41:29,043 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 03:41:29,043 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 03:41:29,044 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:28" (1/1) ... [2023-11-29 03:41:29,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:41:29,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:41:29,073 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 03:41:29,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 03:41:29,111 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 03:41:29,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-29 03:41:29,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-29 03:41:29,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-29 03:41:29,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-29 03:41:29,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#4 [2023-11-29 03:41:29,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#5 [2023-11-29 03:41:29,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#6 [2023-11-29 03:41:29,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#7 [2023-11-29 03:41:29,114 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 03:41:29,114 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 03:41:29,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 03:41:29,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-29 03:41:29,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-29 03:41:29,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-29 03:41:29,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-29 03:41:29,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#4 [2023-11-29 03:41:29,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#5 [2023-11-29 03:41:29,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#6 [2023-11-29 03:41:29,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#7 [2023-11-29 03:41:29,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 03:41:29,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 03:41:29,117 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-29 03:41:29,117 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-29 03:41:29,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 03:41:29,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-29 03:41:29,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-29 03:41:29,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-29 03:41:29,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-29 03:41:29,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#4 [2023-11-29 03:41:29,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#5 [2023-11-29 03:41:29,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#6 [2023-11-29 03:41:29,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#7 [2023-11-29 03:41:29,120 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_35_to_46_0 [2023-11-29 03:41:29,120 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_35_to_46_0 [2023-11-29 03:41:29,248 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 03:41:29,250 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 03:41:29,565 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 03:41:29,605 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 03:41:29,605 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 03:41:29,606 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:41:29 BoogieIcfgContainer [2023-11-29 03:41:29,606 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 03:41:29,609 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 03:41:29,610 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 03:41:29,613 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 03:41:29,614 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 03:41:28" (1/3) ... [2023-11-29 03:41:29,614 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b187443 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:41:29, skipping insertion in model container [2023-11-29 03:41:29,615 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:28" (2/3) ... [2023-11-29 03:41:29,615 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b187443 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:41:29, skipping insertion in model container [2023-11-29 03:41:29,615 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:41:29" (3/3) ... [2023-11-29 03:41:29,617 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_lcm2.c [2023-11-29 03:41:29,639 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 03:41:29,639 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 03:41:29,695 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 03:41:29,702 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;@1a1a213e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 03:41:29,703 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 03:41:29,707 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 03:41:29,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-29 03:41:29,717 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:41:29,718 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:41:29,719 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:41:29,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:41:29,725 INFO L85 PathProgramCache]: Analyzing trace with hash 897324978, now seen corresponding path program 1 times [2023-11-29 03:41:29,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:41:29,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [123778455] [2023-11-29 03:41:29,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:41:29,741 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:41:29,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:41:29,742 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 03:41:29,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-29 03:41:29,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:29,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 03:41:29,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:41:29,966 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 03:41:29,966 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:41:29,967 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 03:41:29,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [123778455] [2023-11-29 03:41:29,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [123778455] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:41:29,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:41:29,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:41:29,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321493340] [2023-11-29 03:41:29,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:41:29,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 03:41:29,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 03:41:30,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 03:41:30,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 03:41:30,010 INFO L87 Difference]: Start difference. First operand has 33 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 03:41:30,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:41:30,051 INFO L93 Difference]: Finished difference Result 64 states and 89 transitions. [2023-11-29 03:41:30,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 03:41:30,054 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-11-29 03:41:30,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:41:30,060 INFO L225 Difference]: With dead ends: 64 [2023-11-29 03:41:30,060 INFO L226 Difference]: Without dead ends: 31 [2023-11-29 03:41:30,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 03:41:30,067 INFO L413 NwaCegarLoop]: 37 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, 37 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 [2023-11-29 03:41:30,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:41:30,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-29 03:41:30,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-11-29 03:41:30,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 03:41:30,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2023-11-29 03:41:30,104 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 32 [2023-11-29 03:41:30,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:41:30,105 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2023-11-29 03:41:30,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 03:41:30,106 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2023-11-29 03:41:30,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-29 03:41:30,108 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:41:30,108 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:41:30,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-29 03:41:30,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:41:30,309 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:41:30,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:41:30,310 INFO L85 PathProgramCache]: Analyzing trace with hash -409193286, now seen corresponding path program 1 times [2023-11-29 03:41:30,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:41:30,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [949944278] [2023-11-29 03:41:30,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:41:30,311 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:41:30,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:41:30,313 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 03:41:30,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb7f206-cb95-4003-8b09-840752b2afe9/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process