./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819e950a-d18b-4dcc-a399-79cf60d41671/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819e950a-d18b-4dcc-a399-79cf60d41671/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819e950a-d18b-4dcc-a399-79cf60d41671/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819e950a-d18b-4dcc-a399-79cf60d41671/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819e950a-d18b-4dcc-a399-79cf60d41671/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819e950a-d18b-4dcc-a399-79cf60d41671/bin/uautomizer-verify-4GaUIPS5ZU --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 7f73abe50a425917d2dd4066f1792742190b4ae9dbdaa6d6431079d0ef1d76a5 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 21:58:34,289 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 21:58:34,372 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819e950a-d18b-4dcc-a399-79cf60d41671/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 21:58:34,380 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 21:58:34,380 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 21:58:34,418 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 21:58:34,418 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 21:58:34,420 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 21:58:34,421 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 21:58:34,423 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 21:58:34,424 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 21:58:34,425 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 21:58:34,426 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 21:58:34,426 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 21:58:34,430 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 21:58:34,431 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 21:58:34,431 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 21:58:34,431 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 21:58:34,432 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 21:58:34,432 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 21:58:34,432 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 21:58:34,433 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 21:58:34,434 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 21:58:34,434 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 21:58:34,434 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 21:58:34,434 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 21:58:34,435 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 21:58:34,435 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 21:58:34,435 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 21:58:34,436 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 21:58:34,436 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 21:58:34,436 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 21:58:34,439 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:58:34,440 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 21:58:34,441 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 21:58:34,441 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 21:58:34,441 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 21:58:34,442 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 21:58:34,443 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 21:58:34,443 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 21:58:34,443 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 21:58:34,444 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 21:58:34,444 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_819e950a-d18b-4dcc-a399-79cf60d41671/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819e950a-d18b-4dcc-a399-79cf60d41671/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f73abe50a425917d2dd4066f1792742190b4ae9dbdaa6d6431079d0ef1d76a5 [2024-10-31 21:58:34,756 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 21:58:34,788 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 21:58:34,791 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 21:58:34,793 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 21:58:34,793 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 21:58:34,795 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819e950a-d18b-4dcc-a399-79cf60d41671/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound100.c Unable to find full path for "g++" [2024-10-31 21:58:36,770 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 21:58:37,011 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 21:58:37,012 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819e950a-d18b-4dcc-a399-79cf60d41671/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound100.c [2024-10-31 21:58:37,023 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819e950a-d18b-4dcc-a399-79cf60d41671/bin/uautomizer-verify-4GaUIPS5ZU/data/3e1086be9/5708481f00574141b09b19bf804f7dd7/FLAGd707be526 [2024-10-31 21:58:37,037 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819e950a-d18b-4dcc-a399-79cf60d41671/bin/uautomizer-verify-4GaUIPS5ZU/data/3e1086be9/5708481f00574141b09b19bf804f7dd7 [2024-10-31 21:58:37,040 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 21:58:37,042 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 21:58:37,044 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 21:58:37,044 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 21:58:37,052 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 21:58:37,053 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:58:37" (1/1) ... [2024-10-31 21:58:37,055 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@712512c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:37, skipping insertion in model container [2024-10-31 21:58:37,057 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:58:37" (1/1) ... [2024-10-31 21:58:37,083 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 21:58:37,277 WARN L251 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_819e950a-d18b-4dcc-a399-79cf60d41671/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound100.c[537,550] [2024-10-31 21:58:37,303 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:58:37,313 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 21:58:37,328 WARN L251 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_819e950a-d18b-4dcc-a399-79cf60d41671/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound100.c[537,550] [2024-10-31 21:58:37,340 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:58:37,360 INFO L204 MainTranslator]: Completed translation [2024-10-31 21:58:37,361 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:37 WrapperNode [2024-10-31 21:58:37,361 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 21:58:37,362 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 21:58:37,362 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 21:58:37,363 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 21:58:37,371 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:37" (1/1) ... [2024-10-31 21:58:37,380 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:37" (1/1) ... [2024-10-31 21:58:37,403 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 56 [2024-10-31 21:58:37,404 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 21:58:37,405 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 21:58:37,405 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 21:58:37,405 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 21:58:37,423 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:37" (1/1) ... [2024-10-31 21:58:37,423 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:37" (1/1) ... [2024-10-31 21:58:37,425 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:37" (1/1) ... [2024-10-31 21:58:37,442 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-31 21:58:37,444 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:37" (1/1) ... [2024-10-31 21:58:37,445 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:37" (1/1) ... [2024-10-31 21:58:37,447 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:37" (1/1) ... [2024-10-31 21:58:37,451 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:37" (1/1) ... [2024-10-31 21:58:37,452 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:37" (1/1) ... [2024-10-31 21:58:37,453 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:37" (1/1) ... [2024-10-31 21:58:37,455 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 21:58:37,456 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 21:58:37,456 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 21:58:37,457 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 21:58:37,458 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:37" (1/1) ... [2024-10-31 21:58:37,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:58:37,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819e950a-d18b-4dcc-a399-79cf60d41671/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:58:37,500 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819e950a-d18b-4dcc-a399-79cf60d41671/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 21:58:37,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819e950a-d18b-4dcc-a399-79cf60d41671/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 21:58:37,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 21:58:37,537 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-31 21:58:37,538 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-31 21:58:37,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 21:58:37,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 21:58:37,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 21:58:37,538 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-31 21:58:37,540 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-31 21:58:37,623 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 21:58:37,626 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 21:58:37,864 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-10-31 21:58:37,864 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 21:58:37,884 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 21:58:37,884 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-31 21:58:37,885 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:58:37 BoogieIcfgContainer [2024-10-31 21:58:37,885 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 21:58:37,889 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 21:58:37,889 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 21:58:37,893 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 21:58:37,894 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 09:58:37" (1/3) ... [2024-10-31 21:58:37,895 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@186e8d77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:58:37, skipping insertion in model container [2024-10-31 21:58:37,895 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:37" (2/3) ... [2024-10-31 21:58:37,896 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@186e8d77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:58:37, skipping insertion in model container [2024-10-31 21:58:37,896 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:58:37" (3/3) ... [2024-10-31 21:58:37,898 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound100.c [2024-10-31 21:58:37,920 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 21:58:37,920 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 21:58:37,995 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 21:58:38,004 INFO L333 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, 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;@5e10a656, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 21:58:38,005 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 21:58:38,009 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-31 21:58:38,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-31 21:58:38,019 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:58:38,020 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:58:38,021 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:58:38,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:58:38,027 INFO L85 PathProgramCache]: Analyzing trace with hash -487550744, now seen corresponding path program 1 times [2024-10-31 21:58:38,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:58:38,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262531969] [2024-10-31 21:58:38,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:38,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:58:38,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:38,222 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 21:58:38,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:38,236 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-31 21:58:38,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:38,245 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-31 21:58:38,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:38,255 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-31 21:58:38,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:58:38,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262531969] [2024-10-31 21:58:38,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262531969] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:58:38,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:58:38,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 21:58:38,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673229976] [2024-10-31 21:58:38,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:58:38,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-31 21:58:38,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:58:38,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-31 21:58:38,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 21:58:38,297 INFO L87 Difference]: Start difference. First operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 21:58:38,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:58:38,326 INFO L93 Difference]: Finished difference Result 63 states and 104 transitions. [2024-10-31 21:58:38,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-31 21:58:38,328 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-10-31 21:58:38,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:58:38,337 INFO L225 Difference]: With dead ends: 63 [2024-10-31 21:58:38,337 INFO L226 Difference]: Without dead ends: 29 [2024-10-31 21:58:38,341 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 21:58:38,345 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 21:58:38,347 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 21:58:38,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-10-31 21:58:38,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-10-31 21:58:38,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-31 21:58:38,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2024-10-31 21:58:38,400 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 24 [2024-10-31 21:58:38,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:58:38,403 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2024-10-31 21:58:38,403 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 21:58:38,403 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2024-10-31 21:58:38,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-31 21:58:38,406 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:58:38,406 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:58:38,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 21:58:38,408 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:58:38,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:58:38,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1636258074, now seen corresponding path program 1 times [2024-10-31 21:58:38,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:58:38,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522133547] [2024-10-31 21:58:38,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:38,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:58:38,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:39,060 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 21:58:39,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:39,082 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-31 21:58:39,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:39,095 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-31 21:58:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:39,127 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-31 21:58:39,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:58:39,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522133547] [2024-10-31 21:58:39,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522133547] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:58:39,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:58:39,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 21:58:39,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203792333] [2024-10-31 21:58:39,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:58:39,133 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 21:58:39,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:58:39,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 21:58:39,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:58:39,136 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 21:58:39,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:58:39,271 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2024-10-31 21:58:39,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 21:58:39,274 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2024-10-31 21:58:39,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:58:39,279 INFO L225 Difference]: With dead ends: 42 [2024-10-31 21:58:39,280 INFO L226 Difference]: Without dead ends: 40 [2024-10-31 21:58:39,282 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 21:58:39,284 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 9 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 21:58:39,287 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 126 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 21:58:39,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-10-31 21:58:39,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2024-10-31 21:58:39,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-31 21:58:39,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2024-10-31 21:58:39,314 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 24 [2024-10-31 21:58:39,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:58:39,317 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2024-10-31 21:58:39,317 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 21:58:39,318 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2024-10-31 21:58:39,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-31 21:58:39,319 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:58:39,319 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:58:39,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 21:58:39,322 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:58:39,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:58:39,324 INFO L85 PathProgramCache]: Analyzing trace with hash 906849917, now seen corresponding path program 1 times [2024-10-31 21:58:39,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:58:39,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857324228] [2024-10-31 21:58:39,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:39,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:58:39,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:39,926 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 21:58:39,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:39,936 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-31 21:58:39,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:39,945 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-31 21:58:39,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:39,951 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-31 21:58:39,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:39,976 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-31 21:58:39,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:58:39,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857324228] [2024-10-31 21:58:39,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857324228] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:58:39,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:58:39,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 21:58:39,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249094869] [2024-10-31 21:58:39,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:58:39,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 21:58:39,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:58:39,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 21:58:39,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:58:39,984 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 21:58:40,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:58:40,164 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2024-10-31 21:58:40,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 21:58:40,168 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2024-10-31 21:58:40,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:58:40,170 INFO L225 Difference]: With dead ends: 46 [2024-10-31 21:58:40,170 INFO L226 Difference]: Without dead ends: 44 [2024-10-31 21:58:40,170 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 21:58:40,171 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 9 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 21:58:40,174 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 123 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 21:58:40,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-31 21:58:40,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2024-10-31 21:58:40,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-31 21:58:40,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2024-10-31 21:58:40,191 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 29 [2024-10-31 21:58:40,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:58:40,192 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2024-10-31 21:58:40,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 21:58:40,192 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2024-10-31 21:58:40,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-31 21:58:40,194 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:58:40,194 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:58:40,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 21:58:40,195 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:58:40,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:58:40,196 INFO L85 PathProgramCache]: Analyzing trace with hash 710995206, now seen corresponding path program 1 times [2024-10-31 21:58:40,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:58:40,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530413858] [2024-10-31 21:58:40,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:40,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:58:40,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 21:58:40,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [697736915] [2024-10-31 21:58:40,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:40,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:40,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819e950a-d18b-4dcc-a399-79cf60d41671/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:58:40,249 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819e950a-d18b-4dcc-a399-79cf60d41671/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:58:40,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819e950a-d18b-4dcc-a399-79cf60d41671/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 21:58:40,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:40,341 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-31 21:58:40,347 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:58:40,689 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-31 21:58:40,693 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 21:58:40,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:58:40,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530413858] [2024-10-31 21:58:40,695 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 21:58:40,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697736915] [2024-10-31 21:58:40,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697736915] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:58:40,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:58:40,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-31 21:58:40,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157355955] [2024-10-31 21:58:40,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:58:40,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 21:58:40,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:58:40,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 21:58:40,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-10-31 21:58:40,703 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-31 21:58:40,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:58:40,976 INFO L93 Difference]: Finished difference Result 63 states and 82 transitions. [2024-10-31 21:58:40,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 21:58:40,977 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 34 [2024-10-31 21:58:40,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:58:40,980 INFO L225 Difference]: With dead ends: 63 [2024-10-31 21:58:40,980 INFO L226 Difference]: Without dead ends: 50 [2024-10-31 21:58:40,993 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-10-31 21:58:40,994 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 17 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 21:58:40,995 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 169 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 21:58:40,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-10-31 21:58:41,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-10-31 21:58:41,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 30 states have internal predecessors, (34), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-10-31 21:58:41,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2024-10-31 21:58:41,025 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 34 [2024-10-31 21:58:41,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:58:41,030 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2024-10-31 21:58:41,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-31 21:58:41,030 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2024-10-31 21:58:41,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-31 21:58:41,031 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:58:41,032 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:58:41,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819e950a-d18b-4dcc-a399-79cf60d41671/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 21:58:41,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819e950a-d18b-4dcc-a399-79cf60d41671/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-10-31 21:58:41,233 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:58:41,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:58:41,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1829555286, now seen corresponding path program 1 times [2024-10-31 21:58:41,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:58:41,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733087059] [2024-10-31 21:58:41,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:41,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:58:41,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 21:58:41,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1216064098] [2024-10-31 21:58:41,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:41,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:41,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819e950a-d18b-4dcc-a399-79cf60d41671/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:58:41,269 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819e950a-d18b-4dcc-a399-79cf60d41671/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:58:41,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819e950a-d18b-4dcc-a399-79cf60d41671/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 21:58:41,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:41,353 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-31 21:58:41,361 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:58:41,734 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-31 21:58:41,734 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:58:43,383 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-31 21:58:43,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:58:43,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733087059] [2024-10-31 21:58:43,384 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 21:58:43,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216064098] [2024-10-31 21:58:43,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216064098] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:58:43,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 21:58:43,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2024-10-31 21:58:43,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857150613] [2024-10-31 21:58:43,385 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 21:58:43,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-31 21:58:43,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:58:43,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-31 21:58:43,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-10-31 21:58:43,387 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2024-10-31 21:58:44,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:58:44,094 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2024-10-31 21:58:44,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-31 21:58:44,095 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) Word has length 41 [2024-10-31 21:58:44,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:58:44,097 INFO L225 Difference]: With dead ends: 68 [2024-10-31 21:58:44,098 INFO L226 Difference]: Without dead ends: 60 [2024-10-31 21:58:44,098 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2024-10-31 21:58:44,099 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-31 21:58:44,100 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 157 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-31 21:58:44,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-10-31 21:58:44,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-10-31 21:58:44,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 39 states have internal predecessors, (41), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-10-31 21:58:44,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2024-10-31 21:58:44,116 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 41 [2024-10-31 21:58:44,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:58:44,117 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2024-10-31 21:58:44,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2024-10-31 21:58:44,118 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2024-10-31 21:58:44,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-31 21:58:44,119 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:58:44,119 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:58:44,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819e950a-d18b-4dcc-a399-79cf60d41671/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-31 21:58:44,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819e950a-d18b-4dcc-a399-79cf60d41671/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:44,320 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:58:44,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:58:44,321 INFO L85 PathProgramCache]: Analyzing trace with hash 105343995, now seen corresponding path program 1 times [2024-10-31 21:58:44,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:58:44,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626457566] [2024-10-31 21:58:44,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:44,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:58:44,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 21:58:44,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1000069719] [2024-10-31 21:58:44,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:44,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:44,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819e950a-d18b-4dcc-a399-79cf60d41671/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:58:44,356 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819e950a-d18b-4dcc-a399-79cf60d41671/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:58:44,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819e950a-d18b-4dcc-a399-79cf60d41671/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 21:58:44,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:44,529 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-31 21:58:44,531 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:58:44,628 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-10-31 21:58:44,628 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:58:44,829 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-10-31 21:58:44,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:58:44,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626457566] [2024-10-31 21:58:44,830 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 21:58:44,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000069719] [2024-10-31 21:58:44,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000069719] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 21:58:44,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 21:58:44,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2024-10-31 21:58:44,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049048659] [2024-10-31 21:58:44,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:58:44,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 21:58:44,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:58:44,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 21:58:44,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-10-31 21:58:44,836 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-10-31 21:58:46,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-31 21:58:47,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:58:47,004 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2024-10-31 21:58:47,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 21:58:47,005 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 51 [2024-10-31 21:58:47,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:58:47,007 INFO L225 Difference]: With dead ends: 70 [2024-10-31 21:58:47,007 INFO L226 Difference]: Without dead ends: 68 [2024-10-31 21:58:47,007 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-10-31 21:58:47,008 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-10-31 21:58:47,008 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 144 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-10-31 21:58:47,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-10-31 21:58:47,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2024-10-31 21:58:47,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 44 states have internal predecessors, (45), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-10-31 21:58:47,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2024-10-31 21:58:47,035 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 51 [2024-10-31 21:58:47,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:58:47,036 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2024-10-31 21:58:47,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-10-31 21:58:47,037 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2024-10-31 21:58:47,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-10-31 21:58:47,038 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:58:47,038 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 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] [2024-10-31 21:58:47,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819e950a-d18b-4dcc-a399-79cf60d41671/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 21:58:47,238 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819e950a-d18b-4dcc-a399-79cf60d41671/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:47,239 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:58:47,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:58:47,239 INFO L85 PathProgramCache]: Analyzing trace with hash -677073599, now seen corresponding path program 1 times [2024-10-31 21:58:47,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:58:47,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203466957] [2024-10-31 21:58:47,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:47,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:58:47,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:47,362 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 21:58:47,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:47,365 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-31 21:58:47,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:47,370 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-31 21:58:47,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:47,373 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-31 21:58:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:47,380 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-31 21:58:47,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:47,387 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-10-31 21:58:47,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:47,395 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-31 21:58:47,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:47,407 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-31 21:58:47,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:47,417 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-10-31 21:58:47,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:47,428 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-10-31 21:58:47,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:47,440 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-10-31 21:58:47,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:47,452 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-10-31 21:58:47,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:58:47,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203466957] [2024-10-31 21:58:47,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203466957] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:58:47,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538839385] [2024-10-31 21:58:47,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:47,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:47,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819e950a-d18b-4dcc-a399-79cf60d41671/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:58:47,458 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819e950a-d18b-4dcc-a399-79cf60d41671/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:58:47,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819e950a-d18b-4dcc-a399-79cf60d41671/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 21:58:47,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:47,521 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-31 21:58:47,523 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:58:47,636 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-10-31 21:58:47,639 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:58:47,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538839385] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:58:47,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 21:58:47,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8] total 10 [2024-10-31 21:58:47,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031725414] [2024-10-31 21:58:47,740 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 21:58:47,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 21:58:47,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:58:47,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 21:58:47,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-10-31 21:58:47,743 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 6 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-10-31 21:58:48,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:58:48,037 INFO L93 Difference]: Finished difference Result 99 states and 119 transitions. [2024-10-31 21:58:48,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 21:58:48,038 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 6 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 69 [2024-10-31 21:58:48,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:58:48,040 INFO L225 Difference]: With dead ends: 99 [2024-10-31 21:58:48,041 INFO L226 Difference]: Without dead ends: 91 [2024-10-31 21:58:48,042 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-10-31 21:58:48,043 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 20 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 21:58:48,043 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 188 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 21:58:48,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-10-31 21:58:48,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2024-10-31 21:58:48,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 58 states have internal predecessors, (61), 24 states have call successors, (24), 11 states have call predecessors, (24), 11 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2024-10-31 21:58:48,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 108 transitions. [2024-10-31 21:58:48,074 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 108 transitions. Word has length 69 [2024-10-31 21:58:48,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:58:48,074 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 108 transitions. [2024-10-31 21:58:48,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 6 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-10-31 21:58:48,075 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 108 transitions. [2024-10-31 21:58:48,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-10-31 21:58:48,076 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:58:48,076 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:58:48,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819e950a-d18b-4dcc-a399-79cf60d41671/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 21:58:48,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819e950a-d18b-4dcc-a399-79cf60d41671/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:48,277 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:58:48,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:58:48,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1754894755, now seen corresponding path program 1 times [2024-10-31 21:58:48,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:58:48,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62276612] [2024-10-31 21:58:48,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:48,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:58:48,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 21:58:48,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [860408696] [2024-10-31 21:58:48,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:48,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:48,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819e950a-d18b-4dcc-a399-79cf60d41671/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:58:48,322 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819e950a-d18b-4dcc-a399-79cf60d41671/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:58:48,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819e950a-d18b-4dcc-a399-79cf60d41671/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 21:58:49,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:49,137 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-10-31 21:58:49,141 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:58:50,784 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 43 proven. 31 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2024-10-31 21:58:50,784 INFO L311 TraceCheckSpWp]: Computing backward predicates...