./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/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_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/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_040d7c78-4f91-4561-a24c-a5e033b8475b/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 5f094e7ea34d2025ab25ab51a4a0b06d8f845826c76dbd06e91f3d4a761fa19b --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 21:55:24,294 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 21:55:24,360 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 21:55:24,365 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 21:55:24,365 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 21:55:24,388 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 21:55:24,388 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 21:55:24,389 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 21:55:24,390 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 21:55:24,390 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 21:55:24,390 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 21:55:24,394 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 21:55:24,395 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 21:55:24,397 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 21:55:24,397 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 21:55:24,398 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 21:55:24,398 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 21:55:24,399 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 21:55:24,399 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 21:55:24,399 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 21:55:24,400 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 21:55:24,404 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 21:55:24,405 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 21:55:24,405 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 21:55:24,405 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 21:55:24,405 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 21:55:24,406 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 21:55:24,406 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 21:55:24,406 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 21:55:24,406 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 21:55:24,407 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 21:55:24,407 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 21:55:24,407 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:55:24,407 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 21:55:24,408 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 21:55:24,409 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 21:55:24,409 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 21:55:24,410 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 21:55:24,410 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 21:55:24,410 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 21:55:24,411 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 21:55:24,412 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 21:55:24,412 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_040d7c78-4f91-4561-a24c-a5e033b8475b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5f094e7ea34d2025ab25ab51a4a0b06d8f845826c76dbd06e91f3d4a761fa19b [2024-10-31 21:55:24,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 21:55:24,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 21:55:24,718 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 21:55:24,720 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 21:55:24,720 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 21:55:24,721 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound5.c Unable to find full path for "g++" [2024-10-31 21:55:26,794 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 21:55:27,029 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 21:55:27,030 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound5.c [2024-10-31 21:55:27,040 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/data/f975bb92c/c1c72808c96a4d1495d670ba4cfece5b/FLAGb6adcefef [2024-10-31 21:55:27,356 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/data/f975bb92c/c1c72808c96a4d1495d670ba4cfece5b [2024-10-31 21:55:27,358 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 21:55:27,360 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 21:55:27,361 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 21:55:27,361 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 21:55:27,368 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 21:55:27,369 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:55:27" (1/1) ... [2024-10-31 21:55:27,370 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e873240 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:27, skipping insertion in model container [2024-10-31 21:55:27,370 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:55:27" (1/1) ... [2024-10-31 21:55:27,395 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 21:55:27,617 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_040d7c78-4f91-4561-a24c-a5e033b8475b/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound5.c[526,539] [2024-10-31 21:55:27,634 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:55:27,644 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 21:55:27,659 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_040d7c78-4f91-4561-a24c-a5e033b8475b/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound5.c[526,539] [2024-10-31 21:55:27,668 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:55:27,692 INFO L204 MainTranslator]: Completed translation [2024-10-31 21:55:27,693 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:27 WrapperNode [2024-10-31 21:55:27,693 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 21:55:27,694 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 21:55:27,695 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 21:55:27,695 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 21:55:27,704 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:27" (1/1) ... [2024-10-31 21:55:27,713 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:27" (1/1) ... [2024-10-31 21:55:27,731 INFO L138 Inliner]: procedures = 14, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2024-10-31 21:55:27,732 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 21:55:27,732 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 21:55:27,733 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 21:55:27,733 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 21:55:27,744 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:27" (1/1) ... [2024-10-31 21:55:27,746 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:27" (1/1) ... [2024-10-31 21:55:27,747 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:27" (1/1) ... [2024-10-31 21:55:27,761 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2024-10-31 21:55:27,762 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:27" (1/1) ... [2024-10-31 21:55:27,762 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:27" (1/1) ... [2024-10-31 21:55:27,765 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:27" (1/1) ... [2024-10-31 21:55:27,769 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:27" (1/1) ... [2024-10-31 21:55:27,771 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:27" (1/1) ... [2024-10-31 21:55:27,772 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:27" (1/1) ... [2024-10-31 21:55:27,774 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 21:55:27,775 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 21:55:27,775 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 21:55:27,775 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 21:55:27,777 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:27" (1/1) ... [2024-10-31 21:55:27,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:55:27,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:55:27,807 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 21:55:27,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 21:55:27,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 21:55:27,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 21:55:27,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 21:55:27,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 21:55:27,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 21:55:27,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-31 21:55:27,841 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-31 21:55:27,908 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 21:55:27,910 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 21:55:28,082 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-10-31 21:55:28,082 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 21:55:28,095 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 21:55:28,095 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-31 21:55:28,095 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:55:28 BoogieIcfgContainer [2024-10-31 21:55:28,096 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 21:55:28,098 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 21:55:28,099 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 21:55:28,102 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 21:55:28,102 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 09:55:27" (1/3) ... [2024-10-31 21:55:28,103 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f780496 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:55:28, skipping insertion in model container [2024-10-31 21:55:28,103 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:27" (2/3) ... [2024-10-31 21:55:28,104 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f780496 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:55:28, skipping insertion in model container [2024-10-31 21:55:28,104 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:55:28" (3/3) ... [2024-10-31 21:55:28,105 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound5.c [2024-10-31 21:55:28,124 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 21:55:28,124 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 21:55:28,175 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 21:55:28,181 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;@f5a9a42, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 21:55:28,181 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 21:55:28,187 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-31 21:55:28,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-31 21:55:28,197 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:55:28,198 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:55:28,199 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:55:28,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:28,204 INFO L85 PathProgramCache]: Analyzing trace with hash 643118537, now seen corresponding path program 1 times [2024-10-31 21:55:28,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:28,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819803857] [2024-10-31 21:55:28,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:28,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:28,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:28,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:28,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:28,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819803857] [2024-10-31 21:55:28,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819803857] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:55:28,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:55:28,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 21:55:28,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976135891] [2024-10-31 21:55:28,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:55:28,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-31 21:55:28,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:28,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-31 21:55:28,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 21:55:28,427 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:28,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:55:28,453 INFO L93 Difference]: Finished difference Result 50 states and 83 transitions. [2024-10-31 21:55:28,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-31 21:55:28,457 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-31 21:55:28,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:55:28,466 INFO L225 Difference]: With dead ends: 50 [2024-10-31 21:55:28,466 INFO L226 Difference]: Without dead ends: 22 [2024-10-31 21:55:28,471 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 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 21:55:28,474 INFO L432 NwaCegarLoop]: 36 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, 36 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 21:55:28,475 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 21:55:28,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-10-31 21:55:28,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-10-31 21:55:28,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-31 21:55:28,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2024-10-31 21:55:28,511 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 8 [2024-10-31 21:55:28,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:55:28,512 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2024-10-31 21:55:28,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:28,513 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2024-10-31 21:55:28,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-31 21:55:28,513 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:55:28,514 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:55:28,514 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 21:55:28,514 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:55:28,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:28,516 INFO L85 PathProgramCache]: Analyzing trace with hash 181060127, now seen corresponding path program 1 times [2024-10-31 21:55:28,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:28,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378399339] [2024-10-31 21:55:28,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:28,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:28,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:28,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:28,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:28,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378399339] [2024-10-31 21:55:28,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378399339] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:55:28,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:55:28,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 21:55:28,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382428388] [2024-10-31 21:55:28,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:55:28,874 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 21:55:28,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:28,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 21:55:28,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:55:28,881 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:28,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:55:28,972 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2024-10-31 21:55:28,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 21:55:28,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-31 21:55:28,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:55:28,975 INFO L225 Difference]: With dead ends: 36 [2024-10-31 21:55:28,975 INFO L226 Difference]: Without dead ends: 34 [2024-10-31 21:55:28,975 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 21:55:28,977 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 12 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 21:55:28,977 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 97 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 21:55:28,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-10-31 21:55:28,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2024-10-31 21:55:28,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-31 21:55:28,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2024-10-31 21:55:28,995 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 8 [2024-10-31 21:55:28,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:55:28,996 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2024-10-31 21:55:28,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:28,996 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2024-10-31 21:55:28,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-31 21:55:28,997 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:55:28,997 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:55:28,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 21:55:29,000 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:55:29,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:29,001 INFO L85 PathProgramCache]: Analyzing trace with hash -712280900, now seen corresponding path program 1 times [2024-10-31 21:55:29,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:29,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644180661] [2024-10-31 21:55:29,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:29,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:29,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:29,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:29,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:29,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644180661] [2024-10-31 21:55:29,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644180661] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:55:29,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:55:29,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 21:55:29,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905612460] [2024-10-31 21:55:29,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:55:29,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 21:55:29,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:29,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 21:55:29,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:55:29,163 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:29,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:55:29,194 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2024-10-31 21:55:29,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 21:55:29,197 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-10-31 21:55:29,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:55:29,198 INFO L225 Difference]: With dead ends: 42 [2024-10-31 21:55:29,198 INFO L226 Difference]: Without dead ends: 28 [2024-10-31 21:55:29,198 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:55:29,200 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 21:55:29,202 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 85 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 21:55:29,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-10-31 21:55:29,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-10-31 21:55:29,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-31 21:55:29,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2024-10-31 21:55:29,217 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2024-10-31 21:55:29,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:55:29,218 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2024-10-31 21:55:29,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:29,218 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2024-10-31 21:55:29,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-31 21:55:29,219 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:55:29,219 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:55:29,219 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 21:55:29,220 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:55:29,221 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:29,221 INFO L85 PathProgramCache]: Analyzing trace with hash 2036073049, now seen corresponding path program 1 times [2024-10-31 21:55:29,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:29,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223387543] [2024-10-31 21:55:29,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:29,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:29,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:29,404 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-31 21:55:29,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:29,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:29,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:29,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223387543] [2024-10-31 21:55:29,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223387543] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:55:29,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:55:29,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 21:55:29,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949749538] [2024-10-31 21:55:29,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:55:29,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 21:55:29,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:29,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 21:55:29,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:55:29,425 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-31 21:55:29,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:55:29,509 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2024-10-31 21:55:29,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 21:55:29,510 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-10-31 21:55:29,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:55:29,511 INFO L225 Difference]: With dead ends: 42 [2024-10-31 21:55:29,511 INFO L226 Difference]: Without dead ends: 40 [2024-10-31 21:55:29,512 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 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 21:55:29,513 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 12 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 21:55:29,513 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 94 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 21:55:29,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-10-31 21:55:29,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2024-10-31 21:55:29,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-31 21:55:29,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2024-10-31 21:55:29,521 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 13 [2024-10-31 21:55:29,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:55:29,522 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2024-10-31 21:55:29,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-31 21:55:29,522 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2024-10-31 21:55:29,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-31 21:55:29,523 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:55:29,523 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:55:29,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 21:55:29,523 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:55:29,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:29,524 INFO L85 PathProgramCache]: Analyzing trace with hash 380169759, now seen corresponding path program 1 times [2024-10-31 21:55:29,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:29,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768582273] [2024-10-31 21:55:29,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:29,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:29,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 21:55:29,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1754099234] [2024-10-31 21:55:29,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:29,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:55:29,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:55:29,543 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:55:29,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 21:55:29,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:29,610 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 21:55:29,616 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:55:29,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 21:55:29,773 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 21:55:29,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:29,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768582273] [2024-10-31 21:55:29,775 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 21:55:29,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754099234] [2024-10-31 21:55:29,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754099234] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:55:29,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:55:29,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 21:55:29,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281086358] [2024-10-31 21:55:29,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:55:29,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 21:55:29,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:29,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 21:55:29,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:55:29,781 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-31 21:55:29,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:55:29,885 INFO L93 Difference]: Finished difference Result 61 states and 83 transitions. [2024-10-31 21:55:29,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 21:55:29,886 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2024-10-31 21:55:29,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:55:29,888 INFO L225 Difference]: With dead ends: 61 [2024-10-31 21:55:29,890 INFO L226 Difference]: Without dead ends: 46 [2024-10-31 21:55:29,891 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 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 21:55:29,892 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 7 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 21:55:29,892 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 98 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 21:55:29,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-10-31 21:55:29,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-10-31 21:55:29,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 30 states have internal predecessors, (36), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-10-31 21:55:29,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2024-10-31 21:55:29,913 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 18 [2024-10-31 21:55:29,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:55:29,914 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2024-10-31 21:55:29,914 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-31 21:55:29,914 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2024-10-31 21:55:29,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-31 21:55:29,919 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:55:29,919 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:55:29,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 21:55:30,119 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:55:30,120 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:55:30,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:30,121 INFO L85 PathProgramCache]: Analyzing trace with hash -461064832, now seen corresponding path program 1 times [2024-10-31 21:55:30,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:30,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316408576] [2024-10-31 21:55:30,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:30,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:30,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 21:55:30,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1234016526] [2024-10-31 21:55:30,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:30,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:55:30,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:55:30,144 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:55:30,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 21:55:30,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:30,211 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-31 21:55:30,213 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:55:30,365 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-31 21:55:30,365 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:55:30,611 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-31 21:55:30,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:30,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316408576] [2024-10-31 21:55:30,611 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 21:55:30,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234016526] [2024-10-31 21:55:30,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234016526] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:55:30,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 21:55:30,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-10-31 21:55:30,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671299617] [2024-10-31 21:55:30,613 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 21:55:30,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 21:55:30,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:30,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 21:55:30,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-10-31 21:55:30,615 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-31 21:55:30,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:55:30,795 INFO L93 Difference]: Finished difference Result 60 states and 79 transitions. [2024-10-31 21:55:30,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 21:55:30,796 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 26 [2024-10-31 21:55:30,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:55:30,797 INFO L225 Difference]: With dead ends: 60 [2024-10-31 21:55:30,797 INFO L226 Difference]: Without dead ends: 57 [2024-10-31 21:55:30,798 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-10-31 21:55:30,799 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 9 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 21:55:30,800 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 122 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 21:55:30,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-10-31 21:55:30,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2024-10-31 21:55:30,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 37 states have internal predecessors, (45), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-10-31 21:55:30,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 74 transitions. [2024-10-31 21:55:30,822 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 74 transitions. Word has length 26 [2024-10-31 21:55:30,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:55:30,823 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 74 transitions. [2024-10-31 21:55:30,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-31 21:55:30,823 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 74 transitions. [2024-10-31 21:55:30,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-31 21:55:30,828 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:55:30,828 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:55:30,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 21:55:31,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-31 21:55:31,033 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:55:31,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:31,034 INFO L85 PathProgramCache]: Analyzing trace with hash -909290541, now seen corresponding path program 1 times [2024-10-31 21:55:31,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:31,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351581539] [2024-10-31 21:55:31,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:31,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:31,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:31,221 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-31 21:55:31,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:31,230 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-31 21:55:31,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:31,243 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-31 21:55:31,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:31,251 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-31 21:55:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-31 21:55:31,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:31,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351581539] [2024-10-31 21:55:31,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351581539] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:55:31,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158953198] [2024-10-31 21:55:31,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:31,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:55:31,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:55:31,258 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:55:31,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 21:55:31,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:31,315 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 21:55:31,317 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:55:31,368 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-31 21:55:31,368 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:55:31,443 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-31 21:55:31,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158953198] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:55:31,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:55:31,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 5] total 10 [2024-10-31 21:55:31,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104052470] [2024-10-31 21:55:31,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:55:31,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 21:55:31,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:31,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 21:55:31,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-10-31 21:55:31,446 INFO L87 Difference]: Start difference. First operand 56 states and 74 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-10-31 21:55:31,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:55:31,661 INFO L93 Difference]: Finished difference Result 155 states and 190 transitions. [2024-10-31 21:55:31,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 21:55:31,662 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 33 [2024-10-31 21:55:31,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:55:31,664 INFO L225 Difference]: With dead ends: 155 [2024-10-31 21:55:31,665 INFO L226 Difference]: Without dead ends: 130 [2024-10-31 21:55:31,665 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-10-31 21:55:31,668 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 56 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 21:55:31,669 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 170 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 21:55:31,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-10-31 21:55:31,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 123. [2024-10-31 21:55:31,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 79 states have (on average 1.2025316455696202) internal successors, (95), 83 states have internal predecessors, (95), 27 states have call successors, (27), 16 states have call predecessors, (27), 16 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-10-31 21:55:31,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 146 transitions. [2024-10-31 21:55:31,703 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 146 transitions. Word has length 33 [2024-10-31 21:55:31,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:55:31,703 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 146 transitions. [2024-10-31 21:55:31,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-10-31 21:55:31,707 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 146 transitions. [2024-10-31 21:55:31,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-31 21:55:31,708 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:55:31,708 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-10-31 21:55:31,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 21:55:31,908 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:55:31,909 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:55:31,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:31,909 INFO L85 PathProgramCache]: Analyzing trace with hash 252591112, now seen corresponding path program 1 times [2024-10-31 21:55:31,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:31,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138969916] [2024-10-31 21:55:31,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:31,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:31,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 21:55:31,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1466123839] [2024-10-31 21:55:31,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:31,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:55:31,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:55:31,944 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:55:31,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 21:55:32,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:32,008 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-31 21:55:32,010 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:55:32,141 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-31 21:55:32,141 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:55:32,230 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-31 21:55:32,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:32,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138969916] [2024-10-31 21:55:32,231 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 21:55:32,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466123839] [2024-10-31 21:55:32,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466123839] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 21:55:32,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 21:55:32,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-10-31 21:55:32,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441300488] [2024-10-31 21:55:32,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:55:32,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 21:55:32,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:32,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 21:55:32,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-31 21:55:32,233 INFO L87 Difference]: Start difference. First operand 123 states and 146 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 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 21:55:33,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-31 21:55:33,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:55:33,690 INFO L93 Difference]: Finished difference Result 146 states and 174 transitions. [2024-10-31 21:55:33,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 21:55:33,691 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), 1 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 36 [2024-10-31 21:55:33,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:55:33,693 INFO L225 Difference]: With dead ends: 146 [2024-10-31 21:55:33,693 INFO L226 Difference]: Without dead ends: 140 [2024-10-31 21:55:33,693 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-31 21:55:33,694 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-10-31 21:55:33,695 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 92 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-10-31 21:55:33,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-10-31 21:55:33,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 132. [2024-10-31 21:55:33,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 86 states have (on average 1.1744186046511629) internal successors, (101), 90 states have internal predecessors, (101), 28 states have call successors, (28), 18 states have call predecessors, (28), 17 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2024-10-31 21:55:33,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 155 transitions. [2024-10-31 21:55:33,725 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 155 transitions. Word has length 36 [2024-10-31 21:55:33,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:55:33,726 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 155 transitions. [2024-10-31 21:55:33,726 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), 1 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 21:55:33,726 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 155 transitions. [2024-10-31 21:55:33,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-31 21:55:33,727 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:55:33,727 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 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 21:55:33,748 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 21:55:33,932 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:55:33,932 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:55:33,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:33,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1776130969, now seen corresponding path program 1 times [2024-10-31 21:55:33,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:33,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523601575] [2024-10-31 21:55:33,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:33,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:33,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:34,075 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-31 21:55:34,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:34,081 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-31 21:55:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:34,086 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-31 21:55:34,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:34,092 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-31 21:55:34,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:34,099 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-31 21:55:34,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:34,107 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-10-31 21:55:34,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:34,113 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-31 21:55:34,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:34,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523601575] [2024-10-31 21:55:34,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523601575] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:55:34,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:55:34,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 21:55:34,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590782637] [2024-10-31 21:55:34,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:55:34,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 21:55:34,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:34,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 21:55:34,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:55:34,120 INFO L87 Difference]: Start difference. First operand 132 states and 155 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-31 21:55:34,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:55:34,194 INFO L93 Difference]: Finished difference Result 137 states and 159 transitions. [2024-10-31 21:55:34,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 21:55:34,194 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), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 42 [2024-10-31 21:55:34,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:55:34,196 INFO L225 Difference]: With dead ends: 137 [2024-10-31 21:55:34,196 INFO L226 Difference]: Without dead ends: 118 [2024-10-31 21:55:34,197 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 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 21:55:34,197 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 1 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 21:55:34,198 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 111 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 21:55:34,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-10-31 21:55:34,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2024-10-31 21:55:34,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 80 states have internal predecessors, (91), 25 states have call successors, (25), 16 states have call predecessors, (25), 15 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2024-10-31 21:55:34,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 139 transitions. [2024-10-31 21:55:34,219 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 139 transitions. Word has length 42 [2024-10-31 21:55:34,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:55:34,219 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 139 transitions. [2024-10-31 21:55:34,220 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), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-31 21:55:34,220 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 139 transitions. [2024-10-31 21:55:34,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-31 21:55:34,221 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:55:34,221 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:55:34,221 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 21:55:34,222 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:55:34,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:34,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1605675221, now seen corresponding path program 1 times [2024-10-31 21:55:34,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:34,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849355757] [2024-10-31 21:55:34,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:34,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:34,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:34,336 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-31 21:55:34,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:34,341 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-31 21:55:34,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:34,346 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-31 21:55:34,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:34,351 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-31 21:55:34,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:34,356 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-31 21:55:34,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:34,361 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-31 21:55:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:34,366 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-10-31 21:55:34,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:34,369 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-10-31 21:55:34,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:34,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849355757] [2024-10-31 21:55:34,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849355757] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:55:34,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38657151] [2024-10-31 21:55:34,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:34,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:55:34,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:55:34,373 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:55:34,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 21:55:34,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:34,441 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 21:55:34,443 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:55:34,566 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-10-31 21:55:34,566 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:55:34,698 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-10-31 21:55:34,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38657151] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:55:34,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:55:34,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 11 [2024-10-31 21:55:34,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450215031] [2024-10-31 21:55:34,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:55:34,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 21:55:34,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:34,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 21:55:34,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2024-10-31 21:55:34,701 INFO L87 Difference]: Start difference. First operand 118 states and 139 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 5 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2024-10-31 21:55:34,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:55:34,953 INFO L93 Difference]: Finished difference Result 194 states and 232 transitions. [2024-10-31 21:55:34,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-31 21:55:34,955 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 5 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) Word has length 49 [2024-10-31 21:55:34,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:55:34,957 INFO L225 Difference]: With dead ends: 194 [2024-10-31 21:55:34,958 INFO L226 Difference]: Without dead ends: 173 [2024-10-31 21:55:34,958 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2024-10-31 21:55:34,962 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 51 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 21:55:34,963 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 184 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 21:55:34,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-10-31 21:55:35,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 168. [2024-10-31 21:55:35,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 110 states have (on average 1.1818181818181819) internal successors, (130), 116 states have internal predecessors, (130), 37 states have call successors, (37), 21 states have call predecessors, (37), 20 states have return successors, (34), 30 states have call predecessors, (34), 34 states have call successors, (34) [2024-10-31 21:55:35,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 201 transitions. [2024-10-31 21:55:35,006 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 201 transitions. Word has length 49 [2024-10-31 21:55:35,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:55:35,006 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 201 transitions. [2024-10-31 21:55:35,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 5 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2024-10-31 21:55:35,007 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 201 transitions. [2024-10-31 21:55:35,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-10-31 21:55:35,011 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:55:35,012 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:55:35,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 21:55:35,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-31 21:55:35,213 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:55:35,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:35,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1800695307, now seen corresponding path program 1 times [2024-10-31 21:55:35,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:35,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748623723] [2024-10-31 21:55:35,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:35,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:35,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 21:55:35,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [450115414] [2024-10-31 21:55:35,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:35,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:55:35,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:55:35,265 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:55:35,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 21:55:35,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:35,342 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-31 21:55:35,347 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:55:35,764 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-10-31 21:55:35,765 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:55:37,919 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-10-31 21:55:37,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:37,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748623723] [2024-10-31 21:55:37,919 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 21:55:37,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450115414] [2024-10-31 21:55:37,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450115414] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:55:37,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 21:55:37,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2024-10-31 21:55:37,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447188654] [2024-10-31 21:55:37,920 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 21:55:37,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-31 21:55:37,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:37,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-31 21:55:37,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-10-31 21:55:37,922 INFO L87 Difference]: Start difference. First operand 168 states and 201 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 7 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 21:55:38,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:55:38,921 INFO L93 Difference]: Finished difference Result 261 states and 330 transitions. [2024-10-31 21:55:38,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-31 21:55:38,922 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 7 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 58 [2024-10-31 21:55:38,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:55:38,924 INFO L225 Difference]: With dead ends: 261 [2024-10-31 21:55:38,924 INFO L226 Difference]: Without dead ends: 223 [2024-10-31 21:55:38,925 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-10-31 21:55:38,926 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 47 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-31 21:55:38,926 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 239 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-31 21:55:38,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-10-31 21:55:38,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 210. [2024-10-31 21:55:38,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 141 states have (on average 1.2127659574468086) internal successors, (171), 148 states have internal predecessors, (171), 44 states have call successors, (44), 24 states have call predecessors, (44), 24 states have return successors, (42), 37 states have call predecessors, (42), 42 states have call successors, (42) [2024-10-31 21:55:38,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 257 transitions. [2024-10-31 21:55:38,985 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 257 transitions. Word has length 58 [2024-10-31 21:55:38,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:55:38,985 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 257 transitions. [2024-10-31 21:55:38,986 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 7 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 21:55:38,986 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 257 transitions. [2024-10-31 21:55:38,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-10-31 21:55:38,987 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:55:38,987 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:55:39,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-31 21:55:39,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:55:39,192 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:55:39,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:39,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1688778742, now seen corresponding path program 1 times [2024-10-31 21:55:39,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:39,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844675037] [2024-10-31 21:55:39,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:39,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:39,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 21:55:39,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1159971630] [2024-10-31 21:55:39,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:39,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:55:39,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:55:39,248 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:55:39,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 21:55:39,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:39,318 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-31 21:55:39,320 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:55:39,677 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-10-31 21:55:39,678 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:55:40,502 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-10-31 21:55:40,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:40,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844675037] [2024-10-31 21:55:40,502 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 21:55:40,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159971630] [2024-10-31 21:55:40,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159971630] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:55:40,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 21:55:40,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2024-10-31 21:55:40,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792247188] [2024-10-31 21:55:40,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 21:55:40,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-31 21:55:40,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:40,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-31 21:55:40,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2024-10-31 21:55:40,505 INFO L87 Difference]: Start difference. First operand 210 states and 257 transitions. Second operand has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-10-31 21:55:41,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:55:41,945 INFO L93 Difference]: Finished difference Result 262 states and 324 transitions. [2024-10-31 21:55:41,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-31 21:55:41,946 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 69 [2024-10-31 21:55:41,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:55:41,948 INFO L225 Difference]: With dead ends: 262 [2024-10-31 21:55:41,948 INFO L226 Difference]: Without dead ends: 218 [2024-10-31 21:55:41,949 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2024-10-31 21:55:41,949 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 25 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-10-31 21:55:41,950 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 264 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-10-31 21:55:41,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-10-31 21:55:42,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 193. [2024-10-31 21:55:42,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 130 states have (on average 1.1692307692307693) internal successors, (152), 135 states have internal predecessors, (152), 38 states have call successors, (38), 25 states have call predecessors, (38), 24 states have return successors, (36), 32 states have call predecessors, (36), 36 states have call successors, (36) [2024-10-31 21:55:42,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 226 transitions. [2024-10-31 21:55:42,017 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 226 transitions. Word has length 69 [2024-10-31 21:55:42,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:55:42,018 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 226 transitions. [2024-10-31 21:55:42,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-10-31 21:55:42,018 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 226 transitions. [2024-10-31 21:55:42,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-10-31 21:55:42,019 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:55:42,019 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:55:42,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-31 21:55:42,223 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:55:42,224 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:55:42,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:42,225 INFO L85 PathProgramCache]: Analyzing trace with hash -428937714, now seen corresponding path program 1 times [2024-10-31 21:55:42,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:42,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152390240] [2024-10-31 21:55:42,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:42,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:42,636 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-31 21:55:42,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:42,643 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-31 21:55:42,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:42,648 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-31 21:55:42,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:42,654 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-31 21:55:42,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:42,664 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-31 21:55:42,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:42,673 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-31 21:55:42,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:42,683 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-10-31 21:55:42,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:42,690 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-10-31 21:55:42,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:42,718 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-10-31 21:55:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:42,746 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-10-31 21:55:42,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:42,758 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-10-31 21:55:42,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:42,769 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-10-31 21:55:42,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:42,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152390240] [2024-10-31 21:55:42,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152390240] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:55:42,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896322280] [2024-10-31 21:55:42,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:42,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:55:42,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:55:42,818 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:55:42,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-31 21:55:42,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:42,893 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-31 21:55:42,896 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:55:43,140 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-10-31 21:55:43,140 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:55:43,731 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-10-31 21:55:43,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896322280] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:55:43,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:55:43,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2024-10-31 21:55:43,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753747401] [2024-10-31 21:55:43,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:55:43,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 21:55:43,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:43,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 21:55:43,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-10-31 21:55:43,734 INFO L87 Difference]: Start difference. First operand 193 states and 226 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 12 states have internal predecessors, (51), 8 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2024-10-31 21:55:44,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:55:44,117 INFO L93 Difference]: Finished difference Result 231 states and 267 transitions. [2024-10-31 21:55:44,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-31 21:55:44,118 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 12 states have internal predecessors, (51), 8 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) Word has length 74 [2024-10-31 21:55:44,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:55:44,119 INFO L225 Difference]: With dead ends: 231 [2024-10-31 21:55:44,119 INFO L226 Difference]: Without dead ends: 165 [2024-10-31 21:55:44,120 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2024-10-31 21:55:44,121 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 13 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 21:55:44,121 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 308 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 21:55:44,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-10-31 21:55:44,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 160. [2024-10-31 21:55:44,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 108 states have (on average 1.1574074074074074) internal successors, (125), 111 states have internal predecessors, (125), 31 states have call successors, (31), 20 states have call predecessors, (31), 20 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2024-10-31 21:55:44,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 186 transitions. [2024-10-31 21:55:44,180 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 186 transitions. Word has length 74 [2024-10-31 21:55:44,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:55:44,180 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 186 transitions. [2024-10-31 21:55:44,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 12 states have internal predecessors, (51), 8 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2024-10-31 21:55:44,181 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 186 transitions. [2024-10-31 21:55:44,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-10-31 21:55:44,182 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:55:44,182 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:55:44,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-31 21:55:44,382 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-31 21:55:44,383 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:55:44,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:44,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1496336062, now seen corresponding path program 1 times [2024-10-31 21:55:44,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:44,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728699679] [2024-10-31 21:55:44,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:44,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:44,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:44,562 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-31 21:55:44,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:44,567 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-31 21:55:44,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:44,571 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-31 21:55:44,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:44,575 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-31 21:55:44,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:44,579 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-31 21:55:44,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:44,583 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-31 21:55:44,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:44,587 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-10-31 21:55:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:44,591 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-10-31 21:55:44,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:44,596 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-10-31 21:55:44,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:44,601 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-10-31 21:55:44,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:44,605 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-10-31 21:55:44,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:44,609 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-10-31 21:55:44,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:44,613 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-10-31 21:55:44,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:44,616 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 26 proven. 44 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-10-31 21:55:44,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:44,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728699679] [2024-10-31 21:55:44,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728699679] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:55:44,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327788885] [2024-10-31 21:55:44,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:44,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:55:44,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:55:44,619 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:55:44,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-31 21:55:44,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:44,694 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-31 21:55:44,696 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:55:44,826 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 72 proven. 260 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-10-31 21:55:44,826 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:55:44,977 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 26 proven. 44 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-10-31 21:55:44,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327788885] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:55:44,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:55:44,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 10 [2024-10-31 21:55:44,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286869916] [2024-10-31 21:55:44,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:55:44,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 21:55:44,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:44,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 21:55:44,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2024-10-31 21:55:44,980 INFO L87 Difference]: Start difference. First operand 160 states and 186 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2024-10-31 21:55:45,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:55:45,155 INFO L93 Difference]: Finished difference Result 218 states and 264 transitions. [2024-10-31 21:55:45,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-31 21:55:45,156 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) Word has length 87 [2024-10-31 21:55:45,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:55:45,157 INFO L225 Difference]: With dead ends: 218 [2024-10-31 21:55:45,157 INFO L226 Difference]: Without dead ends: 162 [2024-10-31 21:55:45,158 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 192 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2024-10-31 21:55:45,159 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 11 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 21:55:45,159 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 117 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 21:55:45,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-10-31 21:55:45,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2024-10-31 21:55:45,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 113 states have internal predecessors, (127), 31 states have call successors, (31), 20 states have call predecessors, (31), 20 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2024-10-31 21:55:45,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 188 transitions. [2024-10-31 21:55:45,217 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 188 transitions. Word has length 87 [2024-10-31 21:55:45,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:55:45,217 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 188 transitions. [2024-10-31 21:55:45,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2024-10-31 21:55:45,218 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 188 transitions. [2024-10-31 21:55:45,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-10-31 21:55:45,219 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:55:45,219 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-10-31 21:55:45,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-31 21:55:45,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-31 21:55:45,424 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:55:45,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:45,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1611798954, now seen corresponding path program 2 times [2024-10-31 21:55:45,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:45,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005306505] [2024-10-31 21:55:45,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:45,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:45,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:45,661 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-31 21:55:45,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:45,665 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-31 21:55:45,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:45,668 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-31 21:55:45,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:45,672 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-31 21:55:45,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:45,675 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-31 21:55:45,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:45,678 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-31 21:55:45,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:45,683 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-10-31 21:55:45,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:45,686 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-10-31 21:55:45,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:45,690 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-10-31 21:55:45,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:45,694 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-10-31 21:55:45,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:45,701 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-10-31 21:55:45,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:45,706 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-10-31 21:55:45,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:45,711 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-10-31 21:55:45,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:45,715 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 50 proven. 6 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-10-31 21:55:45,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:45,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005306505] [2024-10-31 21:55:45,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005306505] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:55:45,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62731510] [2024-10-31 21:55:45,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 21:55:45,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:55:45,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:55:45,720 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:55:45,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-31 21:55:45,813 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 21:55:45,813 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:55:45,815 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-31 21:55:45,818 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:55:45,989 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 322 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-31 21:55:45,989 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:55:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-10-31 21:55:46,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62731510] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:55:46,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:55:46,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 11 [2024-10-31 21:55:46,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881350692] [2024-10-31 21:55:46,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:55:46,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 21:55:46,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:46,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 21:55:46,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-10-31 21:55:46,153 INFO L87 Difference]: Start difference. First operand 162 states and 188 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 6 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2024-10-31 21:55:46,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:55:46,457 INFO L93 Difference]: Finished difference Result 209 states and 246 transitions. [2024-10-31 21:55:46,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 21:55:46,458 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 6 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) Word has length 90 [2024-10-31 21:55:46,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:55:46,460 INFO L225 Difference]: With dead ends: 209 [2024-10-31 21:55:46,460 INFO L226 Difference]: Without dead ends: 155 [2024-10-31 21:55:46,461 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 198 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-10-31 21:55:46,461 INFO L432 NwaCegarLoop]: 81 mSDtfsCounter, 28 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 21:55:46,462 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 283 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 21:55:46,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-10-31 21:55:46,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 145. [2024-10-31 21:55:46,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 98 states have (on average 1.0816326530612246) internal successors, (106), 101 states have internal predecessors, (106), 26 states have call successors, (26), 20 states have call predecessors, (26), 20 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2024-10-31 21:55:46,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 157 transitions. [2024-10-31 21:55:46,510 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 157 transitions. Word has length 90 [2024-10-31 21:55:46,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:55:46,511 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 157 transitions. [2024-10-31 21:55:46,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 6 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2024-10-31 21:55:46,511 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 157 transitions. [2024-10-31 21:55:46,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-10-31 21:55:46,512 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:55:46,512 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:55:46,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-31 21:55:46,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-31 21:55:46,715 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:55:46,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:46,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1610071076, now seen corresponding path program 1 times [2024-10-31 21:55:46,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:46,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368425826] [2024-10-31 21:55:46,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:46,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:46,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 21:55:46,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2133230099] [2024-10-31 21:55:46,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:46,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:55:46,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:55:46,764 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:55:46,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_040d7c78-4f91-4561-a24c-a5e033b8475b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-31 21:55:46,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:46,850 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-10-31 21:55:46,853 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:55:47,479 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-10-31 21:55:47,479 INFO L311 TraceCheckSpWp]: Computing backward predicates...