./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB --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 f5697d76d3e5ae232d0e056ee307ac88ca38e983a94c4765bc5d51f77e79d2f7 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 05:18:43,388 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 05:18:43,475 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 05:18:43,485 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 05:18:43,485 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 05:18:43,529 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 05:18:43,531 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 05:18:43,532 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 05:18:43,532 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 05:18:43,532 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 05:18:43,533 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 05:18:43,533 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 05:18:43,534 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 05:18:43,534 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 05:18:43,535 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 05:18:43,535 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 05:18:43,535 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 05:18:43,535 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 05:18:43,535 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 05:18:43,536 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 05:18:43,536 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 05:18:43,536 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 05:18:43,536 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 05:18:43,536 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 05:18:43,536 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 05:18:43,536 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 05:18:43,536 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 05:18:43,537 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 05:18:43,537 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 05:18:43,537 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:18:43,537 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:18:43,537 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:18:43,538 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:18:43,538 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 05:18:43,538 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:18:43,538 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:18:43,538 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:18:43,539 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:18:43,539 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 05:18:43,539 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 05:18:43,539 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 05:18:43,539 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 05:18:43,539 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 05:18:43,539 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 05:18:43,539 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 05:18:43,540 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 05:18:43,540 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 05:18:43,540 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 05:18:43,540 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB 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 -> f5697d76d3e5ae232d0e056ee307ac88ca38e983a94c4765bc5d51f77e79d2f7 [2024-11-28 05:18:43,848 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 05:18:43,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 05:18:43,859 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 05:18:43,860 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 05:18:43,861 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 05:18:43,862 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.c [2024-11-28 05:18:46,774 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/data/611bfefe5/23a142a89335462c82dc0b1b09743aca/FLAG0c8e5e0a9 [2024-11-28 05:18:47,047 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 05:18:47,048 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.c [2024-11-28 05:18:47,054 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/data/611bfefe5/23a142a89335462c82dc0b1b09743aca/FLAG0c8e5e0a9 [2024-11-28 05:18:47,067 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/data/611bfefe5/23a142a89335462c82dc0b1b09743aca [2024-11-28 05:18:47,069 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 05:18:47,070 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 05:18:47,071 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 05:18:47,071 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 05:18:47,075 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 05:18:47,075 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:18:47" (1/1) ... [2024-11-28 05:18:47,076 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fc9f6c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:18:47, skipping insertion in model container [2024-11-28 05:18:47,076 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:18:47" (1/1) ... [2024-11-28 05:18:47,091 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 05:18:47,267 WARN L250 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_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.c[490,503] [2024-11-28 05:18:47,300 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:18:47,310 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 05:18:47,324 WARN L250 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_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.c[490,503] [2024-11-28 05:18:47,342 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:18:47,358 INFO L204 MainTranslator]: Completed translation [2024-11-28 05:18:47,359 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:18:47 WrapperNode [2024-11-28 05:18:47,361 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 05:18:47,362 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 05:18:47,362 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 05:18:47,362 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 05:18:47,374 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:18:47" (1/1) ... [2024-11-28 05:18:47,380 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:18:47" (1/1) ... [2024-11-28 05:18:47,404 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2024-11-28 05:18:47,407 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 05:18:47,408 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 05:18:47,408 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 05:18:47,408 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 05:18:47,418 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:18:47" (1/1) ... [2024-11-28 05:18:47,418 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:18:47" (1/1) ... [2024-11-28 05:18:47,425 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:18:47" (1/1) ... [2024-11-28 05:18:47,446 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-28 05:18:47,446 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:18:47" (1/1) ... [2024-11-28 05:18:47,446 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:18:47" (1/1) ... [2024-11-28 05:18:47,449 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:18:47" (1/1) ... [2024-11-28 05:18:47,450 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:18:47" (1/1) ... [2024-11-28 05:18:47,453 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:18:47" (1/1) ... [2024-11-28 05:18:47,454 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:18:47" (1/1) ... [2024-11-28 05:18:47,455 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:18:47" (1/1) ... [2024-11-28 05:18:47,456 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 05:18:47,457 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 05:18:47,457 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 05:18:47,457 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 05:18:47,458 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:18:47" (1/1) ... [2024-11-28 05:18:47,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:18:47,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:18:47,491 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 05:18:47,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 05:18:47,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 05:18:47,521 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-28 05:18:47,521 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-28 05:18:47,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 05:18:47,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 05:18:47,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 05:18:47,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-28 05:18:47,522 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-28 05:18:47,572 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 05:18:47,573 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 05:18:47,743 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-28 05:18:47,743 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 05:18:47,753 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 05:18:47,755 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-28 05:18:47,756 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:18:47 BoogieIcfgContainer [2024-11-28 05:18:47,756 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 05:18:47,759 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 05:18:47,759 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 05:18:47,766 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 05:18:47,766 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:18:47" (1/3) ... [2024-11-28 05:18:47,767 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@355a19d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:18:47, skipping insertion in model container [2024-11-28 05:18:47,767 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:18:47" (2/3) ... [2024-11-28 05:18:47,768 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@355a19d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:18:47, skipping insertion in model container [2024-11-28 05:18:47,769 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:18:47" (3/3) ... [2024-11-28 05:18:47,771 INFO L128 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound100.c [2024-11-28 05:18:47,787 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 05:18:47,789 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd2-ll_valuebound100.c that has 3 procedures, 33 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-28 05:18:47,864 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 05:18:47,879 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;@5d04d096, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 05:18:47,880 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 05:18:47,884 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-28 05:18:47,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-28 05:18:47,892 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:18:47,893 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:18:47,893 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:18:47,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:18:47,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1694190779, now seen corresponding path program 1 times [2024-11-28 05:18:47,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:18:47,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921899187] [2024-11-28 05:18:47,909 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:18:47,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:18:47,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:18:48,081 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-28 05:18:48,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:18:48,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921899187] [2024-11-28 05:18:48,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921899187] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:18:48,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165404616] [2024-11-28 05:18:48,086 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:18:48,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:18:48,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:18:48,089 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:18:48,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 05:18:48,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:18:48,212 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-28 05:18:48,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:18:48,241 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-28 05:18:48,242 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:18:48,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165404616] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:18:48,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:18:48,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-28 05:18:48,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101032857] [2024-11-28 05:18:48,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:18:48,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-28 05:18:48,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:18:48,272 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-28 05:18:48,274 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 05:18:48,276 INFO L87 Difference]: Start difference. First operand has 33 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-28 05:18:48,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:18:48,305 INFO L93 Difference]: Finished difference Result 63 states and 108 transitions. [2024-11-28 05:18:48,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-28 05:18:48,307 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2024-11-28 05:18:48,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:18:48,314 INFO L225 Difference]: With dead ends: 63 [2024-11-28 05:18:48,314 INFO L226 Difference]: Without dead ends: 29 [2024-11-28 05:18:48,317 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 05:18:48,320 INFO L435 NwaCegarLoop]: 44 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, 44 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 [2024-11-28 05:18:48,322 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 05:18:48,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-28 05:18:48,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-28 05:18:48,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 16 states have internal predecessors, (17), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-28 05:18:48,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2024-11-28 05:18:48,355 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 39 [2024-11-28 05:18:48,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:18:48,355 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2024-11-28 05:18:48,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-28 05:18:48,356 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2024-11-28 05:18:48,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-28 05:18:48,357 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:18:48,357 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:18:48,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 05:18:48,562 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-28 05:18:48,562 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:18:48,563 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:18:48,563 INFO L85 PathProgramCache]: Analyzing trace with hash -979027133, now seen corresponding path program 1 times [2024-11-28 05:18:48,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:18:48,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713225858] [2024-11-28 05:18:48,563 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:18:48,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:18:48,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:18:48,880 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 05:18:48,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:18:48,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713225858] [2024-11-28 05:18:48,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713225858] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:18:48,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811371686] [2024-11-28 05:18:48,881 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:18:48,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:18:48,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:18:48,883 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:18:48,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 05:18:48,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:18:48,982 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 05:18:48,985 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:18:49,270 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 05:18:49,271 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:18:49,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811371686] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:18:49,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:18:49,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 11 [2024-11-28 05:18:49,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002745025] [2024-11-28 05:18:49,457 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:18:49,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 05:18:49,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:18:49,458 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 05:18:49,459 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-28 05:18:49,459 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 11 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-28 05:18:49,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:18:49,752 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2024-11-28 05:18:49,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 05:18:49,752 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 39 [2024-11-28 05:18:49,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:18:49,753 INFO L225 Difference]: With dead ends: 48 [2024-11-28 05:18:49,754 INFO L226 Difference]: Without dead ends: 40 [2024-11-28 05:18:49,754 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-11-28 05:18:49,755 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 24 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:18:49,755 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 178 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:18:49,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-28 05:18:49,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2024-11-28 05:18:49,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-28 05:18:49,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 54 transitions. [2024-11-28 05:18:49,768 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 54 transitions. Word has length 39 [2024-11-28 05:18:49,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:18:49,768 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 54 transitions. [2024-11-28 05:18:49,768 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-28 05:18:49,768 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 54 transitions. [2024-11-28 05:18:49,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-28 05:18:49,769 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:18:49,770 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:18:49,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 05:18:49,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:18:49,974 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:18:49,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:18:49,974 INFO L85 PathProgramCache]: Analyzing trace with hash -977418419, now seen corresponding path program 1 times [2024-11-28 05:18:49,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:18:49,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901305091] [2024-11-28 05:18:49,975 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:18:49,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:18:50,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 05:18:50,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [483272928] [2024-11-28 05:18:50,012 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:18:50,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:18:50,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:18:50,014 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:18:50,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 05:18:50,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:18:50,091 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 05:18:50,093 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:18:50,144 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-28 05:18:50,146 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:18:50,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:18:50,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901305091] [2024-11-28 05:18:50,147 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:18:50,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483272928] [2024-11-28 05:18:50,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483272928] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:18:50,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:18:50,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:18:50,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288819013] [2024-11-28 05:18:50,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:18:50,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:18:50,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:18:50,150 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:18:50,151 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:18:50,151 INFO L87 Difference]: Start difference. First operand 39 states and 54 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 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) [2024-11-28 05:18:50,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:18:50,222 INFO L93 Difference]: Finished difference Result 56 states and 80 transitions. [2024-11-28 05:18:50,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:18:50,223 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 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 39 [2024-11-28 05:18:50,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:18:50,225 INFO L225 Difference]: With dead ends: 56 [2024-11-28 05:18:50,225 INFO L226 Difference]: Without dead ends: 54 [2024-11-28 05:18:50,225 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 05:18:50,226 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:18:50,226 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 128 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 05:18:50,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-28 05:18:50,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2024-11-28 05:18:50,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 25 states have internal predecessors, (26), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-28 05:18:50,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2024-11-28 05:18:50,254 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 39 [2024-11-28 05:18:50,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:18:50,254 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2024-11-28 05:18:50,254 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 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) [2024-11-28 05:18:50,255 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2024-11-28 05:18:50,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-28 05:18:50,256 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:18:50,256 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:18:50,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 05:18:50,456 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:18:50,456 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:18:50,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:18:50,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1981253298, now seen corresponding path program 1 times [2024-11-28 05:18:50,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:18:50,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485859184] [2024-11-28 05:18:50,457 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:18:50,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:18:50,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 05:18:50,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2096765923] [2024-11-28 05:18:50,486 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:18:50,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:18:50,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:18:50,488 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:18:50,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 05:18:50,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:18:50,552 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 05:18:50,555 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:18:50,649 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-28 05:18:50,649 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:18:50,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:18:50,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485859184] [2024-11-28 05:18:50,649 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:18:50,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096765923] [2024-11-28 05:18:50,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096765923] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:18:50,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:18:50,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:18:50,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862682490] [2024-11-28 05:18:50,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:18:50,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:18:50,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:18:50,651 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:18:50,651 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:18:50,651 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 05:18:50,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:18:50,713 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2024-11-28 05:18:50,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:18:50,714 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2024-11-28 05:18:50,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:18:50,716 INFO L225 Difference]: With dead ends: 52 [2024-11-28 05:18:50,717 INFO L226 Difference]: Without dead ends: 50 [2024-11-28 05:18:50,717 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 05:18:50,718 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:18:50,718 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 138 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 05:18:50,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-28 05:18:50,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2024-11-28 05:18:50,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 25 states have (on average 1.16) internal successors, (29), 28 states have internal predecessors, (29), 18 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-28 05:18:50,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2024-11-28 05:18:50,740 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 44 [2024-11-28 05:18:50,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:18:50,741 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2024-11-28 05:18:50,741 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 05:18:50,741 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2024-11-28 05:18:50,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-28 05:18:50,742 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:18:50,742 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:18:50,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 05:18:50,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:18:50,947 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:18:50,947 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:18:50,947 INFO L85 PathProgramCache]: Analyzing trace with hash -178384046, now seen corresponding path program 1 times [2024-11-28 05:18:50,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:18:50,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388560641] [2024-11-28 05:18:50,948 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:18:50,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:18:50,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 05:18:50,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2050857262] [2024-11-28 05:18:50,980 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:18:50,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:18:50,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:18:50,982 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:18:50,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 05:18:51,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:18:51,067 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 05:18:51,070 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:18:51,269 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-28 05:18:51,269 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:18:51,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:18:51,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388560641] [2024-11-28 05:18:51,269 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:18:51,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050857262] [2024-11-28 05:18:51,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050857262] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:18:51,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:18:51,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:18:51,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733762957] [2024-11-28 05:18:51,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:18:51,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:18:51,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:18:51,271 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:18:51,271 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:18:51,272 INFO L87 Difference]: Start difference. First operand 49 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-28 05:18:51,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:18:51,365 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2024-11-28 05:18:51,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:18:51,366 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 54 [2024-11-28 05:18:51,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:18:51,367 INFO L225 Difference]: With dead ends: 56 [2024-11-28 05:18:51,367 INFO L226 Difference]: Without dead ends: 54 [2024-11-28 05:18:51,367 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 05:18:51,368 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 5 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:18:51,368 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 125 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:18:51,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-28 05:18:51,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2024-11-28 05:18:51,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-28 05:18:51,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2024-11-28 05:18:51,391 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 54 [2024-11-28 05:18:51,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:18:51,393 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2024-11-28 05:18:51,393 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-28 05:18:51,393 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2024-11-28 05:18:51,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-28 05:18:51,394 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:18:51,394 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:18:51,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 05:18:51,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:18:51,595 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:18:51,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:18:51,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1371475927, now seen corresponding path program 1 times [2024-11-28 05:18:51,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:18:51,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747834291] [2024-11-28 05:18:51,596 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:18:51,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:18:51,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 05:18:51,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [476421643] [2024-11-28 05:18:51,656 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:18:51,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:18:51,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:18:51,666 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:18:51,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 05:18:51,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:18:51,731 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 05:18:51,733 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:18:51,832 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-28 05:18:51,833 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:18:51,985 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-28 05:18:51,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:18:51,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747834291] [2024-11-28 05:18:51,985 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:18:51,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476421643] [2024-11-28 05:18:51,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476421643] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:18:51,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:18:51,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2024-11-28 05:18:51,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342442816] [2024-11-28 05:18:51,985 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:18:51,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 05:18:51,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:18:51,986 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 05:18:51,986 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-28 05:18:51,987 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 7 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-28 05:18:52,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:18:52,114 INFO L93 Difference]: Finished difference Result 79 states and 110 transitions. [2024-11-28 05:18:52,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 05:18:52,115 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2024-11-28 05:18:52,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:18:52,116 INFO L225 Difference]: With dead ends: 79 [2024-11-28 05:18:52,116 INFO L226 Difference]: Without dead ends: 77 [2024-11-28 05:18:52,117 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-28 05:18:52,117 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:18:52,118 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 144 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:18:52,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-28 05:18:52,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 51. [2024-11-28 05:18:52,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-28 05:18:52,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2024-11-28 05:18:52,136 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 60 [2024-11-28 05:18:52,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:18:52,137 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2024-11-28 05:18:52,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-28 05:18:52,137 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2024-11-28 05:18:52,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-28 05:18:52,138 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:18:52,138 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:18:52,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 05:18:52,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-28 05:18:52,339 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:18:52,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:18:52,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1875725832, now seen corresponding path program 1 times [2024-11-28 05:18:52,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:18:52,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311126395] [2024-11-28 05:18:52,340 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:18:52,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:18:52,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:18:52,644 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-11-28 05:18:52,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:18:52,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311126395] [2024-11-28 05:18:52,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311126395] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:18:52,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919793784] [2024-11-28 05:18:52,646 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:18:52,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:18:52,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:18:52,648 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:18:52,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 05:18:52,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:18:52,722 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 05:18:52,724 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:18:52,793 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-11-28 05:18:52,794 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:18:52,932 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-11-28 05:18:52,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919793784] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:18:52,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:18:52,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-11-28 05:18:52,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085648055] [2024-11-28 05:18:52,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:18:52,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 05:18:52,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:18:52,935 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 05:18:52,935 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-28 05:18:52,935 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2024-11-28 05:18:53,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:18:53,200 INFO L93 Difference]: Finished difference Result 91 states and 131 transitions. [2024-11-28 05:18:53,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 05:18:53,201 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 62 [2024-11-28 05:18:53,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:18:53,203 INFO L225 Difference]: With dead ends: 91 [2024-11-28 05:18:53,203 INFO L226 Difference]: Without dead ends: 83 [2024-11-28 05:18:53,203 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 116 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-11-28 05:18:53,204 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 20 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:18:53,204 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 298 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:18:53,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-28 05:18:53,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 75. [2024-11-28 05:18:53,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2024-11-28 05:18:53,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 108 transitions. [2024-11-28 05:18:53,236 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 108 transitions. Word has length 62 [2024-11-28 05:18:53,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:18:53,236 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 108 transitions. [2024-11-28 05:18:53,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2024-11-28 05:18:53,237 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 108 transitions. [2024-11-28 05:18:53,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-28 05:18:53,238 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:18:53,238 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:18:53,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 05:18:53,441 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-28 05:18:53,442 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:18:53,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:18:53,442 INFO L85 PathProgramCache]: Analyzing trace with hash -329947379, now seen corresponding path program 1 times [2024-11-28 05:18:53,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:18:53,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634391217] [2024-11-28 05:18:53,442 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:18:53,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:18:53,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 05:18:53,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1330344183] [2024-11-28 05:18:53,493 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:18:53,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:18:53,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:18:53,496 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:18:53,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 05:18:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:18:53,568 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 05:18:53,571 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:18:53,731 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-28 05:18:53,732 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:18:53,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:18:53,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634391217] [2024-11-28 05:18:53,781 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:18:53,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330344183] [2024-11-28 05:18:53,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330344183] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:18:53,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:18:53,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2024-11-28 05:18:53,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900394453] [2024-11-28 05:18:53,782 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 05:18:53,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 05:18:53,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:18:53,783 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 05:18:53,783 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-28 05:18:53,783 INFO L87 Difference]: Start difference. First operand 75 states and 108 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-28 05:18:53,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:18:53,936 INFO L93 Difference]: Finished difference Result 105 states and 154 transitions. [2024-11-28 05:18:53,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 05:18:53,937 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 67 [2024-11-28 05:18:53,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:18:53,940 INFO L225 Difference]: With dead ends: 105 [2024-11-28 05:18:53,940 INFO L226 Difference]: Without dead ends: 102 [2024-11-28 05:18:53,941 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-28 05:18:53,941 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 7 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:18:53,942 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 182 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:18:53,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-28 05:18:53,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2024-11-28 05:18:53,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 48 states have internal predecessors, (59), 45 states have call successors, (45), 7 states have call predecessors, (45), 7 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-11-28 05:18:53,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 147 transitions. [2024-11-28 05:18:53,993 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 147 transitions. Word has length 67 [2024-11-28 05:18:53,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:18:53,996 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 147 transitions. [2024-11-28 05:18:53,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-28 05:18:53,996 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 147 transitions. [2024-11-28 05:18:53,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-28 05:18:53,997 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:18:53,997 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:18:54,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 05:18:54,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:18:54,198 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:18:54,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:18:54,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1881855666, now seen corresponding path program 2 times [2024-11-28 05:18:54,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:18:54,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2793769] [2024-11-28 05:18:54,199 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:18:54,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:18:54,234 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:18:54,234 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:18:54,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [207439262] [2024-11-28 05:18:54,238 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:18:54,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:18:54,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:18:54,242 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:18:54,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 05:18:54,307 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:18:54,307 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:18:54,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 05:18:54,312 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:18:54,509 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-28 05:18:54,509 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:18:54,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:18:54,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2793769] [2024-11-28 05:18:54,560 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:18:54,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207439262] [2024-11-28 05:18:54,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207439262] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:18:54,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:18:54,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2024-11-28 05:18:54,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496574491] [2024-11-28 05:18:54,560 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 05:18:54,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 05:18:54,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:18:54,561 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 05:18:54,561 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-28 05:18:54,561 INFO L87 Difference]: Start difference. First operand 99 states and 147 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-28 05:18:54,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:18:54,756 INFO L93 Difference]: Finished difference Result 111 states and 157 transitions. [2024-11-28 05:18:54,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 05:18:54,758 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 72 [2024-11-28 05:18:54,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:18:54,759 INFO L225 Difference]: With dead ends: 111 [2024-11-28 05:18:54,759 INFO L226 Difference]: Without dead ends: 109 [2024-11-28 05:18:54,759 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-28 05:18:54,760 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 10 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:18:54,760 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 196 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:18:54,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-28 05:18:54,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2024-11-28 05:18:54,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 52 states have (on average 1.25) internal successors, (65), 54 states have internal predecessors, (65), 45 states have call successors, (45), 9 states have call predecessors, (45), 9 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-11-28 05:18:54,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 153 transitions. [2024-11-28 05:18:54,803 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 153 transitions. Word has length 72 [2024-11-28 05:18:54,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:18:54,803 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 153 transitions. [2024-11-28 05:18:54,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-28 05:18:54,804 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 153 transitions. [2024-11-28 05:18:54,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-28 05:18:54,804 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:18:54,805 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:18:54,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 05:18:55,005 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:18:55,005 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:18:55,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:18:55,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1928364563, now seen corresponding path program 3 times [2024-11-28 05:18:55,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:18:55,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407857882] [2024-11-28 05:18:55,006 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:18:55,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:18:55,061 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-28 05:18:55,062 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:18:55,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [423805629] [2024-11-28 05:18:55,063 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:18:55,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:18:55,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:18:55,067 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:18:55,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 05:18:55,133 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 05:18:55,133 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:18:55,137 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-28 05:18:55,139 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:18:55,915 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 43 proven. 18 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2024-11-28 05:18:55,915 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:18:56,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:18:56,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407857882] [2024-11-28 05:18:56,862 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:18:56,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423805629] [2024-11-28 05:18:56,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423805629] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:18:56,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:18:56,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-11-28 05:18:56,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645674133] [2024-11-28 05:18:56,864 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 05:18:56,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 05:18:56,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:18:56,865 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 05:18:56,866 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2024-11-28 05:18:56,866 INFO L87 Difference]: Start difference. First operand 107 states and 153 transitions. Second operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-11-28 05:18:57,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:18:57,382 INFO L93 Difference]: Finished difference Result 115 states and 160 transitions. [2024-11-28 05:18:57,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 05:18:57,384 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 77 [2024-11-28 05:18:57,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:18:57,385 INFO L225 Difference]: With dead ends: 115 [2024-11-28 05:18:57,385 INFO L226 Difference]: Without dead ends: 113 [2024-11-28 05:18:57,386 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2024-11-28 05:18:57,387 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 25 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:18:57,387 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 165 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 05:18:57,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-28 05:18:57,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2024-11-28 05:18:57,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 57 states have internal predecessors, (68), 45 states have call successors, (45), 10 states have call predecessors, (45), 10 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-11-28 05:18:57,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 156 transitions. [2024-11-28 05:18:57,415 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 156 transitions. Word has length 77 [2024-11-28 05:18:57,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:18:57,415 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 156 transitions. [2024-11-28 05:18:57,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-11-28 05:18:57,416 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 156 transitions. [2024-11-28 05:18:57,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-28 05:18:57,417 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:18:57,417 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:18:57,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 05:18:57,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-28 05:18:57,621 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:18:57,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:18:57,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1939074476, now seen corresponding path program 1 times [2024-11-28 05:18:57,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:18:57,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464920117] [2024-11-28 05:18:57,621 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:18:57,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:18:57,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 05:18:57,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1310510147] [2024-11-28 05:18:57,642 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:18:57,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:18:57,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:18:57,644 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:18:57,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 05:18:57,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:18:57,720 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-28 05:18:57,722 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:18:58,305 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2024-11-28 05:18:58,305 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:18:58,751 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-11-28 05:18:58,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:18:58,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464920117] [2024-11-28 05:18:58,751 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:18:58,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310510147] [2024-11-28 05:18:58,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310510147] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:18:58,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:18:58,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-11-28 05:18:58,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148091749] [2024-11-28 05:18:58,752 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:18:58,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 05:18:58,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:18:58,753 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 05:18:58,753 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-11-28 05:18:58,754 INFO L87 Difference]: Start difference. First operand 111 states and 156 transitions. Second operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2024-11-28 05:19:01,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:01,627 INFO L93 Difference]: Finished difference Result 195 states and 303 transitions. [2024-11-28 05:19:01,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 05:19:01,628 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 83 [2024-11-28 05:19:01,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:01,630 INFO L225 Difference]: With dead ends: 195 [2024-11-28 05:19:01,631 INFO L226 Difference]: Without dead ends: 191 [2024-11-28 05:19:01,632 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2024-11-28 05:19:01,632 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 55 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:01,633 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 477 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-28 05:19:01,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-11-28 05:19:01,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 188. [2024-11-28 05:19:01,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 81 states have (on average 1.3333333333333333) internal successors, (108), 84 states have internal predecessors, (108), 94 states have call successors, (94), 12 states have call predecessors, (94), 12 states have return successors, (92), 91 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-28 05:19:01,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 294 transitions. [2024-11-28 05:19:01,710 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 294 transitions. Word has length 83 [2024-11-28 05:19:01,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:01,711 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 294 transitions. [2024-11-28 05:19:01,711 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2024-11-28 05:19:01,711 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 294 transitions. [2024-11-28 05:19:01,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-28 05:19:01,713 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:01,713 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:01,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-28 05:19:01,914 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:01,914 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:01,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:01,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1291235246, now seen corresponding path program 4 times [2024-11-28 05:19:01,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:01,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381847666] [2024-11-28 05:19:01,915 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:19:01,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:01,937 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:19:01,937 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:19:02,052 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2024-11-28 05:19:02,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:02,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381847666] [2024-11-28 05:19:02,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381847666] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:19:02,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:19:02,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:19:02,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101918588] [2024-11-28 05:19:02,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:19:02,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:19:02,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:02,054 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:19:02,054 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:19:02,054 INFO L87 Difference]: Start difference. First operand 188 states and 294 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-28 05:19:02,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:02,189 INFO L93 Difference]: Finished difference Result 233 states and 362 transitions. [2024-11-28 05:19:02,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 05:19:02,193 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 90 [2024-11-28 05:19:02,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:02,194 INFO L225 Difference]: With dead ends: 233 [2024-11-28 05:19:02,195 INFO L226 Difference]: Without dead ends: 171 [2024-11-28 05:19:02,195 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-28 05:19:02,196 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 4 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:02,196 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 157 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:19:02,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-11-28 05:19:02,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 162. [2024-11-28 05:19:02,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 74 states have internal predecessors, (88), 78 states have call successors, (78), 12 states have call predecessors, (78), 12 states have return successors, (76), 75 states have call predecessors, (76), 76 states have call successors, (76) [2024-11-28 05:19:02,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 242 transitions. [2024-11-28 05:19:02,265 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 242 transitions. Word has length 90 [2024-11-28 05:19:02,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:02,266 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 242 transitions. [2024-11-28 05:19:02,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-28 05:19:02,266 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 242 transitions. [2024-11-28 05:19:02,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-28 05:19:02,267 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:02,267 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:02,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-28 05:19:02,268 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:02,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:02,268 INFO L85 PathProgramCache]: Analyzing trace with hash -557243959, now seen corresponding path program 1 times [2024-11-28 05:19:02,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:02,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518052638] [2024-11-28 05:19:02,268 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:02,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:02,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 05:19:02,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [25029567] [2024-11-28 05:19:02,295 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:02,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:02,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:19:02,297 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:19:02,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 05:19:02,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:02,386 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-28 05:19:02,388 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:19:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 57 proven. 24 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2024-11-28 05:19:03,346 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:19:04,848 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 51 proven. 15 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2024-11-28 05:19:04,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:04,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518052638] [2024-11-28 05:19:04,849 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:19:04,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25029567] [2024-11-28 05:19:04,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25029567] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:19:04,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:19:04,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2024-11-28 05:19:04,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142255981] [2024-11-28 05:19:04,849 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:19:04,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 05:19:04,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:04,851 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 05:19:04,851 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2024-11-28 05:19:04,851 INFO L87 Difference]: Start difference. First operand 162 states and 242 transitions. Second operand has 24 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2024-11-28 05:19:14,537 WARN L286 SmtUtils]: Spent 8.71s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 05:19:23,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 05:19:25,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 05:19:29,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 05:19:35,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 05:19:36,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:36,604 INFO L93 Difference]: Finished difference Result 201 states and 302 transitions. [2024-11-28 05:19:36,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-28 05:19:36,605 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) Word has length 98 [2024-11-28 05:19:36,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:36,606 INFO L225 Difference]: With dead ends: 201 [2024-11-28 05:19:36,606 INFO L226 Difference]: Without dead ends: 199 [2024-11-28 05:19:36,607 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 05:19:36,608 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 51 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 88 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:36,608 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 370 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 673 Invalid, 2 Unknown, 0 Unchecked, 14.2s Time] [2024-11-28 05:19:36,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2024-11-28 05:19:36,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 190. [2024-11-28 05:19:36,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 89 states have internal predecessors, (106), 90 states have call successors, (90), 14 states have call predecessors, (90), 14 states have return successors, (88), 86 states have call predecessors, (88), 88 states have call successors, (88) [2024-11-28 05:19:36,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 284 transitions. [2024-11-28 05:19:36,721 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 284 transitions. Word has length 98 [2024-11-28 05:19:36,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:36,721 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 284 transitions. [2024-11-28 05:19:36,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2024-11-28 05:19:36,722 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 284 transitions. [2024-11-28 05:19:36,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-28 05:19:36,723 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:36,723 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:36,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-28 05:19:36,924 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:36,924 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:36,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:36,924 INFO L85 PathProgramCache]: Analyzing trace with hash -389224818, now seen corresponding path program 1 times [2024-11-28 05:19:36,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:36,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694999354] [2024-11-28 05:19:36,924 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:36,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:36,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 38 proven. 7 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-11-28 05:19:37,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:37,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694999354] [2024-11-28 05:19:37,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694999354] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:19:37,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853048509] [2024-11-28 05:19:37,145 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:37,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:37,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:19:37,147 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:19:37,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 05:19:37,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:37,224 INFO L256 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 05:19:37,226 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:19:37,265 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 84 proven. 7 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2024-11-28 05:19:37,265 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:19:37,382 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 38 proven. 7 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-11-28 05:19:37,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853048509] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:19:37,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:19:37,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-11-28 05:19:37,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295064327] [2024-11-28 05:19:37,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:19:37,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 05:19:37,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:37,383 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 05:19:37,384 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 05:19:37,385 INFO L87 Difference]: Start difference. First operand 190 states and 284 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2024-11-28 05:19:37,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:37,710 INFO L93 Difference]: Finished difference Result 223 states and 339 transitions. [2024-11-28 05:19:37,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 05:19:37,711 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 111 [2024-11-28 05:19:37,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:37,713 INFO L225 Difference]: With dead ends: 223 [2024-11-28 05:19:37,713 INFO L226 Difference]: Without dead ends: 211 [2024-11-28 05:19:37,713 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 219 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-11-28 05:19:37,714 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 11 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:37,714 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 292 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:19:37,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-11-28 05:19:37,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 185. [2024-11-28 05:19:37,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 82 states have (on average 1.2195121951219512) internal successors, (100), 85 states have internal predecessors, (100), 89 states have call successors, (89), 13 states have call predecessors, (89), 13 states have return successors, (87), 86 states have call predecessors, (87), 87 states have call successors, (87) [2024-11-28 05:19:37,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 276 transitions. [2024-11-28 05:19:37,815 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 276 transitions. Word has length 111 [2024-11-28 05:19:37,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:37,816 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 276 transitions. [2024-11-28 05:19:37,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2024-11-28 05:19:37,816 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 276 transitions. [2024-11-28 05:19:37,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-28 05:19:37,818 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:37,818 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:37,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-28 05:19:38,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:38,018 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:38,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:38,019 INFO L85 PathProgramCache]: Analyzing trace with hash 784855492, now seen corresponding path program 2 times [2024-11-28 05:19:38,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:38,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093083954] [2024-11-28 05:19:38,019 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:19:38,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:38,045 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:19:38,046 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:19:38,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [177379984] [2024-11-28 05:19:38,047 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:19:38,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:38,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:19:38,049 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:19:38,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 05:19:38,141 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:19:38,141 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:19:38,143 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-28 05:19:38,146 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:19:38,764 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 61 proven. 41 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2024-11-28 05:19:38,764 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:19:38,957 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 68 proven. 7 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2024-11-28 05:19:38,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:38,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093083954] [2024-11-28 05:19:38,957 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:19:38,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177379984] [2024-11-28 05:19:38,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177379984] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:19:38,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:19:38,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 22 [2024-11-28 05:19:38,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73036408] [2024-11-28 05:19:38,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:19:38,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 05:19:38,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:38,959 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 05:19:38,959 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2024-11-28 05:19:38,959 INFO L87 Difference]: Start difference. First operand 185 states and 276 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 19 states have internal predecessors, (39), 9 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2024-11-28 05:19:40,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:40,255 INFO L93 Difference]: Finished difference Result 215 states and 318 transitions. [2024-11-28 05:19:40,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 05:19:40,255 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 19 states have internal predecessors, (39), 9 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) Word has length 111 [2024-11-28 05:19:40,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:40,258 INFO L225 Difference]: With dead ends: 215 [2024-11-28 05:19:40,258 INFO L226 Difference]: Without dead ends: 212 [2024-11-28 05:19:40,259 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 05:19:40,259 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 43 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:40,259 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 430 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 05:19:40,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2024-11-28 05:19:40,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 191. [2024-11-28 05:19:40,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 88 states have (on average 1.2045454545454546) internal successors, (106), 90 states have internal predecessors, (106), 87 states have call successors, (87), 15 states have call predecessors, (87), 15 states have return successors, (86), 85 states have call predecessors, (86), 86 states have call successors, (86) [2024-11-28 05:19:40,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 279 transitions. [2024-11-28 05:19:40,363 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 279 transitions. Word has length 111 [2024-11-28 05:19:40,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:40,363 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 279 transitions. [2024-11-28 05:19:40,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 19 states have internal predecessors, (39), 9 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2024-11-28 05:19:40,363 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 279 transitions. [2024-11-28 05:19:40,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-11-28 05:19:40,364 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:40,364 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:40,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 05:19:40,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:40,565 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:40,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:40,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1677220558, now seen corresponding path program 3 times [2024-11-28 05:19:40,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:40,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813224479] [2024-11-28 05:19:40,566 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:19:40,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:40,606 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-28 05:19:40,606 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:19:40,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1233718543] [2024-11-28 05:19:40,607 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:19:40,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:40,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:19:40,611 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:19:40,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 05:19:40,684 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 05:19:40,684 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:19:40,686 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-28 05:19:40,689 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:19:41,017 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 86 proven. 32 refuted. 0 times theorem prover too weak. 359 trivial. 0 not checked. [2024-11-28 05:19:41,017 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:19:41,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:41,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813224479] [2024-11-28 05:19:41,088 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:19:41,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233718543] [2024-11-28 05:19:41,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233718543] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:19:41,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:19:41,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-11-28 05:19:41,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654767490] [2024-11-28 05:19:41,088 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 05:19:41,089 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 05:19:41,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:41,089 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 05:19:41,089 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-28 05:19:41,089 INFO L87 Difference]: Start difference. First operand 191 states and 279 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2024-11-28 05:19:41,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:41,368 INFO L93 Difference]: Finished difference Result 207 states and 292 transitions. [2024-11-28 05:19:41,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 05:19:41,369 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 114 [2024-11-28 05:19:41,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:41,371 INFO L225 Difference]: With dead ends: 207 [2024-11-28 05:19:41,371 INFO L226 Difference]: Without dead ends: 205 [2024-11-28 05:19:41,371 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-28 05:19:41,371 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 7 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:41,372 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 182 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:19:41,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-11-28 05:19:41,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 203. [2024-11-28 05:19:41,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 97 states have (on average 1.1855670103092784) internal successors, (115), 99 states have internal predecessors, (115), 87 states have call successors, (87), 18 states have call predecessors, (87), 18 states have return successors, (86), 85 states have call predecessors, (86), 86 states have call successors, (86) [2024-11-28 05:19:41,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 288 transitions. [2024-11-28 05:19:41,490 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 288 transitions. Word has length 114 [2024-11-28 05:19:41,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:41,490 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 288 transitions. [2024-11-28 05:19:41,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2024-11-28 05:19:41,490 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 288 transitions. [2024-11-28 05:19:41,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-11-28 05:19:41,492 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:41,492 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:41,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 05:19:41,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:41,692 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:41,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:41,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1710922149, now seen corresponding path program 4 times [2024-11-28 05:19:41,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:41,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118518621] [2024-11-28 05:19:41,693 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:19:41,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:41,722 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:19:41,722 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:19:41,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1599999715] [2024-11-28 05:19:41,723 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:19:41,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:41,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:19:41,725 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:19:41,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 05:19:41,818 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:19:41,818 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:19:41,825 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-28 05:19:41,827 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:19:42,765 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 57 proven. 38 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-11-28 05:19:42,765 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:19:43,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:43,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118518621] [2024-11-28 05:19:43,526 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:19:43,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599999715] [2024-11-28 05:19:43,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599999715] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:19:43,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:19:43,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-11-28 05:19:43,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375828787] [2024-11-28 05:19:43,526 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 05:19:43,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 05:19:43,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:43,527 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 05:19:43,527 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2024-11-28 05:19:43,527 INFO L87 Difference]: Start difference. First operand 203 states and 288 transitions. Second operand has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2024-11-28 05:19:44,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:44,456 INFO L93 Difference]: Finished difference Result 241 states and 336 transitions. [2024-11-28 05:19:44,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 05:19:44,457 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 116 [2024-11-28 05:19:44,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:44,459 INFO L225 Difference]: With dead ends: 241 [2024-11-28 05:19:44,459 INFO L226 Difference]: Without dead ends: 239 [2024-11-28 05:19:44,459 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2024-11-28 05:19:44,460 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 19 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:44,460 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 372 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 05:19:44,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-11-28 05:19:44,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 236. [2024-11-28 05:19:44,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 116 states have internal predecessors, (134), 99 states have call successors, (99), 22 states have call predecessors, (99), 22 states have return successors, (98), 97 states have call predecessors, (98), 98 states have call successors, (98) [2024-11-28 05:19:44,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 331 transitions. [2024-11-28 05:19:44,586 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 331 transitions. Word has length 116 [2024-11-28 05:19:44,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:44,587 INFO L471 AbstractCegarLoop]: Abstraction has 236 states and 331 transitions. [2024-11-28 05:19:44,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2024-11-28 05:19:44,587 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 331 transitions. [2024-11-28 05:19:44,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-11-28 05:19:44,589 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:44,589 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:44,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-28 05:19:44,793 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:44,794 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:44,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:44,794 INFO L85 PathProgramCache]: Analyzing trace with hash -853530013, now seen corresponding path program 2 times [2024-11-28 05:19:44,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:44,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632703903] [2024-11-28 05:19:44,794 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:19:44,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:44,816 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:19:44,816 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:19:44,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [861289047] [2024-11-28 05:19:44,817 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:19:44,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:44,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:19:44,821 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:19:44,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 05:19:44,922 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:19:44,922 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:19:44,924 INFO L256 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-28 05:19:44,927 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:19:45,658 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 73 proven. 38 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-11-28 05:19:45,658 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:19:46,907 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 73 proven. 38 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-11-28 05:19:46,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:46,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632703903] [2024-11-28 05:19:46,908 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:19:46,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861289047] [2024-11-28 05:19:46,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861289047] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:19:46,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:19:46,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2024-11-28 05:19:46,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001176210] [2024-11-28 05:19:46,908 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:19:46,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 05:19:46,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:46,909 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 05:19:46,910 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2024-11-28 05:19:46,910 INFO L87 Difference]: Start difference. First operand 236 states and 331 transitions. Second operand has 27 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 14 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (40), 12 states have call predecessors, (40), 12 states have call successors, (40) [2024-11-28 05:19:50,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 05:19:53,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:53,730 INFO L93 Difference]: Finished difference Result 308 states and 448 transitions. [2024-11-28 05:19:53,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-28 05:19:53,731 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 14 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (40), 12 states have call predecessors, (40), 12 states have call successors, (40) Word has length 127 [2024-11-28 05:19:53,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:53,733 INFO L225 Difference]: With dead ends: 308 [2024-11-28 05:19:53,733 INFO L226 Difference]: Without dead ends: 304 [2024-11-28 05:19:53,734 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 225 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=572, Invalid=2290, Unknown=0, NotChecked=0, Total=2862 [2024-11-28 05:19:53,735 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 56 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:53,735 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 727 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-11-28 05:19:53,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2024-11-28 05:19:53,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 263. [2024-11-28 05:19:53,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 123 states have (on average 1.1788617886178863) internal successors, (145), 126 states have internal predecessors, (145), 115 states have call successors, (115), 24 states have call predecessors, (115), 24 states have return successors, (114), 112 states have call predecessors, (114), 114 states have call successors, (114) [2024-11-28 05:19:53,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 374 transitions. [2024-11-28 05:19:53,945 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 374 transitions. Word has length 127 [2024-11-28 05:19:53,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:53,945 INFO L471 AbstractCegarLoop]: Abstraction has 263 states and 374 transitions. [2024-11-28 05:19:53,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 14 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (40), 12 states have call predecessors, (40), 12 states have call successors, (40) [2024-11-28 05:19:53,946 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 374 transitions. [2024-11-28 05:19:53,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-11-28 05:19:53,948 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:53,948 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:53,956 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 05:19:54,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 05:19:54,152 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:54,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:54,152 INFO L85 PathProgramCache]: Analyzing trace with hash 675635967, now seen corresponding path program 5 times [2024-11-28 05:19:54,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:54,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292359916] [2024-11-28 05:19:54,152 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:19:54,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:54,196 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-28 05:19:54,196 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:19:54,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [416806498] [2024-11-28 05:19:54,198 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:19:54,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:54,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:19:54,200 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:19:54,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 05:19:54,377 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-28 05:19:54,377 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:19:54,380 INFO L256 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-28 05:19:54,383 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:19:55,264 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 74 proven. 74 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2024-11-28 05:19:55,264 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:19:56,446 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 74 proven. 59 refuted. 0 times theorem prover too weak. 621 trivial. 0 not checked. [2024-11-28 05:19:56,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:56,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292359916] [2024-11-28 05:19:56,446 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:19:56,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416806498] [2024-11-28 05:19:56,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416806498] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:19:56,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:19:56,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 30 [2024-11-28 05:19:56,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523698443] [2024-11-28 05:19:56,446 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:19:56,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 05:19:56,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:56,447 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 05:19:56,448 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2024-11-28 05:19:56,448 INFO L87 Difference]: Start difference. First operand 263 states and 374 transitions. Second operand has 30 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 27 states have internal predecessors, (42), 14 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (45), 15 states have call predecessors, (45), 14 states have call successors, (45) [2024-11-28 05:19:59,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:59,482 INFO L93 Difference]: Finished difference Result 312 states and 441 transitions. [2024-11-28 05:19:59,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-28 05:19:59,482 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 27 states have internal predecessors, (42), 14 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (45), 15 states have call predecessors, (45), 14 states have call successors, (45) Word has length 137 [2024-11-28 05:19:59,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:59,484 INFO L225 Difference]: With dead ends: 312 [2024-11-28 05:19:59,484 INFO L226 Difference]: Without dead ends: 310 [2024-11-28 05:19:59,485 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=497, Invalid=1953, Unknown=0, NotChecked=0, Total=2450 [2024-11-28 05:19:59,485 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 57 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:59,487 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 479 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-28 05:19:59,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2024-11-28 05:19:59,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 284. [2024-11-28 05:19:59,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 137 states have (on average 1.1605839416058394) internal successors, (159), 141 states have internal predecessors, (159), 118 states have call successors, (118), 28 states have call predecessors, (118), 28 states have return successors, (117), 114 states have call predecessors, (117), 117 states have call successors, (117) [2024-11-28 05:19:59,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 394 transitions. [2024-11-28 05:19:59,737 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 394 transitions. Word has length 137 [2024-11-28 05:19:59,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:59,738 INFO L471 AbstractCegarLoop]: Abstraction has 284 states and 394 transitions. [2024-11-28 05:19:59,738 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 27 states have internal predecessors, (42), 14 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (45), 15 states have call predecessors, (45), 14 states have call successors, (45) [2024-11-28 05:19:59,738 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 394 transitions. [2024-11-28 05:19:59,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-11-28 05:19:59,740 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:59,740 INFO L218 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:59,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-28 05:19:59,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:59,942 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:59,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:59,942 INFO L85 PathProgramCache]: Analyzing trace with hash 721616946, now seen corresponding path program 6 times [2024-11-28 05:19:59,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:59,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72760089] [2024-11-28 05:19:59,942 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:19:59,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:59,995 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-11-28 05:19:59,995 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:19:59,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2007710570] [2024-11-28 05:19:59,997 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:19:59,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:59,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:19:59,999 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:20:00,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 05:20:00,238 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 05:20:00,238 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:20:00,240 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-28 05:20:00,243 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:20:00,961 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 134 proven. 66 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2024-11-28 05:20:00,961 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:20:01,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:20:01,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72760089] [2024-11-28 05:20:01,157 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:20:01,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007710570] [2024-11-28 05:20:01,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007710570] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:20:01,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:20:01,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-11-28 05:20:01,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120977745] [2024-11-28 05:20:01,157 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 05:20:01,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 05:20:01,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:20:01,158 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 05:20:01,158 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2024-11-28 05:20:01,158 INFO L87 Difference]: Start difference. First operand 284 states and 394 transitions. Second operand has 16 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2024-11-28 05:20:02,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:20:07,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:20:07,900 INFO L93 Difference]: Finished difference Result 291 states and 400 transitions. [2024-11-28 05:20:07,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 05:20:07,901 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 142 [2024-11-28 05:20:07,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:20:07,903 INFO L225 Difference]: With dead ends: 291 [2024-11-28 05:20:07,903 INFO L226 Difference]: Without dead ends: 289 [2024-11-28 05:20:07,904 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=128, Invalid=521, Unknown=1, NotChecked=0, Total=650 [2024-11-28 05:20:07,904 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 12 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:20:07,905 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 235 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-28 05:20:07,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2024-11-28 05:20:08,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 288. [2024-11-28 05:20:08,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 140 states have (on average 1.1571428571428573) internal successors, (162), 144 states have internal predecessors, (162), 118 states have call successors, (118), 29 states have call predecessors, (118), 29 states have return successors, (117), 114 states have call predecessors, (117), 117 states have call successors, (117) [2024-11-28 05:20:08,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 397 transitions. [2024-11-28 05:20:08,127 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 397 transitions. Word has length 142 [2024-11-28 05:20:08,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:20:08,128 INFO L471 AbstractCegarLoop]: Abstraction has 288 states and 397 transitions. [2024-11-28 05:20:08,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2024-11-28 05:20:08,128 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 397 transitions. [2024-11-28 05:20:08,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2024-11-28 05:20:08,131 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:20:08,131 INFO L218 NwaCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:20:08,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-28 05:20:08,331 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:20:08,332 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:20:08,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:20:08,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1166962277, now seen corresponding path program 7 times [2024-11-28 05:20:08,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:20:08,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758229768] [2024-11-28 05:20:08,332 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:20:08,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:20:08,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 05:20:08,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [643597113] [2024-11-28 05:20:08,357 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:20:08,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:20:08,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:20:08,361 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:20:08,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 05:20:08,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:20:08,483 INFO L256 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-11-28 05:20:08,487 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:20:09,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1097 backedges. 103 proven. 88 refuted. 0 times theorem prover too weak. 906 trivial. 0 not checked. [2024-11-28 05:20:09,896 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:20:11,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:20:11,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758229768] [2024-11-28 05:20:11,463 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:20:11,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643597113] [2024-11-28 05:20:11,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643597113] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:20:11,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:20:11,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-11-28 05:20:11,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753922835] [2024-11-28 05:20:11,463 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 05:20:11,463 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 05:20:11,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:20:11,464 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 05:20:11,464 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2024-11-28 05:20:11,465 INFO L87 Difference]: Start difference. First operand 288 states and 397 transitions. Second operand has 20 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2024-11-28 05:20:12,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:20:12,759 INFO L93 Difference]: Finished difference Result 333 states and 463 transitions. [2024-11-28 05:20:12,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 05:20:12,760 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) Word has length 158 [2024-11-28 05:20:12,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:20:12,763 INFO L225 Difference]: With dead ends: 333 [2024-11-28 05:20:12,763 INFO L226 Difference]: Without dead ends: 331 [2024-11-28 05:20:12,764 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=228, Invalid=1332, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 05:20:12,765 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 34 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 05:20:12,765 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 400 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 05:20:12,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2024-11-28 05:20:12,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 297. [2024-11-28 05:20:12,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 144 states have (on average 1.1597222222222223) internal successors, (167), 148 states have internal predecessors, (167), 122 states have call successors, (122), 30 states have call predecessors, (122), 30 states have return successors, (121), 118 states have call predecessors, (121), 121 states have call successors, (121) [2024-11-28 05:20:12,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 410 transitions. [2024-11-28 05:20:12,990 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 410 transitions. Word has length 158 [2024-11-28 05:20:12,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:20:12,991 INFO L471 AbstractCegarLoop]: Abstraction has 297 states and 410 transitions. [2024-11-28 05:20:12,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2024-11-28 05:20:12,991 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 410 transitions. [2024-11-28 05:20:12,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2024-11-28 05:20:12,993 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:20:12,993 INFO L218 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:20:13,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-28 05:20:13,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-28 05:20:13,198 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:20:13,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:20:13,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1997515563, now seen corresponding path program 3 times [2024-11-28 05:20:13,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:20:13,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587688928] [2024-11-28 05:20:13,198 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:20:13,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:20:13,244 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-28 05:20:13,244 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:20:13,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1628442711] [2024-11-28 05:20:13,246 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:20:13,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:20:13,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:20:13,249 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:20:13,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 05:20:13,470 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-28 05:20:13,470 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:20:13,472 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-28 05:20:13,476 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:20:14,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 259 proven. 30 refuted. 0 times theorem prover too weak. 1002 trivial. 0 not checked. [2024-11-28 05:20:14,120 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:20:14,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:20:14,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587688928] [2024-11-28 05:20:14,641 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:20:14,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628442711] [2024-11-28 05:20:14,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628442711] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:20:14,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:20:14,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-11-28 05:20:14,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212410435] [2024-11-28 05:20:14,641 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 05:20:14,641 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 05:20:14,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:20:14,642 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 05:20:14,642 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2024-11-28 05:20:14,642 INFO L87 Difference]: Start difference. First operand 297 states and 410 transitions. Second operand has 17 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2024-11-28 05:20:19,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.81s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:20:34,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:20:34,943 INFO L93 Difference]: Finished difference Result 330 states and 435 transitions. [2024-11-28 05:20:34,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 05:20:34,943 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) Word has length 169 [2024-11-28 05:20:34,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:20:34,944 INFO L225 Difference]: With dead ends: 330 [2024-11-28 05:20:34,944 INFO L226 Difference]: Without dead ends: 0 [2024-11-28 05:20:34,945 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 159 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=169, Invalid=696, Unknown=5, NotChecked=0, Total=870 [2024-11-28 05:20:34,947 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 11 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 26 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:20:34,947 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 224 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 348 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2024-11-28 05:20:34,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-28 05:20:34,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-28 05:20:34,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:20:34,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-28 05:20:34,948 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 169 [2024-11-28 05:20:34,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:20:34,948 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-28 05:20:34,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2024-11-28 05:20:34,950 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-28 05:20:34,951 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-28 05:20:34,953 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-28 05:20:34,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-28 05:20:35,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-28 05:20:35,157 INFO L422 BasicCegarLoop]: Path program histogram: [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:20:35,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-28 05:20:40,299 WARN L286 SmtUtils]: Spent 5.14s on a formula simplification. DAG size of input: 428 DAG size of output: 777 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-11-28 05:21:46,559 WARN L286 SmtUtils]: Spent 54.74s on a formula simplification. DAG size of input: 777 DAG size of output: 51 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-11-28 05:23:05,348 WARN L286 SmtUtils]: Spent 1.31m on a formula simplification. DAG size of input: 793 DAG size of output: 51 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-11-28 05:23:56,471 WARN L286 SmtUtils]: Spent 50.75s on a formula simplification. DAG size of input: 378 DAG size of output: 42 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-11-28 05:25:11,733 WARN L286 SmtUtils]: Spent 1.25m on a formula simplification. DAG size of input: 793 DAG size of output: 51 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-11-28 05:26:12,620 WARN L286 SmtUtils]: Spent 1.01m on a formula simplification. DAG size of input: 801 DAG size of output: 52 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-11-28 05:26:12,625 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-28 05:26:12,648 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 05:26:12 BoogieIcfgContainer [2024-11-28 05:26:12,648 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-28 05:26:12,648 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-28 05:26:12,648 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-28 05:26:12,649 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-28 05:26:12,650 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:18:47" (3/4) ... [2024-11-28 05:26:12,652 INFO L146 WitnessPrinter]: Generating witness for correct program [2024-11-28 05:26:12,660 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2024-11-28 05:26:12,660 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-11-28 05:26:12,668 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2024-11-28 05:26:12,669 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2024-11-28 05:26:12,669 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-11-28 05:26:12,669 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-28 05:26:12,771 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/witness.graphml [2024-11-28 05:26:12,771 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/witness.yml [2024-11-28 05:26:12,771 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-28 05:26:12,773 INFO L158 Benchmark]: Toolchain (without parser) took 445702.41ms. Allocated memory was 117.4MB in the beginning and 520.1MB in the end (delta: 402.7MB). Free memory was 93.3MB in the beginning and 336.4MB in the end (delta: -243.1MB). Peak memory consumption was 158.4MB. Max. memory is 16.1GB. [2024-11-28 05:26:12,774 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 167.8MB. Free memory is still 103.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 05:26:12,774 INFO L158 Benchmark]: CACSL2BoogieTranslator took 290.48ms. Allocated memory is still 117.4MB. Free memory was 93.0MB in the beginning and 81.4MB in the end (delta: 11.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 05:26:12,774 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.57ms. Allocated memory is still 117.4MB. Free memory was 81.4MB in the beginning and 80.4MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 05:26:12,774 INFO L158 Benchmark]: Boogie Preprocessor took 48.56ms. Allocated memory is still 117.4MB. Free memory was 80.4MB in the beginning and 78.8MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 05:26:12,775 INFO L158 Benchmark]: RCFGBuilder took 298.94ms. Allocated memory is still 117.4MB. Free memory was 78.8MB in the beginning and 66.9MB in the end (delta: 11.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 05:26:12,775 INFO L158 Benchmark]: TraceAbstraction took 444888.77ms. Allocated memory was 117.4MB in the beginning and 520.1MB in the end (delta: 402.7MB). Free memory was 66.2MB in the beginning and 344.5MB in the end (delta: -278.3MB). Peak memory consumption was 286.9MB. Max. memory is 16.1GB. [2024-11-28 05:26:12,775 INFO L158 Benchmark]: Witness Printer took 123.17ms. Allocated memory is still 520.1MB. Free memory was 344.5MB in the beginning and 336.4MB in the end (delta: 8.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 05:26:12,777 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 167.8MB. Free memory is still 103.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 290.48ms. Allocated memory is still 117.4MB. Free memory was 93.0MB in the beginning and 81.4MB in the end (delta: 11.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.57ms. Allocated memory is still 117.4MB. Free memory was 81.4MB in the beginning and 80.4MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 48.56ms. Allocated memory is still 117.4MB. Free memory was 80.4MB in the beginning and 78.8MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 298.94ms. Allocated memory is still 117.4MB. Free memory was 78.8MB in the beginning and 66.9MB in the end (delta: 11.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 444888.77ms. Allocated memory was 117.4MB in the beginning and 520.1MB in the end (delta: 402.7MB). Free memory was 66.2MB in the beginning and 344.5MB in the end (delta: -278.3MB). Peak memory consumption was 286.9MB. Max. memory is 16.1GB. * Witness Printer took 123.17ms. Allocated memory is still 520.1MB. Free memory was 344.5MB in the beginning and 336.4MB in the end (delta: 8.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 107.3s, OverallIterations: 22, TraceHistogramMax: 25, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 77.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3 mSolverCounterUnknown, 573 SdHoareTripleChecker+Valid, 31.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 468 mSDsluCounter, 5943 SdHoareTripleChecker+Invalid, 30.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5110 mSDsCounter, 801 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6790 IncrementalHoareTripleChecker+Invalid, 7594 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 801 mSolverCounterUnsat, 833 mSDtfsCounter, 6790 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3088 GetRequests, 2627 SyntacticMatches, 23 SemanticMatches, 438 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2419 ImplicationChecksByTransitivity, 51.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=297occurred in iteration=21, InterpolantAutomatonStates: 312, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.9s AutomataMinimizationTime, 22 MinimizatonAttempts, 228 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 20.2s InterpolantComputationTime, 3928 NumberOfCodeBlocks, 3665 NumberOfCodeBlocksAsserted, 122 NumberOfCheckSat, 3015 ConstructedInterpolants, 9 QuantifiedInterpolants, 15628 SizeOfPredicates, 65 NumberOfNonLiveVariables, 4159 ConjunctsInSsa, 651 ConjunctsInUnsatCore, 34 InterpolantComputations, 5 PerfectInterpolantSequences, 10889/11566 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: (((((((((((((((yy == ((long long) y * y)) && (p == 1)) && (b == y)) && (1 <= b)) && (0 <= c)) && (x <= 100)) && (r == 0)) && (q == 0)) && (1 <= a)) && (xy == ((long long) x * y))) && (a == x)) && (x == (c + ((__int128) b * k)))) && (y <= 100)) && (s == 1)) || (((((((((((((0 <= b) && (b != 0)) && (yy == ((long long) y * y))) && ((((__int128) r * y) + ((__int128) p * x)) == (c + ((__int128) b * k)))) && (1 <= y)) && (((__int128) b + 1) <= a)) && ((((__int128) s * y) + ((__int128) q * x)) == b)) && (0 <= c)) && (x <= 100)) && (1 <= x)) && (xy == ((long long) x * y))) && ((((__int128) r * y) + ((__int128) p * x)) == a)) && (y <= 100))) - InvariantResult [Line: 41]: Loop Invariant Derived loop invariant: (((((((((((0 <= b) && (yy == ((long long) y * y))) && (1 <= y)) && (((__int128) b + 1) <= a)) && ((((__int128) s * y) + ((__int128) q * x)) == b)) && (x <= 100)) && (1 <= x)) && (xy == ((long long) x * y))) && ((((__int128) r * y) + ((__int128) p * x)) == a)) && (y <= 100)) || ((((((((((((yy == ((long long) y * y)) && (p == 1)) && (b == y)) && (1 <= b)) && (x <= 100)) && (r == 0)) && (q == 0)) && (1 <= x)) && (xy == ((long long) x * y))) && (a == x)) && (y <= 100)) && (s == 1))) RESULT: Ultimate proved your program to be correct! [2024-11-28 05:26:13,004 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forcibly destroying the process [2024-11-28 05:26:13,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8a6c8-0ec1-4a5a-adb2-0cf0b955b922/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE