./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.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_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/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_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/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_88ef890e-cce8-49df-bcb4-b715eb18d399/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 bda512f5ab4e84c08e80fd02a1c07c8fba5ca60aa45d55edfde2cc268dd1288e --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:10:47,111 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:10:47,204 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 04:10:47,214 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:10:47,214 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:10:47,261 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:10:47,263 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:10:47,264 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:10:47,264 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:10:47,265 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:10:47,266 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:10:47,266 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:10:47,267 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:10:47,267 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:10:47,267 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:10:47,268 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:10:47,268 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 04:10:47,269 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:10:47,269 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:10:47,269 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:10:47,269 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:10:47,269 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 04:10:47,269 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:10:47,269 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 04:10:47,270 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:10:47,270 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 04:10:47,270 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:10:47,270 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:10:47,270 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:10:47,270 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:10:47,271 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:10:47,271 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:10:47,271 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:10:47,271 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:10:47,272 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:10:47,272 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:10:47,272 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:10:47,273 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:10:47,273 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:10:47,273 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:10:47,273 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 04:10:47,273 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 04:10:47,273 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 04:10:47,274 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 04:10:47,274 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:10:47,274 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:10:47,274 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:10:47,274 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:10:47,274 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_88ef890e-cce8-49df-bcb4-b715eb18d399/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 -> bda512f5ab4e84c08e80fd02a1c07c8fba5ca60aa45d55edfde2cc268dd1288e [2024-11-28 04:10:47,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:10:47,661 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:10:47,663 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:10:47,667 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:10:47,667 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:10:47,670 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c [2024-11-28 04:10:51,341 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/data/756fc9e5d/afd8a33a4f534158a546904754f969b2/FLAG9af7ca5a2 [2024-11-28 04:10:51,655 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:10:51,656 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c [2024-11-28 04:10:51,668 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/data/756fc9e5d/afd8a33a4f534158a546904754f969b2/FLAG9af7ca5a2 [2024-11-28 04:10:51,699 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/data/756fc9e5d/afd8a33a4f534158a546904754f969b2 [2024-11-28 04:10:51,701 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:10:51,703 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:10:51,704 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:10:51,705 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:10:51,710 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:10:51,711 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:10:51" (1/1) ... [2024-11-28 04:10:51,715 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f4df9af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:10:51, skipping insertion in model container [2024-11-28 04:10:51,715 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:10:51" (1/1) ... [2024-11-28 04:10:51,740 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:10:51,935 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_88ef890e-cce8-49df-bcb4-b715eb18d399/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c[490,503] [2024-11-28 04:10:51,973 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:10:51,984 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:10:51,999 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_88ef890e-cce8-49df-bcb4-b715eb18d399/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c[490,503] [2024-11-28 04:10:52,012 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:10:52,029 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:10:52,029 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:10:52 WrapperNode [2024-11-28 04:10:52,030 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:10:52,031 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:10:52,031 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:10:52,031 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:10:52,040 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:10:52" (1/1) ... [2024-11-28 04:10:52,047 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:10:52" (1/1) ... [2024-11-28 04:10:52,069 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2024-11-28 04:10:52,069 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:10:52,070 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:10:52,070 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:10:52,070 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:10:52,082 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:10:52" (1/1) ... [2024-11-28 04:10:52,082 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:10:52" (1/1) ... [2024-11-28 04:10:52,084 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:10:52" (1/1) ... [2024-11-28 04:10:52,098 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 04:10:52,098 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:10:52" (1/1) ... [2024-11-28 04:10:52,098 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:10:52" (1/1) ... [2024-11-28 04:10:52,102 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:10:52" (1/1) ... [2024-11-28 04:10:52,103 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:10:52" (1/1) ... [2024-11-28 04:10:52,107 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:10:52" (1/1) ... [2024-11-28 04:10:52,109 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:10:52" (1/1) ... [2024-11-28 04:10:52,110 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:10:52" (1/1) ... [2024-11-28 04:10:52,116 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:10:52,117 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:10:52,117 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:10:52,117 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:10:52,118 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:10:52" (1/1) ... [2024-11-28 04:10:52,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:10:52,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:10:52,177 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:10:52,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:10:52,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:10:52,215 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-28 04:10:52,216 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-28 04:10:52,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 04:10:52,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:10:52,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:10:52,216 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-28 04:10:52,216 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-28 04:10:52,301 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:10:52,303 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:10:52,554 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-28 04:10:52,555 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:10:52,570 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:10:52,570 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-28 04:10:52,571 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:10:52 BoogieIcfgContainer [2024-11-28 04:10:52,573 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:10:52,576 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:10:52,579 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:10:52,587 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:10:52,587 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:10:51" (1/3) ... [2024-11-28 04:10:52,588 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20dd891c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:10:52, skipping insertion in model container [2024-11-28 04:10:52,589 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:10:52" (2/3) ... [2024-11-28 04:10:52,589 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20dd891c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:10:52, skipping insertion in model container [2024-11-28 04:10:52,590 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:10:52" (3/3) ... [2024-11-28 04:10:52,592 INFO L128 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound2.c [2024-11-28 04:10:52,614 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:10:52,618 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd3-ll_valuebound2.c that has 3 procedures, 32 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-28 04:10:52,707 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:10:52,727 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;@666802ab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:10:52,729 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 04:10:52,734 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-28 04:10:52,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-28 04:10:52,744 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:10:52,746 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:10:52,746 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:10:52,753 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:10:52,755 INFO L85 PathProgramCache]: Analyzing trace with hash 843678977, now seen corresponding path program 1 times [2024-11-28 04:10:52,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:10:52,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309268523] [2024-11-28 04:10:52,766 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:10:52,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:10:52,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:10:52,976 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 04:10:52,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:10:52,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309268523] [2024-11-28 04:10:52,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309268523] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:10:52,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133760494] [2024-11-28 04:10:52,978 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:10:52,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:52,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:10:52,981 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:10:52,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 04:10:53,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:10:53,089 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-28 04:10:53,096 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:10:53,111 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 04:10:53,112 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:10:53,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133760494] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:10:53,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:10:53,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-28 04:10:53,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288238521] [2024-11-28 04:10:53,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:10:53,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-28 04:10:53,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:10:53,149 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-28 04:10:53,150 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 04:10:53,153 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:10:53,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:10:53,180 INFO L93 Difference]: Finished difference Result 61 states and 103 transitions. [2024-11-28 04:10:53,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-28 04:10:53,182 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2024-11-28 04:10:53,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:10:53,189 INFO L225 Difference]: With dead ends: 61 [2024-11-28 04:10:53,189 INFO L226 Difference]: Without dead ends: 28 [2024-11-28 04:10:53,194 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 30 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 04:10:53,197 INFO L435 NwaCegarLoop]: 41 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, 41 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 04:10:53,198 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:10:53,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-28 04:10:53,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-28 04:10:53,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 04:10:53,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2024-11-28 04:10:53,243 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 29 [2024-11-28 04:10:53,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:10:53,243 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2024-11-28 04:10:53,243 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:10:53,244 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2024-11-28 04:10:53,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-28 04:10:53,246 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:10:53,246 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:10:53,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 04:10:53,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:53,447 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:10:53,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:10:53,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1035775035, now seen corresponding path program 1 times [2024-11-28 04:10:53,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:10:53,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246082988] [2024-11-28 04:10:53,449 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:10:53,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:10:53,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:10:53,894 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 04:10:53,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:10:53,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246082988] [2024-11-28 04:10:53,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246082988] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:10:53,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:10:53,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 04:10:53,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493211623] [2024-11-28 04:10:53,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:10:53,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:10:53,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:10:53,898 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:10:53,898 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:10:53,899 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 04:10:54,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:10:54,046 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2024-11-28 04:10:54,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:10:54,047 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2024-11-28 04:10:54,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:10:54,048 INFO L225 Difference]: With dead ends: 44 [2024-11-28 04:10:54,048 INFO L226 Difference]: Without dead ends: 37 [2024-11-28 04:10:54,049 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:10:54,050 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 21 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:10:54,050 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 90 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:10:54,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-28 04:10:54,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2024-11-28 04:10:54,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 04:10:54,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2024-11-28 04:10:54,064 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 29 [2024-11-28 04:10:54,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:10:54,064 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2024-11-28 04:10:54,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 04:10:54,065 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2024-11-28 04:10:54,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-28 04:10:54,066 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:10:54,066 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:10:54,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 04:10:54,067 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:10:54,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:10:54,068 INFO L85 PathProgramCache]: Analyzing trace with hash -2050156495, now seen corresponding path program 1 times [2024-11-28 04:10:54,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:10:54,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142629409] [2024-11-28 04:10:54,068 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:10:54,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:10:54,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:10:54,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1516642296] [2024-11-28 04:10:54,101 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:10:54,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:54,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:10:54,104 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:10:54,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 04:10:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:10:54,245 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 04:10:54,249 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:10:54,383 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 04:10:54,383 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:10:54,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:10:54,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142629409] [2024-11-28 04:10:54,384 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:10:54,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516642296] [2024-11-28 04:10:54,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516642296] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:10:54,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:10:54,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:10:54,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48106435] [2024-11-28 04:10:54,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:10:54,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:10:54,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:10:54,388 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:10:54,389 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:10:54,392 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 04:10:54,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:10:54,491 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2024-11-28 04:10:54,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:10:54,492 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2024-11-28 04:10:54,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:10:54,493 INFO L225 Difference]: With dead ends: 43 [2024-11-28 04:10:54,495 INFO L226 Difference]: Without dead ends: 41 [2024-11-28 04:10:54,496 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 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 04:10:54,498 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:10:54,499 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 122 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:10:54,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-28 04:10:54,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2024-11-28 04:10:54,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-28 04:10:54,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2024-11-28 04:10:54,527 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 30 [2024-11-28 04:10:54,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:10:54,527 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2024-11-28 04:10:54,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 04:10:54,528 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2024-11-28 04:10:54,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-28 04:10:54,530 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:10:54,531 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:10:54,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 04:10:54,731 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:54,732 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:10:54,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:10:54,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1667987617, now seen corresponding path program 1 times [2024-11-28 04:10:54,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:10:54,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036714093] [2024-11-28 04:10:54,733 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:10:54,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:10:54,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:10:55,156 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 04:10:55,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:10:55,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036714093] [2024-11-28 04:10:55,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036714093] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:10:55,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911335882] [2024-11-28 04:10:55,157 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:10:55,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:55,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:10:55,160 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:10:55,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 04:10:55,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:10:55,247 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 04:10:55,249 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:10:55,329 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 04:10:55,329 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:10:55,480 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 04:10:55,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911335882] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:10:55,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:10:55,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-11-28 04:10:55,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747210400] [2024-11-28 04:10:55,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:10:55,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 04:10:55,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:10:55,482 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 04:10:55,482 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-28 04:10:55,483 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:10:55,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:10:55,779 INFO L93 Difference]: Finished difference Result 82 states and 122 transitions. [2024-11-28 04:10:55,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 04:10:55,780 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2024-11-28 04:10:55,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:10:55,782 INFO L225 Difference]: With dead ends: 82 [2024-11-28 04:10:55,782 INFO L226 Difference]: Without dead ends: 75 [2024-11-28 04:10:55,783 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 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 04:10:55,783 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 67 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:10:55,784 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 166 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:10:55,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-28 04:10:55,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2024-11-28 04:10:55,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 34 states have internal predecessors, (45), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-28 04:10:55,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 78 transitions. [2024-11-28 04:10:55,823 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 78 transitions. Word has length 32 [2024-11-28 04:10:55,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:10:55,824 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 78 transitions. [2024-11-28 04:10:55,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:10:55,824 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 78 transitions. [2024-11-28 04:10:55,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-28 04:10:55,825 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:10:55,826 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:10:55,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 04:10:56,026 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:56,026 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:10:56,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:10:56,027 INFO L85 PathProgramCache]: Analyzing trace with hash -173910057, now seen corresponding path program 1 times [2024-11-28 04:10:56,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:10:56,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799403170] [2024-11-28 04:10:56,027 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:10:56,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:10:56,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:10:56,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [321326126] [2024-11-28 04:10:56,061 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:10:56,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:56,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:10:56,065 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:10:56,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 04:10:56,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:10:56,136 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 04:10:56,139 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:10:56,316 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 04:10:56,316 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:10:56,441 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 04:10:56,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:10:56,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799403170] [2024-11-28 04:10:56,442 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:10:56,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321326126] [2024-11-28 04:10:56,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321326126] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:10:56,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:10:56,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2024-11-28 04:10:56,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541512766] [2024-11-28 04:10:56,443 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:10:56,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 04:10:56,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:10:56,444 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 04:10:56,444 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-28 04:10:56,445 INFO L87 Difference]: Start difference. First operand 54 states and 78 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 04:10:56,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:10:56,630 INFO L93 Difference]: Finished difference Result 83 states and 120 transitions. [2024-11-28 04:10:56,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:10:56,630 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), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2024-11-28 04:10:56,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:10:56,632 INFO L225 Difference]: With dead ends: 83 [2024-11-28 04:10:56,632 INFO L226 Difference]: Without dead ends: 81 [2024-11-28 04:10:56,633 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:10:56,633 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 26 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:10:56,634 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 216 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:10:56,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-28 04:10:56,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2024-11-28 04:10:56,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 48 states have internal predecessors, (65), 25 states have call successors, (25), 4 states have call predecessors, (25), 4 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-28 04:10:56,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 114 transitions. [2024-11-28 04:10:56,671 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 114 transitions. Word has length 33 [2024-11-28 04:10:56,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:10:56,671 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 114 transitions. [2024-11-28 04:10:56,671 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), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 04:10:56,671 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 114 transitions. [2024-11-28 04:10:56,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-28 04:10:56,674 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:10:56,674 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:10:56,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 04:10:56,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:56,875 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:10:56,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:10:56,875 INFO L85 PathProgramCache]: Analyzing trace with hash 379334257, now seen corresponding path program 2 times [2024-11-28 04:10:56,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:10:56,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517426464] [2024-11-28 04:10:56,876 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:10:56,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:10:56,901 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:10:56,902 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:10:57,098 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 04:10:57,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:10:57,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517426464] [2024-11-28 04:10:57,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517426464] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:10:57,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273843051] [2024-11-28 04:10:57,099 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:10:57,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:57,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:10:57,105 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:10:57,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 04:10:57,176 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:10:57,176 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:10:57,178 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 04:10:57,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:10:57,229 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 04:10:57,229 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:10:57,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273843051] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:10:57,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:10:57,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-28 04:10:57,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369714048] [2024-11-28 04:10:57,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:10:57,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:10:57,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:10:57,232 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:10:57,232 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-28 04:10:57,232 INFO L87 Difference]: Start difference. First operand 77 states and 114 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 04:10:57,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:10:57,397 INFO L93 Difference]: Finished difference Result 116 states and 178 transitions. [2024-11-28 04:10:57,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:10:57,398 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 36 [2024-11-28 04:10:57,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:10:57,400 INFO L225 Difference]: With dead ends: 116 [2024-11-28 04:10:57,400 INFO L226 Difference]: Without dead ends: 87 [2024-11-28 04:10:57,400 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:10:57,401 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 13 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:10:57,402 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 122 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:10:57,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-28 04:10:57,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 58. [2024-11-28 04:10:57,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 37 states have internal predecessors, (46), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-28 04:10:57,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 79 transitions. [2024-11-28 04:10:57,427 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 79 transitions. Word has length 36 [2024-11-28 04:10:57,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:10:57,428 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 79 transitions. [2024-11-28 04:10:57,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 04:10:57,428 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 79 transitions. [2024-11-28 04:10:57,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-28 04:10:57,429 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:10:57,429 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 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 04:10:57,441 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 04:10:57,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-28 04:10:57,634 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:10:57,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:10:57,634 INFO L85 PathProgramCache]: Analyzing trace with hash 983263606, now seen corresponding path program 1 times [2024-11-28 04:10:57,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:10:57,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524181634] [2024-11-28 04:10:57,634 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:10:57,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:10:57,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:10:57,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1896624868] [2024-11-28 04:10:57,671 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:10:57,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:57,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:10:57,674 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:10:57,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 04:10:57,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:10:57,751 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 04:10:57,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:10:57,981 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 04:10:57,981 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:10:58,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:10:58,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524181634] [2024-11-28 04:10:58,084 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:10:58,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896624868] [2024-11-28 04:10:58,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896624868] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:10:58,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:10:58,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2024-11-28 04:10:58,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210821570] [2024-11-28 04:10:58,085 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:10:58,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 04:10:58,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:10:58,087 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 04:10:58,091 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:10:58,091 INFO L87 Difference]: Start difference. First operand 58 states and 79 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 04:10:58,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:10:58,371 INFO L93 Difference]: Finished difference Result 79 states and 110 transitions. [2024-11-28 04:10:58,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 04:10:58,373 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2024-11-28 04:10:58,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:10:58,375 INFO L225 Difference]: With dead ends: 79 [2024-11-28 04:10:58,379 INFO L226 Difference]: Without dead ends: 77 [2024-11-28 04:10:58,380 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 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 04:10:58,380 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 21 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:10:58,381 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 179 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:10:58,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-28 04:10:58,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2024-11-28 04:10:58,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 45 states have internal predecessors, (57), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-28 04:10:58,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 106 transitions. [2024-11-28 04:10:58,419 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 106 transitions. Word has length 38 [2024-11-28 04:10:58,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:10:58,420 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 106 transitions. [2024-11-28 04:10:58,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 04:10:58,420 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 106 transitions. [2024-11-28 04:10:58,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-28 04:10:58,424 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:10:58,424 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2024-11-28 04:10:58,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 04:10:58,624 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-28 04:10:58,625 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:10:58,625 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:10:58,626 INFO L85 PathProgramCache]: Analyzing trace with hash 991206135, now seen corresponding path program 1 times [2024-11-28 04:10:58,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:10:58,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111861350] [2024-11-28 04:10:58,627 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:10:58,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:10:58,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:10:58,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1104845300] [2024-11-28 04:10:58,649 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:10:58,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:58,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:10:58,652 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:10:58,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 04:10:58,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:10:58,725 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 04:10:58,727 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:10:58,783 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-28 04:10:58,784 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:10:58,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:10:58,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111861350] [2024-11-28 04:10:58,784 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:10:58,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104845300] [2024-11-28 04:10:58,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104845300] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:10:58,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:10:58,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:10:58,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130458670] [2024-11-28 04:10:58,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:10:58,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:10:58,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:10:58,786 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:10:58,786 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:10:58,786 INFO L87 Difference]: Start difference. First operand 75 states and 106 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-28 04:10:58,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:10:58,898 INFO L93 Difference]: Finished difference Result 104 states and 148 transitions. [2024-11-28 04:10:58,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:10:58,899 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2024-11-28 04:10:58,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:10:58,900 INFO L225 Difference]: With dead ends: 104 [2024-11-28 04:10:58,901 INFO L226 Difference]: Without dead ends: 102 [2024-11-28 04:10:58,901 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 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 04:10:58,902 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:10:58,902 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 112 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:10:58,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-28 04:10:58,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2024-11-28 04:10:58,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 54 states have internal predecessors, (69), 37 states have call successors, (37), 7 states have call predecessors, (37), 7 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2024-11-28 04:10:58,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 142 transitions. [2024-11-28 04:10:58,950 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 142 transitions. Word has length 43 [2024-11-28 04:10:58,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:10:58,951 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 142 transitions. [2024-11-28 04:10:58,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-28 04:10:58,951 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 142 transitions. [2024-11-28 04:10:58,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-28 04:10:58,952 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:10:58,953 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2024-11-28 04:10:58,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 04:10:59,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:59,153 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:10:59,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:10:59,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1573549508, now seen corresponding path program 1 times [2024-11-28 04:10:59,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:10:59,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736605307] [2024-11-28 04:10:59,154 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:10:59,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:10:59,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:10:59,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1502408113] [2024-11-28 04:10:59,171 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:10:59,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:59,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:10:59,174 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:10:59,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 04:10:59,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:10:59,267 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 04:10:59,269 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:10:59,342 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-28 04:10:59,343 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:10:59,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:10:59,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736605307] [2024-11-28 04:10:59,344 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:10:59,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502408113] [2024-11-28 04:10:59,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502408113] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:10:59,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:10:59,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:10:59,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28136066] [2024-11-28 04:10:59,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:10:59,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:10:59,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:10:59,348 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:10:59,348 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:10:59,348 INFO L87 Difference]: Start difference. First operand 98 states and 142 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 04:10:59,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:10:59,484 INFO L93 Difference]: Finished difference Result 148 states and 231 transitions. [2024-11-28 04:10:59,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:10:59,485 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 45 [2024-11-28 04:10:59,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:10:59,487 INFO L225 Difference]: With dead ends: 148 [2024-11-28 04:10:59,487 INFO L226 Difference]: Without dead ends: 146 [2024-11-28 04:10:59,488 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 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 04:10:59,488 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:10:59,489 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 120 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:10:59,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-11-28 04:10:59,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 134. [2024-11-28 04:10:59,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 65 states have internal predecessors, (72), 69 states have call successors, (69), 8 states have call predecessors, (69), 8 states have return successors, (68), 60 states have call predecessors, (68), 68 states have call successors, (68) [2024-11-28 04:10:59,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 209 transitions. [2024-11-28 04:10:59,559 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 209 transitions. Word has length 45 [2024-11-28 04:10:59,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:10:59,560 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 209 transitions. [2024-11-28 04:10:59,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 04:10:59,560 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 209 transitions. [2024-11-28 04:10:59,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-28 04:10:59,562 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:10:59,562 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 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] [2024-11-28 04:10:59,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 04:10:59,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:59,768 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:10:59,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:10:59,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1799924239, now seen corresponding path program 1 times [2024-11-28 04:10:59,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:10:59,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533582546] [2024-11-28 04:10:59,769 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:10:59,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:10:59,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:10:59,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [828066204] [2024-11-28 04:10:59,803 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:10:59,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:59,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:10:59,806 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:10:59,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 04:10:59,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:10:59,889 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-28 04:10:59,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:11:00,937 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-28 04:11:00,937 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:11:01,717 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-28 04:11:01,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:11:01,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533582546] [2024-11-28 04:11:01,718 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:11:01,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828066204] [2024-11-28 04:11:01,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828066204] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:11:01,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:11:01,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-11-28 04:11:01,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566529375] [2024-11-28 04:11:01,719 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:11:01,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 04:11:01,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:11:01,721 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 04:11:01,721 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2024-11-28 04:11:01,721 INFO L87 Difference]: Start difference. First operand 134 states and 209 transitions. Second operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-11-28 04:11:05,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:11:05,712 INFO L93 Difference]: Finished difference Result 358 states and 580 transitions. [2024-11-28 04:11:05,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-28 04:11:05,713 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 55 [2024-11-28 04:11:05,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:11:05,720 INFO L225 Difference]: With dead ends: 358 [2024-11-28 04:11:05,720 INFO L226 Difference]: Without dead ends: 276 [2024-11-28 04:11:05,724 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=398, Invalid=1672, Unknown=0, NotChecked=0, Total=2070 [2024-11-28 04:11:05,728 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 120 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-28 04:11:05,728 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 285 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-28 04:11:05,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2024-11-28 04:11:05,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 204. [2024-11-28 04:11:05,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 99 states have (on average 1.3131313131313131) internal successors, (130), 106 states have internal predecessors, (130), 93 states have call successors, (93), 11 states have call predecessors, (93), 11 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-28 04:11:05,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 315 transitions. [2024-11-28 04:11:05,920 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 315 transitions. Word has length 55 [2024-11-28 04:11:05,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:11:05,920 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 315 transitions. [2024-11-28 04:11:05,921 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-11-28 04:11:05,921 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 315 transitions. [2024-11-28 04:11:05,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-28 04:11:05,922 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:11:05,923 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 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 04:11:05,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 04:11:06,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-28 04:11:06,127 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:11:06,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:11:06,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1162352819, now seen corresponding path program 1 times [2024-11-28 04:11:06,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:11:06,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068225737] [2024-11-28 04:11:06,129 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:11:06,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:11:06,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:11:06,508 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-28 04:11:06,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:11:06,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068225737] [2024-11-28 04:11:06,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068225737] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:11:06,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095069014] [2024-11-28 04:11:06,509 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:11:06,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:11:06,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:11:06,511 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:11:06,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 04:11:06,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:11:06,572 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 04:11:06,575 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:11:06,774 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-28 04:11:06,774 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:11:07,009 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-28 04:11:07,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095069014] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:11:07,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:11:07,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2024-11-28 04:11:07,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781036881] [2024-11-28 04:11:07,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:11:07,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 04:11:07,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:11:07,011 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 04:11:07,011 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-11-28 04:11:07,012 INFO L87 Difference]: Start difference. First operand 204 states and 315 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2024-11-28 04:11:07,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:11:07,639 INFO L93 Difference]: Finished difference Result 304 states and 465 transitions. [2024-11-28 04:11:07,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 04:11:07,639 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 59 [2024-11-28 04:11:07,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:11:07,642 INFO L225 Difference]: With dead ends: 304 [2024-11-28 04:11:07,642 INFO L226 Difference]: Without dead ends: 197 [2024-11-28 04:11:07,645 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2024-11-28 04:11:07,646 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 52 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:11:07,648 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 265 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:11:07,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-11-28 04:11:07,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 185. [2024-11-28 04:11:07,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 84 states have (on average 1.2619047619047619) internal successors, (106), 90 states have internal predecessors, (106), 89 states have call successors, (89), 11 states have call predecessors, (89), 11 states have return successors, (88), 83 states have call predecessors, (88), 88 states have call successors, (88) [2024-11-28 04:11:07,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 283 transitions. [2024-11-28 04:11:07,814 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 283 transitions. Word has length 59 [2024-11-28 04:11:07,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:11:07,815 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 283 transitions. [2024-11-28 04:11:07,815 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2024-11-28 04:11:07,815 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 283 transitions. [2024-11-28 04:11:07,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-28 04:11:07,817 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:11:07,817 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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 04:11:07,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 04:11:08,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:11:08,022 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:11:08,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:11:08,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1336337717, now seen corresponding path program 1 times [2024-11-28 04:11:08,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:11:08,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412021873] [2024-11-28 04:11:08,023 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:11:08,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:11:08,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:11:08,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1980771596] [2024-11-28 04:11:08,053 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:11:08,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:11:08,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:11:08,056 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:11:08,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 04:11:08,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:11:08,130 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 04:11:08,132 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:11:08,219 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-11-28 04:11:08,219 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:11:08,323 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-11-28 04:11:08,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:11:08,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412021873] [2024-11-28 04:11:08,323 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:11:08,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980771596] [2024-11-28 04:11:08,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980771596] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 04:11:08,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:11:08,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-28 04:11:08,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303830472] [2024-11-28 04:11:08,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:11:08,324 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:11:08,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:11:08,325 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:11:08,325 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:11:08,325 INFO L87 Difference]: Start difference. First operand 185 states and 283 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-28 04:11:08,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:11:08,530 INFO L93 Difference]: Finished difference Result 191 states and 288 transitions. [2024-11-28 04:11:08,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:11:08,531 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 66 [2024-11-28 04:11:08,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:11:08,534 INFO L225 Difference]: With dead ends: 191 [2024-11-28 04:11:08,534 INFO L226 Difference]: Without dead ends: 189 [2024-11-28 04:11:08,534 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:11:08,535 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:11:08,535 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 116 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:11:08,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2024-11-28 04:11:08,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2024-11-28 04:11:08,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 87 states have (on average 1.2528735632183907) internal successors, (109), 93 states have internal predecessors, (109), 89 states have call successors, (89), 12 states have call predecessors, (89), 12 states have return successors, (88), 83 states have call predecessors, (88), 88 states have call successors, (88) [2024-11-28 04:11:08,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 286 transitions. [2024-11-28 04:11:08,670 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 286 transitions. Word has length 66 [2024-11-28 04:11:08,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:11:08,671 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 286 transitions. [2024-11-28 04:11:08,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-28 04:11:08,671 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 286 transitions. [2024-11-28 04:11:08,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-28 04:11:08,673 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:11:08,673 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:11:08,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 04:11:08,877 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-28 04:11:08,878 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:11:08,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:11:08,878 INFO L85 PathProgramCache]: Analyzing trace with hash 947334894, now seen corresponding path program 1 times [2024-11-28 04:11:08,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:11:08,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386807988] [2024-11-28 04:11:08,878 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:11:08,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:11:08,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:11:08,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1073455757] [2024-11-28 04:11:08,906 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:11:08,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:11:08,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:11:08,908 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:11:08,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 04:11:09,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:11:09,005 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-11-28 04:11:09,009 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:11:10,632 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2024-11-28 04:11:10,632 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:11:12,134 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 33 proven. 25 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-11-28 04:11:12,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:11:12,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386807988] [2024-11-28 04:11:12,135 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:11:12,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073455757] [2024-11-28 04:11:12,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073455757] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:11:12,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:11:12,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2024-11-28 04:11:12,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082852374] [2024-11-28 04:11:12,135 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:11:12,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-28 04:11:12,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:11:12,137 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-28 04:11:12,138 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2024-11-28 04:11:12,138 INFO L87 Difference]: Start difference. First operand 189 states and 286 transitions. Second operand has 35 states, 32 states have (on average 1.5) internal successors, (48), 30 states have internal predecessors, (48), 12 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) [2024-11-28 04:11:21,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 04:11:23,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 04:11:25,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 04:11:37,360 WARN L539 Checker$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 04:11:39,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:11:39,332 INFO L93 Difference]: Finished difference Result 336 states and 527 transitions. [2024-11-28 04:11:39,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-11-28 04:11:39,333 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.5) internal successors, (48), 30 states have internal predecessors, (48), 12 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) Word has length 79 [2024-11-28 04:11:39,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:11:39,336 INFO L225 Difference]: With dead ends: 336 [2024-11-28 04:11:39,337 INFO L226 Difference]: Without dead ends: 332 [2024-11-28 04:11:39,339 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2242 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=1505, Invalid=6867, Unknown=0, NotChecked=0, Total=8372 [2024-11-28 04:11:39,340 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 240 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 307 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 1460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:11:39,341 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 559 Invalid, 1460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 1151 Invalid, 2 Unknown, 0 Unchecked, 15.1s Time] [2024-11-28 04:11:39,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2024-11-28 04:11:39,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 287. [2024-11-28 04:11:39,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 133 states have (on average 1.2857142857142858) internal successors, (171), 140 states have internal predecessors, (171), 137 states have call successors, (137), 16 states have call predecessors, (137), 16 states have return successors, (136), 130 states have call predecessors, (136), 136 states have call successors, (136) [2024-11-28 04:11:39,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 444 transitions. [2024-11-28 04:11:39,617 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 444 transitions. Word has length 79 [2024-11-28 04:11:39,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:11:39,617 INFO L471 AbstractCegarLoop]: Abstraction has 287 states and 444 transitions. [2024-11-28 04:11:39,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.5) internal successors, (48), 30 states have internal predecessors, (48), 12 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) [2024-11-28 04:11:39,618 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 444 transitions. [2024-11-28 04:11:39,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-28 04:11:39,619 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:11:39,619 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:11:39,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-28 04:11:39,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-28 04:11:39,820 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:11:39,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:11:39,821 INFO L85 PathProgramCache]: Analyzing trace with hash -47378145, now seen corresponding path program 1 times [2024-11-28 04:11:39,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:11:39,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110222623] [2024-11-28 04:11:39,821 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:11:39,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:11:39,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:11:40,352 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 24 proven. 16 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2024-11-28 04:11:40,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:11:40,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110222623] [2024-11-28 04:11:40,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110222623] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:11:40,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471122120] [2024-11-28 04:11:40,353 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:11:40,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:11:40,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:11:40,356 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:11:40,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 04:11:40,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:11:40,436 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 04:11:40,440 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:11:40,926 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 54 proven. 16 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2024-11-28 04:11:40,927 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:11:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 24 proven. 16 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2024-11-28 04:11:41,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471122120] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:11:41,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:11:41,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2024-11-28 04:11:41,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14845735] [2024-11-28 04:11:41,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:11:41,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 04:11:41,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:11:41,354 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 04:11:41,354 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2024-11-28 04:11:41,354 INFO L87 Difference]: Start difference. First operand 287 states and 444 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (38), 10 states have call predecessors, (38), 11 states have call successors, (38) [2024-11-28 04:11:42,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:11:42,865 INFO L93 Difference]: Finished difference Result 408 states and 636 transitions. [2024-11-28 04:11:42,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 04:11:42,866 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (38), 10 states have call predecessors, (38), 11 states have call successors, (38) Word has length 82 [2024-11-28 04:11:42,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:11:42,870 INFO L225 Difference]: With dead ends: 408 [2024-11-28 04:11:42,870 INFO L226 Difference]: Without dead ends: 262 [2024-11-28 04:11:42,871 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=313, Invalid=1169, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 04:11:42,872 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 84 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:11:42,872 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 376 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 04:11:42,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2024-11-28 04:11:43,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 261. [2024-11-28 04:11:43,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 120 states have (on average 1.275) internal successors, (153), 127 states have internal predecessors, (153), 125 states have call successors, (125), 15 states have call predecessors, (125), 15 states have return successors, (124), 118 states have call predecessors, (124), 124 states have call successors, (124) [2024-11-28 04:11:43,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 402 transitions. [2024-11-28 04:11:43,101 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 402 transitions. Word has length 82 [2024-11-28 04:11:43,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:11:43,101 INFO L471 AbstractCegarLoop]: Abstraction has 261 states and 402 transitions. [2024-11-28 04:11:43,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (38), 10 states have call predecessors, (38), 11 states have call successors, (38) [2024-11-28 04:11:43,102 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 402 transitions. [2024-11-28 04:11:43,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-28 04:11:43,103 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:11:43,103 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 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 04:11:43,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-28 04:11:43,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 04:11:43,304 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:11:43,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:11:43,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1643942970, now seen corresponding path program 1 times [2024-11-28 04:11:43,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:11:43,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980009829] [2024-11-28 04:11:43,305 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:11:43,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:11:43,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:11:43,733 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 26 proven. 15 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2024-11-28 04:11:43,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:11:43,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980009829] [2024-11-28 04:11:43,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980009829] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:11:43,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445139464] [2024-11-28 04:11:43,734 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:11:43,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:11:43,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:11:43,738 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:11:43,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 04:11:43,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:11:43,814 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 04:11:43,817 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:11:44,071 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 87 proven. 14 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2024-11-28 04:11:44,071 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:11:44,484 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 26 proven. 15 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2024-11-28 04:11:44,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445139464] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:11:44,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:11:44,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2024-11-28 04:11:44,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494979140] [2024-11-28 04:11:44,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:11:44,485 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 04:11:44,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:11:44,486 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 04:11:44,487 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2024-11-28 04:11:44,487 INFO L87 Difference]: Start difference. First operand 261 states and 402 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 10 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (36), 9 states have call predecessors, (36), 10 states have call successors, (36) [2024-11-28 04:11:45,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:11:45,277 INFO L93 Difference]: Finished difference Result 401 states and 612 transitions. [2024-11-28 04:11:45,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 04:11:45,278 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 10 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (36), 9 states have call predecessors, (36), 10 states have call successors, (36) Word has length 84 [2024-11-28 04:11:45,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:11:45,281 INFO L225 Difference]: With dead ends: 401 [2024-11-28 04:11:45,281 INFO L226 Difference]: Without dead ends: 213 [2024-11-28 04:11:45,282 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2024-11-28 04:11:45,283 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 24 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:11:45,283 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 341 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:11:45,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2024-11-28 04:11:45,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 211. [2024-11-28 04:11:45,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 107 states have (on average 1.2242990654205608) internal successors, (131), 108 states have internal predecessors, (131), 89 states have call successors, (89), 14 states have call predecessors, (89), 14 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2024-11-28 04:11:45,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 308 transitions. [2024-11-28 04:11:45,449 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 308 transitions. Word has length 84 [2024-11-28 04:11:45,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:11:45,450 INFO L471 AbstractCegarLoop]: Abstraction has 211 states and 308 transitions. [2024-11-28 04:11:45,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 10 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (36), 9 states have call predecessors, (36), 10 states have call successors, (36) [2024-11-28 04:11:45,450 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 308 transitions. [2024-11-28 04:11:45,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-28 04:11:45,451 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:11:45,451 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 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] [2024-11-28 04:11:45,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 04:11:45,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-28 04:11:45,652 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:11:45,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:11:45,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1572869691, now seen corresponding path program 2 times [2024-11-28 04:11:45,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:11:45,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927917353] [2024-11-28 04:11:45,653 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:11:45,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:11:45,680 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:11:45,680 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:11:46,233 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2024-11-28 04:11:46,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:11:46,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927917353] [2024-11-28 04:11:46,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927917353] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:11:46,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547964539] [2024-11-28 04:11:46,234 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:11:46,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:11:46,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:11:46,236 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:11:46,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 04:11:46,327 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:11:46,327 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:11:46,329 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 04:11:46,332 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:11:46,749 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 60 proven. 16 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2024-11-28 04:11:46,749 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:11:47,217 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 29 proven. 17 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2024-11-28 04:11:47,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547964539] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:11:47,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:11:47,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 28 [2024-11-28 04:11:47,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658843936] [2024-11-28 04:11:47,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:11:47,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 04:11:47,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:11:47,220 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 04:11:47,220 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2024-11-28 04:11:47,220 INFO L87 Difference]: Start difference. First operand 211 states and 308 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 25 states have internal predecessors, (51), 11 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2024-11-28 04:11:48,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:11:48,576 INFO L93 Difference]: Finished difference Result 245 states and 355 transitions. [2024-11-28 04:11:48,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 04:11:48,577 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 25 states have internal predecessors, (51), 11 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) Word has length 85 [2024-11-28 04:11:48,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:11:48,578 INFO L225 Difference]: With dead ends: 245 [2024-11-28 04:11:48,578 INFO L226 Difference]: Without dead ends: 130 [2024-11-28 04:11:48,580 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=409, Invalid=1661, Unknown=0, NotChecked=0, Total=2070 [2024-11-28 04:11:48,581 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 82 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:11:48,581 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 597 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 04:11:48,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-11-28 04:11:48,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 107. [2024-11-28 04:11:48,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 62 states have internal predecessors, (68), 33 states have call successors, (33), 12 states have call predecessors, (33), 12 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-28 04:11:48,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 133 transitions. [2024-11-28 04:11:48,644 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 133 transitions. Word has length 85 [2024-11-28 04:11:48,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:11:48,644 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 133 transitions. [2024-11-28 04:11:48,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 25 states have internal predecessors, (51), 11 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2024-11-28 04:11:48,645 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 133 transitions. [2024-11-28 04:11:48,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-28 04:11:48,645 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:11:48,645 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:11:48,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 04:11:48,846 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 04:11:48,846 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:11:48,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:11:48,847 INFO L85 PathProgramCache]: Analyzing trace with hash 230415200, now seen corresponding path program 3 times [2024-11-28 04:11:48,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:11:48,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714604156] [2024-11-28 04:11:48,847 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:11:48,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:11:48,878 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 04:11:48,878 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:11:49,599 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 26 proven. 16 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2024-11-28 04:11:49,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:11:49,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714604156] [2024-11-28 04:11:49,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714604156] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:11:49,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473026695] [2024-11-28 04:11:49,600 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:11:49,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:11:49,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:11:49,603 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:11:49,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 04:11:49,677 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 04:11:49,678 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:11:49,679 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 04:11:49,682 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:11:50,011 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 31 proven. 12 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2024-11-28 04:11:50,012 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:11:50,351 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2024-11-28 04:11:50,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473026695] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:11:50,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:11:50,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 8] total 24 [2024-11-28 04:11:50,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770094268] [2024-11-28 04:11:50,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:11:50,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 04:11:50,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:11:50,353 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 04:11:50,353 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2024-11-28 04:11:50,354 INFO L87 Difference]: Start difference. First operand 107 states and 133 transitions. Second operand has 24 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 20 states have internal predecessors, (45), 11 states have call successors, (36), 4 states have call predecessors, (36), 2 states have return successors, (35), 11 states have call predecessors, (35), 11 states have call successors, (35) [2024-11-28 04:11:51,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:11:51,738 INFO L93 Difference]: Finished difference Result 137 states and 164 transitions. [2024-11-28 04:11:51,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 04:11:51,738 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 20 states have internal predecessors, (45), 11 states have call successors, (36), 4 states have call predecessors, (36), 2 states have return successors, (35), 11 states have call predecessors, (35), 11 states have call successors, (35) Word has length 87 [2024-11-28 04:11:51,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:11:51,739 INFO L225 Difference]: With dead ends: 137 [2024-11-28 04:11:51,739 INFO L226 Difference]: Without dead ends: 58 [2024-11-28 04:11:51,741 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 167 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=253, Invalid=1229, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 04:11:51,742 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 55 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:11:51,742 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 387 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 04:11:51,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-28 04:11:51,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-11-28 04:11:51,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-28 04:11:51,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2024-11-28 04:11:51,769 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 87 [2024-11-28 04:11:51,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:11:51,769 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2024-11-28 04:11:51,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 20 states have internal predecessors, (45), 11 states have call successors, (36), 4 states have call predecessors, (36), 2 states have return successors, (35), 11 states have call predecessors, (35), 11 states have call successors, (35) [2024-11-28 04:11:51,769 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2024-11-28 04:11:51,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-28 04:11:51,770 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:11:51,770 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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 04:11:51,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-28 04:11:51,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 04:11:51,975 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:11:51,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:11:51,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1251272623, now seen corresponding path program 2 times [2024-11-28 04:11:51,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:11:51,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362618781] [2024-11-28 04:11:51,976 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:11:51,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:11:51,995 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:11:51,995 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:11:52,426 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2024-11-28 04:11:52,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:11:52,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362618781] [2024-11-28 04:11:52,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362618781] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:11:52,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238680254] [2024-11-28 04:11:52,427 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:11:52,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:11:52,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:11:52,430 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:11:52,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 04:11:52,519 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:11:52,519 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:11:52,521 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 04:11:52,524 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:11:52,908 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2024-11-28 04:11:52,908 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:11:53,462 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2024-11-28 04:11:53,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238680254] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:11:53,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:11:53,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 28 [2024-11-28 04:11:53,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504554689] [2024-11-28 04:11:53,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:11:53,463 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 04:11:53,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:11:53,464 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 04:11:53,465 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2024-11-28 04:11:53,465 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 28 states have internal predecessors, (47), 14 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (48), 12 states have call predecessors, (48), 13 states have call successors, (48) [2024-11-28 04:11:54,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:11:54,025 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2024-11-28 04:11:54,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 04:11:54,026 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 28 states have internal predecessors, (47), 14 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (48), 12 states have call predecessors, (48), 13 states have call successors, (48) Word has length 97 [2024-11-28 04:11:54,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:11:54,026 INFO L225 Difference]: With dead ends: 58 [2024-11-28 04:11:54,026 INFO L226 Difference]: Without dead ends: 0 [2024-11-28 04:11:54,027 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=215, Invalid=975, Unknown=0, NotChecked=0, Total=1190 [2024-11-28 04:11:54,028 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 38 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:11:54,028 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 384 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:11:54,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-28 04:11:54,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-28 04:11:54,029 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 04:11:54,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-28 04:11:54,030 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 97 [2024-11-28 04:11:54,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:11:54,030 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-28 04:11:54,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 28 states have internal predecessors, (47), 14 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (48), 12 states have call predecessors, (48), 13 states have call successors, (48) [2024-11-28 04:11:54,030 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-28 04:11:54,031 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-28 04:11:54,034 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-28 04:11:54,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 04:11:54,238 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 04:11:54,242 INFO L422 BasicCegarLoop]: Path program histogram: [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:11:54,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-28 04:11:59,903 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-28 04:11:59,937 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 04:11:59 BoogieIcfgContainer [2024-11-28 04:11:59,938 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-28 04:11:59,938 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-28 04:11:59,939 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-28 04:11:59,939 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-28 04:11:59,940 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:10:52" (3/4) ... [2024-11-28 04:11:59,943 INFO L146 WitnessPrinter]: Generating witness for correct program [2024-11-28 04:11:59,956 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2024-11-28 04:11:59,956 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-11-28 04:11:59,966 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2024-11-28 04:11:59,968 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2024-11-28 04:11:59,969 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-11-28 04:11:59,969 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-28 04:12:00,086 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/witness.graphml [2024-11-28 04:12:00,086 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/witness.yml [2024-11-28 04:12:00,086 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-28 04:12:00,088 INFO L158 Benchmark]: Toolchain (without parser) took 68384.79ms. Allocated memory was 142.6MB in the beginning and 343.9MB in the end (delta: 201.3MB). Free memory was 117.5MB in the beginning and 241.4MB in the end (delta: -123.9MB). Peak memory consumption was 73.6MB. Max. memory is 16.1GB. [2024-11-28 04:12:00,088 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 117.4MB. Free memory is still 74.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:12:00,089 INFO L158 Benchmark]: CACSL2BoogieTranslator took 325.87ms. Allocated memory is still 142.6MB. Free memory was 117.3MB in the beginning and 105.8MB in the end (delta: 11.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 04:12:00,090 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.42ms. Allocated memory is still 142.6MB. Free memory was 105.8MB in the beginning and 104.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:12:00,090 INFO L158 Benchmark]: Boogie Preprocessor took 46.54ms. Allocated memory is still 142.6MB. Free memory was 104.5MB in the beginning and 103.2MB in the end (delta: 1.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 04:12:00,091 INFO L158 Benchmark]: RCFGBuilder took 455.83ms. Allocated memory is still 142.6MB. Free memory was 103.2MB in the beginning and 92.0MB in the end (delta: 11.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 04:12:00,092 INFO L158 Benchmark]: TraceAbstraction took 67361.40ms. Allocated memory was 142.6MB in the beginning and 343.9MB in the end (delta: 201.3MB). Free memory was 91.3MB in the beginning and 249.6MB in the end (delta: -158.4MB). Peak memory consumption was 174.9MB. Max. memory is 16.1GB. [2024-11-28 04:12:00,094 INFO L158 Benchmark]: Witness Printer took 148.12ms. Allocated memory is still 343.9MB. Free memory was 249.6MB in the beginning and 241.4MB in the end (delta: 8.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 04:12:00,096 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 117.4MB. Free memory is still 74.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 325.87ms. Allocated memory is still 142.6MB. Free memory was 117.3MB in the beginning and 105.8MB in the end (delta: 11.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.42ms. Allocated memory is still 142.6MB. Free memory was 105.8MB in the beginning and 104.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 46.54ms. Allocated memory is still 142.6MB. Free memory was 104.5MB in the beginning and 103.2MB in the end (delta: 1.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 455.83ms. Allocated memory is still 142.6MB. Free memory was 103.2MB in the beginning and 92.0MB in the end (delta: 11.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 67361.40ms. Allocated memory was 142.6MB in the beginning and 343.9MB in the end (delta: 201.3MB). Free memory was 91.3MB in the beginning and 249.6MB in the end (delta: -158.4MB). Peak memory consumption was 174.9MB. Max. memory is 16.1GB. * Witness Printer took 148.12ms. Allocated memory is still 343.9MB. Free memory was 249.6MB in the beginning and 241.4MB in the end (delta: 8.2MB). 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, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 61.6s, OverallIterations: 18, TraceHistogramMax: 13, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 39.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 918 SdHoareTripleChecker+Valid, 20.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 864 mSDsluCounter, 4478 SdHoareTripleChecker+Invalid, 19.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3842 mSDsCounter, 948 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4347 IncrementalHoareTripleChecker+Invalid, 5297 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 948 mSolverCounterUnsat, 636 mSDtfsCounter, 4347 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1982 GetRequests, 1569 SyntacticMatches, 14 SemanticMatches, 399 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4006 ImplicationChecksByTransitivity, 21.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=287occurred in iteration=13, InterpolantAutomatonStates: 263, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.6s AutomataMinimizationTime, 18 MinimizatonAttempts, 236 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 14.9s InterpolantComputationTime, 1989 NumberOfCodeBlocks, 1943 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 2321 ConstructedInterpolants, 0 QuantifiedInterpolants, 8905 SizeOfPredicates, 46 NumberOfNonLiveVariables, 2587 ConjunctsInSsa, 314 ConjunctsInUnsatCore, 38 InterpolantComputations, 7 PerfectInterpolantSequences, 4542/4910 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: 42]: Loop Invariant Derived loop invariant: ((((((((((((((p == 0) && (a == c)) && (b == x)) && (q == 1)) && (k == 0)) && (s == 0)) && (1 <= x)) && (r == 1)) && (c == y)) && (((__int128) 2 * b) <= y)) && (((__int128) ((long long) 2 * x) + a) <= (((__int128) 2 * b) + 2))) || ((((((((((((p == 1) && (1 <= y)) && (a == c)) && (b == y)) && ((((long long) 2 * x) + y) <= (((__int128) 2 * c) + 2))) && (r == 0)) && (q == 0)) && (k == 0)) && (1 <= x)) && (a == x)) && (x <= 2)) && (s == 1))) || (((((((((((c == 0) && (p == 0)) && (a == y)) && (((__int128) b + 1) <= a)) && (b == x)) && (q == 1)) && (s == 0)) && (1 <= x)) && (r == 1)) && (2 == k)) && (((__int128) ((long long) 2 * x) + a) <= (((__int128) 2 * b) + 2)))) || (((((((((((c == 0) && ((y + ((__int128) k * y)) == ((__int128) b + x))) && (p == 1)) && (1 <= y)) && (b == y)) && (r == 0)) && (q == 0)) && (1 <= x)) && (a == x)) && (x <= 2)) && (s == 1))) - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: ((((((((((((((((d == 1) && (p == 0)) && (a == c)) && (b == x)) && (((__int128) b + 1) <= c)) && (b == v)) && (q == 1)) && (k == 0)) && (s == 0)) && (1 <= x)) && (r == 1)) && (c == y)) && (((__int128) ((long long) 2 * x) + a) <= (((__int128) 2 * b) + 2))) || (((((((((((((d == 1) && (p == 1)) && (1 <= y)) && (a == c)) && (b == v)) && (v == y)) && (r == 0)) && (q == 0)) && (k == 0)) && (b <= c)) && (a == x)) && (x <= 2)) && (s == 1))) || (((((((((((((p == 0) && (b == x)) && (((__int128) b + 1) <= c)) && (q == 1)) && (k == 0)) && (s == 0)) && (1 <= x)) && (r == 1)) && ((((__int128) b * d) + c) == ((__int128) a + v))) && (((__int128) 2 * b) == v)) && (c == y)) && (2 == d)) && (((__int128) ((long long) 2 * x) + c) <= (((__int128) 2 * b) + 2)))) || (((((((((((((p == 1) && (1 <= y)) && (b == y)) && (v <= c)) && (r == 0)) && (q == 0)) && (((long long) 3 * y) == ((__int128) b + x))) && (k == 0)) && (c <= 2)) && (((__int128) 2 * b) == v)) && (a == x)) && (2 == d)) && (s == 1))) - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: ((((((((((((((long long) x + 1) <= y) && (p == 1)) && (y <= 2)) && (b == 0)) && (r == 0)) && (1 <= x)) && (((__int128) 2 + q) == 0)) && (a == x)) && (s == 1)) || ((((((((b == 1) && (p == 0)) && (2 == y)) && (x == 1)) && (q == 1)) && (s == 0)) && (r == 1)) && (2 == a))) || ((((((((((p == 1) && (b == y)) && (1 <= b)) && (r == 0)) && (q == 0)) && (1 <= x)) && (a == x)) && ((((long long) 2 * x) + y) <= (2 + ((__int128) 2 * a)))) && (x <= 2)) && (s == 1))) || (((((((((y == ((a + ((__int128) s * y)) + ((__int128) q * x))) && (p == 0)) && (a == y)) && (a <= 2)) && (b == 0)) && (1 <= a)) && (1 <= x)) && (r == 1)) && (x <= 2))) RESULT: Ultimate proved your program to be correct! [2024-11-28 04:12:00,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88ef890e-cce8-49df-bcb4-b715eb18d399/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE