./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.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_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/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_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/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_884438dd-eb5a-4225-9402-b5a0eb00ee55/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 be176f230c0ddf2a166ae209d5d0fb467abe0ece694096a2cf73b073fb0117ce --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 23:30:37,896 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 23:30:37,991 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 23:30:38,002 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 23:30:38,002 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 23:30:38,045 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 23:30:38,049 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 23:30:38,049 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 23:30:38,050 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 23:30:38,050 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 23:30:38,050 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 23:30:38,050 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 23:30:38,050 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 23:30:38,050 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 23:30:38,050 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 23:30:38,051 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 23:30:38,051 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 23:30:38,051 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 23:30:38,051 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 23:30:38,051 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 23:30:38,051 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 23:30:38,051 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 23:30:38,051 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 23:30:38,051 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 23:30:38,051 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 23:30:38,052 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 23:30:38,052 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 23:30:38,052 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 23:30:38,052 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 23:30:38,052 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:30:38,052 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:30:38,052 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:30:38,052 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:30:38,055 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 23:30:38,056 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:30:38,056 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:30:38,056 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:30:38,056 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:30:38,056 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 23:30:38,056 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 23:30:38,057 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 23:30:38,057 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 23:30:38,057 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 23:30:38,057 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 23:30:38,057 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 23:30:38,058 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 23:30:38,058 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 23:30:38,058 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 23:30:38,058 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_884438dd-eb5a-4225-9402-b5a0eb00ee55/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 -> be176f230c0ddf2a166ae209d5d0fb467abe0ece694096a2cf73b073fb0117ce [2024-11-27 23:30:38,372 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 23:30:38,382 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 23:30:38,387 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 23:30:38,389 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 23:30:38,389 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 23:30:38,392 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c [2024-11-27 23:30:41,395 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/data/49fd709f4/7be0d88601ba485180bb1def1ccfd0e1/FLAGe9e7caaed [2024-11-27 23:30:41,741 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 23:30:41,742 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c [2024-11-27 23:30:41,752 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/data/49fd709f4/7be0d88601ba485180bb1def1ccfd0e1/FLAGe9e7caaed [2024-11-27 23:30:41,768 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/data/49fd709f4/7be0d88601ba485180bb1def1ccfd0e1 [2024-11-27 23:30:41,771 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 23:30:41,773 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 23:30:41,774 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 23:30:41,774 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 23:30:41,779 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 23:30:41,780 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:30:41" (1/1) ... [2024-11-27 23:30:41,781 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cb89734 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:30:41, skipping insertion in model container [2024-11-27 23:30:41,782 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:30:41" (1/1) ... [2024-11-27 23:30:41,821 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 23:30:41,993 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_884438dd-eb5a-4225-9402-b5a0eb00ee55/sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c[1995,2008] [2024-11-27 23:30:41,998 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_884438dd-eb5a-4225-9402-b5a0eb00ee55/sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c[2389,2402] [2024-11-27 23:30:42,051 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:30:42,060 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 23:30:42,074 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_884438dd-eb5a-4225-9402-b5a0eb00ee55/sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c[1995,2008] [2024-11-27 23:30:42,076 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_884438dd-eb5a-4225-9402-b5a0eb00ee55/sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c[2389,2402] [2024-11-27 23:30:42,138 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:30:42,163 INFO L204 MainTranslator]: Completed translation [2024-11-27 23:30:42,163 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:30:42 WrapperNode [2024-11-27 23:30:42,163 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 23:30:42,165 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 23:30:42,165 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 23:30:42,165 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 23:30:42,177 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:30:42" (1/1) ... [2024-11-27 23:30:42,190 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:30:42" (1/1) ... [2024-11-27 23:30:42,226 INFO L138 Inliner]: procedures = 27, calls = 20, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 211 [2024-11-27 23:30:42,230 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 23:30:42,230 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 23:30:42,230 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 23:30:42,230 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 23:30:42,242 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:30:42" (1/1) ... [2024-11-27 23:30:42,242 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:30:42" (1/1) ... [2024-11-27 23:30:42,248 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:30:42" (1/1) ... [2024-11-27 23:30:42,273 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]. [2024-11-27 23:30:42,273 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:30:42" (1/1) ... [2024-11-27 23:30:42,277 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:30:42" (1/1) ... [2024-11-27 23:30:42,283 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:30:42" (1/1) ... [2024-11-27 23:30:42,285 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:30:42" (1/1) ... [2024-11-27 23:30:42,289 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:30:42" (1/1) ... [2024-11-27 23:30:42,291 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:30:42" (1/1) ... [2024-11-27 23:30:42,292 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:30:42" (1/1) ... [2024-11-27 23:30:42,295 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 23:30:42,296 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 23:30:42,296 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 23:30:42,296 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 23:30:42,297 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:30:42" (1/1) ... [2024-11-27 23:30:42,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:30:42,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:30:42,336 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 23:30:42,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 23:30:42,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 23:30:42,374 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-27 23:30:42,374 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-27 23:30:42,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 23:30:42,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 23:30:42,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 23:30:42,374 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-27 23:30:42,375 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-27 23:30:42,459 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 23:30:42,461 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 23:30:42,987 INFO L? ?]: Removed 81 outVars from TransFormulas that were not future-live. [2024-11-27 23:30:42,987 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 23:30:43,005 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 23:30:43,005 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-27 23:30:43,006 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:30:43 BoogieIcfgContainer [2024-11-27 23:30:43,007 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 23:30:43,009 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 23:30:43,010 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 23:30:43,016 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 23:30:43,017 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 11:30:41" (1/3) ... [2024-11-27 23:30:43,019 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7891eae1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:30:43, skipping insertion in model container [2024-11-27 23:30:43,019 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:30:42" (2/3) ... [2024-11-27 23:30:43,021 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7891eae1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:30:43, skipping insertion in model container [2024-11-27 23:30:43,021 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:30:43" (3/3) ... [2024-11-27 23:30:43,023 INFO L128 eAbstractionObserver]: Analyzing ICFG square_8+soft_float_1-2a.c.cil.c [2024-11-27 23:30:43,041 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 23:30:43,043 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG square_8+soft_float_1-2a.c.cil.c that has 3 procedures, 103 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2024-11-27 23:30:43,099 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 23:30:43,111 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;@6aa95b78, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 23:30:43,112 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-27 23:30:43,116 INFO L276 IsEmpty]: Start isEmpty. Operand has 103 states, 90 states have (on average 1.5888888888888888) internal successors, (143), 94 states have internal predecessors, (143), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-27 23:30:43,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-27 23:30:43,123 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:30:43,124 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:30:43,124 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:30:43,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:30:43,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1530844763, now seen corresponding path program 1 times [2024-11-27 23:30:43,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:30:43,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800761787] [2024-11-27 23:30:43,142 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:30:43,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:30:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:30:43,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:30:43,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:30:43,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800761787] [2024-11-27 23:30:43,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800761787] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:30:43,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:30:43,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 23:30:43,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928097132] [2024-11-27 23:30:43,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:30:43,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-27 23:30:43,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:30:43,348 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-27 23:30:43,348 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-27 23:30:43,352 INFO L87 Difference]: Start difference. First operand has 103 states, 90 states have (on average 1.5888888888888888) internal successors, (143), 94 states have internal predecessors, (143), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2024-11-27 23:30:43,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:30:43,381 INFO L93 Difference]: Finished difference Result 201 states and 318 transitions. [2024-11-27 23:30:43,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-27 23:30:43,384 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) Word has length 7 [2024-11-27 23:30:43,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:30:43,392 INFO L225 Difference]: With dead ends: 201 [2024-11-27 23:30:43,392 INFO L226 Difference]: Without dead ends: 96 [2024-11-27 23:30:43,396 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-27 23:30:43,399 INFO L435 NwaCegarLoop]: 149 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, 149 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 [2024-11-27 23:30:43,400 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 23:30:43,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-27 23:30:43,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2024-11-27 23:30:43,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 84 states have (on average 1.4880952380952381) internal successors, (125), 87 states have internal predecessors, (125), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-27 23:30:43,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 140 transitions. [2024-11-27 23:30:43,444 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 140 transitions. Word has length 7 [2024-11-27 23:30:43,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:30:43,444 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 140 transitions. [2024-11-27 23:30:43,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2024-11-27 23:30:43,445 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 140 transitions. [2024-11-27 23:30:43,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-27 23:30:43,445 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:30:43,445 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:30:43,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 23:30:43,446 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:30:43,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:30:43,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1530904345, now seen corresponding path program 1 times [2024-11-27 23:30:43,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:30:43,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083646691] [2024-11-27 23:30:43,447 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:30:43,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:30:43,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 23:30:43,468 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-27 23:30:43,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 23:30:43,505 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-27 23:30:43,505 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-27 23:30:43,507 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2024-11-27 23:30:43,510 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-11-27 23:30:43,510 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 23:30:43,514 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-27 23:30:43,526 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-27 23:30:43,529 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.11 11:30:43 BoogieIcfgContainer [2024-11-27 23:30:43,529 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-27 23:30:43,530 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-27 23:30:43,530 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-27 23:30:43,530 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-27 23:30:43,531 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:30:43" (3/4) ... [2024-11-27 23:30:43,533 INFO L149 WitnessPrinter]: No result that supports witness generation found [2024-11-27 23:30:43,534 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-27 23:30:43,536 INFO L158 Benchmark]: Toolchain (without parser) took 1762.42ms. Allocated memory is still 117.4MB. Free memory was 92.6MB in the beginning and 81.0MB in the end (delta: 11.6MB). Peak memory consumption was 12.9MB. Max. memory is 16.1GB. [2024-11-27 23:30:43,536 INFO L158 Benchmark]: CDTParser took 0.43ms. Allocated memory is still 167.8MB. Free memory is still 103.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 23:30:43,538 INFO L158 Benchmark]: CACSL2BoogieTranslator took 389.65ms. Allocated memory is still 117.4MB. Free memory was 92.2MB in the beginning and 77.3MB in the end (delta: 14.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-27 23:30:43,538 INFO L158 Benchmark]: Boogie Procedure Inliner took 65.22ms. Allocated memory is still 117.4MB. Free memory was 77.3MB in the beginning and 75.4MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 23:30:43,538 INFO L158 Benchmark]: Boogie Preprocessor took 65.09ms. Allocated memory is still 117.4MB. Free memory was 75.4MB in the beginning and 73.2MB in the end (delta: 2.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 23:30:43,538 INFO L158 Benchmark]: RCFGBuilder took 711.00ms. Allocated memory is still 117.4MB. Free memory was 73.2MB in the beginning and 49.5MB in the end (delta: 23.6MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-11-27 23:30:43,539 INFO L158 Benchmark]: TraceAbstraction took 519.74ms. Allocated memory is still 117.4MB. Free memory was 49.2MB in the beginning and 81.6MB in the end (delta: -32.5MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 23:30:43,539 INFO L158 Benchmark]: Witness Printer took 4.38ms. Allocated memory is still 117.4MB. Free memory was 81.6MB in the beginning and 81.0MB in the end (delta: 606.5kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 23:30:43,543 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.43ms. Allocated memory is still 167.8MB. Free memory is still 103.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 389.65ms. Allocated memory is still 117.4MB. Free memory was 92.2MB in the beginning and 77.3MB in the end (delta: 14.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 65.22ms. Allocated memory is still 117.4MB. Free memory was 77.3MB in the beginning and 75.4MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 65.09ms. Allocated memory is still 117.4MB. Free memory was 75.4MB in the beginning and 73.2MB in the end (delta: 2.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 711.00ms. Allocated memory is still 117.4MB. Free memory was 73.2MB in the beginning and 49.5MB in the end (delta: 23.6MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 519.74ms. Allocated memory is still 117.4MB. Free memory was 49.2MB in the beginning and 81.6MB in the end (delta: -32.5MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 4.38ms. Allocated memory is still 117.4MB. Free memory was 81.6MB in the beginning and 81.0MB in the end (delta: 606.5kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 48]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 40, overapproximation of someBinaryFLOATComparisonOperation at line 47, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L403] COND TRUE __VERIFIER_nondet_int() [L404] CALL main1() [L39] float IN = __VERIFIER_nondet_float(); [L40] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L34] COND FALSE !(!cond) [L40] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L42] float x = IN; [L44-L45] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; [L47] COND TRUE !(result >= 0.0f && result < 1.5f) [L48] reach_error() - UnprovableResult [Line: 61]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 103 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 149 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 0 IncrementalHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 149 mSDtfsCounter, 0 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=103occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2024-11-27 23:30:43,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/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 Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/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_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/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 be176f230c0ddf2a166ae209d5d0fb467abe0ece694096a2cf73b073fb0117ce --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 23:30:46,407 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 23:30:46,561 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-27 23:30:46,572 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 23:30:46,573 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 23:30:46,609 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 23:30:46,610 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 23:30:46,610 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 23:30:46,610 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 23:30:46,610 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 23:30:46,610 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 23:30:46,611 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 23:30:46,611 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 23:30:46,611 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 23:30:46,611 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 23:30:46,611 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 23:30:46,611 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 23:30:46,612 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 23:30:46,612 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 23:30:46,612 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 23:30:46,612 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 23:30:46,612 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 23:30:46,612 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 23:30:46,612 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-27 23:30:46,612 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-27 23:30:46,613 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-27 23:30:46,613 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 23:30:46,613 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 23:30:46,613 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 23:30:46,613 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 23:30:46,613 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 23:30:46,613 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:30:46,613 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:30:46,614 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:30:46,614 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:30:46,614 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 23:30:46,614 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:30:46,614 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:30:46,614 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:30:46,614 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:30:46,614 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 23:30:46,615 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 23:30:46,615 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 23:30:46,615 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 23:30:46,615 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-27 23:30:46,615 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-27 23:30:46,615 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 23:30:46,615 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 23:30:46,615 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 23:30:46,615 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 23:30:46,615 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_884438dd-eb5a-4225-9402-b5a0eb00ee55/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 -> be176f230c0ddf2a166ae209d5d0fb467abe0ece694096a2cf73b073fb0117ce [2024-11-27 23:30:47,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 23:30:47,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 23:30:47,040 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 23:30:47,042 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 23:30:47,043 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 23:30:47,044 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c [2024-11-27 23:30:50,362 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/data/107572f56/819eb4c08939401b8e6ab26958bceed1/FLAGed304bffc [2024-11-27 23:30:50,715 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 23:30:50,716 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c [2024-11-27 23:30:50,726 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/data/107572f56/819eb4c08939401b8e6ab26958bceed1/FLAGed304bffc [2024-11-27 23:30:50,743 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/data/107572f56/819eb4c08939401b8e6ab26958bceed1 [2024-11-27 23:30:50,746 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 23:30:50,748 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 23:30:50,749 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 23:30:50,749 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 23:30:50,755 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 23:30:50,756 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:30:50" (1/1) ... [2024-11-27 23:30:50,757 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@219c4cad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:30:50, skipping insertion in model container [2024-11-27 23:30:50,757 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:30:50" (1/1) ... [2024-11-27 23:30:50,793 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 23:30:51,040 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_884438dd-eb5a-4225-9402-b5a0eb00ee55/sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c[1995,2008] [2024-11-27 23:30:51,052 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_884438dd-eb5a-4225-9402-b5a0eb00ee55/sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c[2389,2402] [2024-11-27 23:30:51,161 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:30:51,183 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 23:30:51,205 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_884438dd-eb5a-4225-9402-b5a0eb00ee55/sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c[1995,2008] [2024-11-27 23:30:51,208 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_884438dd-eb5a-4225-9402-b5a0eb00ee55/sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c[2389,2402] [2024-11-27 23:30:51,278 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:30:51,301 INFO L204 MainTranslator]: Completed translation [2024-11-27 23:30:51,302 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:30:51 WrapperNode [2024-11-27 23:30:51,302 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 23:30:51,304 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 23:30:51,304 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 23:30:51,304 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 23:30:51,314 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:30:51" (1/1) ... [2024-11-27 23:30:51,334 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:30:51" (1/1) ... [2024-11-27 23:30:51,377 INFO L138 Inliner]: procedures = 28, calls = 20, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 168 [2024-11-27 23:30:51,377 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 23:30:51,378 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 23:30:51,378 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 23:30:51,378 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 23:30:51,391 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:30:51" (1/1) ... [2024-11-27 23:30:51,392 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:30:51" (1/1) ... [2024-11-27 23:30:51,400 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:30:51" (1/1) ... [2024-11-27 23:30:51,426 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]. [2024-11-27 23:30:51,427 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:30:51" (1/1) ... [2024-11-27 23:30:51,427 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:30:51" (1/1) ... [2024-11-27 23:30:51,444 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:30:51" (1/1) ... [2024-11-27 23:30:51,445 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:30:51" (1/1) ... [2024-11-27 23:30:51,458 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:30:51" (1/1) ... [2024-11-27 23:30:51,460 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:30:51" (1/1) ... [2024-11-27 23:30:51,466 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:30:51" (1/1) ... [2024-11-27 23:30:51,474 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 23:30:51,476 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 23:30:51,476 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 23:30:51,476 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 23:30:51,478 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:30:51" (1/1) ... [2024-11-27 23:30:51,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:30:51,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:30:51,514 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 23:30:51,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 23:30:51,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 23:30:51,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-27 23:30:51,553 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-27 23:30:51,554 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-27 23:30:51,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 23:30:51,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 23:30:51,554 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-27 23:30:51,554 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-27 23:30:51,660 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 23:30:51,662 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 23:30:56,476 INFO L? ?]: Removed 65 outVars from TransFormulas that were not future-live. [2024-11-27 23:30:56,476 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 23:30:56,489 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 23:30:56,489 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-27 23:30:56,490 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:30:56 BoogieIcfgContainer [2024-11-27 23:30:56,490 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 23:30:56,493 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 23:30:56,493 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 23:30:56,499 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 23:30:56,499 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 11:30:50" (1/3) ... [2024-11-27 23:30:56,500 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25b1a9eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:30:56, skipping insertion in model container [2024-11-27 23:30:56,500 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:30:51" (2/3) ... [2024-11-27 23:30:56,500 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25b1a9eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:30:56, skipping insertion in model container [2024-11-27 23:30:56,500 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:30:56" (3/3) ... [2024-11-27 23:30:56,501 INFO L128 eAbstractionObserver]: Analyzing ICFG square_8+soft_float_1-2a.c.cil.c [2024-11-27 23:30:56,519 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 23:30:56,520 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG square_8+soft_float_1-2a.c.cil.c that has 3 procedures, 79 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2024-11-27 23:30:56,577 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 23:30:56,598 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;@7be44b13, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 23:30:56,598 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-27 23:30:56,604 INFO L276 IsEmpty]: Start isEmpty. Operand has 79 states, 66 states have (on average 1.606060606060606) internal successors, (106), 70 states have internal predecessors, (106), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-27 23:30:56,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-27 23:30:56,614 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:30:56,615 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:30:56,616 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:30:56,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:30:56,623 INFO L85 PathProgramCache]: Analyzing trace with hash 78502818, now seen corresponding path program 1 times [2024-11-27 23:30:56,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:30:56,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [356677695] [2024-11-27 23:30:56,639 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:30:56,640 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-27 23:30:56,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/mathsat [2024-11-27 23:30:56,643 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-27 23:30:56,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-11-27 23:30:57,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:30:57,262 INFO L256 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-27 23:30:57,265 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:30:57,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:30:57,282 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:30:57,283 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:30:57,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [356677695] [2024-11-27 23:30:57,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [356677695] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:30:57,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:30:57,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 23:30:57,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32704456] [2024-11-27 23:30:57,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:30:57,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-27 23:30:57,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:30:57,312 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-27 23:30:57,312 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-27 23:30:57,315 INFO L87 Difference]: Start difference. First operand has 79 states, 66 states have (on average 1.606060606060606) internal successors, (106), 70 states have internal predecessors, (106), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2024-11-27 23:30:57,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:30:57,348 INFO L93 Difference]: Finished difference Result 153 states and 244 transitions. [2024-11-27 23:30:57,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-27 23:30:57,350 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) Word has length 7 [2024-11-27 23:30:57,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:30:57,357 INFO L225 Difference]: With dead ends: 153 [2024-11-27 23:30:57,357 INFO L226 Difference]: Without dead ends: 72 [2024-11-27 23:30:57,361 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-27 23:30:57,364 INFO L435 NwaCegarLoop]: 114 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, 114 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 [2024-11-27 23:30:57,365 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 23:30:57,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-27 23:30:57,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-11-27 23:30:57,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 60 states have (on average 1.5) internal successors, (90), 63 states have internal predecessors, (90), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-27 23:30:57,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 105 transitions. [2024-11-27 23:30:57,412 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 105 transitions. Word has length 7 [2024-11-27 23:30:57,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:30:57,412 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 105 transitions. [2024-11-27 23:30:57,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2024-11-27 23:30:57,412 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 105 transitions. [2024-11-27 23:30:57,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-27 23:30:57,413 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:30:57,413 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:30:57,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-11-27 23:30:57,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-27 23:30:57,614 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:30:57,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:30:57,615 INFO L85 PathProgramCache]: Analyzing trace with hash 78562400, now seen corresponding path program 1 times [2024-11-27 23:30:57,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:30:57,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [6018009] [2024-11-27 23:30:57,615 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:30:57,615 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-27 23:30:57,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/mathsat [2024-11-27 23:30:57,618 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-27 23:30:57,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-11-27 23:32:34,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:34,160 INFO L256 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 23:32:34,162 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:42,903 WARN L286 SmtUtils]: Spent 8.22s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 23:32:51,025 WARN L286 SmtUtils]: Spent 8.12s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 23:32:59,262 WARN L286 SmtUtils]: Spent 8.24s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 23:33:03,376 WARN L851 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (= (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) |c_ULTIMATE.start_main1_~result~0#1|)))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2024-11-27 23:33:19,720 WARN L286 SmtUtils]: Spent 8.21s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 23:33:27,949 WARN L286 SmtUtils]: Spent 8.23s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 23:33:36,081 WARN L286 SmtUtils]: Spent 8.13s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 23:33:48,382 WARN L286 SmtUtils]: Spent 8.24s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 23:33:56,450 WARN L286 SmtUtils]: Spent 8.07s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 23:34:04,573 WARN L286 SmtUtils]: Spent 8.12s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 23:34:08,695 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) roundNearestTiesToEven 1.0)) (.cse1 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0))) (.cse2 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0))) (.cse3 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0))) (.cse4 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)))) (or (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (not (fp.lt (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) ((_ to_fp 8 24) roundNearestTiesToEven (/ 3.0 2.0)))))) (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (not (fp.geq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (_ +zero 8 24))))))) is different from false [2024-11-27 23:34:12,751 WARN L873 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) roundNearestTiesToEven 1.0)) (.cse1 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0))) (.cse2 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0))) (.cse3 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0))) (.cse4 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)))) (or (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (not (fp.lt (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) ((_ to_fp 8 24) roundNearestTiesToEven (/ 3.0 2.0)))))) (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (not (fp.geq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (_ +zero 8 24))))))) is different from true [2024-11-27 23:34:12,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:34:12,752 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:34:12,752 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:34:12,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [6018009] [2024-11-27 23:34:12,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [6018009] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:34:12,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:34:12,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 23:34:12,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099883059] [2024-11-27 23:34:12,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:34:12,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 23:34:12,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:34:12,756 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 23:34:12,757 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2024-11-27 23:34:12,758 INFO L87 Difference]: Start difference. First operand 72 states and 105 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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) [2024-11-27 23:34:17,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.21s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 23:34:21,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 23:34:25,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 23:34:25,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:34:25,603 INFO L93 Difference]: Finished difference Result 72 states and 105 transitions. [2024-11-27 23:34:25,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 23:34:25,604 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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) Word has length 7 [2024-11-27 23:34:25,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:34:25,606 INFO L225 Difference]: With dead ends: 72 [2024-11-27 23:34:25,606 INFO L226 Difference]: Without dead ends: 67 [2024-11-27 23:34:25,606 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2024-11-27 23:34:25,607 INFO L435 NwaCegarLoop]: 100 mSDtfsCounter, 99 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2024-11-27 23:34:25,608 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 268 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 3 Unknown, 210 Unchecked, 12.8s Time] [2024-11-27 23:34:25,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-27 23:34:25,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-11-27 23:34:25,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 56 states have (on average 1.5178571428571428) internal successors, (85), 58 states have internal predecessors, (85), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-27 23:34:25,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 100 transitions. [2024-11-27 23:34:25,619 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 100 transitions. Word has length 7 [2024-11-27 23:34:25,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:34:25,619 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 100 transitions. [2024-11-27 23:34:25,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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) [2024-11-27 23:34:25,620 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 100 transitions. [2024-11-27 23:34:25,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-27 23:34:25,621 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:34:25,622 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:34:25,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2024-11-27 23:34:25,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-27 23:34:25,822 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:34:25,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:34:25,823 INFO L85 PathProgramCache]: Analyzing trace with hash -531498825, now seen corresponding path program 1 times [2024-11-27 23:34:25,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:34:25,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1755618776] [2024-11-27 23:34:25,824 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:34:25,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:34:25,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:34:25,826 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:34:25,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 23:34:25,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:34:25,898 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 23:34:25,903 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:34:26,820 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-27 23:34:26,820 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:34:27,362 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-27 23:34:27,362 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:34:27,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755618776] [2024-11-27 23:34:27,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755618776] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:34:27,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:34:27,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-11-27 23:34:27,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826914812] [2024-11-27 23:34:27,363 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:34:27,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 23:34:27,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:34:27,365 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 23:34:27,365 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-27 23:34:27,365 INFO L87 Difference]: Start difference. First operand 67 states and 100 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 23:34:29,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:34:29,029 INFO L93 Difference]: Finished difference Result 144 states and 222 transitions. [2024-11-27 23:34:29,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 23:34:29,030 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2024-11-27 23:34:29,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:34:29,033 INFO L225 Difference]: With dead ends: 144 [2024-11-27 23:34:29,033 INFO L226 Difference]: Without dead ends: 99 [2024-11-27 23:34:29,034 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-27 23:34:29,035 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 31 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-27 23:34:29,035 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 583 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-27 23:34:29,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-27 23:34:29,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2024-11-27 23:34:29,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 82 states have (on average 1.475609756097561) internal successors, (121), 85 states have internal predecessors, (121), 11 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-27 23:34:29,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 146 transitions. [2024-11-27 23:34:29,072 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 146 transitions. Word has length 33 [2024-11-27 23:34:29,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:34:29,075 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 146 transitions. [2024-11-27 23:34:29,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 23:34:29,075 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 146 transitions. [2024-11-27 23:34:29,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-27 23:34:29,077 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:34:29,077 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:34:29,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-27 23:34:29,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:34:29,278 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:34:29,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:34:29,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1740441323, now seen corresponding path program 1 times [2024-11-27 23:34:29,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:34:29,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1915357219] [2024-11-27 23:34:29,279 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:34:29,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:34:29,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:34:29,281 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:34:29,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 23:34:29,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:34:29,355 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 23:34:29,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:34:30,723 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 23:34:30,725 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:34:31,519 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-27 23:34:31,520 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:34:31,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915357219] [2024-11-27 23:34:31,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915357219] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:34:31,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:34:31,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 12 [2024-11-27 23:34:31,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192409086] [2024-11-27 23:34:31,520 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:34:31,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-27 23:34:31,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:34:31,522 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-27 23:34:31,522 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-27 23:34:31,523 INFO L87 Difference]: Start difference. First operand 97 states and 146 transitions. Second operand has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-27 23:34:35,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:34:35,045 INFO L93 Difference]: Finished difference Result 229 states and 364 transitions. [2024-11-27 23:34:35,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 23:34:35,047 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 36 [2024-11-27 23:34:35,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:34:35,050 INFO L225 Difference]: With dead ends: 229 [2024-11-27 23:34:35,053 INFO L226 Difference]: Without dead ends: 163 [2024-11-27 23:34:35,054 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-27 23:34:35,057 INFO L435 NwaCegarLoop]: 147 mSDtfsCounter, 58 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 1203 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2024-11-27 23:34:35,058 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 1203 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2024-11-27 23:34:35,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-11-27 23:34:35,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 125. [2024-11-27 23:34:35,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 104 states have (on average 1.3846153846153846) internal successors, (144), 104 states have internal predecessors, (144), 16 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (33), 20 states have call predecessors, (33), 15 states have call successors, (33) [2024-11-27 23:34:35,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 193 transitions. [2024-11-27 23:34:35,100 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 193 transitions. Word has length 36 [2024-11-27 23:34:35,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:34:35,101 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 193 transitions. [2024-11-27 23:34:35,101 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-27 23:34:35,102 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 193 transitions. [2024-11-27 23:34:35,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-27 23:34:35,104 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:34:35,104 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:34:35,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-27 23:34:35,304 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:34:35,305 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:34:35,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:34:35,305 INFO L85 PathProgramCache]: Analyzing trace with hash 748537497, now seen corresponding path program 1 times [2024-11-27 23:34:35,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:34:35,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1430927658] [2024-11-27 23:34:35,306 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:34:35,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:34:35,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:34:35,308 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:34:35,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 23:34:35,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:34:35,388 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 23:34:35,390 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:34:35,659 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-27 23:34:35,660 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:34:35,660 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:34:35,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430927658] [2024-11-27 23:34:35,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430927658] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:34:35,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:34:35,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 23:34:35,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042360976] [2024-11-27 23:34:35,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:34:35,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:34:35,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:34:35,662 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:34:35,662 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:34:35,663 INFO L87 Difference]: Start difference. First operand 125 states and 193 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 23:34:36,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:34:36,096 INFO L93 Difference]: Finished difference Result 239 states and 370 transitions. [2024-11-27 23:34:36,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:34:36,097 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2024-11-27 23:34:36,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:34:36,099 INFO L225 Difference]: With dead ends: 239 [2024-11-27 23:34:36,099 INFO L226 Difference]: Without dead ends: 118 [2024-11-27 23:34:36,101 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:34:36,102 INFO L435 NwaCegarLoop]: 91 mSDtfsCounter, 22 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-27 23:34:36,102 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 257 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-27 23:34:36,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-27 23:34:36,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 108. [2024-11-27 23:34:36,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 90 states have (on average 1.3888888888888888) internal successors, (125), 94 states have internal predecessors, (125), 12 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (23), 13 states have call predecessors, (23), 11 states have call successors, (23) [2024-11-27 23:34:36,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 160 transitions. [2024-11-27 23:34:36,120 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 160 transitions. Word has length 39 [2024-11-27 23:34:36,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:34:36,120 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 160 transitions. [2024-11-27 23:34:36,121 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 23:34:36,121 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 160 transitions. [2024-11-27 23:34:36,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-27 23:34:36,122 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:34:36,123 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:34:36,134 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-27 23:34:36,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:34:36,323 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:34:36,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:34:36,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1688699891, now seen corresponding path program 1 times [2024-11-27 23:34:36,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:34:36,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [560320110] [2024-11-27 23:34:36,324 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:34:36,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:34:36,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:34:36,326 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:34:36,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 23:34:36,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:34:36,389 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-27 23:34:36,391 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:34:38,391 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 23:34:38,391 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:34:39,656 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-27 23:34:39,656 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:34:39,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560320110] [2024-11-27 23:34:39,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560320110] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 23:34:39,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:34:39,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2024-11-27 23:34:39,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072906582] [2024-11-27 23:34:39,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:34:39,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 23:34:39,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:34:39,658 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 23:34:39,658 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-11-27 23:34:39,658 INFO L87 Difference]: Start difference. First operand 108 states and 160 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:34:41,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:34:41,611 INFO L93 Difference]: Finished difference Result 226 states and 336 transitions. [2024-11-27 23:34:41,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 23:34:41,612 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2024-11-27 23:34:41,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:34:41,614 INFO L225 Difference]: With dead ends: 226 [2024-11-27 23:34:41,615 INFO L226 Difference]: Without dead ends: 171 [2024-11-27 23:34:41,616 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-11-27 23:34:41,617 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 37 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-27 23:34:41,618 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 425 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-27 23:34:41,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-11-27 23:34:41,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 129. [2024-11-27 23:34:41,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 111 states have (on average 1.3423423423423424) internal successors, (149), 112 states have internal predecessors, (149), 12 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (23), 16 states have call predecessors, (23), 11 states have call successors, (23) [2024-11-27 23:34:41,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 184 transitions. [2024-11-27 23:34:41,647 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 184 transitions. Word has length 40 [2024-11-27 23:34:41,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:34:41,648 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 184 transitions. [2024-11-27 23:34:41,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:34:41,648 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 184 transitions. [2024-11-27 23:34:41,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-27 23:34:41,650 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:34:41,650 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:34:41,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-27 23:34:41,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:34:41,851 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:34:41,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:34:41,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1631441589, now seen corresponding path program 1 times [2024-11-27 23:34:41,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:34:41,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [761059749] [2024-11-27 23:34:41,851 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:34:41,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:34:41,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:34:41,856 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:34:41,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 23:34:41,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:34:41,913 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 23:34:41,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:34:42,669 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-27 23:34:42,670 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:34:42,670 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:34:42,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761059749] [2024-11-27 23:34:42,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761059749] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:34:42,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:34:42,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-27 23:34:42,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567156687] [2024-11-27 23:34:42,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:34:42,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 23:34:42,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:34:42,671 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 23:34:42,671 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-27 23:34:42,672 INFO L87 Difference]: Start difference. First operand 129 states and 184 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:34:43,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:34:43,848 INFO L93 Difference]: Finished difference Result 228 states and 334 transitions. [2024-11-27 23:34:43,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 23:34:43,849 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2024-11-27 23:34:43,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:34:43,851 INFO L225 Difference]: With dead ends: 228 [2024-11-27 23:34:43,851 INFO L226 Difference]: Without dead ends: 167 [2024-11-27 23:34:43,852 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-27 23:34:43,853 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 30 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-27 23:34:43,853 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 499 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-27 23:34:43,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-11-27 23:34:43,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2024-11-27 23:34:43,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 143 states have (on average 1.3496503496503496) internal successors, (193), 146 states have internal predecessors, (193), 16 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (27), 20 states have call predecessors, (27), 15 states have call successors, (27) [2024-11-27 23:34:43,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 236 transitions. [2024-11-27 23:34:43,872 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 236 transitions. Word has length 40 [2024-11-27 23:34:43,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:34:43,872 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 236 transitions. [2024-11-27 23:34:43,873 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:34:43,873 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 236 transitions. [2024-11-27 23:34:43,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-27 23:34:43,875 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:34:43,875 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:34:43,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-27 23:34:44,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:34:44,076 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:34:44,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:34:44,077 INFO L85 PathProgramCache]: Analyzing trace with hash 923141631, now seen corresponding path program 2 times [2024-11-27 23:34:44,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:34:44,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [122906967] [2024-11-27 23:34:44,077 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:34:44,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:34:44,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:34:44,080 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:34:44,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 23:34:44,150 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 23:34:44,151 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:34:44,152 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 23:34:44,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:34:44,915 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 23:34:44,915 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:34:44,915 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:34:44,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122906967] [2024-11-27 23:34:44,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122906967] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:34:44,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:34:44,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-27 23:34:44,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251267933] [2024-11-27 23:34:44,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:34:44,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 23:34:44,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:34:44,917 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 23:34:44,917 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-27 23:34:44,917 INFO L87 Difference]: Start difference. First operand 165 states and 236 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:34:46,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:34:46,226 INFO L93 Difference]: Finished difference Result 283 states and 411 transitions. [2024-11-27 23:34:46,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 23:34:46,227 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2024-11-27 23:34:46,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:34:46,232 INFO L225 Difference]: With dead ends: 283 [2024-11-27 23:34:46,232 INFO L226 Difference]: Without dead ends: 236 [2024-11-27 23:34:46,233 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-27 23:34:46,234 INFO L435 NwaCegarLoop]: 145 mSDtfsCounter, 47 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-27 23:34:46,234 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 781 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-27 23:34:46,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2024-11-27 23:34:46,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2024-11-27 23:34:46,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 207 states have (on average 1.357487922705314) internal successors, (281), 209 states have internal predecessors, (281), 22 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (33), 29 states have call predecessors, (33), 21 states have call successors, (33) [2024-11-27 23:34:46,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 336 transitions. [2024-11-27 23:34:46,256 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 336 transitions. Word has length 43 [2024-11-27 23:34:46,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:34:46,257 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 336 transitions. [2024-11-27 23:34:46,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:34:46,257 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 336 transitions. [2024-11-27 23:34:46,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-27 23:34:46,259 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:34:46,259 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:34:46,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-27 23:34:46,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:34:46,464 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:34:46,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:34:46,464 INFO L85 PathProgramCache]: Analyzing trace with hash 243083261, now seen corresponding path program 1 times [2024-11-27 23:34:46,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:34:46,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1982347095] [2024-11-27 23:34:46,465 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:34:46,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:34:46,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:34:46,467 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:34:46,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 23:34:46,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:34:46,528 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 23:34:46,532 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:34:47,406 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 23:34:47,407 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:34:47,990 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 23:34:47,990 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:34:47,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982347095] [2024-11-27 23:34:47,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982347095] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:34:47,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:34:47,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2024-11-27 23:34:47,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357412882] [2024-11-27 23:34:47,991 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:34:47,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 23:34:47,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:34:47,992 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 23:34:47,993 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-27 23:34:47,993 INFO L87 Difference]: Start difference. First operand 235 states and 336 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 23:34:49,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:34:49,147 INFO L93 Difference]: Finished difference Result 408 states and 600 transitions. [2024-11-27 23:34:49,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 23:34:49,148 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2024-11-27 23:34:49,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:34:49,151 INFO L225 Difference]: With dead ends: 408 [2024-11-27 23:34:49,151 INFO L226 Difference]: Without dead ends: 326 [2024-11-27 23:34:49,151 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-27 23:34:49,152 INFO L435 NwaCegarLoop]: 126 mSDtfsCounter, 46 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-27 23:34:49,153 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 701 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-27 23:34:49,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2024-11-27 23:34:49,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 322. [2024-11-27 23:34:49,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 284 states have (on average 1.3591549295774648) internal successors, (386), 289 states have internal predecessors, (386), 32 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (43), 39 states have call predecessors, (43), 31 states have call successors, (43) [2024-11-27 23:34:49,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 461 transitions. [2024-11-27 23:34:49,183 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 461 transitions. Word has length 43 [2024-11-27 23:34:49,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:34:49,183 INFO L471 AbstractCegarLoop]: Abstraction has 322 states and 461 transitions. [2024-11-27 23:34:49,183 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 23:34:49,183 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 461 transitions. [2024-11-27 23:34:49,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-27 23:34:49,185 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:34:49,185 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:34:49,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-27 23:34:49,385 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:34:49,385 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:34:49,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:34:49,386 INFO L85 PathProgramCache]: Analyzing trace with hash 300341563, now seen corresponding path program 1 times [2024-11-27 23:34:49,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:34:49,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1730659224] [2024-11-27 23:34:49,386 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:34:49,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:34:49,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:34:49,389 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:34:49,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 23:34:49,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:34:49,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-27 23:34:49,456 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:34:51,431 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 23:34:51,431 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:34:51,431 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:34:51,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730659224] [2024-11-27 23:34:51,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730659224] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:34:51,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:34:51,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-27 23:34:51,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627991895] [2024-11-27 23:34:51,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:34:51,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-27 23:34:51,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:34:51,433 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-27 23:34:51,433 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-11-27 23:34:51,433 INFO L87 Difference]: Start difference. First operand 322 states and 461 transitions. Second operand has 12 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 23:34:56,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:34:56,998 INFO L93 Difference]: Finished difference Result 355 states and 504 transitions. [2024-11-27 23:34:56,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 23:34:56,999 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2024-11-27 23:34:57,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:34:57,002 INFO L225 Difference]: With dead ends: 355 [2024-11-27 23:34:57,002 INFO L226 Difference]: Without dead ends: 326 [2024-11-27 23:34:57,003 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-27 23:34:57,004 INFO L435 NwaCegarLoop]: 142 mSDtfsCounter, 75 mSDsluCounter, 1275 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 1417 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-11-27 23:34:57,004 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 1417 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2024-11-27 23:34:57,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2024-11-27 23:34:57,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 326. [2024-11-27 23:34:57,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 287 states have (on average 1.3519163763066202) internal successors, (388), 292 states have internal predecessors, (388), 32 states have call successors, (32), 3 states have call predecessors, (32), 6 states have return successors, (43), 39 states have call predecessors, (43), 31 states have call successors, (43) [2024-11-27 23:34:57,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 463 transitions. [2024-11-27 23:34:57,031 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 463 transitions. Word has length 43 [2024-11-27 23:34:57,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:34:57,032 INFO L471 AbstractCegarLoop]: Abstraction has 326 states and 463 transitions. [2024-11-27 23:34:57,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 23:34:57,032 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 463 transitions. [2024-11-27 23:34:57,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-27 23:34:57,034 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:34:57,034 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:34:57,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-27 23:34:57,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:34:57,235 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:34:57,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:34:57,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1898956665, now seen corresponding path program 1 times [2024-11-27 23:34:57,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:34:57,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544766840] [2024-11-27 23:34:57,236 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:34:57,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:34:57,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:34:57,238 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:34:57,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 23:34:57,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:34:57,304 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 23:34:57,305 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:34:58,256 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-27 23:34:58,256 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:34:59,035 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-27 23:34:59,035 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:34:59,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544766840] [2024-11-27 23:34:59,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544766840] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:34:59,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:34:59,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-11-27 23:34:59,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793093331] [2024-11-27 23:34:59,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:34:59,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 23:34:59,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:34:59,037 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 23:34:59,037 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-27 23:34:59,037 INFO L87 Difference]: Start difference. First operand 326 states and 463 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 23:35:00,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:35:00,540 INFO L93 Difference]: Finished difference Result 559 states and 820 transitions. [2024-11-27 23:35:00,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 23:35:00,541 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2024-11-27 23:35:00,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:35:00,544 INFO L225 Difference]: With dead ends: 559 [2024-11-27 23:35:00,544 INFO L226 Difference]: Without dead ends: 433 [2024-11-27 23:35:00,546 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-27 23:35:00,546 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 30 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-27 23:35:00,548 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 549 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-27 23:35:00,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2024-11-27 23:35:00,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 368. [2024-11-27 23:35:00,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 325 states have (on average 1.3476923076923077) internal successors, (438), 332 states have internal predecessors, (438), 36 states have call successors, (36), 3 states have call predecessors, (36), 6 states have return successors, (47), 43 states have call predecessors, (47), 35 states have call successors, (47) [2024-11-27 23:35:00,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 521 transitions. [2024-11-27 23:35:00,577 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 521 transitions. Word has length 43 [2024-11-27 23:35:00,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:35:00,577 INFO L471 AbstractCegarLoop]: Abstraction has 368 states and 521 transitions. [2024-11-27 23:35:00,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 23:35:00,578 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 521 transitions. [2024-11-27 23:35:00,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-27 23:35:00,579 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:35:00,579 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:35:00,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-27 23:35:00,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:00,780 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:35:00,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:35:00,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1218898295, now seen corresponding path program 1 times [2024-11-27 23:35:00,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:35:00,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [972923567] [2024-11-27 23:35:00,781 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:35:00,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:00,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:35:00,783 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:35:00,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-27 23:35:00,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:35:00,852 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-27 23:35:00,855 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:35:02,334 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-27 23:35:02,334 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:35:04,454 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:35:04,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972923567] [2024-11-27 23:35:04,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972923567] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:35:04,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [434272088] [2024-11-27 23:35:04,454 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:35:04,454 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-27 23:35:04,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-27 23:35:04,460 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-27 23:35:04,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2024-11-27 23:35:04,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:35:04,616 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-27 23:35:04,618 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:35:05,358 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-27 23:35:05,358 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:35:05,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [434272088] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:35:05,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:35:05,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2024-11-27 23:35:05,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108493357] [2024-11-27 23:35:05,735 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:35:05,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 23:35:05,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:35:05,736 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 23:35:05,736 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2024-11-27 23:35:05,736 INFO L87 Difference]: Start difference. First operand 368 states and 521 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 23:35:08,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:35:08,474 INFO L93 Difference]: Finished difference Result 378 states and 530 transitions. [2024-11-27 23:35:08,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 23:35:08,475 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2024-11-27 23:35:08,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:35:08,477 INFO L225 Difference]: With dead ends: 378 [2024-11-27 23:35:08,477 INFO L226 Difference]: Without dead ends: 376 [2024-11-27 23:35:08,478 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2024-11-27 23:35:08,478 INFO L435 NwaCegarLoop]: 130 mSDtfsCounter, 48 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:35:08,478 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 1094 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-27 23:35:08,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2024-11-27 23:35:08,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 372. [2024-11-27 23:35:08,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 328 states have (on average 1.3445121951219512) internal successors, (441), 335 states have internal predecessors, (441), 36 states have call successors, (36), 4 states have call predecessors, (36), 7 states have return successors, (47), 43 states have call predecessors, (47), 35 states have call successors, (47) [2024-11-27 23:35:08,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 524 transitions. [2024-11-27 23:35:08,501 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 524 transitions. Word has length 43 [2024-11-27 23:35:08,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:35:08,503 INFO L471 AbstractCegarLoop]: Abstraction has 372 states and 524 transitions. [2024-11-27 23:35:08,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 23:35:08,503 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 524 transitions. [2024-11-27 23:35:08,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-27 23:35:08,504 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:35:08,505 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:35:08,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-27 23:35:08,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2024-11-27 23:35:08,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-27 23:35:08,905 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:35:08,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:35:08,906 INFO L85 PathProgramCache]: Analyzing trace with hash 100867385, now seen corresponding path program 1 times [2024-11-27 23:35:08,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:35:08,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1300220117] [2024-11-27 23:35:08,906 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:35:08,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:08,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:35:08,910 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:35:08,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-27 23:35:08,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:35:08,970 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 23:35:08,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:35:10,573 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-27 23:35:10,573 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:35:10,573 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:35:10,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300220117] [2024-11-27 23:35:10,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300220117] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:35:10,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:35:10,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-27 23:35:10,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450338550] [2024-11-27 23:35:10,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:35:10,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-27 23:35:10,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:35:10,575 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-27 23:35:10,575 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-27 23:35:10,575 INFO L87 Difference]: Start difference. First operand 372 states and 524 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:35:13,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:35:13,982 INFO L93 Difference]: Finished difference Result 427 states and 599 transitions. [2024-11-27 23:35:13,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 23:35:13,983 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2024-11-27 23:35:13,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:35:13,986 INFO L225 Difference]: With dead ends: 427 [2024-11-27 23:35:13,986 INFO L226 Difference]: Without dead ends: 340 [2024-11-27 23:35:13,987 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-11-27 23:35:13,988 INFO L435 NwaCegarLoop]: 131 mSDtfsCounter, 60 mSDsluCounter, 1095 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1226 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-27 23:35:13,988 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 1226 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-27 23:35:13,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2024-11-27 23:35:14,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 332. [2024-11-27 23:35:14,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 291 states have (on average 1.3367697594501717) internal successors, (389), 296 states have internal predecessors, (389), 32 states have call successors, (32), 5 states have call predecessors, (32), 8 states have return successors, (43), 39 states have call predecessors, (43), 31 states have call successors, (43) [2024-11-27 23:35:14,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 464 transitions. [2024-11-27 23:35:14,012 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 464 transitions. Word has length 43 [2024-11-27 23:35:14,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:35:14,013 INFO L471 AbstractCegarLoop]: Abstraction has 332 states and 464 transitions. [2024-11-27 23:35:14,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:35:14,013 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 464 transitions. [2024-11-27 23:35:14,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-27 23:35:14,015 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:35:14,015 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:35:14,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-27 23:35:14,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:14,216 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:35:14,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:35:14,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1019424117, now seen corresponding path program 1 times [2024-11-27 23:35:14,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:35:14,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1675907995] [2024-11-27 23:35:14,216 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:35:14,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:14,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:35:14,218 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:35:14,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-27 23:35:14,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:35:14,276 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 23:35:14,278 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:35:14,904 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-27 23:35:14,904 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:35:14,904 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:35:14,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675907995] [2024-11-27 23:35:14,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675907995] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:35:14,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:35:14,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 23:35:14,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567405553] [2024-11-27 23:35:14,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:35:14,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 23:35:14,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:35:14,906 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 23:35:14,906 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 23:35:14,906 INFO L87 Difference]: Start difference. First operand 332 states and 464 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:35:15,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:35:15,940 INFO L93 Difference]: Finished difference Result 348 states and 481 transitions. [2024-11-27 23:35:15,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 23:35:15,941 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2024-11-27 23:35:15,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:35:15,943 INFO L225 Difference]: With dead ends: 348 [2024-11-27 23:35:15,943 INFO L226 Difference]: Without dead ends: 346 [2024-11-27 23:35:15,944 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-27 23:35:15,945 INFO L435 NwaCegarLoop]: 96 mSDtfsCounter, 3 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-27 23:35:15,945 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 460 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-27 23:35:15,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2024-11-27 23:35:15,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 338. [2024-11-27 23:35:15,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 295 states have (on average 1.335593220338983) internal successors, (394), 301 states have internal predecessors, (394), 33 states have call successors, (33), 6 states have call predecessors, (33), 9 states have return successors, (44), 39 states have call predecessors, (44), 32 states have call successors, (44) [2024-11-27 23:35:15,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 471 transitions. [2024-11-27 23:35:15,971 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 471 transitions. Word has length 43 [2024-11-27 23:35:15,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:35:15,971 INFO L471 AbstractCegarLoop]: Abstraction has 338 states and 471 transitions. [2024-11-27 23:35:15,971 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:35:15,971 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 471 transitions. [2024-11-27 23:35:15,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-27 23:35:15,972 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:35:15,973 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:35:15,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-27 23:35:16,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:16,174 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:35:16,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:35:16,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1076682419, now seen corresponding path program 1 times [2024-11-27 23:35:16,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:35:16,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [221129187] [2024-11-27 23:35:16,175 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:35:16,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:16,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:35:16,177 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:35:16,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-27 23:35:16,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:35:16,246 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 23:35:16,247 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:35:16,890 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-27 23:35:16,890 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:35:16,890 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:35:16,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221129187] [2024-11-27 23:35:16,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221129187] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:35:16,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:35:16,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 23:35:16,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409014935] [2024-11-27 23:35:16,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:35:16,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 23:35:16,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:35:16,892 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 23:35:16,892 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 23:35:16,892 INFO L87 Difference]: Start difference. First operand 338 states and 471 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:35:17,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:35:17,790 INFO L93 Difference]: Finished difference Result 344 states and 476 transitions. [2024-11-27 23:35:17,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 23:35:17,791 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2024-11-27 23:35:17,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:35:17,793 INFO L225 Difference]: With dead ends: 344 [2024-11-27 23:35:17,793 INFO L226 Difference]: Without dead ends: 342 [2024-11-27 23:35:17,793 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-27 23:35:17,794 INFO L435 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-27 23:35:17,794 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 455 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-27 23:35:17,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2024-11-27 23:35:17,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 336. [2024-11-27 23:35:17,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 294 states have (on average 1.3333333333333333) internal successors, (392), 299 states have internal predecessors, (392), 32 states have call successors, (32), 6 states have call predecessors, (32), 9 states have return successors, (43), 39 states have call predecessors, (43), 31 states have call successors, (43) [2024-11-27 23:35:17,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 467 transitions. [2024-11-27 23:35:17,836 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 467 transitions. Word has length 43 [2024-11-27 23:35:17,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:35:17,836 INFO L471 AbstractCegarLoop]: Abstraction has 336 states and 467 transitions. [2024-11-27 23:35:17,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:35:17,837 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 467 transitions. [2024-11-27 23:35:17,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-27 23:35:17,838 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:35:17,839 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:35:17,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-27 23:35:18,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:18,040 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:35:18,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:35:18,040 INFO L85 PathProgramCache]: Analyzing trace with hash -595914348, now seen corresponding path program 1 times [2024-11-27 23:35:18,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:35:18,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [673606412] [2024-11-27 23:35:18,041 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:35:18,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:18,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:35:18,043 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:35:18,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-27 23:35:18,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:35:18,109 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 23:35:18,110 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:35:18,477 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 23:35:18,477 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:35:18,477 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:35:18,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673606412] [2024-11-27 23:35:18,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673606412] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:35:18,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:35:18,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 23:35:18,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577984919] [2024-11-27 23:35:18,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:35:18,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:35:18,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:35:18,478 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:35:18,479 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:35:18,479 INFO L87 Difference]: Start difference. First operand 336 states and 467 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:35:18,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:35:18,650 INFO L93 Difference]: Finished difference Result 453 states and 642 transitions. [2024-11-27 23:35:18,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 23:35:18,651 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2024-11-27 23:35:18,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:35:18,653 INFO L225 Difference]: With dead ends: 453 [2024-11-27 23:35:18,653 INFO L226 Difference]: Without dead ends: 358 [2024-11-27 23:35:18,654 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:35:18,655 INFO L435 NwaCegarLoop]: 108 mSDtfsCounter, 14 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:35:18,655 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 307 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:35:18,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2024-11-27 23:35:18,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 358. [2024-11-27 23:35:18,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 318 states have (on average 1.2924528301886793) internal successors, (411), 320 states have internal predecessors, (411), 30 states have call successors, (30), 6 states have call predecessors, (30), 9 states have return successors, (41), 37 states have call predecessors, (41), 29 states have call successors, (41) [2024-11-27 23:35:18,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 482 transitions. [2024-11-27 23:35:18,682 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 482 transitions. Word has length 44 [2024-11-27 23:35:18,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:35:18,683 INFO L471 AbstractCegarLoop]: Abstraction has 358 states and 482 transitions. [2024-11-27 23:35:18,683 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:35:18,683 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 482 transitions. [2024-11-27 23:35:18,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-27 23:35:18,685 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:35:18,685 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:35:18,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-27 23:35:18,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:18,886 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:35:18,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:35:18,886 INFO L85 PathProgramCache]: Analyzing trace with hash 387869080, now seen corresponding path program 1 times [2024-11-27 23:35:18,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:35:18,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [16306253] [2024-11-27 23:35:18,887 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:35:18,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:18,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:35:18,890 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:35:18,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-27 23:35:18,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:35:18,962 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 23:35:18,964 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:35:19,118 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 23:35:19,118 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:35:19,119 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:35:19,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16306253] [2024-11-27 23:35:19,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16306253] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:35:19,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:35:19,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 23:35:19,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398839287] [2024-11-27 23:35:19,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:35:19,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:35:19,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:35:19,120 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:35:19,120 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:35:19,120 INFO L87 Difference]: Start difference. First operand 358 states and 482 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:35:19,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:35:19,257 INFO L93 Difference]: Finished difference Result 371 states and 497 transitions. [2024-11-27 23:35:19,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 23:35:19,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2024-11-27 23:35:19,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:35:19,261 INFO L225 Difference]: With dead ends: 371 [2024-11-27 23:35:19,261 INFO L226 Difference]: Without dead ends: 364 [2024-11-27 23:35:19,261 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:35:19,262 INFO L435 NwaCegarLoop]: 96 mSDtfsCounter, 0 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:35:19,263 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 282 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:35:19,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2024-11-27 23:35:19,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2024-11-27 23:35:19,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 324 states have (on average 1.287037037037037) internal successors, (417), 326 states have internal predecessors, (417), 30 states have call successors, (30), 6 states have call predecessors, (30), 9 states have return successors, (41), 37 states have call predecessors, (41), 29 states have call successors, (41) [2024-11-27 23:35:19,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 488 transitions. [2024-11-27 23:35:19,308 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 488 transitions. Word has length 45 [2024-11-27 23:35:19,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:35:19,308 INFO L471 AbstractCegarLoop]: Abstraction has 364 states and 488 transitions. [2024-11-27 23:35:19,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:35:19,309 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 488 transitions. [2024-11-27 23:35:19,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-27 23:35:19,310 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:35:19,310 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:35:19,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-27 23:35:19,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:19,515 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:35:19,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:35:19,515 INFO L85 PathProgramCache]: Analyzing trace with hash -2132090854, now seen corresponding path program 1 times [2024-11-27 23:35:19,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:35:19,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [159719653] [2024-11-27 23:35:19,516 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:35:19,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:19,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:35:19,518 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:35:19,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-27 23:35:19,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:35:19,576 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 23:35:19,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:35:19,842 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 23:35:19,842 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:35:19,843 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:35:19,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159719653] [2024-11-27 23:35:19,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159719653] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:35:19,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:35:19,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 23:35:19,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993977936] [2024-11-27 23:35:19,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:35:19,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:35:19,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:35:19,844 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:35:19,844 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:35:19,844 INFO L87 Difference]: Start difference. First operand 364 states and 488 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:35:20,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:35:20,140 INFO L93 Difference]: Finished difference Result 371 states and 494 transitions. [2024-11-27 23:35:20,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:35:20,141 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2024-11-27 23:35:20,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:35:20,143 INFO L225 Difference]: With dead ends: 371 [2024-11-27 23:35:20,143 INFO L226 Difference]: Without dead ends: 364 [2024-11-27 23:35:20,144 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 23:35:20,144 INFO L435 NwaCegarLoop]: 96 mSDtfsCounter, 3 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:35:20,145 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 375 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:35:20,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2024-11-27 23:35:20,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 358. [2024-11-27 23:35:20,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 318 states have (on average 1.279874213836478) internal successors, (407), 320 states have internal predecessors, (407), 30 states have call successors, (30), 6 states have call predecessors, (30), 9 states have return successors, (41), 37 states have call predecessors, (41), 29 states have call successors, (41) [2024-11-27 23:35:20,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 478 transitions. [2024-11-27 23:35:20,174 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 478 transitions. Word has length 45 [2024-11-27 23:35:20,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:35:20,175 INFO L471 AbstractCegarLoop]: Abstraction has 358 states and 478 transitions. [2024-11-27 23:35:20,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:35:20,175 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 478 transitions. [2024-11-27 23:35:20,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-27 23:35:20,177 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:35:20,177 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:35:20,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-27 23:35:20,377 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:20,378 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:35:20,378 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:35:20,378 INFO L85 PathProgramCache]: Analyzing trace with hash 2069480440, now seen corresponding path program 1 times [2024-11-27 23:35:20,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:35:20,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1410353089] [2024-11-27 23:35:20,378 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:35:20,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:20,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:35:20,381 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:35:20,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-27 23:35:20,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:35:20,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 23:35:20,450 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:35:20,734 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 23:35:20,734 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:35:20,734 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:35:20,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410353089] [2024-11-27 23:35:20,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410353089] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:35:20,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:35:20,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 23:35:20,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275148488] [2024-11-27 23:35:20,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:35:20,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:35:20,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:35:20,736 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:35:20,736 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:35:20,736 INFO L87 Difference]: Start difference. First operand 358 states and 478 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:35:20,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:35:20,896 INFO L93 Difference]: Finished difference Result 390 states and 519 transitions. [2024-11-27 23:35:20,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 23:35:20,896 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2024-11-27 23:35:20,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:35:20,899 INFO L225 Difference]: With dead ends: 390 [2024-11-27 23:35:20,899 INFO L226 Difference]: Without dead ends: 353 [2024-11-27 23:35:20,899 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:35:20,900 INFO L435 NwaCegarLoop]: 93 mSDtfsCounter, 15 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:35:20,900 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 274 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:35:20,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2024-11-27 23:35:20,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 342. [2024-11-27 23:35:20,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 306 states have (on average 1.2679738562091503) internal successors, (388), 306 states have internal predecessors, (388), 26 states have call successors, (26), 6 states have call predecessors, (26), 9 states have return successors, (37), 33 states have call predecessors, (37), 25 states have call successors, (37) [2024-11-27 23:35:20,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 451 transitions. [2024-11-27 23:35:20,925 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 451 transitions. Word has length 45 [2024-11-27 23:35:20,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:35:20,926 INFO L471 AbstractCegarLoop]: Abstraction has 342 states and 451 transitions. [2024-11-27 23:35:20,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:35:20,926 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 451 transitions. [2024-11-27 23:35:20,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-27 23:35:20,928 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:35:20,929 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:35:20,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-27 23:35:21,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:21,133 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:35:21,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:35:21,134 INFO L85 PathProgramCache]: Analyzing trace with hash 2048901964, now seen corresponding path program 1 times [2024-11-27 23:35:21,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:35:21,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1335690714] [2024-11-27 23:35:21,134 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:35:21,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:21,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:35:21,136 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:35:21,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-27 23:35:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:35:21,205 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 23:35:21,207 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:35:21,421 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-27 23:35:21,421 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:35:21,421 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:35:21,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335690714] [2024-11-27 23:35:21,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335690714] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:35:21,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:35:21,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 23:35:21,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052645672] [2024-11-27 23:35:21,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:35:21,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:35:21,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:35:21,422 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:35:21,423 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:35:21,423 INFO L87 Difference]: Start difference. First operand 342 states and 451 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:35:22,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:35:22,007 INFO L93 Difference]: Finished difference Result 400 states and 533 transitions. [2024-11-27 23:35:22,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 23:35:22,008 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2024-11-27 23:35:22,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:35:22,010 INFO L225 Difference]: With dead ends: 400 [2024-11-27 23:35:22,010 INFO L226 Difference]: Without dead ends: 345 [2024-11-27 23:35:22,010 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:35:22,011 INFO L435 NwaCegarLoop]: 106 mSDtfsCounter, 41 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-27 23:35:22,011 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 264 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-27 23:35:22,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2024-11-27 23:35:22,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 344. [2024-11-27 23:35:22,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 308 states have (on average 1.2597402597402598) internal successors, (388), 308 states have internal predecessors, (388), 26 states have call successors, (26), 6 states have call predecessors, (26), 9 states have return successors, (37), 33 states have call predecessors, (37), 25 states have call successors, (37) [2024-11-27 23:35:22,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 451 transitions. [2024-11-27 23:35:22,053 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 451 transitions. Word has length 48 [2024-11-27 23:35:22,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:35:22,053 INFO L471 AbstractCegarLoop]: Abstraction has 344 states and 451 transitions. [2024-11-27 23:35:22,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:35:22,053 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 451 transitions. [2024-11-27 23:35:22,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-27 23:35:22,055 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:35:22,055 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:35:22,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-27 23:35:22,255 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:22,257 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:35:22,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:35:22,258 INFO L85 PathProgramCache]: Analyzing trace with hash 142055626, now seen corresponding path program 1 times [2024-11-27 23:35:22,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:35:22,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2118617065] [2024-11-27 23:35:22,259 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:35:22,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:22,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:35:22,261 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:35:22,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-27 23:35:22,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:35:22,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-27 23:35:22,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:35:24,340 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-27 23:35:24,340 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:35:24,340 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:35:24,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118617065] [2024-11-27 23:35:24,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118617065] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:35:24,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:35:24,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-27 23:35:24,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296552618] [2024-11-27 23:35:24,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:35:24,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-27 23:35:24,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:35:24,342 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-27 23:35:24,342 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-27 23:35:24,343 INFO L87 Difference]: Start difference. First operand 344 states and 451 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:35:29,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:35:29,391 INFO L93 Difference]: Finished difference Result 387 states and 510 transitions. [2024-11-27 23:35:29,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 23:35:29,391 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2024-11-27 23:35:29,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:35:29,394 INFO L225 Difference]: With dead ends: 387 [2024-11-27 23:35:29,394 INFO L226 Difference]: Without dead ends: 364 [2024-11-27 23:35:29,395 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2024-11-27 23:35:29,396 INFO L435 NwaCegarLoop]: 109 mSDtfsCounter, 69 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2024-11-27 23:35:29,397 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 940 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2024-11-27 23:35:29,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2024-11-27 23:35:29,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 359. [2024-11-27 23:35:29,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 321 states have (on average 1.2585669781931463) internal successors, (404), 322 states have internal predecessors, (404), 28 states have call successors, (28), 6 states have call predecessors, (28), 9 states have return successors, (39), 35 states have call predecessors, (39), 27 states have call successors, (39) [2024-11-27 23:35:29,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 471 transitions. [2024-11-27 23:35:29,429 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 471 transitions. Word has length 48 [2024-11-27 23:35:29,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:35:29,429 INFO L471 AbstractCegarLoop]: Abstraction has 359 states and 471 transitions. [2024-11-27 23:35:29,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:35:29,429 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 471 transitions. [2024-11-27 23:35:29,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-27 23:35:29,431 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:35:29,431 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:35:29,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-27 23:35:29,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:29,636 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:35:29,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:35:29,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1113305586, now seen corresponding path program 1 times [2024-11-27 23:35:29,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:35:29,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1638418841] [2024-11-27 23:35:29,637 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:35:29,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:29,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:35:29,640 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:35:29,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-27 23:35:29,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:35:29,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 23:35:29,725 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:35:30,230 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-27 23:35:30,230 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:35:30,231 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:35:30,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638418841] [2024-11-27 23:35:30,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638418841] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:35:30,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:35:30,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 23:35:30,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300597527] [2024-11-27 23:35:30,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:35:30,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:35:30,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:35:30,233 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:35:30,234 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:35:30,234 INFO L87 Difference]: Start difference. First operand 359 states and 471 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:35:31,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:35:31,361 INFO L93 Difference]: Finished difference Result 430 states and 571 transitions. [2024-11-27 23:35:31,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 23:35:31,362 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2024-11-27 23:35:31,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:35:31,364 INFO L225 Difference]: With dead ends: 430 [2024-11-27 23:35:31,365 INFO L226 Difference]: Without dead ends: 381 [2024-11-27 23:35:31,365 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-27 23:35:31,367 INFO L435 NwaCegarLoop]: 123 mSDtfsCounter, 52 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-27 23:35:31,368 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 413 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-27 23:35:31,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2024-11-27 23:35:31,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 343. [2024-11-27 23:35:31,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 307 states have (on average 1.254071661237785) internal successors, (385), 307 states have internal predecessors, (385), 26 states have call successors, (26), 6 states have call predecessors, (26), 9 states have return successors, (37), 33 states have call predecessors, (37), 25 states have call successors, (37) [2024-11-27 23:35:31,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 448 transitions. [2024-11-27 23:35:31,399 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 448 transitions. Word has length 48 [2024-11-27 23:35:31,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:35:31,399 INFO L471 AbstractCegarLoop]: Abstraction has 343 states and 448 transitions. [2024-11-27 23:35:31,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:35:31,399 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 448 transitions. [2024-11-27 23:35:31,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-27 23:35:31,401 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:35:31,401 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:35:31,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-27 23:35:31,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:31,605 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:35:31,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:35:31,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1453533571, now seen corresponding path program 1 times [2024-11-27 23:35:31,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:35:31,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [48401878] [2024-11-27 23:35:31,606 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:35:31,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:31,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:35:31,608 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:35:31,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-27 23:35:31,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:35:31,672 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 23:35:31,673 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:35:33,340 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-27 23:35:33,341 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:35:34,420 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 23:35:34,420 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:35:34,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48401878] [2024-11-27 23:35:34,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48401878] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 23:35:34,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:35:34,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2024-11-27 23:35:34,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040446230] [2024-11-27 23:35:34,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:35:34,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 23:35:34,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:35:34,421 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 23:35:34,421 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-11-27 23:35:34,422 INFO L87 Difference]: Start difference. First operand 343 states and 448 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:35:35,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:35:35,964 INFO L93 Difference]: Finished difference Result 489 states and 660 transitions. [2024-11-27 23:35:35,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 23:35:35,965 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2024-11-27 23:35:35,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:35:35,968 INFO L225 Difference]: With dead ends: 489 [2024-11-27 23:35:35,968 INFO L226 Difference]: Without dead ends: 449 [2024-11-27 23:35:35,968 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-11-27 23:35:35,969 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 25 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-27 23:35:35,970 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 352 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-27 23:35:35,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2024-11-27 23:35:35,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 358. [2024-11-27 23:35:35,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 318 states have (on average 1.2452830188679245) internal successors, (396), 318 states have internal predecessors, (396), 30 states have call successors, (30), 6 states have call predecessors, (30), 9 states have return successors, (41), 37 states have call predecessors, (41), 29 states have call successors, (41) [2024-11-27 23:35:36,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 467 transitions. [2024-11-27 23:35:36,004 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 467 transitions. Word has length 49 [2024-11-27 23:35:36,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:35:36,004 INFO L471 AbstractCegarLoop]: Abstraction has 358 states and 467 transitions. [2024-11-27 23:35:36,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:35:36,005 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 467 transitions. [2024-11-27 23:35:36,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-27 23:35:36,006 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:35:36,006 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:35:36,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-27 23:35:36,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:36,208 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:35:36,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:35:36,208 INFO L85 PathProgramCache]: Analyzing trace with hash -2140369147, now seen corresponding path program 1 times [2024-11-27 23:35:36,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:35:36,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [207083821] [2024-11-27 23:35:36,209 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:35:36,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:36,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:35:36,212 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:35:36,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-27 23:35:36,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:35:36,289 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 23:35:36,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:35:36,505 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 23:35:36,505 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:35:36,505 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:35:36,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207083821] [2024-11-27 23:35:36,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207083821] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:35:36,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:35:36,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 23:35:36,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395954862] [2024-11-27 23:35:36,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:35:36,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:35:36,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:35:36,507 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:35:36,507 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:35:36,507 INFO L87 Difference]: Start difference. First operand 358 states and 467 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:35:36,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:35:36,644 INFO L93 Difference]: Finished difference Result 377 states and 488 transitions. [2024-11-27 23:35:36,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 23:35:36,645 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2024-11-27 23:35:36,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:35:36,646 INFO L225 Difference]: With dead ends: 377 [2024-11-27 23:35:36,647 INFO L226 Difference]: Without dead ends: 339 [2024-11-27 23:35:36,647 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:35:36,647 INFO L435 NwaCegarLoop]: 95 mSDtfsCounter, 0 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:35:36,648 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 279 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:35:36,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2024-11-27 23:35:36,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 338. [2024-11-27 23:35:36,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 298 states have (on average 1.2416107382550337) internal successors, (370), 299 states have internal predecessors, (370), 30 states have call successors, (30), 6 states have call predecessors, (30), 9 states have return successors, (39), 36 states have call predecessors, (39), 29 states have call successors, (39) [2024-11-27 23:35:36,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 439 transitions. [2024-11-27 23:35:36,674 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 439 transitions. Word has length 49 [2024-11-27 23:35:36,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:35:36,674 INFO L471 AbstractCegarLoop]: Abstraction has 338 states and 439 transitions. [2024-11-27 23:35:36,675 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:35:36,675 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 439 transitions. [2024-11-27 23:35:36,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-27 23:35:36,676 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:35:36,678 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:35:36,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-27 23:35:36,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:36,878 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:35:36,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:35:36,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1929516195, now seen corresponding path program 1 times [2024-11-27 23:35:36,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:35:36,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125246557] [2024-11-27 23:35:36,879 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:35:36,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:36,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:35:36,882 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:35:36,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-27 23:35:36,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:35:36,965 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-27 23:35:36,967 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:35:39,032 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-27 23:35:39,032 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:35:39,032 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:35:39,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125246557] [2024-11-27 23:35:39,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125246557] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:35:39,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:35:39,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-27 23:35:39,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131329200] [2024-11-27 23:35:39,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:35:39,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-27 23:35:39,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:35:39,034 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-27 23:35:39,034 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-11-27 23:35:39,034 INFO L87 Difference]: Start difference. First operand 338 states and 439 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:35:42,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:35:42,276 INFO L93 Difference]: Finished difference Result 404 states and 529 transitions. [2024-11-27 23:35:42,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-27 23:35:42,277 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2024-11-27 23:35:42,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:35:42,279 INFO L225 Difference]: With dead ends: 404 [2024-11-27 23:35:42,279 INFO L226 Difference]: Without dead ends: 371 [2024-11-27 23:35:42,280 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-11-27 23:35:42,280 INFO L435 NwaCegarLoop]: 88 mSDtfsCounter, 74 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-27 23:35:42,280 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 548 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-11-27 23:35:42,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2024-11-27 23:35:42,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 360. [2024-11-27 23:35:42,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 316 states have (on average 1.2373417721518987) internal successors, (391), 319 states have internal predecessors, (391), 34 states have call successors, (34), 6 states have call predecessors, (34), 9 states have return successors, (42), 39 states have call predecessors, (42), 32 states have call successors, (42) [2024-11-27 23:35:42,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 467 transitions. [2024-11-27 23:35:42,310 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 467 transitions. Word has length 50 [2024-11-27 23:35:42,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:35:42,310 INFO L471 AbstractCegarLoop]: Abstraction has 360 states and 467 transitions. [2024-11-27 23:35:42,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:35:42,311 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 467 transitions. [2024-11-27 23:35:42,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-27 23:35:42,312 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:35:42,312 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:35:42,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-27 23:35:42,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:42,513 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:35:42,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:35:42,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1787300319, now seen corresponding path program 1 times [2024-11-27 23:35:42,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:35:42,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [972769524] [2024-11-27 23:35:42,513 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:35:42,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:42,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:35:42,515 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:35:42,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-27 23:35:42,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:35:42,595 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 23:35:42,596 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:35:43,237 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 23:35:43,237 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:35:43,237 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:35:43,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972769524] [2024-11-27 23:35:43,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972769524] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:35:43,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:35:43,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-27 23:35:43,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107568052] [2024-11-27 23:35:43,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:35:43,238 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 23:35:43,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:35:43,239 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 23:35:43,239 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-27 23:35:43,240 INFO L87 Difference]: Start difference. First operand 360 states and 467 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:35:45,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:35:45,441 INFO L93 Difference]: Finished difference Result 475 states and 624 transitions. [2024-11-27 23:35:45,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 23:35:45,442 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2024-11-27 23:35:45,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:35:45,444 INFO L225 Difference]: With dead ends: 475 [2024-11-27 23:35:45,445 INFO L226 Difference]: Without dead ends: 451 [2024-11-27 23:35:45,445 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-27 23:35:45,446 INFO L435 NwaCegarLoop]: 88 mSDtfsCounter, 27 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:35:45,446 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 443 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-27 23:35:45,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2024-11-27 23:35:45,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 373. [2024-11-27 23:35:45,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 325 states have (on average 1.2523076923076923) internal successors, (407), 330 states have internal predecessors, (407), 38 states have call successors, (38), 6 states have call predecessors, (38), 9 states have return successors, (46), 42 states have call predecessors, (46), 36 states have call successors, (46) [2024-11-27 23:35:45,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 491 transitions. [2024-11-27 23:35:45,493 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 491 transitions. Word has length 50 [2024-11-27 23:35:45,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:35:45,494 INFO L471 AbstractCegarLoop]: Abstraction has 373 states and 491 transitions. [2024-11-27 23:35:45,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:35:45,494 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 491 transitions. [2024-11-27 23:35:45,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-27 23:35:45,496 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:35:45,496 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:35:45,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-27 23:35:45,696 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:45,697 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:35:45,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:35:45,698 INFO L85 PathProgramCache]: Analyzing trace with hash -865053569, now seen corresponding path program 1 times [2024-11-27 23:35:45,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:35:45,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [27248201] [2024-11-27 23:35:45,698 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:35:45,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:45,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:35:45,701 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:35:45,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-27 23:35:45,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:35:45,784 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 23:35:45,786 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:35:46,167 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 23:35:46,167 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:35:46,167 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:35:46,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27248201] [2024-11-27 23:35:46,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27248201] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:35:46,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:35:46,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 23:35:46,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866210615] [2024-11-27 23:35:46,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:35:46,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:35:46,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:35:46,169 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:35:46,169 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:35:46,169 INFO L87 Difference]: Start difference. First operand 373 states and 491 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:35:46,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:35:46,361 INFO L93 Difference]: Finished difference Result 420 states and 550 transitions. [2024-11-27 23:35:46,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 23:35:46,362 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2024-11-27 23:35:46,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:35:46,364 INFO L225 Difference]: With dead ends: 420 [2024-11-27 23:35:46,364 INFO L226 Difference]: Without dead ends: 373 [2024-11-27 23:35:46,365 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:35:46,365 INFO L435 NwaCegarLoop]: 103 mSDtfsCounter, 26 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:35:46,365 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 277 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:35:46,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2024-11-27 23:35:46,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 373. [2024-11-27 23:35:46,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 325 states have (on average 1.2061538461538461) internal successors, (392), 330 states have internal predecessors, (392), 38 states have call successors, (38), 6 states have call predecessors, (38), 9 states have return successors, (46), 42 states have call predecessors, (46), 36 states have call successors, (46) [2024-11-27 23:35:46,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 476 transitions. [2024-11-27 23:35:46,406 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 476 transitions. Word has length 50 [2024-11-27 23:35:46,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:35:46,407 INFO L471 AbstractCegarLoop]: Abstraction has 373 states and 476 transitions. [2024-11-27 23:35:46,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:35:46,407 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 476 transitions. [2024-11-27 23:35:46,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-27 23:35:46,409 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:35:46,409 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:35:46,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-27 23:35:46,609 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:46,610 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:35:46,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:35:46,610 INFO L85 PathProgramCache]: Analyzing trace with hash 722385153, now seen corresponding path program 1 times [2024-11-27 23:35:46,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:35:46,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2036596563] [2024-11-27 23:35:46,611 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:35:46,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:46,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:35:46,613 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:35:46,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-27 23:35:46,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:35:46,686 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 23:35:46,688 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:35:47,642 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-27 23:35:47,642 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:35:48,560 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-27 23:35:48,560 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:35:48,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036596563] [2024-11-27 23:35:48,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036596563] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:35:48,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:35:48,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2024-11-27 23:35:48,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009001289] [2024-11-27 23:35:48,561 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:35:48,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 23:35:48,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:35:48,562 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 23:35:48,562 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-27 23:35:48,562 INFO L87 Difference]: Start difference. First operand 373 states and 476 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 23:35:49,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:35:49,482 INFO L93 Difference]: Finished difference Result 401 states and 509 transitions. [2024-11-27 23:35:49,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 23:35:49,483 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2024-11-27 23:35:49,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:35:49,484 INFO L225 Difference]: With dead ends: 401 [2024-11-27 23:35:49,484 INFO L226 Difference]: Without dead ends: 365 [2024-11-27 23:35:49,484 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-27 23:35:49,485 INFO L435 NwaCegarLoop]: 101 mSDtfsCounter, 20 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-27 23:35:49,485 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 569 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-27 23:35:49,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2024-11-27 23:35:49,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 353. [2024-11-27 23:35:49,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 305 states have (on average 1.2098360655737705) internal successors, (369), 311 states have internal predecessors, (369), 38 states have call successors, (38), 6 states have call predecessors, (38), 9 states have return successors, (46), 41 states have call predecessors, (46), 36 states have call successors, (46) [2024-11-27 23:35:49,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 453 transitions. [2024-11-27 23:35:49,517 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 453 transitions. Word has length 50 [2024-11-27 23:35:49,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:35:49,518 INFO L471 AbstractCegarLoop]: Abstraction has 353 states and 453 transitions. [2024-11-27 23:35:49,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 23:35:49,518 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 453 transitions. [2024-11-27 23:35:49,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-27 23:35:49,520 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:35:49,520 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:35:49,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-27 23:35:49,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:49,721 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:35:49,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:35:49,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1721726817, now seen corresponding path program 1 times [2024-11-27 23:35:49,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:35:49,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2122800166] [2024-11-27 23:35:49,721 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:35:49,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:49,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:35:49,723 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:35:49,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-27 23:35:49,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:35:49,778 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 23:35:49,779 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:35:49,911 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 23:35:49,911 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:35:49,911 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:35:49,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122800166] [2024-11-27 23:35:49,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122800166] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:35:49,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:35:49,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 23:35:49,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290958575] [2024-11-27 23:35:49,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:35:49,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:35:49,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:35:49,912 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:35:49,912 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:35:49,912 INFO L87 Difference]: Start difference. First operand 353 states and 453 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:35:50,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:35:50,004 INFO L93 Difference]: Finished difference Result 362 states and 461 transitions. [2024-11-27 23:35:50,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 23:35:50,005 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2024-11-27 23:35:50,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:35:50,007 INFO L225 Difference]: With dead ends: 362 [2024-11-27 23:35:50,007 INFO L226 Difference]: Without dead ends: 323 [2024-11-27 23:35:50,008 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:35:50,009 INFO L435 NwaCegarLoop]: 94 mSDtfsCounter, 0 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:35:50,009 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 276 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:35:50,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2024-11-27 23:35:50,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 292. [2024-11-27 23:35:50,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 253 states have (on average 1.209486166007905) internal successors, (306), 258 states have internal predecessors, (306), 29 states have call successors, (29), 6 states have call predecessors, (29), 9 states have return successors, (34), 31 states have call predecessors, (34), 27 states have call successors, (34) [2024-11-27 23:35:50,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 369 transitions. [2024-11-27 23:35:50,034 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 369 transitions. Word has length 52 [2024-11-27 23:35:50,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:35:50,034 INFO L471 AbstractCegarLoop]: Abstraction has 292 states and 369 transitions. [2024-11-27 23:35:50,034 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:35:50,034 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 369 transitions. [2024-11-27 23:35:50,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-27 23:35:50,035 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:35:50,035 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:35:50,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-27 23:35:50,236 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:50,236 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:35:50,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:35:50,236 INFO L85 PathProgramCache]: Analyzing trace with hash -66283809, now seen corresponding path program 1 times [2024-11-27 23:35:50,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:35:50,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1169198566] [2024-11-27 23:35:50,237 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:35:50,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:50,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:35:50,238 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:35:50,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-27 23:35:50,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:35:50,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 23:35:50,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:35:51,881 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-27 23:35:51,881 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:35:52,870 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 23:35:52,870 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:35:52,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169198566] [2024-11-27 23:35:52,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169198566] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 23:35:52,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:35:52,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2024-11-27 23:35:52,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931483431] [2024-11-27 23:35:52,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:35:52,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 23:35:52,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:35:52,872 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 23:35:52,872 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-11-27 23:35:52,872 INFO L87 Difference]: Start difference. First operand 292 states and 369 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:35:54,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:35:54,757 INFO L93 Difference]: Finished difference Result 363 states and 458 transitions. [2024-11-27 23:35:54,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 23:35:54,758 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2024-11-27 23:35:54,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:35:54,760 INFO L225 Difference]: With dead ends: 363 [2024-11-27 23:35:54,760 INFO L226 Difference]: Without dead ends: 308 [2024-11-27 23:35:54,761 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2024-11-27 23:35:54,762 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 24 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-27 23:35:54,762 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 338 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-27 23:35:54,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2024-11-27 23:35:54,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 284. [2024-11-27 23:35:54,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 244 states have (on average 1.2172131147540983) internal successors, (297), 248 states have internal predecessors, (297), 31 states have call successors, (31), 6 states have call predecessors, (31), 8 states have return successors, (32), 32 states have call predecessors, (32), 29 states have call successors, (32) [2024-11-27 23:35:54,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 360 transitions. [2024-11-27 23:35:54,792 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 360 transitions. Word has length 52 [2024-11-27 23:35:54,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:35:54,792 INFO L471 AbstractCegarLoop]: Abstraction has 284 states and 360 transitions. [2024-11-27 23:35:54,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:35:54,793 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 360 transitions. [2024-11-27 23:35:54,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-27 23:35:54,794 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:35:54,794 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:35:54,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-27 23:35:54,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:54,995 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:35:54,995 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:35:54,995 INFO L85 PathProgramCache]: Analyzing trace with hash 2031048038, now seen corresponding path program 1 times [2024-11-27 23:35:54,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:35:54,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [843345503] [2024-11-27 23:35:54,996 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:35:54,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:54,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:35:55,001 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:35:55,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-27 23:35:55,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:35:55,075 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-27 23:35:55,077 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:35:57,582 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 23:35:57,583 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:35:57,583 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:35:57,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843345503] [2024-11-27 23:35:57,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843345503] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:35:57,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:35:57,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-11-27 23:35:57,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260862241] [2024-11-27 23:35:57,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:35:57,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-27 23:35:57,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:35:57,584 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-27 23:35:57,584 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-11-27 23:35:57,584 INFO L87 Difference]: Start difference. First operand 284 states and 360 transitions. Second operand has 13 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-27 23:36:01,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:36:01,935 INFO L93 Difference]: Finished difference Result 364 states and 461 transitions. [2024-11-27 23:36:01,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-27 23:36:01,935 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 53 [2024-11-27 23:36:01,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:36:01,937 INFO L225 Difference]: With dead ends: 364 [2024-11-27 23:36:01,937 INFO L226 Difference]: Without dead ends: 325 [2024-11-27 23:36:01,937 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2024-11-27 23:36:01,938 INFO L435 NwaCegarLoop]: 127 mSDtfsCounter, 84 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-11-27 23:36:01,938 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 1061 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-11-27 23:36:01,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2024-11-27 23:36:01,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 284. [2024-11-27 23:36:01,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 244 states have (on average 1.209016393442623) internal successors, (295), 248 states have internal predecessors, (295), 31 states have call successors, (31), 6 states have call predecessors, (31), 8 states have return successors, (32), 32 states have call predecessors, (32), 29 states have call successors, (32) [2024-11-27 23:36:01,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 358 transitions. [2024-11-27 23:36:01,959 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 358 transitions. Word has length 53 [2024-11-27 23:36:01,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:36:01,960 INFO L471 AbstractCegarLoop]: Abstraction has 284 states and 358 transitions. [2024-11-27 23:36:01,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-27 23:36:01,960 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 358 transitions. [2024-11-27 23:36:01,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-27 23:36:01,961 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:36:01,961 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:36:01,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-27 23:36:02,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:36:02,162 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:36:02,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:36:02,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1888832162, now seen corresponding path program 1 times [2024-11-27 23:36:02,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:36:02,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [194967665] [2024-11-27 23:36:02,163 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:36:02,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:36:02,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:36:02,165 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:36:02,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-27 23:36:02,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:36:02,240 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-27 23:36:02,242 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:36:04,355 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-27 23:36:04,355 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:36:06,596 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:36:06,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194967665] [2024-11-27 23:36:06,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194967665] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:36:06,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1871750259] [2024-11-27 23:36:06,597 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:36:06,597 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-27 23:36:06,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-27 23:36:06,600 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-27 23:36:06,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2024-11-27 23:36:06,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:36:06,749 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 23:36:06,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:36:07,743 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-27 23:36:07,743 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:36:09,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1871750259] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:36:09,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:36:09,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2024-11-27 23:36:09,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861540880] [2024-11-27 23:36:09,444 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:36:09,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-27 23:36:09,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:36:09,445 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-27 23:36:09,445 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2024-11-27 23:36:09,445 INFO L87 Difference]: Start difference. First operand 284 states and 358 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 23:36:13,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:36:13,670 INFO L93 Difference]: Finished difference Result 359 states and 456 transitions. [2024-11-27 23:36:13,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 23:36:13,671 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 53 [2024-11-27 23:36:13,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:36:13,672 INFO L225 Difference]: With dead ends: 359 [2024-11-27 23:36:13,672 INFO L226 Difference]: Without dead ends: 325 [2024-11-27 23:36:13,673 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2024-11-27 23:36:13,673 INFO L435 NwaCegarLoop]: 111 mSDtfsCounter, 44 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-11-27 23:36:13,674 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 1012 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-11-27 23:36:13,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2024-11-27 23:36:13,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 284. [2024-11-27 23:36:13,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 244 states have (on average 1.2049180327868851) internal successors, (294), 248 states have internal predecessors, (294), 31 states have call successors, (31), 6 states have call predecessors, (31), 8 states have return successors, (32), 32 states have call predecessors, (32), 29 states have call successors, (32) [2024-11-27 23:36:13,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 357 transitions. [2024-11-27 23:36:13,705 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 357 transitions. Word has length 53 [2024-11-27 23:36:13,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:36:13,706 INFO L471 AbstractCegarLoop]: Abstraction has 284 states and 357 transitions. [2024-11-27 23:36:13,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 23:36:13,706 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 357 transitions. [2024-11-27 23:36:13,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-27 23:36:13,708 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:36:13,708 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:36:13,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-27 23:36:13,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2024-11-27 23:36:14,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-27 23:36:14,109 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:36:14,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:36:14,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1881328668, now seen corresponding path program 1 times [2024-11-27 23:36:14,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:36:14,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [47720966] [2024-11-27 23:36:14,109 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:36:14,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:36:14,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:36:14,114 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:36:14,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-27 23:36:14,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:36:14,179 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-27 23:36:14,181 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:36:16,585 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-27 23:36:16,586 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:36:16,586 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:36:16,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47720966] [2024-11-27 23:36:16,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47720966] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:36:16,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:36:16,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-11-27 23:36:16,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498927373] [2024-11-27 23:36:16,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:36:16,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-27 23:36:16,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:36:16,587 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-27 23:36:16,587 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2024-11-27 23:36:16,587 INFO L87 Difference]: Start difference. First operand 284 states and 357 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 23:36:21,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:36:21,343 INFO L93 Difference]: Finished difference Result 349 states and 437 transitions. [2024-11-27 23:36:21,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-27 23:36:21,344 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2024-11-27 23:36:21,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:36:21,346 INFO L225 Difference]: With dead ends: 349 [2024-11-27 23:36:21,346 INFO L226 Difference]: Without dead ends: 301 [2024-11-27 23:36:21,347 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-11-27 23:36:21,347 INFO L435 NwaCegarLoop]: 77 mSDtfsCounter, 52 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2024-11-27 23:36:21,347 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 813 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2024-11-27 23:36:21,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2024-11-27 23:36:21,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 284. [2024-11-27 23:36:21,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 244 states have (on average 1.1967213114754098) internal successors, (292), 248 states have internal predecessors, (292), 31 states have call successors, (31), 6 states have call predecessors, (31), 8 states have return successors, (32), 32 states have call predecessors, (32), 29 states have call successors, (32) [2024-11-27 23:36:21,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 355 transitions. [2024-11-27 23:36:21,382 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 355 transitions. Word has length 53 [2024-11-27 23:36:21,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:36:21,382 INFO L471 AbstractCegarLoop]: Abstraction has 284 states and 355 transitions. [2024-11-27 23:36:21,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 23:36:21,383 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 355 transitions. [2024-11-27 23:36:21,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-27 23:36:21,383 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:36:21,384 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:36:21,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-27 23:36:21,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:36:21,584 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:36:21,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:36:21,585 INFO L85 PathProgramCache]: Analyzing trace with hash -2023544544, now seen corresponding path program 1 times [2024-11-27 23:36:21,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:36:21,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1014759529] [2024-11-27 23:36:21,585 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:36:21,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:36:21,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:36:21,587 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:36:21,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-27 23:36:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:36:21,662 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-27 23:36:21,663 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:36:27,946 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-27 23:36:27,946 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:36:29,588 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:36:29,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014759529] [2024-11-27 23:36:29,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014759529] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:36:29,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [905495830] [2024-11-27 23:36:29,588 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:36:29,588 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-27 23:36:29,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-27 23:36:29,591 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-27 23:36:29,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2024-11-27 23:36:29,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:36:29,716 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 23:36:29,717 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:36:30,264 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-27 23:36:30,264 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:36:30,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [905495830] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:36:30,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:36:30,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 10 [2024-11-27 23:36:30,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46691700] [2024-11-27 23:36:30,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:36:30,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 23:36:30,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:36:30,266 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 23:36:30,266 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=160, Unknown=1, NotChecked=0, Total=210 [2024-11-27 23:36:30,266 INFO L87 Difference]: Start difference. First operand 284 states and 355 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 23:36:34,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:36:35,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:36:35,942 INFO L93 Difference]: Finished difference Result 302 states and 374 transitions. [2024-11-27 23:36:35,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 23:36:35,943 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2024-11-27 23:36:35,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:36:35,945 INFO L225 Difference]: With dead ends: 302 [2024-11-27 23:36:35,945 INFO L226 Difference]: Without dead ends: 300 [2024-11-27 23:36:35,946 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=56, Invalid=183, Unknown=1, NotChecked=0, Total=240 [2024-11-27 23:36:35,946 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 10 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2024-11-27 23:36:35,946 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 334 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2024-11-27 23:36:35,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2024-11-27 23:36:35,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 290. [2024-11-27 23:36:35,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 247 states have (on average 1.194331983805668) internal successors, (295), 253 states have internal predecessors, (295), 33 states have call successors, (33), 7 states have call predecessors, (33), 9 states have return successors, (34), 32 states have call predecessors, (34), 31 states have call successors, (34) [2024-11-27 23:36:35,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 362 transitions. [2024-11-27 23:36:35,974 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 362 transitions. Word has length 53 [2024-11-27 23:36:35,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:36:35,974 INFO L471 AbstractCegarLoop]: Abstraction has 290 states and 362 transitions. [2024-11-27 23:36:35,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 23:36:35,974 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 362 transitions. [2024-11-27 23:36:35,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-27 23:36:35,976 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:36:35,976 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:36:35,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2024-11-27 23:36:36,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-11-27 23:36:36,377 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:36:36,377 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:36:36,378 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:36:36,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1777301099, now seen corresponding path program 1 times [2024-11-27 23:36:36,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:36:36,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1084053004] [2024-11-27 23:36:36,379 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:36:36,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:36:36,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:36:36,381 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:36:36,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-27 23:36:36,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:36:36,452 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 23:36:36,453 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:36:37,479 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 23:36:37,480 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:36:38,891 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 23:36:38,891 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:36:38,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084053004] [2024-11-27 23:36:38,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084053004] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:36:38,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:36:38,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2024-11-27 23:36:38,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857643512] [2024-11-27 23:36:38,892 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:36:38,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-27 23:36:38,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:36:38,893 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-27 23:36:38,893 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-11-27 23:36:38,893 INFO L87 Difference]: Start difference. First operand 290 states and 362 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 11 states have internal predecessors, (52), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-27 23:36:41,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:36:41,028 INFO L93 Difference]: Finished difference Result 353 states and 441 transitions. [2024-11-27 23:36:41,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 23:36:41,029 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 11 states have internal predecessors, (52), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 54 [2024-11-27 23:36:41,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:36:41,030 INFO L225 Difference]: With dead ends: 353 [2024-11-27 23:36:41,030 INFO L226 Difference]: Without dead ends: 299 [2024-11-27 23:36:41,031 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-27 23:36:41,031 INFO L435 NwaCegarLoop]: 98 mSDtfsCounter, 34 mSDsluCounter, 1014 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-27 23:36:41,031 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 1112 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-27 23:36:41,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2024-11-27 23:36:41,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 275. [2024-11-27 23:36:41,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 234 states have (on average 1.1794871794871795) internal successors, (276), 238 states have internal predecessors, (276), 31 states have call successors, (31), 7 states have call predecessors, (31), 9 states have return successors, (32), 30 states have call predecessors, (32), 29 states have call successors, (32) [2024-11-27 23:36:41,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 339 transitions. [2024-11-27 23:36:41,061 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 339 transitions. Word has length 54 [2024-11-27 23:36:41,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:36:41,062 INFO L471 AbstractCegarLoop]: Abstraction has 275 states and 339 transitions. [2024-11-27 23:36:41,062 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 11 states have internal predecessors, (52), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-27 23:36:41,062 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 339 transitions. [2024-11-27 23:36:41,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-27 23:36:41,063 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:36:41,063 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:36:41,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-27 23:36:41,264 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:36:41,264 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:36:41,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:36:41,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1493072599, now seen corresponding path program 1 times [2024-11-27 23:36:41,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:36:41,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1968269494] [2024-11-27 23:36:41,265 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:36:41,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:36:41,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:36:41,267 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:36:41,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-27 23:36:41,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:36:41,341 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 23:36:41,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:36:42,515 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-27 23:36:42,515 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:36:42,515 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:36:42,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968269494] [2024-11-27 23:36:42,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968269494] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:36:42,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:36:42,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-27 23:36:42,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476577448] [2024-11-27 23:36:42,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:36:42,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-27 23:36:42,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:36:42,516 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-27 23:36:42,516 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-27 23:36:42,517 INFO L87 Difference]: Start difference. First operand 275 states and 339 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 23:36:44,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:36:44,405 INFO L93 Difference]: Finished difference Result 303 states and 368 transitions. [2024-11-27 23:36:44,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 23:36:44,406 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2024-11-27 23:36:44,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:36:44,407 INFO L225 Difference]: With dead ends: 303 [2024-11-27 23:36:44,407 INFO L226 Difference]: Without dead ends: 240 [2024-11-27 23:36:44,407 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-27 23:36:44,408 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 36 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-27 23:36:44,408 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 639 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-27 23:36:44,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2024-11-27 23:36:44,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 224. [2024-11-27 23:36:44,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 191 states have (on average 1.1675392670157068) internal successors, (223), 195 states have internal predecessors, (223), 23 states have call successors, (23), 7 states have call predecessors, (23), 9 states have return successors, (24), 22 states have call predecessors, (24), 21 states have call successors, (24) [2024-11-27 23:36:44,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 270 transitions. [2024-11-27 23:36:44,428 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 270 transitions. Word has length 54 [2024-11-27 23:36:44,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:36:44,428 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 270 transitions. [2024-11-27 23:36:44,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 23:36:44,428 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 270 transitions. [2024-11-27 23:36:44,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-27 23:36:44,431 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:36:44,431 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:36:44,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-27 23:36:44,631 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:36:44,632 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:36:44,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:36:44,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1379347739, now seen corresponding path program 1 times [2024-11-27 23:36:44,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:36:44,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1338296208] [2024-11-27 23:36:44,632 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:36:44,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:36:44,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:36:44,635 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:36:44,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-27 23:36:44,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:36:44,713 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 23:36:44,714 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:37:01,994 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-27 23:37:01,994 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:37:03,878 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:37:03,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338296208] [2024-11-27 23:37:03,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338296208] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:37:03,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [260579267] [2024-11-27 23:37:03,879 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:37:03,879 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-27 23:37:03,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-27 23:37:03,881 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-27 23:37:03,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2024-11-27 23:37:04,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:37:04,032 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 23:37:04,034 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:37:16,890 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-27 23:37:16,890 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:37:16,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [260579267] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:37:16,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:37:16,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 12 [2024-11-27 23:37:16,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439290746] [2024-11-27 23:37:16,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:37:16,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 23:37:16,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:37:16,891 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 23:37:16,892 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=236, Unknown=4, NotChecked=0, Total=306 [2024-11-27 23:37:16,892 INFO L87 Difference]: Start difference. First operand 224 states and 270 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 23:37:20,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:37:24,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:37:29,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:37:33,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:37:37,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:37:41,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:37:46,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:37:50,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:37:55,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:37:55,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:37:55,323 INFO L93 Difference]: Finished difference Result 234 states and 279 transitions. [2024-11-27 23:37:55,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 23:37:55,324 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2024-11-27 23:37:55,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:37:55,325 INFO L225 Difference]: With dead ends: 234 [2024-11-27 23:37:55,325 INFO L226 Difference]: Without dead ends: 232 [2024-11-27 23:37:55,325 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=73, Invalid=265, Unknown=4, NotChecked=0, Total=342 [2024-11-27 23:37:55,326 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 7 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.3s IncrementalHoareTripleChecker+Time [2024-11-27 23:37:55,326 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 562 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 9 Unknown, 0 Unchecked, 38.3s Time] [2024-11-27 23:37:55,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-11-27 23:37:55,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 222. [2024-11-27 23:37:55,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 191 states have (on average 1.1675392670157068) internal successors, (223), 193 states have internal predecessors, (223), 21 states have call successors, (21), 7 states have call predecessors, (21), 9 states have return successors, (22), 22 states have call predecessors, (22), 19 states have call successors, (22) [2024-11-27 23:37:55,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 266 transitions. [2024-11-27 23:37:55,343 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 266 transitions. Word has length 54 [2024-11-27 23:37:55,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:37:55,344 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 266 transitions. [2024-11-27 23:37:55,344 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 23:37:55,344 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 266 transitions. [2024-11-27 23:37:55,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-27 23:37:55,345 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:37:55,345 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:37:55,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-27 23:37:55,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (42)] Ended with exit code 0 [2024-11-27 23:37:55,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-27 23:37:55,746 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:37:55,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:37:55,746 INFO L85 PathProgramCache]: Analyzing trace with hash -324137263, now seen corresponding path program 1 times [2024-11-27 23:37:55,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:37:55,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1684871160] [2024-11-27 23:37:55,747 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:37:55,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:37:55,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:37:55,749 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:37:55,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-27 23:37:55,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:37:55,822 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 23:37:55,823 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:37:56,291 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-27 23:37:56,291 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:37:56,291 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:37:56,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684871160] [2024-11-27 23:37:56,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684871160] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:37:56,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:37:56,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 23:37:56,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507720729] [2024-11-27 23:37:56,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:37:56,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 23:37:56,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:37:56,293 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 23:37:56,293 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 23:37:56,293 INFO L87 Difference]: Start difference. First operand 222 states and 266 transitions. Second operand has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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) [2024-11-27 23:37:56,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:37:56,680 INFO L93 Difference]: Finished difference Result 234 states and 278 transitions. [2024-11-27 23:37:56,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 23:37:56,681 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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 59 [2024-11-27 23:37:56,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:37:56,683 INFO L225 Difference]: With dead ends: 234 [2024-11-27 23:37:56,683 INFO L226 Difference]: Without dead ends: 232 [2024-11-27 23:37:56,683 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-27 23:37:56,684 INFO L435 NwaCegarLoop]: 92 mSDtfsCounter, 8 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 23:37:56,684 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 444 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 23:37:56,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-11-27 23:37:56,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 228. [2024-11-27 23:37:56,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 195 states have (on average 1.1641025641025642) internal successors, (227), 198 states have internal predecessors, (227), 22 states have call successors, (22), 8 states have call predecessors, (22), 10 states have return successors, (23), 22 states have call predecessors, (23), 20 states have call successors, (23) [2024-11-27 23:37:56,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 272 transitions. [2024-11-27 23:37:56,712 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 272 transitions. Word has length 59 [2024-11-27 23:37:56,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:37:56,713 INFO L471 AbstractCegarLoop]: Abstraction has 228 states and 272 transitions. [2024-11-27 23:37:56,713 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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) [2024-11-27 23:37:56,713 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 272 transitions. [2024-11-27 23:37:56,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-27 23:37:56,714 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:37:56,714 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:37:56,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-11-27 23:37:56,915 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:37:56,915 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:37:56,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:37:56,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1721027925, now seen corresponding path program 1 times [2024-11-27 23:37:56,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:37:56,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1361388802] [2024-11-27 23:37:56,916 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:37:56,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:37:56,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:37:56,917 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:37:56,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-27 23:37:56,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:37:56,995 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 23:37:56,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:37:57,440 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-27 23:37:57,440 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:37:57,440 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:37:57,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361388802] [2024-11-27 23:37:57,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361388802] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:37:57,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:37:57,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 23:37:57,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821833771] [2024-11-27 23:37:57,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:37:57,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 23:37:57,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:37:57,441 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 23:37:57,442 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 23:37:57,442 INFO L87 Difference]: Start difference. First operand 228 states and 272 transitions. Second operand has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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) [2024-11-27 23:37:57,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:37:57,988 INFO L93 Difference]: Finished difference Result 249 states and 293 transitions. [2024-11-27 23:37:57,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 23:37:57,988 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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 59 [2024-11-27 23:37:57,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:37:57,990 INFO L225 Difference]: With dead ends: 249 [2024-11-27 23:37:57,990 INFO L226 Difference]: Without dead ends: 247 [2024-11-27 23:37:57,990 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-27 23:37:57,991 INFO L435 NwaCegarLoop]: 104 mSDtfsCounter, 19 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-27 23:37:57,991 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 492 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-27 23:37:57,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-11-27 23:37:58,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 232. [2024-11-27 23:37:58,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 198 states have (on average 1.1616161616161615) internal successors, (230), 201 states have internal predecessors, (230), 22 states have call successors, (22), 9 states have call predecessors, (22), 11 states have return successors, (23), 22 states have call predecessors, (23), 20 states have call successors, (23) [2024-11-27 23:37:58,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 275 transitions. [2024-11-27 23:37:58,019 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 275 transitions. Word has length 59 [2024-11-27 23:37:58,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:37:58,020 INFO L471 AbstractCegarLoop]: Abstraction has 232 states and 275 transitions. [2024-11-27 23:37:58,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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) [2024-11-27 23:37:58,020 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 275 transitions. [2024-11-27 23:37:58,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-27 23:37:58,021 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:37:58,021 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:37:58,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-27 23:37:58,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:37:58,222 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:37:58,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:37:58,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1001210711, now seen corresponding path program 1 times [2024-11-27 23:37:58,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:37:58,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [830396726] [2024-11-27 23:37:58,223 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:37:58,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:37:58,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:37:58,225 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:37:58,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-27 23:37:58,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:37:58,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-27 23:37:58,310 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:38:03,644 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-27 23:38:03,644 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:38:03,644 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:38:03,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830396726] [2024-11-27 23:38:03,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830396726] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:38:03,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:38:03,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-11-27 23:38:03,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308486581] [2024-11-27 23:38:03,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:38:03,645 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-27 23:38:03,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:38:03,645 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-27 23:38:03,646 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2024-11-27 23:38:03,646 INFO L87 Difference]: Start difference. First operand 232 states and 275 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 23:38:09,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:38:10,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:38:15,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:38:17,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:38:22,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:38:22,069 INFO L93 Difference]: Finished difference Result 319 states and 385 transitions. [2024-11-27 23:38:22,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-27 23:38:22,071 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 64 [2024-11-27 23:38:22,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:38:22,072 INFO L225 Difference]: With dead ends: 319 [2024-11-27 23:38:22,072 INFO L226 Difference]: Without dead ends: 289 [2024-11-27 23:38:22,072 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2024-11-27 23:38:22,073 INFO L435 NwaCegarLoop]: 105 mSDtfsCounter, 30 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:38:22,073 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 878 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 503 Invalid, 1 Unknown, 0 Unchecked, 18.1s Time] [2024-11-27 23:38:22,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2024-11-27 23:38:22,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 241. [2024-11-27 23:38:22,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 206 states have (on average 1.1650485436893203) internal successors, (240), 209 states have internal predecessors, (240), 23 states have call successors, (23), 9 states have call predecessors, (23), 11 states have return successors, (24), 23 states have call predecessors, (24), 21 states have call successors, (24) [2024-11-27 23:38:22,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 287 transitions. [2024-11-27 23:38:22,104 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 287 transitions. Word has length 64 [2024-11-27 23:38:22,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:38:22,105 INFO L471 AbstractCegarLoop]: Abstraction has 241 states and 287 transitions. [2024-11-27 23:38:22,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 23:38:22,105 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 287 transitions. [2024-11-27 23:38:22,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-27 23:38:22,106 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:38:22,106 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:38:22,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-11-27 23:38:22,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:38:22,307 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:38:22,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:38:22,308 INFO L85 PathProgramCache]: Analyzing trace with hash 922017323, now seen corresponding path program 1 times [2024-11-27 23:38:22,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:38:22,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2013010783] [2024-11-27 23:38:22,308 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:38:22,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:38:22,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:38:22,310 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:38:22,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-27 23:38:22,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:38:22,412 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-27 23:38:22,414 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:38:26,017 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-27 23:38:26,017 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:38:26,017 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:38:26,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013010783] [2024-11-27 23:38:26,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013010783] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:38:26,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:38:26,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-11-27 23:38:26,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508905820] [2024-11-27 23:38:26,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:38:26,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-27 23:38:26,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:38:26,018 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-27 23:38:26,019 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-11-27 23:38:26,019 INFO L87 Difference]: Start difference. First operand 241 states and 287 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 23:38:32,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:38:37,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:38:37,243 INFO L93 Difference]: Finished difference Result 327 states and 395 transitions. [2024-11-27 23:38:37,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-27 23:38:37,244 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 64 [2024-11-27 23:38:37,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:38:37,246 INFO L225 Difference]: With dead ends: 327 [2024-11-27 23:38:37,246 INFO L226 Difference]: Without dead ends: 297 [2024-11-27 23:38:37,247 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2024-11-27 23:38:37,247 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 27 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2024-11-27 23:38:37,247 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 677 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 409 Invalid, 1 Unknown, 0 Unchecked, 9.3s Time] [2024-11-27 23:38:37,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2024-11-27 23:38:37,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 240. [2024-11-27 23:38:37,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 205 states have (on average 1.1609756097560975) internal successors, (238), 208 states have internal predecessors, (238), 23 states have call successors, (23), 9 states have call predecessors, (23), 11 states have return successors, (24), 23 states have call predecessors, (24), 21 states have call successors, (24) [2024-11-27 23:38:37,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 285 transitions. [2024-11-27 23:38:37,266 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 285 transitions. Word has length 64 [2024-11-27 23:38:37,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:38:37,267 INFO L471 AbstractCegarLoop]: Abstraction has 240 states and 285 transitions. [2024-11-27 23:38:37,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 23:38:37,267 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 285 transitions. [2024-11-27 23:38:37,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-27 23:38:37,268 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:38:37,268 INFO L218 NwaCegarLoop]: trace histogram [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, 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] [2024-11-27 23:38:37,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-11-27 23:38:37,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:38:37,469 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:38:37,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:38:37,469 INFO L85 PathProgramCache]: Analyzing trace with hash -298738180, now seen corresponding path program 1 times [2024-11-27 23:38:37,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:38:37,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1595946879] [2024-11-27 23:38:37,469 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:38:37,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:38:37,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:38:37,472 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:38:37,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-27 23:38:37,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:38:37,557 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 23:38:37,559 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:38:39,145 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 23:38:39,145 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:38:40,065 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 23:38:40,066 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:38:40,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595946879] [2024-11-27 23:38:40,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595946879] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:38:40,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:38:40,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2024-11-27 23:38:40,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699341164] [2024-11-27 23:38:40,066 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:38:40,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 23:38:40,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:38:40,067 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 23:38:40,067 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-27 23:38:40,068 INFO L87 Difference]: Start difference. First operand 240 states and 285 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-27 23:38:42,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:38:42,899 INFO L93 Difference]: Finished difference Result 314 states and 372 transitions. [2024-11-27 23:38:42,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-27 23:38:42,900 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 65 [2024-11-27 23:38:42,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:38:42,901 INFO L225 Difference]: With dead ends: 314 [2024-11-27 23:38:42,901 INFO L226 Difference]: Without dead ends: 295 [2024-11-27 23:38:42,902 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2024-11-27 23:38:42,903 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 46 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:38:42,903 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 769 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-27 23:38:42,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2024-11-27 23:38:42,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 267. [2024-11-27 23:38:42,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 229 states have (on average 1.1528384279475983) internal successors, (264), 233 states have internal predecessors, (264), 26 states have call successors, (26), 9 states have call predecessors, (26), 11 states have return successors, (27), 26 states have call predecessors, (27), 24 states have call successors, (27) [2024-11-27 23:38:42,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 317 transitions. [2024-11-27 23:38:42,932 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 317 transitions. Word has length 65 [2024-11-27 23:38:42,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:38:42,932 INFO L471 AbstractCegarLoop]: Abstraction has 267 states and 317 transitions. [2024-11-27 23:38:42,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-27 23:38:42,933 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 317 transitions. [2024-11-27 23:38:42,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-27 23:38:42,933 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:38:42,934 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:38:42,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-11-27 23:38:43,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:38:43,134 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:38:43,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:38:43,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1293680078, now seen corresponding path program 1 times [2024-11-27 23:38:43,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:38:43,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [43628341] [2024-11-27 23:38:43,135 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:38:43,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:38:43,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:38:43,137 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:38:43,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-27 23:38:43,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:38:43,224 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-27 23:38:43,227 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:38:50,764 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-27 23:38:50,764 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:38:55,343 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:38:55,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43628341] [2024-11-27 23:38:55,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43628341] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:38:55,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [959803600] [2024-11-27 23:38:55,344 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:38:55,344 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-27 23:38:55,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-27 23:38:55,346 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-27 23:38:55,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2024-11-27 23:38:55,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:38:55,519 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-27 23:38:55,521 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:39:04,408 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-27 23:39:04,408 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:39:04,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [959803600] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:39:04,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:39:04,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 18 [2024-11-27 23:39:04,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753437533] [2024-11-27 23:39:04,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:39:04,409 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-27 23:39:04,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:39:04,410 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-27 23:39:04,410 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=404, Unknown=2, NotChecked=0, Total=462 [2024-11-27 23:39:04,410 INFO L87 Difference]: Start difference. First operand 267 states and 317 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 23:39:11,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:39:11,994 INFO L93 Difference]: Finished difference Result 356 states and 429 transitions. [2024-11-27 23:39:11,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 23:39:11,995 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 65 [2024-11-27 23:39:11,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:39:11,997 INFO L225 Difference]: With dead ends: 356 [2024-11-27 23:39:11,997 INFO L226 Difference]: Without dead ends: 326 [2024-11-27 23:39:11,998 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=61, Invalid=443, Unknown=2, NotChecked=0, Total=506 [2024-11-27 23:39:11,998 INFO L435 NwaCegarLoop]: 114 mSDtfsCounter, 30 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:39:11,999 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 873 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2024-11-27 23:39:11,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2024-11-27 23:39:12,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 269. [2024-11-27 23:39:12,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 231 states have (on average 1.1601731601731602) internal successors, (268), 235 states have internal predecessors, (268), 26 states have call successors, (26), 9 states have call predecessors, (26), 11 states have return successors, (27), 26 states have call predecessors, (27), 24 states have call successors, (27) [2024-11-27 23:39:12,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 321 transitions. [2024-11-27 23:39:12,029 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 321 transitions. Word has length 65 [2024-11-27 23:39:12,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:39:12,029 INFO L471 AbstractCegarLoop]: Abstraction has 269 states and 321 transitions. [2024-11-27 23:39:12,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 23:39:12,030 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 321 transitions. [2024-11-27 23:39:12,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-27 23:39:12,031 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:39:12,031 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:39:12,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (49)] Ended with exit code 0 [2024-11-27 23:39:12,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-11-27 23:39:12,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:12,432 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:39:12,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:39:12,432 INFO L85 PathProgramCache]: Analyzing trace with hash 524402232, now seen corresponding path program 1 times [2024-11-27 23:39:12,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:39:12,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1916304612] [2024-11-27 23:39:12,433 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:39:12,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:12,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:39:12,435 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:39:12,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-11-27 23:39:12,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:39:12,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-27 23:39:12,528 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:39:15,229 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-27 23:39:15,229 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:39:15,229 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:39:15,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916304612] [2024-11-27 23:39:15,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916304612] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:39:15,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:39:15,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-27 23:39:15,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069292749] [2024-11-27 23:39:15,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:39:15,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-27 23:39:15,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:39:15,231 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-27 23:39:15,231 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-27 23:39:15,232 INFO L87 Difference]: Start difference. First operand 269 states and 321 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 23:39:18,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:39:18,760 INFO L93 Difference]: Finished difference Result 308 states and 365 transitions. [2024-11-27 23:39:18,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 23:39:18,762 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 65 [2024-11-27 23:39:18,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:39:18,763 INFO L225 Difference]: With dead ends: 308 [2024-11-27 23:39:18,763 INFO L226 Difference]: Without dead ends: 290 [2024-11-27 23:39:18,764 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-27 23:39:18,764 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 3 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2024-11-27 23:39:18,764 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 751 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2024-11-27 23:39:18,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2024-11-27 23:39:18,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 273. [2024-11-27 23:39:18,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 234 states have (on average 1.1538461538461537) internal successors, (270), 238 states have internal predecessors, (270), 27 states have call successors, (27), 9 states have call predecessors, (27), 11 states have return successors, (28), 27 states have call predecessors, (28), 25 states have call successors, (28) [2024-11-27 23:39:18,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 325 transitions. [2024-11-27 23:39:18,805 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 325 transitions. Word has length 65 [2024-11-27 23:39:18,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:39:18,805 INFO L471 AbstractCegarLoop]: Abstraction has 273 states and 325 transitions. [2024-11-27 23:39:18,805 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 23:39:18,805 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 325 transitions. [2024-11-27 23:39:18,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-27 23:39:18,807 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:39:18,807 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:39:18,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2024-11-27 23:39:19,007 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:19,008 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:39:19,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:39:19,008 INFO L85 PathProgramCache]: Analyzing trace with hash 784206988, now seen corresponding path program 1 times [2024-11-27 23:39:19,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:39:19,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [257026778] [2024-11-27 23:39:19,009 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:39:19,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:19,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:39:19,011 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:39:19,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-27 23:39:19,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:39:19,098 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-27 23:39:19,104 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:39:20,414 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-27 23:39:20,414 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:39:20,415 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:39:20,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257026778] [2024-11-27 23:39:20,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257026778] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:39:20,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:39:20,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-27 23:39:20,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503727459] [2024-11-27 23:39:20,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:39:20,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 23:39:20,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:39:20,416 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 23:39:20,416 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-27 23:39:20,416 INFO L87 Difference]: Start difference. First operand 273 states and 325 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 23:39:24,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:39:25,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:39:25,775 INFO L93 Difference]: Finished difference Result 332 states and 394 transitions. [2024-11-27 23:39:25,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 23:39:25,776 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 65 [2024-11-27 23:39:25,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:39:25,778 INFO L225 Difference]: With dead ends: 332 [2024-11-27 23:39:25,778 INFO L226 Difference]: Without dead ends: 302 [2024-11-27 23:39:25,778 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-27 23:39:25,778 INFO L435 NwaCegarLoop]: 104 mSDtfsCounter, 29 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-11-27 23:39:25,779 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 591 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2024-11-27 23:39:25,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2024-11-27 23:39:25,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 249. [2024-11-27 23:39:25,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 214 states have (on average 1.1261682242990654) internal successors, (241), 218 states have internal predecessors, (241), 23 states have call successors, (23), 9 states have call predecessors, (23), 11 states have return successors, (24), 23 states have call predecessors, (24), 21 states have call successors, (24) [2024-11-27 23:39:25,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 288 transitions. [2024-11-27 23:39:25,810 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 288 transitions. Word has length 65 [2024-11-27 23:39:25,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:39:25,810 INFO L471 AbstractCegarLoop]: Abstraction has 249 states and 288 transitions. [2024-11-27 23:39:25,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 23:39:25,811 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 288 transitions. [2024-11-27 23:39:25,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-27 23:39:25,811 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:39:25,812 INFO L218 NwaCegarLoop]: trace histogram [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, 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] [2024-11-27 23:39:25,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2024-11-27 23:39:26,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:26,012 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:39:26,013 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:39:26,013 INFO L85 PathProgramCache]: Analyzing trace with hash -242886238, now seen corresponding path program 1 times [2024-11-27 23:39:26,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:39:26,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1345954022] [2024-11-27 23:39:26,013 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:39:26,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:26,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:39:26,015 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:39:26,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-11-27 23:39:26,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:39:26,090 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 23:39:26,091 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:39:26,520 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-27 23:39:26,521 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:39:26,521 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:39:26,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345954022] [2024-11-27 23:39:26,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345954022] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:39:26,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:39:26,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 23:39:26,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969889038] [2024-11-27 23:39:26,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:39:26,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 23:39:26,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:39:26,522 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 23:39:26,522 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 23:39:26,523 INFO L87 Difference]: Start difference. First operand 249 states and 288 transitions. Second operand has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-27 23:39:27,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:39:27,027 INFO L93 Difference]: Finished difference Result 279 states and 320 transitions. [2024-11-27 23:39:27,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 23:39:27,028 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 67 [2024-11-27 23:39:27,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:39:27,030 INFO L225 Difference]: With dead ends: 279 [2024-11-27 23:39:27,030 INFO L226 Difference]: Without dead ends: 265 [2024-11-27 23:39:27,030 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-27 23:39:27,031 INFO L435 NwaCegarLoop]: 103 mSDtfsCounter, 14 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-27 23:39:27,031 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 485 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-27 23:39:27,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2024-11-27 23:39:27,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 216. [2024-11-27 23:39:27,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 182 states have (on average 1.1318681318681318) internal successors, (206), 189 states have internal predecessors, (206), 22 states have call successors, (22), 9 states have call predecessors, (22), 11 states have return successors, (23), 19 states have call predecessors, (23), 20 states have call successors, (23) [2024-11-27 23:39:27,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 251 transitions. [2024-11-27 23:39:27,056 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 251 transitions. Word has length 67 [2024-11-27 23:39:27,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:39:27,056 INFO L471 AbstractCegarLoop]: Abstraction has 216 states and 251 transitions. [2024-11-27 23:39:27,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-27 23:39:27,056 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 251 transitions. [2024-11-27 23:39:27,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-27 23:39:27,057 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:39:27,057 INFO L218 NwaCegarLoop]: trace histogram [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, 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] [2024-11-27 23:39:27,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-11-27 23:39:27,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:27,257 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:39:27,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:39:27,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1719764324, now seen corresponding path program 1 times [2024-11-27 23:39:27,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:39:27,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [662099607] [2024-11-27 23:39:27,258 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:39:27,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:27,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:39:27,260 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:39:27,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-11-27 23:39:27,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:39:27,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 23:39:27,350 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:39:27,795 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-27 23:39:27,795 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:39:27,796 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:39:27,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662099607] [2024-11-27 23:39:27,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662099607] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:39:27,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:39:27,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 23:39:27,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383835473] [2024-11-27 23:39:27,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:39:27,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 23:39:27,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:39:27,797 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 23:39:27,797 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 23:39:27,798 INFO L87 Difference]: Start difference. First operand 216 states and 251 transitions. Second operand has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-27 23:39:28,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:39:28,293 INFO L93 Difference]: Finished difference Result 241 states and 277 transitions. [2024-11-27 23:39:28,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 23:39:28,293 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 67 [2024-11-27 23:39:28,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:39:28,295 INFO L225 Difference]: With dead ends: 241 [2024-11-27 23:39:28,295 INFO L226 Difference]: Without dead ends: 162 [2024-11-27 23:39:28,295 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-27 23:39:28,296 INFO L435 NwaCegarLoop]: 101 mSDtfsCounter, 14 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-27 23:39:28,296 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 478 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-27 23:39:28,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-11-27 23:39:28,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 130. [2024-11-27 23:39:28,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 109 states have (on average 1.165137614678899) internal successors, (127), 114 states have internal predecessors, (127), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-27 23:39:28,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 152 transitions. [2024-11-27 23:39:28,315 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 152 transitions. Word has length 67 [2024-11-27 23:39:28,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:39:28,315 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 152 transitions. [2024-11-27 23:39:28,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-27 23:39:28,315 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 152 transitions. [2024-11-27 23:39:28,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-27 23:39:28,316 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:39:28,316 INFO L218 NwaCegarLoop]: trace histogram [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, 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] [2024-11-27 23:39:28,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2024-11-27 23:39:28,516 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:28,516 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:39:28,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:39:28,517 INFO L85 PathProgramCache]: Analyzing trace with hash -626934387, now seen corresponding path program 1 times [2024-11-27 23:39:28,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:39:28,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1736239028] [2024-11-27 23:39:28,517 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:39:28,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:28,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:39:28,520 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:39:28,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-11-27 23:39:28,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:39:28,601 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 23:39:28,603 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:39:29,778 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-27 23:39:29,778 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:39:30,704 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 23:39:30,705 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:39:30,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736239028] [2024-11-27 23:39:30,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736239028] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:39:30,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:39:30,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2024-11-27 23:39:30,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597496899] [2024-11-27 23:39:30,705 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:39:30,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-27 23:39:30,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:39:30,706 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-27 23:39:30,706 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-27 23:39:30,707 INFO L87 Difference]: Start difference. First operand 130 states and 152 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 23:39:32,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:39:32,423 INFO L93 Difference]: Finished difference Result 159 states and 179 transitions. [2024-11-27 23:39:32,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 23:39:32,424 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 66 [2024-11-27 23:39:32,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:39:32,425 INFO L225 Difference]: With dead ends: 159 [2024-11-27 23:39:32,425 INFO L226 Difference]: Without dead ends: 106 [2024-11-27 23:39:32,426 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-27 23:39:32,426 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 8 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:39:32,427 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 601 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-27 23:39:32,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-27 23:39:32,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2024-11-27 23:39:32,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 87 states have (on average 1.160919540229885) internal successors, (101), 92 states have internal predecessors, (101), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-27 23:39:32,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 122 transitions. [2024-11-27 23:39:32,442 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 122 transitions. Word has length 66 [2024-11-27 23:39:32,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:39:32,442 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 122 transitions. [2024-11-27 23:39:32,442 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 23:39:32,443 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 122 transitions. [2024-11-27 23:39:32,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-27 23:39:32,443 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:39:32,444 INFO L218 NwaCegarLoop]: trace histogram [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, 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] [2024-11-27 23:39:32,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2024-11-27 23:39:32,644 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:32,644 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:39:32,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:39:32,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1229804565, now seen corresponding path program 1 times [2024-11-27 23:39:32,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:39:32,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1298513468] [2024-11-27 23:39:32,645 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:39:32,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:32,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:39:32,647 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:39:32,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-11-27 23:39:32,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:39:32,720 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 23:39:32,721 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:39:33,158 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-27 23:39:33,158 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:39:33,158 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:39:33,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298513468] [2024-11-27 23:39:33,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298513468] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:39:33,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:39:33,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 23:39:33,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32897040] [2024-11-27 23:39:33,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:39:33,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:39:33,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:39:33,160 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:39:33,160 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:39:33,160 INFO L87 Difference]: Start difference. First operand 106 states and 122 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 23:39:33,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:39:33,239 INFO L93 Difference]: Finished difference Result 116 states and 131 transitions. [2024-11-27 23:39:33,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 23:39:33,240 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 68 [2024-11-27 23:39:33,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:39:33,241 INFO L225 Difference]: With dead ends: 116 [2024-11-27 23:39:33,241 INFO L226 Difference]: Without dead ends: 67 [2024-11-27 23:39:33,241 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:39:33,242 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 13 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:39:33,242 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 175 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:39:33,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-27 23:39:33,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-11-27 23:39:33,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 55 states have internal predecessors, (60), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 23:39:33,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2024-11-27 23:39:33,252 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 68 [2024-11-27 23:39:33,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:39:33,252 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2024-11-27 23:39:33,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 23:39:33,252 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2024-11-27 23:39:33,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-27 23:39:33,253 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:39:33,253 INFO L218 NwaCegarLoop]: trace histogram [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, 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] [2024-11-27 23:39:33,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2024-11-27 23:39:33,453 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:33,453 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:39:33,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:39:33,454 INFO L85 PathProgramCache]: Analyzing trace with hash -2089156486, now seen corresponding path program 1 times [2024-11-27 23:39:33,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:39:33,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [748129281] [2024-11-27 23:39:33,454 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:39:33,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:33,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:39:33,456 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:39:33,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-11-27 23:39:33,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:39:33,611 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-27 23:39:33,614 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:39:38,180 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-27 23:39:38,180 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:39:42,962 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:39:42,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748129281] [2024-11-27 23:39:42,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748129281] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:39:42,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [361981363] [2024-11-27 23:39:42,962 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:39:42,963 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-27 23:39:42,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-27 23:39:42,965 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-27 23:39:42,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2024-11-27 23:39:43,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:39:43,165 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-27 23:39:43,167 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:39:48,099 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-27 23:39:48,099 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:39:48,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [361981363] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:39:48,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:39:48,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [14] total 19 [2024-11-27 23:39:48,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035889015] [2024-11-27 23:39:48,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:39:48,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-27 23:39:48,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:39:48,100 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-27 23:39:48,100 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2024-11-27 23:39:48,101 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-27 23:39:53,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:39:53,090 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2024-11-27 23:39:53,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 23:39:53,091 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 72 [2024-11-27 23:39:53,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:39:53,092 INFO L225 Difference]: With dead ends: 95 [2024-11-27 23:39:53,092 INFO L226 Difference]: Without dead ends: 79 [2024-11-27 23:39:53,093 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 142 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2024-11-27 23:39:53,094 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 14 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-27 23:39:53,094 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 414 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-27 23:39:53,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-27 23:39:53,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2024-11-27 23:39:53,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 60 states have (on average 1.1) internal successors, (66), 61 states have internal predecessors, (66), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-27 23:39:53,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2024-11-27 23:39:53,107 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 72 [2024-11-27 23:39:53,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:39:53,107 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2024-11-27 23:39:53,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-27 23:39:53,107 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2024-11-27 23:39:53,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-27 23:39:53,108 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:39:53,108 INFO L218 NwaCegarLoop]: trace histogram [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, 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] [2024-11-27 23:39:53,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (57)] Ended with exit code 0 [2024-11-27 23:39:53,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2024-11-27 23:39:53,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:53,512 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:39:53,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:39:53,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1361805308, now seen corresponding path program 1 times [2024-11-27 23:39:53,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:39:53,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [211027287] [2024-11-27 23:39:53,516 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:39:53,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:53,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:39:53,520 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:39:53,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-11-27 23:39:53,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:39:53,649 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-27 23:39:53,651 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:39:59,306 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-27 23:39:59,306 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:39:59,306 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:39:59,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211027287] [2024-11-27 23:39:59,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211027287] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:39:59,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:39:59,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-11-27 23:39:59,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276840809] [2024-11-27 23:39:59,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:39:59,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 23:39:59,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:39:59,307 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 23:39:59,307 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2024-11-27 23:39:59,308 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-27 23:40:04,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:40:04,163 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2024-11-27 23:40:04,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-27 23:40:04,164 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 72 [2024-11-27 23:40:04,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:40:04,165 INFO L225 Difference]: With dead ends: 91 [2024-11-27 23:40:04,165 INFO L226 Difference]: Without dead ends: 75 [2024-11-27 23:40:04,165 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2024-11-27 23:40:04,166 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 3 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-11-27 23:40:04,166 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 481 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2024-11-27 23:40:04,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-27 23:40:04,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2024-11-27 23:40:04,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 55 states have internal predecessors, (59), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 23:40:04,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2024-11-27 23:40:04,174 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 72 [2024-11-27 23:40:04,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:40:04,175 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2024-11-27 23:40:04,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-27 23:40:04,175 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2024-11-27 23:40:04,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-27 23:40:04,175 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:40:04,176 INFO L218 NwaCegarLoop]: trace histogram [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, 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] [2024-11-27 23:40:04,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2024-11-27 23:40:04,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:40:04,376 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:40:04,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:40:04,376 INFO L85 PathProgramCache]: Analyzing trace with hash 22432927, now seen corresponding path program 1 times [2024-11-27 23:40:04,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:40:04,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [828294560] [2024-11-27 23:40:04,377 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:40:04,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:40:04,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:40:04,381 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:40:04,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-11-27 23:40:04,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:40:04,461 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-27 23:40:04,463 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:40:08,797 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-27 23:40:08,798 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:40:08,798 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:40:08,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828294560] [2024-11-27 23:40:08,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828294560] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:40:08,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:40:08,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-11-27 23:40:08,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197536317] [2024-11-27 23:40:08,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:40:08,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 23:40:08,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:40:08,799 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 23:40:08,799 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2024-11-27 23:40:08,799 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-27 23:40:13,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:40:13,022 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2024-11-27 23:40:13,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-27 23:40:13,022 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 73 [2024-11-27 23:40:13,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:40:13,023 INFO L225 Difference]: With dead ends: 91 [2024-11-27 23:40:13,023 INFO L226 Difference]: Without dead ends: 67 [2024-11-27 23:40:13,024 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2024-11-27 23:40:13,024 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 3 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:40:13,024 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 476 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2024-11-27 23:40:13,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-27 23:40:13,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-11-27 23:40:13,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 55 states have internal predecessors, (58), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 23:40:13,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2024-11-27 23:40:13,031 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 73 [2024-11-27 23:40:13,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:40:13,031 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2024-11-27 23:40:13,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-27 23:40:13,032 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2024-11-27 23:40:13,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-27 23:40:13,032 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:40:13,032 INFO L218 NwaCegarLoop]: trace histogram [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, 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] [2024-11-27 23:40:13,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2024-11-27 23:40:13,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:40:13,233 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:40:13,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:40:13,233 INFO L85 PathProgramCache]: Analyzing trace with hash -371933859, now seen corresponding path program 1 times [2024-11-27 23:40:13,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:40:13,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [124535966] [2024-11-27 23:40:13,233 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:40:13,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:40:13,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:40:13,235 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:40:13,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-11-27 23:40:13,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:40:13,316 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-27 23:40:13,318 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:40:18,265 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-27 23:40:18,266 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:40:18,266 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:40:18,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124535966] [2024-11-27 23:40:18,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124535966] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:40:18,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:40:18,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-27 23:40:18,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695039729] [2024-11-27 23:40:18,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:40:18,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 23:40:18,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:40:18,267 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 23:40:18,267 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-27 23:40:18,267 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-27 23:40:21,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:40:21,398 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2024-11-27 23:40:21,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 23:40:21,399 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 73 [2024-11-27 23:40:21,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:40:21,400 INFO L225 Difference]: With dead ends: 67 [2024-11-27 23:40:21,400 INFO L226 Difference]: Without dead ends: 0 [2024-11-27 23:40:21,400 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-11-27 23:40:21,400 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 12 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:40:21,401 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 342 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-27 23:40:21,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-27 23:40:21,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-27 23:40:21,401 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) [2024-11-27 23:40:21,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-27 23:40:21,401 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2024-11-27 23:40:21,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:40:21,402 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-27 23:40:21,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-27 23:40:21,402 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-27 23:40:21,402 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-27 23:40:21,405 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2024-11-27 23:40:21,405 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-11-27 23:40:21,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2024-11-27 23:40:21,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:40:21,611 INFO L422 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:40:21,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-27 23:41:11,321 WARN L286 SmtUtils]: Spent 49.70s on a formula simplification. DAG size of input: 177 DAG size of output: 227 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-11-27 23:41:46,419 WARN L286 SmtUtils]: Spent 30.97s on a formula simplification. DAG size of input: 227 DAG size of output: 37 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-11-27 23:43:12,267 WARN L286 SmtUtils]: Spent 1.43m on a formula simplification. DAG size of input: 251 DAG size of output: 129 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-11-27 23:43:39,564 WARN L286 SmtUtils]: Spent 26.96s on a formula simplification. DAG size of input: 193 DAG size of output: 85 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-11-27 23:44:20,088 WARN L286 SmtUtils]: Spent 40.15s on a formula simplification. DAG size of input: 258 DAG size of output: 117 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-11-27 23:44:21,607 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-27 23:44:21,620 WARN L970 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: currentRoundingMode [2024-11-27 23:44:21,620 WARN L970 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: ~roundNearestTiesToEven [2024-11-27 23:44:21,623 WARN L970 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: currentRoundingMode [2024-11-27 23:44:21,623 WARN L970 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: ~roundNearestTiesToEven [2024-11-27 23:44:21,624 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.11 11:44:21 BoogieIcfgContainer [2024-11-27 23:44:21,624 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-27 23:44:21,625 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-27 23:44:21,625 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-27 23:44:21,625 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-27 23:44:21,625 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:30:56" (3/4) ... [2024-11-27 23:44:21,627 INFO L146 WitnessPrinter]: Generating witness for correct program [2024-11-27 23:44:21,632 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure base2flt [2024-11-27 23:44:21,633 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-11-27 23:44:21,639 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2024-11-27 23:44:21,640 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2024-11-27 23:44:21,640 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-11-27 23:44:21,640 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-27 23:44:21,673 WARN L216 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (0 != \old(m)) [2024-11-27 23:44:21,673 WARN L216 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (0 != \old(m)) [2024-11-27 23:44:21,701 WARN L141 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (0 != \old(m)) [2024-11-27 23:44:21,702 WARN L141 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (0 != \old(m)) [2024-11-27 23:44:21,759 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/witness.graphml [2024-11-27 23:44:21,760 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/witness.yml [2024-11-27 23:44:21,760 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-27 23:44:21,761 INFO L158 Benchmark]: Toolchain (without parser) took 811013.38ms. Allocated memory was 83.9MB in the beginning and 486.5MB in the end (delta: 402.7MB). Free memory was 57.4MB in the beginning and 335.8MB in the end (delta: -278.4MB). Peak memory consumption was 124.7MB. Max. memory is 16.1GB. [2024-11-27 23:44:21,761 INFO L158 Benchmark]: CDTParser took 0.45ms. Allocated memory is still 83.9MB. Free memory was 63.4MB in the beginning and 63.4MB in the end (delta: 18.3kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 23:44:21,763 INFO L158 Benchmark]: CACSL2BoogieTranslator took 553.62ms. Allocated memory is still 83.9MB. Free memory was 57.4MB in the beginning and 41.4MB in the end (delta: 16.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-27 23:44:21,763 INFO L158 Benchmark]: Boogie Procedure Inliner took 73.83ms. Allocated memory is still 83.9MB. Free memory was 41.4MB in the beginning and 40.1MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 23:44:21,763 INFO L158 Benchmark]: Boogie Preprocessor took 97.41ms. Allocated memory is still 83.9MB. Free memory was 40.1MB in the beginning and 37.6MB in the end (delta: 2.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 23:44:21,764 INFO L158 Benchmark]: RCFGBuilder took 5013.97ms. Allocated memory is still 83.9MB. Free memory was 37.6MB in the beginning and 55.2MB in the end (delta: -17.6MB). Peak memory consumption was 28.7MB. Max. memory is 16.1GB. [2024-11-27 23:44:21,764 INFO L158 Benchmark]: TraceAbstraction took 805131.20ms. Allocated memory was 83.9MB in the beginning and 486.5MB in the end (delta: 402.7MB). Free memory was 54.2MB in the beginning and 340.0MB in the end (delta: -285.9MB). Peak memory consumption was 280.9MB. Max. memory is 16.1GB. [2024-11-27 23:44:21,764 INFO L158 Benchmark]: Witness Printer took 135.50ms. Allocated memory is still 486.5MB. Free memory was 340.0MB in the beginning and 335.8MB in the end (delta: 4.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-27 23:44:21,765 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.45ms. Allocated memory is still 83.9MB. Free memory was 63.4MB in the beginning and 63.4MB in the end (delta: 18.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 553.62ms. Allocated memory is still 83.9MB. Free memory was 57.4MB in the beginning and 41.4MB in the end (delta: 16.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 73.83ms. Allocated memory is still 83.9MB. Free memory was 41.4MB in the beginning and 40.1MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 97.41ms. Allocated memory is still 83.9MB. Free memory was 40.1MB in the beginning and 37.6MB in the end (delta: 2.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 5013.97ms. Allocated memory is still 83.9MB. Free memory was 37.6MB in the beginning and 55.2MB in the end (delta: -17.6MB). Peak memory consumption was 28.7MB. Max. memory is 16.1GB. * TraceAbstraction took 805131.20ms. Allocated memory was 83.9MB in the beginning and 486.5MB in the end (delta: 402.7MB). Free memory was 54.2MB in the beginning and 340.0MB in the end (delta: -285.9MB). Peak memory consumption was 280.9MB. Max. memory is 16.1GB. * Witness Printer took 135.50ms. Allocated memory is still 486.5MB. Free memory was 340.0MB in the beginning and 335.8MB in the end (delta: 4.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: currentRoundingMode - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: ~roundNearestTiesToEven - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: currentRoundingMode - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: ~roundNearestTiesToEven * 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: 48]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - PositiveResult [Line: 61]: 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, 79 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 565.1s, OverallIterations: 53, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 188.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 15 mSolverCounterUnknown, 1639 SdHoareTripleChecker+Valid, 168.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1519 mSDsluCounter, 30429 SdHoareTripleChecker+Invalid, 166.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 210 IncrementalHoareTripleChecker+Unchecked, 25295 mSDsCounter, 143 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7841 IncrementalHoareTripleChecker+Invalid, 8209 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 143 mSolverCounterUnsat, 5134 mSDtfsCounter, 7841 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3725 GetRequests, 3201 SyntacticMatches, 18 SemanticMatches, 506 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 149.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=373occurred in iteration=26, InterpolantAutomatonStates: 448, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.4s AutomataMinimizationTime, 53 MinimizatonAttempts, 1031 StatesRemovedByMinimization, 43 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 98.5s SatisfiabilityAnalysisTime, 260.8s InterpolantComputationTime, 3049 NumberOfCodeBlocks, 3032 NumberOfCodeBlocksAsserted, 59 NumberOfCheckSat, 3510 ConstructedInterpolants, 169 QuantifiedInterpolants, 12753 SizeOfPredicates, 120 NumberOfNonLiveVariables, 5426 ConjunctsInSsa, 594 ConjunctsInUnsatCore, 70 InterpolantComputations, 43 PerfectInterpolantSequences, 1241/1342 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 2 specifications checked. All of them hold - InvariantResult [Line: 81]: Loop Invariant Derived loop invariant: (0 != \old(m)) - InvariantResult [Line: 101]: Loop Invariant Derived loop invariant: (0 != \old(m)) RESULT: Ultimate proved your program to be correct! [2024-11-27 23:44:21,979 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forcibly destroying the process [2024-11-27 23:44:22,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_884438dd-eb5a-4225-9402-b5a0eb00ee55/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE