./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound10.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_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1 --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 d8ee33f278cd93a3b1e0d551730c6407889b70e338ebc3c857541220d9b0f75f --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 12:24:00,281 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 12:24:00,346 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-12-02 12:24:00,352 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 12:24:00,352 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 12:24:00,377 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 12:24:00,377 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 12:24:00,378 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 12:24:00,378 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 12:24:00,378 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 12:24:00,378 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 12:24:00,378 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 12:24:00,379 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 12:24:00,379 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 12:24:00,379 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 12:24:00,379 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 12:24:00,379 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-12-02 12:24:00,379 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 12:24:00,379 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 12:24:00,380 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 12:24:00,380 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 12:24:00,380 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-12-02 12:24:00,380 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 12:24:00,380 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-12-02 12:24:00,380 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 12:24:00,380 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-12-02 12:24:00,380 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 12:24:00,380 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 12:24:00,380 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 12:24:00,381 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 12:24:00,381 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 12:24:00,381 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 12:24:00,381 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 12:24:00,381 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 12:24:00,381 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 12:24:00,381 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 12:24:00,381 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 12:24:00,381 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 12:24:00,382 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 12:24:00,382 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 12:24:00,382 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-12-02 12:24:00,382 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-12-02 12:24:00,382 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 12:24:00,382 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 12:24:00,382 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 12:24:00,382 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 12:24:00,382 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 12:24:00,382 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 12:24:00,382 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_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1 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 -> d8ee33f278cd93a3b1e0d551730c6407889b70e338ebc3c857541220d9b0f75f [2024-12-02 12:24:00,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 12:24:00,668 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 12:24:00,670 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 12:24:00,672 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 12:24:00,672 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 12:24:00,673 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound10.c [2024-12-02 12:24:03,479 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/data/fc3c4ddd1/62cc9fdabb0c43e391eedd7ecdd53b6e/FLAG06b66a452 [2024-12-02 12:24:03,707 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 12:24:03,708 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound10.c [2024-12-02 12:24:03,716 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/data/fc3c4ddd1/62cc9fdabb0c43e391eedd7ecdd53b6e/FLAG06b66a452 [2024-12-02 12:24:04,071 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/data/fc3c4ddd1/62cc9fdabb0c43e391eedd7ecdd53b6e [2024-12-02 12:24:04,073 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 12:24:04,074 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 12:24:04,075 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 12:24:04,075 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 12:24:04,079 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 12:24:04,079 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:24:04" (1/1) ... [2024-12-02 12:24:04,080 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37e977cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:24:04, skipping insertion in model container [2024-12-02 12:24:04,080 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:24:04" (1/1) ... [2024-12-02 12:24:04,094 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 12:24:04,252 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_fe453d59-7004-4428-9812-585b96150019/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound10.c[597,610] [2024-12-02 12:24:04,273 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 12:24:04,282 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 12:24:04,294 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_fe453d59-7004-4428-9812-585b96150019/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound10.c[597,610] [2024-12-02 12:24:04,301 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 12:24:04,314 INFO L204 MainTranslator]: Completed translation [2024-12-02 12:24:04,314 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:24:04 WrapperNode [2024-12-02 12:24:04,314 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 12:24:04,315 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 12:24:04,315 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 12:24:04,316 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 12:24:04,322 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:24:04" (1/1) ... [2024-12-02 12:24:04,328 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:24:04" (1/1) ... [2024-12-02 12:24:04,341 INFO L138 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2024-12-02 12:24:04,342 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 12:24:04,342 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 12:24:04,342 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 12:24:04,342 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 12:24:04,349 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:24:04" (1/1) ... [2024-12-02 12:24:04,350 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:24:04" (1/1) ... [2024-12-02 12:24:04,351 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:24:04" (1/1) ... [2024-12-02 12:24:04,360 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]. [2024-12-02 12:24:04,360 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:24:04" (1/1) ... [2024-12-02 12:24:04,361 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:24:04" (1/1) ... [2024-12-02 12:24:04,363 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:24:04" (1/1) ... [2024-12-02 12:24:04,364 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:24:04" (1/1) ... [2024-12-02 12:24:04,368 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:24:04" (1/1) ... [2024-12-02 12:24:04,369 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:24:04" (1/1) ... [2024-12-02 12:24:04,369 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:24:04" (1/1) ... [2024-12-02 12:24:04,371 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 12:24:04,372 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 12:24:04,372 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 12:24:04,372 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 12:24:04,373 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:24:04" (1/1) ... [2024-12-02 12:24:04,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 12:24:04,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:24:04,402 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 12:24:04,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 12:24:04,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 12:24:04,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 12:24:04,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 12:24:04,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 12:24:04,428 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-12-02 12:24:04,428 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-12-02 12:24:04,487 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 12:24:04,489 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 12:24:04,621 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-12-02 12:24:04,621 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 12:24:04,629 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 12:24:04,630 INFO L312 CfgBuilder]: Removed 1 assume(true) statements. [2024-12-02 12:24:04,630 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:24:04 BoogieIcfgContainer [2024-12-02 12:24:04,630 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 12:24:04,632 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 12:24:04,632 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 12:24:04,635 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 12:24:04,636 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:24:04" (1/3) ... [2024-12-02 12:24:04,636 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3af5ac9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:24:04, skipping insertion in model container [2024-12-02 12:24:04,636 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:24:04" (2/3) ... [2024-12-02 12:24:04,636 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3af5ac9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:24:04, skipping insertion in model container [2024-12-02 12:24:04,636 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:24:04" (3/3) ... [2024-12-02 12:24:04,637 INFO L128 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound10.c [2024-12-02 12:24:04,652 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 12:24:04,654 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG bresenham-ll_unwindbound10.c that has 2 procedures, 21 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-12-02 12:24:04,709 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 12:24:04,723 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;@703c019e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 12:24:04,723 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-12-02 12:24:04,727 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 12:24:04,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-12-02 12:24:04,733 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:24:04,734 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:24:04,734 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:24:04,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:24:04,740 INFO L85 PathProgramCache]: Analyzing trace with hash 798370362, now seen corresponding path program 1 times [2024-12-02 12:24:04,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:24:04,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644507775] [2024-12-02 12:24:04,749 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:24:04,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:24:04,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:24:04,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:24:04,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:24:04,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644507775] [2024-12-02 12:24:04,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644507775] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:24:04,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:24:04,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 12:24:04,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418242035] [2024-12-02 12:24:04,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:24:04,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-12-02 12:24:04,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:24:04,899 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-12-02 12:24:04,900 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-12-02 12:24:04,902 INFO L87 Difference]: Start difference. First operand has 21 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:24:04,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:24:04,917 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2024-12-02 12:24:04,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-12-02 12:24:04,919 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-12-02 12:24:04,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:24:04,924 INFO L225 Difference]: With dead ends: 40 [2024-12-02 12:24:04,924 INFO L226 Difference]: Without dead ends: 17 [2024-12-02 12:24:04,926 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 [2024-12-02 12:24:04,928 INFO L435 NwaCegarLoop]: 24 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, 24 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 [2024-12-02 12:24:04,929 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 12:24:04,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-12-02 12:24:04,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-12-02 12:24:04,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-12-02 12:24:04,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2024-12-02 12:24:04,954 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 8 [2024-12-02 12:24:04,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:24:04,955 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2024-12-02 12:24:04,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:24:04,955 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2024-12-02 12:24:04,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-12-02 12:24:04,956 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:24:04,956 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:24:04,956 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 12:24:04,956 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:24:04,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:24:04,957 INFO L85 PathProgramCache]: Analyzing trace with hash 295298814, now seen corresponding path program 1 times [2024-12-02 12:24:04,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:24:04,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173881581] [2024-12-02 12:24:04,957 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:24:04,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:24:04,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-12-02 12:24:04,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1712864855] [2024-12-02 12:24:04,984 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:24:04,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:24:04,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:24:04,986 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:24:04,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 12:24:05,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:24:05,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-12-02 12:24:05,049 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:24:05,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:24:05,224 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 12:24:05,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:24:05,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173881581] [2024-12-02 12:24:05,225 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-12-02 12:24:05,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712864855] [2024-12-02 12:24:05,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712864855] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:24:05,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:24:05,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-12-02 12:24:05,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90558575] [2024-12-02 12:24:05,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:24:05,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 12:24:05,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:24:05,228 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 12:24:05,228 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-12-02 12:24:05,229 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:24:05,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:24:05,343 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2024-12-02 12:24:05,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 12:24:05,344 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-12-02 12:24:05,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:24:05,345 INFO L225 Difference]: With dead ends: 32 [2024-12-02 12:24:05,345 INFO L226 Difference]: Without dead ends: 30 [2024-12-02 12:24:05,345 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-12-02 12:24:05,346 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 12:24:05,346 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 52 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 12:24:05,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-12-02 12:24:05,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2024-12-02 12:24:05,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.263157894736842) internal successors, (24), 21 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 12:24:05,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2024-12-02 12:24:05,354 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 9 [2024-12-02 12:24:05,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:24:05,354 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2024-12-02 12:24:05,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:24:05,354 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2024-12-02 12:24:05,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-12-02 12:24:05,355 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:24:05,355 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:24:05,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 12:24:05,555 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:24:05,556 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:24:05,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:24:05,556 INFO L85 PathProgramCache]: Analyzing trace with hash 368316555, now seen corresponding path program 1 times [2024-12-02 12:24:05,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:24:05,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763565191] [2024-12-02 12:24:05,556 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:24:05,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:24:05,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:24:05,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:24:05,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:24:05,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763565191] [2024-12-02 12:24:05,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763565191] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:24:05,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:24:05,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 12:24:05,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396623340] [2024-12-02 12:24:05,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:24:05,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 12:24:05,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:24:05,648 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 12:24:05,648 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 12:24:05,648 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:24:05,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:24:05,663 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2024-12-02 12:24:05,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 12:24:05,664 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-12-02 12:24:05,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:24:05,666 INFO L225 Difference]: With dead ends: 33 [2024-12-02 12:24:05,666 INFO L226 Difference]: Without dead ends: 25 [2024-12-02 12:24:05,666 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 12:24:05,667 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 12:24:05,668 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 12:24:05,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-12-02 12:24:05,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-12-02 12:24:05,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 12:24:05,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2024-12-02 12:24:05,673 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 9 [2024-12-02 12:24:05,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:24:05,674 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2024-12-02 12:24:05,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:24:05,674 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2024-12-02 12:24:05,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-12-02 12:24:05,674 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:24:05,675 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:24:05,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-12-02 12:24:05,675 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:24:05,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:24:05,675 INFO L85 PathProgramCache]: Analyzing trace with hash -156697420, now seen corresponding path program 1 times [2024-12-02 12:24:05,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:24:05,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557249038] [2024-12-02 12:24:05,676 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:24:05,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:24:05,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-12-02 12:24:05,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2135845711] [2024-12-02 12:24:05,701 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:24:05,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:24:05,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:24:05,703 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:24:05,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 12:24:05,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:24:05,750 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-12-02 12:24:05,751 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:24:05,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:24:05,889 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 12:24:05,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:24:05,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557249038] [2024-12-02 12:24:05,889 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-12-02 12:24:05,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135845711] [2024-12-02 12:24:05,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135845711] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:24:05,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:24:05,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-12-02 12:24:05,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858090233] [2024-12-02 12:24:05,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:24:05,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 12:24:05,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:24:05,891 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 12:24:05,891 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-12-02 12:24:05,891 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-12-02 12:24:05,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:24:05,987 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2024-12-02 12:24:05,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 12:24:05,988 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-12-02 12:24:05,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:24:05,989 INFO L225 Difference]: With dead ends: 35 [2024-12-02 12:24:05,989 INFO L226 Difference]: Without dead ends: 27 [2024-12-02 12:24:05,989 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-12-02 12:24:05,990 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 12:24:05,990 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 52 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 12:24:05,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-12-02 12:24:05,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2024-12-02 12:24:05,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 12:24:05,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2024-12-02 12:24:05,996 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 16 [2024-12-02 12:24:05,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:24:05,996 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2024-12-02 12:24:05,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-12-02 12:24:05,997 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2024-12-02 12:24:05,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-12-02 12:24:05,997 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:24:05,997 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:24:06,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 12:24:06,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:24:06,198 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:24:06,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:24:06,199 INFO L85 PathProgramCache]: Analyzing trace with hash -716773380, now seen corresponding path program 1 times [2024-12-02 12:24:06,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:24:06,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132430244] [2024-12-02 12:24:06,199 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:24:06,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:24:06,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-12-02 12:24:06,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [490582342] [2024-12-02 12:24:06,226 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:24:06,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:24:06,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:24:06,228 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:24:06,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 12:24:06,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:24:06,273 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-12-02 12:24:06,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:24:06,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:24:06,464 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:24:06,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 12:24:06,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:24:06,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132430244] [2024-12-02 12:24:06,608 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-12-02 12:24:06,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490582342] [2024-12-02 12:24:06,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490582342] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:24:06,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 12:24:06,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2024-12-02 12:24:06,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231634108] [2024-12-02 12:24:06,609 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 12:24:06,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-12-02 12:24:06,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:24:06,610 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-12-02 12:24:06,610 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-12-02 12:24:06,610 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 12:24:06,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:24:06,846 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2024-12-02 12:24:06,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 12:24:06,847 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2024-12-02 12:24:06,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:24:06,848 INFO L225 Difference]: With dead ends: 44 [2024-12-02 12:24:06,848 INFO L226 Difference]: Without dead ends: 40 [2024-12-02 12:24:06,849 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-12-02 12:24:06,849 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 12:24:06,850 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 73 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 12:24:06,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-12-02 12:24:06,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2024-12-02 12:24:06,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 12:24:06,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2024-12-02 12:24:06,859 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2024-12-02 12:24:06,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:24:06,859 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2024-12-02 12:24:06,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 12:24:06,859 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2024-12-02 12:24:06,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-12-02 12:24:06,860 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:24:06,860 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:24:06,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-12-02 12:24:07,060 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:24:07,061 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:24:07,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:24:07,061 INFO L85 PathProgramCache]: Analyzing trace with hash -643755639, now seen corresponding path program 1 times [2024-12-02 12:24:07,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:24:07,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766382115] [2024-12-02 12:24:07,062 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:24:07,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:24:07,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:24:07,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:24:07,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:24:07,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766382115] [2024-12-02 12:24:07,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766382115] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:24:07,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265714520] [2024-12-02 12:24:07,166 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:24:07,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:24:07,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:24:07,169 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:24:07,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 12:24:07,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:24:07,214 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-12-02 12:24:07,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:24:07,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:24:07,246 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:24:07,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:24:07,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265714520] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:24:07,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:24:07,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2024-12-02 12:24:07,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814552724] [2024-12-02 12:24:07,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:24:07,293 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 12:24:07,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:24:07,293 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 12:24:07,294 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-12-02 12:24:07,294 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-12-02 12:24:07,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:24:07,366 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2024-12-02 12:24:07,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 12:24:07,367 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 3 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 20 [2024-12-02 12:24:07,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:24:07,368 INFO L225 Difference]: With dead ends: 72 [2024-12-02 12:24:07,368 INFO L226 Difference]: Without dead ends: 66 [2024-12-02 12:24:07,368 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-12-02 12:24:07,369 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 35 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 12:24:07,369 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 83 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 12:24:07,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-12-02 12:24:07,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2024-12-02 12:24:07,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 44 states have internal predecessors, (52), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-12-02 12:24:07,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2024-12-02 12:24:07,382 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 20 [2024-12-02 12:24:07,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:24:07,383 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2024-12-02 12:24:07,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-12-02 12:24:07,383 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2024-12-02 12:24:07,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-12-02 12:24:07,384 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:24:07,384 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:24:07,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 12:24:07,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-12-02 12:24:07,584 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:24:07,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:24:07,585 INFO L85 PathProgramCache]: Analyzing trace with hash 935756278, now seen corresponding path program 1 times [2024-12-02 12:24:07,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:24:07,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150299067] [2024-12-02 12:24:07,585 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:24:07,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:24:07,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-12-02 12:24:07,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [993506215] [2024-12-02 12:24:07,609 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:24:07,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:24:07,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:24:07,611 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:24:07,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 12:24:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:24:07,658 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-12-02 12:24:07,660 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:24:07,843 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 12:24:07,843 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:24:08,007 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 12:24:08,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:24:08,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150299067] [2024-12-02 12:24:08,007 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-12-02 12:24:08,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993506215] [2024-12-02 12:24:08,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993506215] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:24:08,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 12:24:08,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2024-12-02 12:24:08,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844034260] [2024-12-02 12:24:08,007 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 12:24:08,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-12-02 12:24:08,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:24:08,008 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-12-02 12:24:08,009 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2024-12-02 12:24:08,009 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 14 states, 10 states have (on average 2.5) internal successors, (25), 13 states have internal predecessors, (25), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-12-02 12:24:08,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:24:08,214 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2024-12-02 12:24:08,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 12:24:08,215 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 2.5) internal successors, (25), 13 states have internal predecessors, (25), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2024-12-02 12:24:08,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:24:08,216 INFO L225 Difference]: With dead ends: 86 [2024-12-02 12:24:08,216 INFO L226 Difference]: Without dead ends: 80 [2024-12-02 12:24:08,217 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2024-12-02 12:24:08,217 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 12:24:08,218 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 99 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 12:24:08,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-12-02 12:24:08,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2024-12-02 12:24:08,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 65 states have internal predecessors, (77), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-12-02 12:24:08,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2024-12-02 12:24:08,242 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 27 [2024-12-02 12:24:08,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:24:08,242 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2024-12-02 12:24:08,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 2.5) internal successors, (25), 13 states have internal predecessors, (25), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-12-02 12:24:08,243 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2024-12-02 12:24:08,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-12-02 12:24:08,244 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:24:08,244 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:24:08,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 12:24:08,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-12-02 12:24:08,445 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:24:08,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:24:08,445 INFO L85 PathProgramCache]: Analyzing trace with hash -85312076, now seen corresponding path program 1 times [2024-12-02 12:24:08,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:24:08,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092468995] [2024-12-02 12:24:08,446 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:24:08,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:24:08,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-12-02 12:24:08,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [20823483] [2024-12-02 12:24:08,465 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:24:08,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:24:08,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:24:08,468 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:24:08,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 12:24:08,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:24:08,518 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-12-02 12:24:08,520 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:24:08,792 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 12:24:08,792 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:24:09,105 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 12:24:09,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:24:09,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092468995] [2024-12-02 12:24:09,106 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-12-02 12:24:09,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20823483] [2024-12-02 12:24:09,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20823483] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:24:09,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 12:24:09,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2024-12-02 12:24:09,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641762869] [2024-12-02 12:24:09,106 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 12:24:09,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-12-02 12:24:09,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:24:09,107 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-12-02 12:24:09,108 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2024-12-02 12:24:09,108 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand has 22 states, 18 states have (on average 2.0) internal successors, (36), 19 states have internal predecessors, (36), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-12-02 12:24:09,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:24:09,784 INFO L93 Difference]: Finished difference Result 87 states and 100 transitions. [2024-12-02 12:24:09,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-12-02 12:24:09,785 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 2.0) internal successors, (36), 19 states have internal predecessors, (36), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 27 [2024-12-02 12:24:09,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:24:09,786 INFO L225 Difference]: With dead ends: 87 [2024-12-02 12:24:09,786 INFO L226 Difference]: Without dead ends: 79 [2024-12-02 12:24:09,787 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=231, Invalid=1029, Unknown=0, NotChecked=0, Total=1260 [2024-12-02 12:24:09,787 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 12:24:09,788 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 169 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 12:24:09,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-12-02 12:24:09,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 54. [2024-12-02 12:24:09,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-12-02 12:24:09,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2024-12-02 12:24:09,804 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 27 [2024-12-02 12:24:09,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:24:09,804 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2024-12-02 12:24:09,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 2.0) internal successors, (36), 19 states have internal predecessors, (36), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-12-02 12:24:09,804 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2024-12-02 12:24:09,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-12-02 12:24:09,805 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:24:09,805 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:24:09,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 12:24:10,006 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:24:10,006 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:24:10,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:24:10,007 INFO L85 PathProgramCache]: Analyzing trace with hash 380685067, now seen corresponding path program 2 times [2024-12-02 12:24:10,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:24:10,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389594694] [2024-12-02 12:24:10,007 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:24:10,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:24:10,029 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 12:24:10,029 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:24:10,276 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-12-02 12:24:10,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:24:10,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389594694] [2024-12-02 12:24:10,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389594694] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:24:10,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983643435] [2024-12-02 12:24:10,277 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:24:10,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:24:10,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:24:10,279 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:24:10,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 12:24:10,338 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 12:24:10,338 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:24:10,339 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-12-02 12:24:10,341 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:24:10,415 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:24:10,415 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:24:10,549 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-12-02 12:24:10,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983643435] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:24:10,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:24:10,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 15 [2024-12-02 12:24:10,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874511647] [2024-12-02 12:24:10,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:24:10,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-12-02 12:24:10,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:24:10,551 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-12-02 12:24:10,551 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2024-12-02 12:24:10,551 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2024-12-02 12:24:10,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:24:10,726 INFO L93 Difference]: Finished difference Result 126 states and 141 transitions. [2024-12-02 12:24:10,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-12-02 12:24:10,727 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) Word has length 53 [2024-12-02 12:24:10,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:24:10,728 INFO L225 Difference]: With dead ends: 126 [2024-12-02 12:24:10,728 INFO L226 Difference]: Without dead ends: 120 [2024-12-02 12:24:10,729 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2024-12-02 12:24:10,729 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 52 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 12:24:10,730 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 129 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 12:24:10,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-12-02 12:24:10,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2024-12-02 12:24:10,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 98 states have (on average 1.1122448979591837) internal successors, (109), 98 states have internal predecessors, (109), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-12-02 12:24:10,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 130 transitions. [2024-12-02 12:24:10,757 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 130 transitions. Word has length 53 [2024-12-02 12:24:10,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:24:10,757 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 130 transitions. [2024-12-02 12:24:10,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2024-12-02 12:24:10,758 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 130 transitions. [2024-12-02 12:24:10,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2024-12-02 12:24:10,760 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:24:10,760 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:24:10,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-12-02 12:24:10,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:24:10,961 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:24:10,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:24:10,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1638130997, now seen corresponding path program 3 times [2024-12-02 12:24:10,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:24:10,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735249206] [2024-12-02 12:24:10,962 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 12:24:10,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:24:11,079 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-12-02 12:24:11,079 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-12-02 12:24:11,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1202830176] [2024-12-02 12:24:11,082 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 12:24:11,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:24:11,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:24:11,084 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:24:11,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 12:24:11,148 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 12:24:11,148 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:24:11,149 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-12-02 12:24:11,153 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:24:11,406 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 102 proven. 1 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-12-02 12:24:11,406 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:24:11,642 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 46 proven. 57 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-12-02 12:24:11,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:24:11,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735249206] [2024-12-02 12:24:11,642 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-12-02 12:24:11,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202830176] [2024-12-02 12:24:11,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202830176] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:24:11,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 12:24:11,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2024-12-02 12:24:11,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830536794] [2024-12-02 12:24:11,643 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 12:24:11,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-12-02 12:24:11,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:24:11,644 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-12-02 12:24:11,644 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2024-12-02 12:24:11,644 INFO L87 Difference]: Start difference. First operand 120 states and 130 transitions. Second operand has 17 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 16 states have internal predecessors, (33), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-12-02 12:24:11,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:24:11,832 INFO L93 Difference]: Finished difference Result 228 states and 247 transitions. [2024-12-02 12:24:11,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 12:24:11,833 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 16 states have internal predecessors, (33), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 119 [2024-12-02 12:24:11,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:24:11,835 INFO L225 Difference]: With dead ends: 228 [2024-12-02 12:24:11,835 INFO L226 Difference]: Without dead ends: 222 [2024-12-02 12:24:11,836 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 218 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2024-12-02 12:24:11,836 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 12:24:11,837 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 85 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 12:24:11,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-12-02 12:24:11,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 219. [2024-12-02 12:24:11,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 179 states have (on average 1.111731843575419) internal successors, (199), 179 states have internal predecessors, (199), 20 states have call successors, (20), 20 states have call predecessors, (20), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2024-12-02 12:24:11,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 238 transitions. [2024-12-02 12:24:11,881 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 238 transitions. Word has length 119 [2024-12-02 12:24:11,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:24:11,881 INFO L471 AbstractCegarLoop]: Abstraction has 219 states and 238 transitions. [2024-12-02 12:24:11,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 16 states have internal predecessors, (33), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-12-02 12:24:11,881 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 238 transitions. [2024-12-02 12:24:11,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2024-12-02 12:24:11,883 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:24:11,883 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:24:11,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-12-02 12:24:12,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:24:12,084 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:24:12,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:24:12,085 INFO L85 PathProgramCache]: Analyzing trace with hash -958072627, now seen corresponding path program 1 times [2024-12-02 12:24:12,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:24:12,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724471812] [2024-12-02 12:24:12,085 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:24:12,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:24:12,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-12-02 12:24:12,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [427664889] [2024-12-02 12:24:12,127 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:24:12,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:24:12,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:24:12,129 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:24:12,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 12:24:12,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-12-02 12:24:12,227 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-12-02 12:24:12,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-12-02 12:24:12,327 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-12-02 12:24:12,327 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-12-02 12:24:12,328 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-12-02 12:24:12,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-12-02 12:24:12,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-12-02 12:24:12,533 INFO L422 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:24:12,581 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-12-02 12:24:12,583 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 12:24:12 BoogieIcfgContainer [2024-12-02 12:24:12,583 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-12-02 12:24:12,584 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-12-02 12:24:12,584 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-12-02 12:24:12,584 INFO L274 PluginConnector]: Witness Printer initialized [2024-12-02 12:24:12,585 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:24:04" (3/4) ... [2024-12-02 12:24:12,586 INFO L140 WitnessPrinter]: Generating witness for reachability counterexample [2024-12-02 12:24:12,643 INFO L129 tionWitnessGenerator]: Generated YAML witness of length 64. [2024-12-02 12:24:12,715 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/witness.graphml [2024-12-02 12:24:12,716 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/witness.yml [2024-12-02 12:24:12,716 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-12-02 12:24:12,716 INFO L158 Benchmark]: Toolchain (without parser) took 8642.67ms. Allocated memory is still 142.6MB. Free memory was 117.6MB in the beginning and 42.3MB in the end (delta: 75.2MB). Peak memory consumption was 71.1MB. Max. memory is 16.1GB. [2024-12-02 12:24:12,717 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 142.6MB. Free memory is still 83.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 12:24:12,717 INFO L158 Benchmark]: CACSL2BoogieTranslator took 239.92ms. Allocated memory is still 142.6MB. Free memory was 117.6MB in the beginning and 106.2MB in the end (delta: 11.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-12-02 12:24:12,717 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.27ms. Allocated memory is still 142.6MB. Free memory was 106.2MB in the beginning and 105.1MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 12:24:12,717 INFO L158 Benchmark]: Boogie Preprocessor took 29.15ms. Allocated memory is still 142.6MB. Free memory was 105.1MB in the beginning and 103.9MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 12:24:12,718 INFO L158 Benchmark]: RCFGBuilder took 258.14ms. Allocated memory is still 142.6MB. Free memory was 103.9MB in the beginning and 93.1MB in the end (delta: 10.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-12-02 12:24:12,718 INFO L158 Benchmark]: TraceAbstraction took 7951.83ms. Allocated memory is still 142.6MB. Free memory was 92.6MB in the beginning and 51.8MB in the end (delta: 40.8MB). Peak memory consumption was 45.9MB. Max. memory is 16.1GB. [2024-12-02 12:24:12,718 INFO L158 Benchmark]: Witness Printer took 131.71ms. Allocated memory is still 142.6MB. Free memory was 51.8MB in the beginning and 42.3MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-12-02 12:24:12,719 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 142.6MB. Free memory is still 83.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 239.92ms. Allocated memory is still 142.6MB. Free memory was 117.6MB in the beginning and 106.2MB in the end (delta: 11.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.27ms. Allocated memory is still 142.6MB. Free memory was 106.2MB in the beginning and 105.1MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 29.15ms. Allocated memory is still 142.6MB. Free memory was 105.1MB in the beginning and 103.9MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 258.14ms. Allocated memory is still 142.6MB. Free memory was 103.9MB in the beginning and 93.1MB in the end (delta: 10.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 7951.83ms. Allocated memory is still 142.6MB. Free memory was 92.6MB in the beginning and 51.8MB in the end (delta: 40.8MB). Peak memory consumption was 45.9MB. Max. memory is 16.1GB. * Witness Printer took 131.71ms. Allocated memory is still 142.6MB. Free memory was 51.8MB in the beginning and 42.3MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L21] int counter = 0; VAL [counter=0] [L23] int X, Y; [L24] long long x, y, v, xy, yx; [L25] X = __VERIFIER_nondet_int() [L26] Y = __VERIFIER_nondet_int() [L27] v = ((long long) 2 * Y) - X [L28] y = 0 [L29] x = 0 VAL [X=38, Y=2, counter=0, v=-34, x=0, y=0] [L31] EXPR counter++ VAL [X=38, Y=2, counter=1, v=-34, x=0, y=0] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y VAL [X=38, Y=2, counter=1, v=-34, x=0, xy=0, y=0, yx=0] [L34] CALL __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [\old(cond)=1, counter=1] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=1] [L34] RET __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [X=38, Y=2, counter=1, v=-34, x=0, xy=0, y=0, yx=0] [L35] COND FALSE !(!(x <= X)) VAL [X=38, Y=2, counter=1, v=-34, x=0, xy=0, y=0, yx=0] [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y VAL [X=38, Y=2, counter=1, v=-30, x=0, xy=0, y=0, yx=0] [L45] x++ VAL [X=38, Y=2, counter=1, v=-30, x=1, xy=0, y=0, yx=0] [L31] EXPR counter++ VAL [X=38, Y=2, counter=2, v=-30, x=1, xy=0, y=0, yx=0] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y VAL [X=38, Y=2, counter=2, v=-30, x=1, xy=0, y=0, yx=2] [L34] CALL __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [\old(cond)=1, counter=2] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=2] [L34] RET __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [X=38, Y=2, counter=2, v=-30, x=1, xy=0, y=0, yx=2] [L35] COND FALSE !(!(x <= X)) VAL [X=38, Y=2, counter=2, v=-30, x=1, xy=0, y=0, yx=2] [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y VAL [X=38, Y=2, counter=2, v=-26, x=1, xy=0, y=0, yx=2] [L45] x++ VAL [X=38, Y=2, counter=2, v=-26, x=2, xy=0, y=0, yx=2] [L31] EXPR counter++ VAL [X=38, Y=2, counter=3, v=-26, x=2, xy=0, y=0, yx=2] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y VAL [X=38, Y=2, counter=3, v=-26, x=2, xy=0, y=0, yx=4] [L34] CALL __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [\old(cond)=1, counter=3] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=3] [L34] RET __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [X=38, Y=2, counter=3, v=-26, x=2, xy=0, y=0, yx=4] [L35] COND FALSE !(!(x <= X)) VAL [X=38, Y=2, counter=3, v=-26, x=2, xy=0, y=0, yx=4] [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y VAL [X=38, Y=2, counter=3, v=-22, x=2, xy=0, y=0, yx=4] [L45] x++ VAL [X=38, Y=2, counter=3, v=-22, x=3, xy=0, y=0, yx=4] [L31] EXPR counter++ VAL [X=38, Y=2, counter=4, v=-22, x=3, xy=0, y=0, yx=4] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y VAL [X=38, Y=2, counter=4, v=-22, x=3, xy=0, y=0, yx=6] [L34] CALL __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [\old(cond)=1, counter=4] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=4] [L34] RET __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [X=38, Y=2, counter=4, v=-22, x=3, xy=0, y=0, yx=6] [L35] COND FALSE !(!(x <= X)) VAL [X=38, Y=2, counter=4, v=-22, x=3, xy=0, y=0, yx=6] [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y VAL [X=38, Y=2, counter=4, v=-18, x=3, xy=0, y=0, yx=6] [L45] x++ VAL [X=38, Y=2, counter=4, v=-18, x=4, xy=0, y=0, yx=6] [L31] EXPR counter++ VAL [X=38, Y=2, counter=5, v=-18, x=4, xy=0, y=0, yx=6] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y VAL [X=38, Y=2, counter=5, v=-18, x=4, xy=0, y=0, yx=8] [L34] CALL __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [\old(cond)=1, counter=5] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=5] [L34] RET __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [X=38, Y=2, counter=5, v=-18, x=4, xy=0, y=0, yx=8] [L35] COND FALSE !(!(x <= X)) VAL [X=38, Y=2, counter=5, v=-18, x=4, xy=0, y=0, yx=8] [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y VAL [X=38, Y=2, counter=5, v=-14, x=4, xy=0, y=0, yx=8] [L45] x++ VAL [X=38, Y=2, counter=5, v=-14, x=5, xy=0, y=0, yx=8] [L31] EXPR counter++ VAL [X=38, Y=2, counter=6, v=-14, x=5, xy=0, y=0, yx=8] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y VAL [X=38, Y=2, counter=6, v=-14, x=5, xy=0, y=0, yx=10] [L34] CALL __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [\old(cond)=1, counter=6] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=6] [L34] RET __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [X=38, Y=2, counter=6, v=-14, x=5, xy=0, y=0, yx=10] [L35] COND FALSE !(!(x <= X)) VAL [X=38, Y=2, counter=6, v=-14, x=5, xy=0, y=0, yx=10] [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y VAL [X=38, Y=2, counter=6, v=-10, x=5, xy=0, y=0, yx=10] [L45] x++ VAL [X=38, Y=2, counter=6, v=-10, x=6, xy=0, y=0, yx=10] [L31] EXPR counter++ VAL [X=38, Y=2, counter=7, v=-10, x=6, xy=0, y=0, yx=10] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y VAL [X=38, Y=2, counter=7, v=-10, x=6, xy=0, y=0, yx=12] [L34] CALL __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [\old(cond)=1, counter=7] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=7] [L34] RET __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [X=38, Y=2, counter=7, v=-10, x=6, xy=0, y=0, yx=12] [L35] COND FALSE !(!(x <= X)) VAL [X=38, Y=2, counter=7, v=-10, x=6, xy=0, y=0, yx=12] [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y VAL [X=38, Y=2, counter=7, v=-6, x=6, xy=0, y=0, yx=12] [L45] x++ VAL [X=38, Y=2, counter=7, v=-6, x=7, xy=0, y=0, yx=12] [L31] EXPR counter++ VAL [X=38, Y=2, counter=8, v=-6, x=7, xy=0, y=0, yx=12] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y VAL [X=38, Y=2, counter=8, v=-6, x=7, xy=0, y=0, yx=14] [L34] CALL __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [\old(cond)=1, counter=8] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=8] [L34] RET __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [X=38, Y=2, counter=8, v=-6, x=7, xy=0, y=0, yx=14] [L35] COND FALSE !(!(x <= X)) VAL [X=38, Y=2, counter=8, v=-6, x=7, xy=0, y=0, yx=14] [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y VAL [X=38, Y=2, counter=8, v=-2, x=7, xy=0, y=0, yx=14] [L45] x++ VAL [X=38, Y=2, counter=8, v=-2, x=8, xy=0, y=0, yx=14] [L31] EXPR counter++ VAL [X=38, Y=2, counter=9, v=-2, x=8, xy=0, y=0, yx=14] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y VAL [X=38, Y=2, counter=9, v=-2, x=8, xy=0, y=0, yx=16] [L34] CALL __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [\old(cond)=1, counter=9] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=9] [L34] RET __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [X=38, Y=2, counter=9, v=-2, x=8, xy=0, y=0, yx=16] [L35] COND FALSE !(!(x <= X)) VAL [X=38, Y=2, counter=9, v=-2, x=8, xy=0, y=0, yx=16] [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y VAL [X=38, Y=2, counter=9, v=2, x=8, xy=0, y=0, yx=16] [L45] x++ VAL [X=38, Y=2, counter=9, v=2, x=9, xy=0, y=0, yx=16] [L31] EXPR counter++ VAL [X=38, Y=2, counter=10, v=2, x=9, xy=0, y=0, yx=16] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y VAL [X=38, Y=2, counter=10, v=2, x=9, xy=0, y=0, yx=18] [L34] CALL __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [\old(cond)=1, counter=10] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=10] [L34] RET __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [X=38, Y=2, counter=10, v=2, x=9, xy=0, y=0, yx=18] [L35] COND FALSE !(!(x <= X)) VAL [X=38, Y=2, counter=10, v=2, x=9, xy=0, y=0, yx=18] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [X=38, Y=2, counter=10, v=-70, x=9, xy=0, y=1, yx=18] [L45] x++ VAL [X=38, Y=2, counter=10, v=-70, x=10, xy=0, y=1, yx=18] [L31] EXPR counter++ VAL [X=38, Y=2, counter=11, v=-70, x=10, xy=0, y=1, yx=18] [L31] COND FALSE !(counter++<10) [L47] xy = (long long) x*y [L48] yx = (long long) Y*x VAL [X=38, Y=2, counter=11, v=-70, xy=10, y=1, yx=20] [L49] CALL __VERIFIER_assert(2*yx - 2*xy - X + (long long) 2*Y - v + 2*y == 0) VAL [\old(cond)=0, counter=11] [L14] COND TRUE !(cond) VAL [\old(cond)=0, counter=11] [L16] reach_error() VAL [\old(cond)=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.8s, OverallIterations: 11, TraceHistogramMax: 11, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 186 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 184 mSDsluCounter, 816 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 671 mSDsCounter, 61 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 761 IncrementalHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 61 mSolverCounterUnsat, 145 mSDtfsCounter, 761 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 600 GetRequests, 467 SyntacticMatches, 10 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=219occurred in iteration=10, InterpolantAutomatonStates: 113, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 60 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 837 NumberOfCodeBlocks, 738 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 629 ConstructedInterpolants, 2 QuantifiedInterpolants, 2496 SizeOfPredicates, 29 NumberOfNonLiveVariables, 668 ConjunctsInSsa, 125 ConjunctsInUnsatCore, 18 InterpolantComputations, 4 PerfectInterpolantSequences, 1140/1394 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 proved your program to be incorrect! [2024-12-02 12:24:12,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe453d59-7004-4428-9812-585b96150019/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE