./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-new/count_by_nondet.i --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_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/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_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-new/count_by_nondet.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/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_c2ae5533-6cb8-412a-a5a9-314cc4702c90/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 3467a31f3cd19e731a18eaf7789079f202f3b29e437ef24ddd0458f09610424d --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 13:42:23,970 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 13:42:24,025 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-12-02 13:42:24,030 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 13:42:24,030 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 13:42:24,051 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 13:42:24,052 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 13:42:24,052 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 13:42:24,052 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 13:42:24,052 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 13:42:24,052 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 13:42:24,052 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 13:42:24,053 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 13:42:24,053 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 13:42:24,053 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 13:42:24,053 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 13:42:24,053 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-12-02 13:42:24,053 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 13:42:24,053 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 13:42:24,053 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 13:42:24,053 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 13:42:24,054 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-12-02 13:42:24,054 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 13:42:24,054 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-12-02 13:42:24,054 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 13:42:24,054 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-12-02 13:42:24,054 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 13:42:24,054 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 13:42:24,054 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 13:42:24,054 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 13:42:24,054 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 13:42:24,054 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 13:42:24,055 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 13:42:24,055 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 13:42:24,055 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 13:42:24,055 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 13:42:24,055 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 13:42:24,055 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 13:42:24,055 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 13:42:24,055 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 13:42:24,055 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-12-02 13:42:24,056 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-12-02 13:42:24,056 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 13:42:24,056 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 13:42:24,056 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 13:42:24,056 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 13:42:24,056 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 13:42:24,056 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 13:42:24,056 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_c2ae5533-6cb8-412a-a5a9-314cc4702c90/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 -> 3467a31f3cd19e731a18eaf7789079f202f3b29e437ef24ddd0458f09610424d [2024-12-02 13:42:24,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 13:42:24,268 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 13:42:24,270 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 13:42:24,271 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 13:42:24,271 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 13:42:24,273 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/loop-new/count_by_nondet.i [2024-12-02 13:42:26,989 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/data/c106a0c11/5890f9a5b633439ead2b3dedc61b039c/FLAGfb491a72d [2024-12-02 13:42:27,191 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 13:42:27,192 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/sv-benchmarks/c/loop-new/count_by_nondet.i [2024-12-02 13:42:27,203 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/data/c106a0c11/5890f9a5b633439ead2b3dedc61b039c/FLAGfb491a72d [2024-12-02 13:42:27,229 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/data/c106a0c11/5890f9a5b633439ead2b3dedc61b039c [2024-12-02 13:42:27,233 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 13:42:27,234 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 13:42:27,236 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 13:42:27,236 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 13:42:27,241 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 13:42:27,241 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:42:27" (1/1) ... [2024-12-02 13:42:27,242 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@214fd10d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:27, skipping insertion in model container [2024-12-02 13:42:27,243 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:42:27" (1/1) ... [2024-12-02 13:42:27,257 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 13:42:27,392 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_c2ae5533-6cb8-412a-a5a9-314cc4702c90/sv-benchmarks/c/loop-new/count_by_nondet.i[891,904] [2024-12-02 13:42:27,404 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 13:42:27,412 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 13:42:27,422 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_c2ae5533-6cb8-412a-a5a9-314cc4702c90/sv-benchmarks/c/loop-new/count_by_nondet.i[891,904] [2024-12-02 13:42:27,425 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 13:42:27,438 INFO L204 MainTranslator]: Completed translation [2024-12-02 13:42:27,438 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:27 WrapperNode [2024-12-02 13:42:27,438 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 13:42:27,439 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 13:42:27,439 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 13:42:27,439 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 13:42:27,446 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:27" (1/1) ... [2024-12-02 13:42:27,451 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:27" (1/1) ... [2024-12-02 13:42:27,464 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2024-12-02 13:42:27,465 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 13:42:27,465 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 13:42:27,465 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 13:42:27,465 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 13:42:27,473 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:27" (1/1) ... [2024-12-02 13:42:27,473 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:27" (1/1) ... [2024-12-02 13:42:27,474 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:27" (1/1) ... [2024-12-02 13:42:27,484 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 13:42:27,484 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:27" (1/1) ... [2024-12-02 13:42:27,484 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:27" (1/1) ... [2024-12-02 13:42:27,486 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:27" (1/1) ... [2024-12-02 13:42:27,487 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:27" (1/1) ... [2024-12-02 13:42:27,490 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:27" (1/1) ... [2024-12-02 13:42:27,491 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:27" (1/1) ... [2024-12-02 13:42:27,491 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:27" (1/1) ... [2024-12-02 13:42:27,493 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 13:42:27,493 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 13:42:27,494 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 13:42:27,494 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 13:42:27,495 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:27" (1/1) ... [2024-12-02 13:42:27,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 13:42:27,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:42:27,523 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 13:42:27,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 13:42:27,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 13:42:27,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 13:42:27,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 13:42:27,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 13:42:27,597 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 13:42:27,599 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 13:42:27,671 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-12-02 13:42:27,672 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 13:42:27,679 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 13:42:27,679 INFO L312 CfgBuilder]: Removed 1 assume(true) statements. [2024-12-02 13:42:27,680 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:42:27 BoogieIcfgContainer [2024-12-02 13:42:27,680 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 13:42:27,682 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 13:42:27,682 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 13:42:27,687 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 13:42:27,687 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:42:27" (1/3) ... [2024-12-02 13:42:27,687 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b21f758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:42:27, skipping insertion in model container [2024-12-02 13:42:27,687 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:27" (2/3) ... [2024-12-02 13:42:27,688 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b21f758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:42:27, skipping insertion in model container [2024-12-02 13:42:27,688 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:42:27" (3/3) ... [2024-12-02 13:42:27,689 INFO L128 eAbstractionObserver]: Analyzing ICFG count_by_nondet.i [2024-12-02 13:42:27,704 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 13:42:27,706 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG count_by_nondet.i that has 1 procedures, 13 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-12-02 13:42:27,753 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 13:42:27,765 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;@2d501460, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 13:42:27,765 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-12-02 13:42:27,769 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:42:27,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-12-02 13:42:27,774 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 13:42:27,774 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-12-02 13:42:27,775 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 13:42:27,778 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:42:27,778 INFO L85 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2024-12-02 13:42:27,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:42:27,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490220863] [2024-12-02 13:42:27,784 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:42:27,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:42:27,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:42:27,879 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 13:42:27,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:42:27,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490220863] [2024-12-02 13:42:27,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490220863] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:42:27,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:42:27,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 13:42:27,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987708062] [2024-12-02 13:42:27,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:42:27,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-12-02 13:42:27,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:42:27,904 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-12-02 13:42:27,904 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-12-02 13:42:27,906 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:42:27,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 13:42:27,917 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2024-12-02 13:42:27,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-12-02 13:42:27,919 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-12-02 13:42:27,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 13:42:27,925 INFO L225 Difference]: With dead ends: 21 [2024-12-02 13:42:27,925 INFO L226 Difference]: Without dead ends: 9 [2024-12-02 13:42:27,928 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 13:42:27,931 INFO L435 NwaCegarLoop]: 14 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, 14 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 13:42:27,932 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 13:42:27,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2024-12-02 13:42:27,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2024-12-02 13:42:27,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:42:27,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2024-12-02 13:42:27,953 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2024-12-02 13:42:27,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 13:42:27,954 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2024-12-02 13:42:27,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:42:27,954 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2024-12-02 13:42:27,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-12-02 13:42:27,954 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 13:42:27,954 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-12-02 13:42:27,955 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 13:42:27,955 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 13:42:27,956 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:42:27,956 INFO L85 PathProgramCache]: Analyzing trace with hash 889669584, now seen corresponding path program 1 times [2024-12-02 13:42:27,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:42:27,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361193156] [2024-12-02 13:42:27,956 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:42:27,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:42:27,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:42:28,012 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 13:42:28,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:42:28,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361193156] [2024-12-02 13:42:28,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361193156] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:42:28,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:42:28,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 13:42:28,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121686730] [2024-12-02 13:42:28,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:42:28,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 13:42:28,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:42:28,014 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 13:42:28,014 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 13:42:28,014 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:42:28,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 13:42:28,029 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2024-12-02 13:42:28,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 13:42:28,030 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-12-02 13:42:28,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 13:42:28,030 INFO L225 Difference]: With dead ends: 16 [2024-12-02 13:42:28,030 INFO L226 Difference]: Without dead ends: 12 [2024-12-02 13:42:28,030 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 13:42:28,031 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 13:42:28,031 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 12 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 13:42:28,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-12-02 13:42:28,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2024-12-02 13:42:28,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:42:28,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2024-12-02 13:42:28,035 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 6 [2024-12-02 13:42:28,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 13:42:28,035 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2024-12-02 13:42:28,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:42:28,035 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2024-12-02 13:42:28,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-12-02 13:42:28,035 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 13:42:28,035 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:42:28,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 13:42:28,036 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 13:42:28,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:42:28,036 INFO L85 PathProgramCache]: Analyzing trace with hash -2136196745, now seen corresponding path program 1 times [2024-12-02 13:42:28,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:42:28,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078804291] [2024-12-02 13:42:28,036 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:42:28,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:42:28,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:42:28,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:42:28,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:42:28,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078804291] [2024-12-02 13:42:28,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078804291] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:42:28,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858524206] [2024-12-02 13:42:28,111 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:42:28,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:42:28,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:42:28,114 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:42:28,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 13:42:28,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:42:28,156 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 13:42:28,160 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:42:28,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:42:28,203 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:42:28,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:42:28,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858524206] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:42:28,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:42:28,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2024-12-02 13:42:28,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887515554] [2024-12-02 13:42:28,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:42:28,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 13:42:28,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:42:28,235 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 13:42:28,235 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-12-02 13:42:28,235 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:42:28,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 13:42:28,254 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2024-12-02 13:42:28,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 13:42:28,254 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-12-02 13:42:28,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 13:42:28,255 INFO L225 Difference]: With dead ends: 17 [2024-12-02 13:42:28,255 INFO L226 Difference]: Without dead ends: 13 [2024-12-02 13:42:28,255 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-12-02 13:42:28,256 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 13:42:28,256 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 13 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 13:42:28,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-12-02 13:42:28,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-12-02 13:42:28,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:42:28,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2024-12-02 13:42:28,259 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 9 [2024-12-02 13:42:28,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 13:42:28,259 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2024-12-02 13:42:28,259 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:42:28,260 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2024-12-02 13:42:28,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-12-02 13:42:28,260 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 13:42:28,260 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-12-02 13:42:28,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 13:42:28,462 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:42:28,462 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 13:42:28,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:42:28,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1348571760, now seen corresponding path program 2 times [2024-12-02 13:42:28,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:42:28,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100606547] [2024-12-02 13:42:28,463 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 13:42:28,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:42:28,475 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 13:42:28,475 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:42:28,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:42:28,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:42:28,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100606547] [2024-12-02 13:42:28,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100606547] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:42:28,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902113669] [2024-12-02 13:42:28,598 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 13:42:28,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:42:28,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:42:28,600 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:42:28,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 13:42:28,636 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 13:42:28,636 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:42:28,637 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-02 13:42:28,638 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:42:28,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:42:28,679 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:42:28,747 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:42:28,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902113669] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:42:28,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:42:28,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-12-02 13:42:28,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107051848] [2024-12-02 13:42:28,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:42:28,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-12-02 13:42:28,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:42:28,748 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-12-02 13:42:28,749 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-12-02 13:42:28,749 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:42:28,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 13:42:28,777 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2024-12-02 13:42:28,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 13:42:28,777 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-12-02 13:42:28,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 13:42:28,777 INFO L225 Difference]: With dead ends: 34 [2024-12-02 13:42:28,778 INFO L226 Difference]: Without dead ends: 27 [2024-12-02 13:42:28,778 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-12-02 13:42:28,779 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 13:42:28,779 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 45 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 13:42:28,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-12-02 13:42:28,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2024-12-02 13:42:28,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:42:28,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2024-12-02 13:42:28,783 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 12 [2024-12-02 13:42:28,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 13:42:28,783 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2024-12-02 13:42:28,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:42:28,784 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2024-12-02 13:42:28,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-12-02 13:42:28,784 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 13:42:28,784 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1] [2024-12-02 13:42:28,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 13:42:28,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:42:28,985 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 13:42:28,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:42:28,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1935720368, now seen corresponding path program 3 times [2024-12-02 13:42:28,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:42:28,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202760579] [2024-12-02 13:42:28,985 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 13:42:28,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:42:29,000 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-12-02 13:42:29,000 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:42:29,170 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:42:29,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:42:29,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202760579] [2024-12-02 13:42:29,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202760579] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:42:29,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955641381] [2024-12-02 13:42:29,171 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 13:42:29,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:42:29,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:42:29,173 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:42:29,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 13:42:29,219 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-12-02 13:42:29,219 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:42:29,220 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-12-02 13:42:29,226 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:42:29,287 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:42:29,287 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:42:29,431 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:42:29,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955641381] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:42:29,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:42:29,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2024-12-02 13:42:29,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656761344] [2024-12-02 13:42:29,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:42:29,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-12-02 13:42:29,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:42:29,432 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-12-02 13:42:29,432 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2024-12-02 13:42:29,433 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:42:29,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 13:42:29,466 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2024-12-02 13:42:29,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-12-02 13:42:29,467 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-12-02 13:42:29,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 13:42:29,468 INFO L225 Difference]: With dead ends: 62 [2024-12-02 13:42:29,468 INFO L226 Difference]: Without dead ends: 51 [2024-12-02 13:42:29,468 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2024-12-02 13:42:29,469 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 14 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 13:42:29,469 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 63 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 13:42:29,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-12-02 13:42:29,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2024-12-02 13:42:29,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:42:29,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2024-12-02 13:42:29,475 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 24 [2024-12-02 13:42:29,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 13:42:29,475 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2024-12-02 13:42:29,476 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:42:29,476 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2024-12-02 13:42:29,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-12-02 13:42:29,476 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 13:42:29,476 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1] [2024-12-02 13:42:29,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 13:42:29,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:42:29,677 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 13:42:29,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:42:29,677 INFO L85 PathProgramCache]: Analyzing trace with hash 409041456, now seen corresponding path program 4 times [2024-12-02 13:42:29,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:42:29,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919178977] [2024-12-02 13:42:29,678 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 13:42:29,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:42:29,703 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 13:42:29,703 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:42:30,036 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:42:30,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:42:30,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919178977] [2024-12-02 13:42:30,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919178977] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:42:30,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104194627] [2024-12-02 13:42:30,036 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 13:42:30,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:42:30,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:42:30,039 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:42:30,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 13:42:30,099 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 13:42:30,099 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:42:30,100 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-12-02 13:42:30,103 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:42:30,200 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:42:30,200 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:42:30,654 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:42:30,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104194627] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:42:30,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:42:30,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 33 [2024-12-02 13:42:30,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444204125] [2024-12-02 13:42:30,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:42:30,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-12-02 13:42:30,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:42:30,656 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-12-02 13:42:30,657 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2024-12-02 13:42:30,657 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 33 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 33 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:42:30,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 13:42:30,731 INFO L93 Difference]: Finished difference Result 118 states and 133 transitions. [2024-12-02 13:42:30,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-12-02 13:42:30,732 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 33 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2024-12-02 13:42:30,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 13:42:30,733 INFO L225 Difference]: With dead ends: 118 [2024-12-02 13:42:30,733 INFO L226 Difference]: Without dead ends: 99 [2024-12-02 13:42:30,734 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2024-12-02 13:42:30,735 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 34 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 13:42:30,735 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 111 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 13:42:30,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-12-02 13:42:30,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2024-12-02 13:42:30,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:42:30,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2024-12-02 13:42:30,745 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 48 [2024-12-02 13:42:30,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 13:42:30,745 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2024-12-02 13:42:30,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 33 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:42:30,746 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2024-12-02 13:42:30,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-12-02 13:42:30,748 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 13:42:30,748 INFO L218 NwaCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1] [2024-12-02 13:42:30,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 13:42:30,948 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-12-02 13:42:30,948 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 13:42:30,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:42:30,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1361866544, now seen corresponding path program 5 times [2024-12-02 13:42:30,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:42:30,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113545842] [2024-12-02 13:42:30,949 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 13:42:30,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:42:31,013 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2024-12-02 13:42:31,014 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:42:31,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:42:31,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:42:31,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113545842] [2024-12-02 13:42:31,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113545842] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:42:31,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644177741] [2024-12-02 13:42:31,954 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 13:42:31,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:42:31,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:42:31,956 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:42:31,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 13:42:32,053 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2024-12-02 13:42:32,053 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:42:32,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-12-02 13:42:32,057 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:42:32,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:42:32,224 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:42:33,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:42:33,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644177741] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:42:33,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:42:33,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 66 [2024-12-02 13:42:33,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521993761] [2024-12-02 13:42:33,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:42:33,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-12-02 13:42:33,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:42:33,405 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-12-02 13:42:33,406 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=2021, Invalid=2269, Unknown=0, NotChecked=0, Total=4290 [2024-12-02 13:42:33,406 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand has 66 states, 66 states have (on average 2.893939393939394) internal successors, (191), 66 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:42:33,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 13:42:33,534 INFO L93 Difference]: Finished difference Result 230 states and 261 transitions. [2024-12-02 13:42:33,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-12-02 13:42:33,535 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.893939393939394) internal successors, (191), 66 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2024-12-02 13:42:33,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 13:42:33,536 INFO L225 Difference]: With dead ends: 230 [2024-12-02 13:42:33,536 INFO L226 Difference]: Without dead ends: 195 [2024-12-02 13:42:33,538 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2021, Invalid=2269, Unknown=0, NotChecked=0, Total=4290 [2024-12-02 13:42:33,539 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 93 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 13:42:33,539 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 193 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 13:42:33,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2024-12-02 13:42:33,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 193. [2024-12-02 13:42:33,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.0052083333333333) internal successors, (193), 192 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:42:33,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2024-12-02 13:42:33,553 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 96 [2024-12-02 13:42:33,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 13:42:33,554 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2024-12-02 13:42:33,554 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.893939393939394) internal successors, (191), 66 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:42:33,554 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2024-12-02 13:42:33,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2024-12-02 13:42:33,556 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 13:42:33,556 INFO L218 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1] [2024-12-02 13:42:33,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 13:42:33,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:42:33,757 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 13:42:33,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:42:33,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1407736112, now seen corresponding path program 6 times [2024-12-02 13:42:33,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:42:33,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801326504] [2024-12-02 13:42:33,758 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 13:42:33,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:42:33,875 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 63 check-sat command(s) [2024-12-02 13:42:33,875 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:42:36,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:42:36,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:42:36,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801326504] [2024-12-02 13:42:36,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801326504] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:42:36,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951482953] [2024-12-02 13:42:36,341 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 13:42:36,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:42:36,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:42:36,342 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:42:36,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 13:42:36,521 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 63 check-sat command(s) [2024-12-02 13:42:36,521 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:42:36,525 INFO L256 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-12-02 13:42:36,530 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:42:36,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:42:36,807 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:42:40,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:42:40,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951482953] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:42:40,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:42:40,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 131 [2024-12-02 13:42:40,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355384553] [2024-12-02 13:42:40,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:42:40,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2024-12-02 13:42:40,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:42:40,898 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2024-12-02 13:42:40,901 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8261, Invalid=8769, Unknown=0, NotChecked=0, Total=17030 [2024-12-02 13:42:40,902 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand has 131 states, 131 states have (on average 2.954198473282443) internal successors, (387), 131 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:42:41,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 13:42:41,307 INFO L93 Difference]: Finished difference Result 454 states and 517 transitions. [2024-12-02 13:42:41,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2024-12-02 13:42:41,308 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.954198473282443) internal successors, (387), 131 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2024-12-02 13:42:41,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 13:42:41,310 INFO L225 Difference]: With dead ends: 454 [2024-12-02 13:42:41,310 INFO L226 Difference]: Without dead ends: 387 [2024-12-02 13:42:41,313 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 318 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=8261, Invalid=8769, Unknown=0, NotChecked=0, Total=17030 [2024-12-02 13:42:41,314 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 215 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 13:42:41,314 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 351 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 13:42:41,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2024-12-02 13:42:41,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 385. [2024-12-02 13:42:41,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.0026041666666667) internal successors, (385), 384 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:42:41,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 385 transitions. [2024-12-02 13:42:41,335 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 385 transitions. Word has length 192 [2024-12-02 13:42:41,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 13:42:41,336 INFO L471 AbstractCegarLoop]: Abstraction has 385 states and 385 transitions. [2024-12-02 13:42:41,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.954198473282443) internal successors, (387), 131 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:42:41,336 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 385 transitions. [2024-12-02 13:42:41,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2024-12-02 13:42:41,343 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 13:42:41,343 INFO L218 NwaCegarLoop]: trace histogram [126, 126, 126, 1, 1, 1, 1, 1, 1] [2024-12-02 13:42:41,351 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 13:42:41,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:42:41,544 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 13:42:41,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:42:41,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1308110128, now seen corresponding path program 7 times [2024-12-02 13:42:41,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:42:41,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521621718] [2024-12-02 13:42:41,545 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 13:42:41,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:42:41,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:42:49,634 INFO L134 CoverageAnalysis]: Checked inductivity of 23751 backedges. 0 proven. 23751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:42:49,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:42:49,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521621718] [2024-12-02 13:42:49,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521621718] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:42:49,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626077709] [2024-12-02 13:42:49,634 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 13:42:49,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:42:49,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:42:49,636 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:42:49,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 13:42:49,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:42:49,824 INFO L256 TraceCheckSpWp]: Trace formula consists of 1163 conjuncts, 130 conjuncts are in the unsatisfiable core [2024-12-02 13:42:49,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:42:50,285 INFO L134 CoverageAnalysis]: Checked inductivity of 23751 backedges. 0 proven. 23751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:42:50,285 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:43:05,329 INFO L134 CoverageAnalysis]: Checked inductivity of 23751 backedges. 0 proven. 23751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:43:05,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626077709] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:43:05,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:43:05,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 130, 130] total 259 [2024-12-02 13:43:05,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450326427] [2024-12-02 13:43:05,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:43:05,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 259 states [2024-12-02 13:43:05,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:43:05,339 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 259 interpolants. [2024-12-02 13:43:05,344 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32901, Invalid=33921, Unknown=0, NotChecked=0, Total=66822 [2024-12-02 13:43:05,344 INFO L87 Difference]: Start difference. First operand 385 states and 385 transitions. Second operand has 259 states, 259 states have (on average 2.976833976833977) internal successors, (771), 259 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:43:07,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 13:43:07,697 INFO L93 Difference]: Finished difference Result 902 states and 1029 transitions. [2024-12-02 13:43:07,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2024-12-02 13:43:07,698 INFO L78 Accepts]: Start accepts. Automaton has has 259 states, 259 states have (on average 2.976833976833977) internal successors, (771), 259 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 384 [2024-12-02 13:43:07,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 13:43:07,700 INFO L225 Difference]: With dead ends: 902 [2024-12-02 13:43:07,700 INFO L226 Difference]: Without dead ends: 771 [2024-12-02 13:43:07,703 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 896 GetRequests, 638 SyntacticMatches, 1 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=32901, Invalid=33921, Unknown=0, NotChecked=0, Total=66822 [2024-12-02 13:43:07,703 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 549 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 13:43:07,704 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 679 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 13:43:07,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2024-12-02 13:43:07,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 769. [2024-12-02 13:43:07,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 768 states have (on average 1.0013020833333333) internal successors, (769), 768 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:43:07,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 769 transitions. [2024-12-02 13:43:07,718 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 769 transitions. Word has length 384 [2024-12-02 13:43:07,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 13:43:07,718 INFO L471 AbstractCegarLoop]: Abstraction has 769 states and 769 transitions. [2024-12-02 13:43:07,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 259 states, 259 states have (on average 2.976833976833977) internal successors, (771), 259 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:43:07,719 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 769 transitions. [2024-12-02 13:43:07,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 769 [2024-12-02 13:43:07,732 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 13:43:07,732 INFO L218 NwaCegarLoop]: trace histogram [254, 254, 254, 1, 1, 1, 1, 1, 1] [2024-12-02 13:43:07,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 13:43:07,932 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:43:07,933 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 13:43:07,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:43:07,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1804085968, now seen corresponding path program 8 times [2024-12-02 13:43:07,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:43:07,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680499062] [2024-12-02 13:43:07,934 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 13:43:07,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:43:08,364 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 13:43:08,365 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:43:45,063 INFO L134 CoverageAnalysis]: Checked inductivity of 96647 backedges. 0 proven. 96647 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:43:45,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:43:45,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680499062] [2024-12-02 13:43:45,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680499062] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:43:45,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402830711] [2024-12-02 13:43:45,063 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 13:43:45,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:43:45,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:43:45,065 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:43:45,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 13:43:45,408 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 13:43:45,408 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:43:45,419 INFO L256 TraceCheckSpWp]: Trace formula consists of 2315 conjuncts, 258 conjuncts are in the unsatisfiable core [2024-12-02 13:43:45,431 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:43:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 96647 backedges. 0 proven. 96647 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:43:46,222 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:44:46,879 INFO L134 CoverageAnalysis]: Checked inductivity of 96647 backedges. 0 proven. 96647 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:44:46,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402830711] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:44:46,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:44:46,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [258, 258, 258] total 515 [2024-12-02 13:44:46,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297454992] [2024-12-02 13:44:46,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:44:46,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 515 states [2024-12-02 13:44:46,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:44:46,907 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 515 interpolants. [2024-12-02 13:44:46,918 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131333, Invalid=133377, Unknown=0, NotChecked=0, Total=264710 [2024-12-02 13:44:46,919 INFO L87 Difference]: Start difference. First operand 769 states and 769 transitions. Second operand has 515 states, 515 states have (on average 2.9883495145631067) internal successors, (1539), 515 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:45:10,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 13:45:10,342 INFO L93 Difference]: Finished difference Result 1798 states and 2053 transitions. [2024-12-02 13:45:10,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 513 states. [2024-12-02 13:45:10,344 INFO L78 Accepts]: Start accepts. Automaton has has 515 states, 515 states have (on average 2.9883495145631067) internal successors, (1539), 515 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 768 [2024-12-02 13:45:10,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 13:45:10,349 INFO L225 Difference]: With dead ends: 1798 [2024-12-02 13:45:10,349 INFO L226 Difference]: Without dead ends: 1539 [2024-12-02 13:45:10,356 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1792 GetRequests, 1278 SyntacticMatches, 1 SemanticMatches, 513 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 79.8s TimeCoverageRelationStatistics Valid=131333, Invalid=133377, Unknown=0, NotChecked=0, Total=264710 [2024-12-02 13:45:10,357 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 1399 mSDsluCounter, 1314 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1399 SdHoareTripleChecker+Valid, 1321 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-12-02 13:45:10,357 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1399 Valid, 1321 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-12-02 13:45:10,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2024-12-02 13:45:10,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 1537. [2024-12-02 13:45:10,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1536 states have (on average 1.0006510416666667) internal successors, (1537), 1536 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:45:10,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 1537 transitions. [2024-12-02 13:45:10,383 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 1537 transitions. Word has length 768 [2024-12-02 13:45:10,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 13:45:10,384 INFO L471 AbstractCegarLoop]: Abstraction has 1537 states and 1537 transitions. [2024-12-02 13:45:10,384 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 515 states, 515 states have (on average 2.9883495145631067) internal successors, (1539), 515 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:45:10,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 1537 transitions. [2024-12-02 13:45:10,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1537 [2024-12-02 13:45:10,395 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 13:45:10,395 INFO L218 NwaCegarLoop]: trace histogram [510, 510, 510, 1, 1, 1, 1, 1, 1] [2024-12-02 13:45:10,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-12-02 13:45:10,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-12-02 13:45:10,596 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 13:45:10,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:45:10,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1794581808, now seen corresponding path program 9 times [2024-12-02 13:45:10,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:45:10,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645617450] [2024-12-02 13:45:10,597 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 13:45:10,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:45:17,425 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 511 check-sat command(s) [2024-12-02 13:45:17,426 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:48:31,853 INFO L134 CoverageAnalysis]: Checked inductivity of 389895 backedges. 0 proven. 389895 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:48:31,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:48:31,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645617450] [2024-12-02 13:48:31,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645617450] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:48:31,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194107906] [2024-12-02 13:48:31,854 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 13:48:31,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:48:31,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:48:31,856 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:48:31,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ae5533-6cb8-412a-a5a9-314cc4702c90/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 13:48:36,051 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 511 check-sat command(s) [2024-12-02 13:48:36,051 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:48:36,096 INFO L256 TraceCheckSpWp]: Trace formula consists of 4619 conjuncts, 514 conjuncts are in the unsatisfiable core [2024-12-02 13:48:36,119 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:48:37,689 INFO L134 CoverageAnalysis]: Checked inductivity of 389895 backedges. 0 proven. 389895 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:48:37,689 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:52:52,359 INFO L134 CoverageAnalysis]: Checked inductivity of 389895 backedges. 0 proven. 389895 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:52:52,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194107906] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:52:52,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:52:52,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [514, 514, 514] total 1027 [2024-12-02 13:52:52,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108522443] [2024-12-02 13:52:52,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:52:52,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 1027 states [2024-12-02 13:52:52,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:52:52,420 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 1027 interpolants. [2024-12-02 13:52:52,446 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=524805, Invalid=528897, Unknown=0, NotChecked=0, Total=1053702 [2024-12-02 13:52:52,447 INFO L87 Difference]: Start difference. First operand 1537 states and 1537 transitions. Second operand has 1027 states, 1027 states have (on average 2.994157740993184) internal successors, (3075), 1027 states have internal predecessors, (3075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)