./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_25-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/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_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_25-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/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_fbed6b39-cc91-4960-b0de-56db5509787e/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 1a779a25b3e5147f7c14d79ede7be3f2d2de62e2de15b88047fe2a162a63a762 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 14:36:41,310 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 14:36:41,364 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-12-02 14:36:41,368 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 14:36:41,368 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 14:36:41,391 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 14:36:41,391 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 14:36:41,392 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 14:36:41,392 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 14:36:41,392 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 14:36:41,392 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 14:36:41,392 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 14:36:41,393 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 14:36:41,393 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 14:36:41,393 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 14:36:41,393 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 14:36:41,393 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-12-02 14:36:41,393 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 14:36:41,393 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 14:36:41,393 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 14:36:41,393 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 14:36:41,393 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-12-02 14:36:41,394 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 14:36:41,394 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-12-02 14:36:41,394 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 14:36:41,394 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-12-02 14:36:41,394 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 14:36:41,394 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 14:36:41,394 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 14:36:41,394 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 14:36:41,394 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 14:36:41,395 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 14:36:41,395 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 14:36:41,395 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 14:36:41,395 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 14:36:41,395 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 14:36:41,395 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 14:36:41,395 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 14:36:41,395 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 14:36:41,395 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 14:36:41,395 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-12-02 14:36:41,396 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-12-02 14:36:41,396 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 14:36:41,396 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 14:36:41,396 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 14:36:41,396 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 14:36:41,396 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 14:36:41,396 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 14:36:41,396 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_fbed6b39-cc91-4960-b0de-56db5509787e/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 -> 1a779a25b3e5147f7c14d79ede7be3f2d2de62e2de15b88047fe2a162a63a762 [2024-12-02 14:36:41,614 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 14:36:41,622 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 14:36:41,624 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 14:36:41,625 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 14:36:41,625 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 14:36:41,627 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/recursive-simple/fibo_2calls_25-1.c [2024-12-02 14:36:44,337 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/data/d066089d8/30bed17d43e24a0caece8261257178aa/FLAG0ce0add42 [2024-12-02 14:36:44,548 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 14:36:44,548 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/sv-benchmarks/c/recursive-simple/fibo_2calls_25-1.c [2024-12-02 14:36:44,556 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/data/d066089d8/30bed17d43e24a0caece8261257178aa/FLAG0ce0add42 [2024-12-02 14:36:44,571 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/data/d066089d8/30bed17d43e24a0caece8261257178aa [2024-12-02 14:36:44,573 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 14:36:44,574 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 14:36:44,576 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 14:36:44,576 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 14:36:44,580 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 14:36:44,581 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:36:44" (1/1) ... [2024-12-02 14:36:44,582 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42798d92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:36:44, skipping insertion in model container [2024-12-02 14:36:44,582 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:36:44" (1/1) ... [2024-12-02 14:36:44,594 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 14:36:44,742 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_fbed6b39-cc91-4960-b0de-56db5509787e/sv-benchmarks/c/recursive-simple/fibo_2calls_25-1.c[952,965] [2024-12-02 14:36:44,745 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 14:36:44,756 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 14:36:44,771 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_fbed6b39-cc91-4960-b0de-56db5509787e/sv-benchmarks/c/recursive-simple/fibo_2calls_25-1.c[952,965] [2024-12-02 14:36:44,772 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 14:36:44,786 INFO L204 MainTranslator]: Completed translation [2024-12-02 14:36:44,787 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:36:44 WrapperNode [2024-12-02 14:36:44,787 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 14:36:44,788 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 14:36:44,788 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 14:36:44,788 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 14:36:44,795 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:36:44" (1/1) ... [2024-12-02 14:36:44,802 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:36:44" (1/1) ... [2024-12-02 14:36:44,817 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2024-12-02 14:36:44,817 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 14:36:44,818 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 14:36:44,818 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 14:36:44,818 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 14:36:44,827 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:36:44" (1/1) ... [2024-12-02 14:36:44,827 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:36:44" (1/1) ... [2024-12-02 14:36:44,828 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:36:44" (1/1) ... [2024-12-02 14:36:44,839 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 14:36:44,839 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:36:44" (1/1) ... [2024-12-02 14:36:44,839 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:36:44" (1/1) ... [2024-12-02 14:36:44,842 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:36:44" (1/1) ... [2024-12-02 14:36:44,842 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:36:44" (1/1) ... [2024-12-02 14:36:44,844 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:36:44" (1/1) ... [2024-12-02 14:36:44,845 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:36:44" (1/1) ... [2024-12-02 14:36:44,846 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:36:44" (1/1) ... [2024-12-02 14:36:44,847 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 14:36:44,848 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 14:36:44,848 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 14:36:44,848 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 14:36:44,849 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:36:44" (1/1) ... [2024-12-02 14:36:44,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 14:36:44,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:36:44,882 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 14:36:44,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 14:36:44,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 14:36:44,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 14:36:44,914 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2024-12-02 14:36:44,914 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2024-12-02 14:36:44,915 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2024-12-02 14:36:44,915 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2024-12-02 14:36:44,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 14:36:44,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 14:36:44,965 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 14:36:44,967 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 14:36:45,058 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-12-02 14:36:45,058 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 14:36:45,066 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 14:36:45,066 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2024-12-02 14:36:45,067 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:36:45 BoogieIcfgContainer [2024-12-02 14:36:45,067 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 14:36:45,069 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 14:36:45,069 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 14:36:45,073 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 14:36:45,073 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:36:44" (1/3) ... [2024-12-02 14:36:45,074 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45169ab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:36:45, skipping insertion in model container [2024-12-02 14:36:45,074 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:36:44" (2/3) ... [2024-12-02 14:36:45,074 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45169ab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:36:45, skipping insertion in model container [2024-12-02 14:36:45,075 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:36:45" (3/3) ... [2024-12-02 14:36:45,076 INFO L128 eAbstractionObserver]: Analyzing ICFG fibo_2calls_25-1.c [2024-12-02 14:36:45,090 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 14:36:45,092 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fibo_2calls_25-1.c that has 3 procedures, 29 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2024-12-02 14:36:45,144 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 14:36:45,156 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;@4416d8da, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 14:36:45,156 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-12-02 14:36:45,160 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-12-02 14:36:45,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-12-02 14:36:45,166 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:36:45,167 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:36:45,167 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 14:36:45,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:36:45,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1123300790, now seen corresponding path program 1 times [2024-12-02 14:36:45,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:36:45,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871668745] [2024-12-02 14:36:45,180 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:36:45,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:36:45,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:36:45,374 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 14:36:45,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:36:45,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871668745] [2024-12-02 14:36:45,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871668745] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:36:45,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:36:45,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 14:36:45,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874792941] [2024-12-02 14:36:45,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:36:45,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 14:36:45,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:36:45,398 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 14:36:45,399 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 14:36:45,400 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-12-02 14:36:45,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:36:45,441 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2024-12-02 14:36:45,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 14:36:45,443 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-12-02 14:36:45,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:36:45,448 INFO L225 Difference]: With dead ends: 39 [2024-12-02 14:36:45,448 INFO L226 Difference]: Without dead ends: 27 [2024-12-02 14:36:45,451 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 14:36:45,453 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 14:36:45,454 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 124 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 14:36:45,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-12-02 14:36:45,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-12-02 14:36:45,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-12-02 14:36:45,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-12-02 14:36:45,481 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2024-12-02 14:36:45,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:36:45,481 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-12-02 14:36:45,482 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-12-02 14:36:45,482 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-12-02 14:36:45,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-12-02 14:36:45,483 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:36:45,483 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:36:45,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 14:36:45,483 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 14:36:45,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:36:45,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1177745932, now seen corresponding path program 1 times [2024-12-02 14:36:45,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:36:45,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467397899] [2024-12-02 14:36:45,484 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:36:45,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:36:45,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:36:45,560 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 14:36:45,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:36:45,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467397899] [2024-12-02 14:36:45,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467397899] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:36:45,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:36:45,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 14:36:45,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944329146] [2024-12-02 14:36:45,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:36:45,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 14:36:45,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:36:45,563 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 14:36:45,563 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 14:36:45,563 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-12-02 14:36:45,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:36:45,587 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2024-12-02 14:36:45,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 14:36:45,587 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-12-02 14:36:45,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:36:45,588 INFO L225 Difference]: With dead ends: 33 [2024-12-02 14:36:45,588 INFO L226 Difference]: Without dead ends: 29 [2024-12-02 14:36:45,589 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 14:36:45,590 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 14:36:45,590 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 125 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 14:36:45,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-12-02 14:36:45,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2024-12-02 14:36:45,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-12-02 14:36:45,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-12-02 14:36:45,596 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2024-12-02 14:36:45,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:36:45,596 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-12-02 14:36:45,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-12-02 14:36:45,597 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-12-02 14:36:45,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-12-02 14:36:45,597 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:36:45,598 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:36:45,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 14:36:45,598 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 14:36:45,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:36:45,598 INFO L85 PathProgramCache]: Analyzing trace with hash 2110588723, now seen corresponding path program 1 times [2024-12-02 14:36:45,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:36:45,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641751688] [2024-12-02 14:36:45,599 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:36:45,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:36:45,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:36:45,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:36:45,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:36:45,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641751688] [2024-12-02 14:36:45,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641751688] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:36:45,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116161499] [2024-12-02 14:36:45,724 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:36:45,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:36:45,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:36:45,726 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:36:45,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 14:36:45,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:36:45,776 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-02 14:36:45,779 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:36:45,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:36:45,865 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:36:46,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:36:46,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116161499] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:36:46,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:36:46,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2024-12-02 14:36:46,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779003453] [2024-12-02 14:36:46,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:36:46,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-12-02 14:36:46,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:36:46,072 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-12-02 14:36:46,072 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-12-02 14:36:46,072 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2024-12-02 14:36:46,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:36:46,172 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2024-12-02 14:36:46,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 14:36:46,173 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 23 [2024-12-02 14:36:46,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:36:46,174 INFO L225 Difference]: With dead ends: 55 [2024-12-02 14:36:46,174 INFO L226 Difference]: Without dead ends: 31 [2024-12-02 14:36:46,174 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-12-02 14:36:46,175 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 22 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 14:36:46,175 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 105 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:36:46,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-12-02 14:36:46,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2024-12-02 14:36:46,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-12-02 14:36:46,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2024-12-02 14:36:46,182 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2024-12-02 14:36:46,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:36:46,182 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2024-12-02 14:36:46,183 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2024-12-02 14:36:46,183 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2024-12-02 14:36:46,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-12-02 14:36:46,184 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:36:46,184 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:36:46,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 14:36:46,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-12-02 14:36:46,384 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 14:36:46,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:36:46,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1277869167, now seen corresponding path program 1 times [2024-12-02 14:36:46,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:36:46,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117268803] [2024-12-02 14:36:46,385 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:36:46,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:36:46,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:36:46,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:36:46,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:36:46,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117268803] [2024-12-02 14:36:46,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117268803] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:36:46,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865292036] [2024-12-02 14:36:46,481 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:36:46,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:36:46,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:36:46,482 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:36:46,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 14:36:46,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:36:46,518 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-02 14:36:46,519 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:36:46,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:36:46,547 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:36:46,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:36:46,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865292036] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:36:46,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:36:46,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2024-12-02 14:36:46,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136894122] [2024-12-02 14:36:46,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:36:46,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-02 14:36:46,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:36:46,719 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-02 14:36:46,719 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-12-02 14:36:46,720 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2024-12-02 14:36:46,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:36:46,846 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2024-12-02 14:36:46,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 14:36:46,847 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 24 [2024-12-02 14:36:46,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:36:46,848 INFO L225 Difference]: With dead ends: 40 [2024-12-02 14:36:46,848 INFO L226 Difference]: Without dead ends: 36 [2024-12-02 14:36:46,848 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-12-02 14:36:46,849 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 14:36:46,849 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 135 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:36:46,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-12-02 14:36:46,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2024-12-02 14:36:46,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2024-12-02 14:36:46,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2024-12-02 14:36:46,854 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 24 [2024-12-02 14:36:46,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:36:46,854 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2024-12-02 14:36:46,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2024-12-02 14:36:46,854 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2024-12-02 14:36:46,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-12-02 14:36:46,855 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:36:46,855 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:36:46,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 14:36:47,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:36:47,056 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 14:36:47,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:36:47,056 INFO L85 PathProgramCache]: Analyzing trace with hash -2061621832, now seen corresponding path program 1 times [2024-12-02 14:36:47,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:36:47,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178796929] [2024-12-02 14:36:47,057 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:36:47,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:36:47,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:36:47,135 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:36:47,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:36:47,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178796929] [2024-12-02 14:36:47,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178796929] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:36:47,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650252715] [2024-12-02 14:36:47,136 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:36:47,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:36:47,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:36:47,138 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:36:47,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 14:36:47,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:36:47,182 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 14:36:47,184 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:36:47,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-12-02 14:36:47,255 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:36:47,593 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 14:36:47,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650252715] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:36:47,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:36:47,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 14 [2024-12-02 14:36:47,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107764411] [2024-12-02 14:36:47,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:36:47,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-12-02 14:36:47,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:36:47,595 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-12-02 14:36:47,595 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-12-02 14:36:47,595 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2024-12-02 14:36:47,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:36:47,735 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2024-12-02 14:36:47,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 14:36:47,736 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) Word has length 36 [2024-12-02 14:36:47,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:36:47,737 INFO L225 Difference]: With dead ends: 69 [2024-12-02 14:36:47,737 INFO L226 Difference]: Without dead ends: 38 [2024-12-02 14:36:47,737 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-12-02 14:36:47,738 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 14:36:47,738 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 146 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:36:47,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-12-02 14:36:47,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2024-12-02 14:36:47,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.173913043478261) internal successors, (27), 26 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2024-12-02 14:36:47,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2024-12-02 14:36:47,746 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 36 [2024-12-02 14:36:47,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:36:47,746 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2024-12-02 14:36:47,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2024-12-02 14:36:47,746 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2024-12-02 14:36:47,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-12-02 14:36:47,747 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:36:47,747 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:36:47,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 14:36:47,947 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:36:47,948 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 14:36:47,948 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:36:47,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1167294498, now seen corresponding path program 1 times [2024-12-02 14:36:47,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:36:47,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663698477] [2024-12-02 14:36:47,948 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:36:47,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:36:47,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:36:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-12-02 14:36:48,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:36:48,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663698477] [2024-12-02 14:36:48,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663698477] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:36:48,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371297151] [2024-12-02 14:36:48,069 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:36:48,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:36:48,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:36:48,072 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:36:48,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 14:36:48,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:36:48,118 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 14:36:48,120 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:36:48,205 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:36:48,205 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:36:48,515 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 14:36:48,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371297151] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:36:48,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:36:48,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 18 [2024-12-02 14:36:48,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071142582] [2024-12-02 14:36:48,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:36:48,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-12-02 14:36:48,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:36:48,517 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-12-02 14:36:48,517 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2024-12-02 14:36:48,517 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2024-12-02 14:36:48,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:36:48,896 INFO L93 Difference]: Finished difference Result 101 states and 161 transitions. [2024-12-02 14:36:48,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-12-02 14:36:48,896 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) Word has length 37 [2024-12-02 14:36:48,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:36:48,897 INFO L225 Difference]: With dead ends: 101 [2024-12-02 14:36:48,897 INFO L226 Difference]: Without dead ends: 68 [2024-12-02 14:36:48,898 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2024-12-02 14:36:48,899 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 39 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 14:36:48,899 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 300 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 14:36:48,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-12-02 14:36:48,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2024-12-02 14:36:48,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 39 states have internal predecessors, (41), 11 states have call successors, (11), 3 states have call predecessors, (11), 9 states have return successors, (34), 13 states have call predecessors, (34), 11 states have call successors, (34) [2024-12-02 14:36:48,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 86 transitions. [2024-12-02 14:36:48,911 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 86 transitions. Word has length 37 [2024-12-02 14:36:48,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:36:48,911 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 86 transitions. [2024-12-02 14:36:48,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2024-12-02 14:36:48,912 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 86 transitions. [2024-12-02 14:36:48,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-12-02 14:36:48,914 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:36:48,914 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:36:48,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 14:36:49,116 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:36:49,116 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 14:36:49,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:36:49,117 INFO L85 PathProgramCache]: Analyzing trace with hash 384535367, now seen corresponding path program 1 times [2024-12-02 14:36:49,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:36:49,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547612179] [2024-12-02 14:36:49,117 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:36:49,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:36:49,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:36:49,231 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-12-02 14:36:49,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:36:49,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547612179] [2024-12-02 14:36:49,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547612179] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:36:49,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285197363] [2024-12-02 14:36:49,231 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:36:49,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:36:49,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:36:49,233 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:36:49,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 14:36:49,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:36:49,281 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-12-02 14:36:49,283 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:36:49,357 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-12-02 14:36:49,358 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:36:49,785 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-12-02 14:36:49,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285197363] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:36:49,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:36:49,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 17 [2024-12-02 14:36:49,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191796566] [2024-12-02 14:36:49,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:36:49,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-12-02 14:36:49,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:36:49,786 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-12-02 14:36:49,787 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-12-02 14:36:49,787 INFO L87 Difference]: Start difference. First operand 56 states and 86 transitions. Second operand has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) [2024-12-02 14:36:49,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:36:49,969 INFO L93 Difference]: Finished difference Result 102 states and 193 transitions. [2024-12-02 14:36:49,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 14:36:49,969 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) Word has length 51 [2024-12-02 14:36:49,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:36:49,971 INFO L225 Difference]: With dead ends: 102 [2024-12-02 14:36:49,971 INFO L226 Difference]: Without dead ends: 98 [2024-12-02 14:36:49,971 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2024-12-02 14:36:49,972 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 35 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 14:36:49,972 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 161 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:36:49,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-12-02 14:36:49,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2024-12-02 14:36:49,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.15) internal successors, (46), 44 states have internal predecessors, (46), 12 states have call successors, (12), 3 states have call predecessors, (12), 11 states have return successors, (48), 16 states have call predecessors, (48), 12 states have call successors, (48) [2024-12-02 14:36:49,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 106 transitions. [2024-12-02 14:36:49,990 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 106 transitions. Word has length 51 [2024-12-02 14:36:49,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:36:49,991 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 106 transitions. [2024-12-02 14:36:49,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) [2024-12-02 14:36:49,991 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 106 transitions. [2024-12-02 14:36:49,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-12-02 14:36:49,994 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:36:49,994 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:36:50,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 14:36:50,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:36:50,195 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 14:36:50,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:36:50,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1770426885, now seen corresponding path program 1 times [2024-12-02 14:36:50,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:36:50,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052791531] [2024-12-02 14:36:50,196 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:36:50,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:36:50,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:36:50,408 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 81 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2024-12-02 14:36:50,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:36:50,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052791531] [2024-12-02 14:36:50,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052791531] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:36:50,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952807410] [2024-12-02 14:36:50,409 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:36:50,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:36:50,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:36:50,411 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:36:50,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 14:36:50,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:36:50,482 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-12-02 14:36:50,485 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:36:50,614 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 17 proven. 119 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-12-02 14:36:50,614 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:36:51,377 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 17 proven. 129 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2024-12-02 14:36:51,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952807410] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:36:51,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:36:51,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 23 [2024-12-02 14:36:51,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967409389] [2024-12-02 14:36:51,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:36:51,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-12-02 14:36:51,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:36:51,380 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-12-02 14:36:51,380 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2024-12-02 14:36:51,380 INFO L87 Difference]: Start difference. First operand 64 states and 106 transitions. Second operand has 23 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 23 states have internal predecessors, (75), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) [2024-12-02 14:36:51,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:36:51,916 INFO L93 Difference]: Finished difference Result 177 states and 369 transitions. [2024-12-02 14:36:51,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-12-02 14:36:51,917 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 23 states have internal predecessors, (75), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) Word has length 107 [2024-12-02 14:36:51,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:36:51,919 INFO L225 Difference]: With dead ends: 177 [2024-12-02 14:36:51,920 INFO L226 Difference]: Without dead ends: 104 [2024-12-02 14:36:51,922 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 197 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2024-12-02 14:36:51,922 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 78 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 14:36:51,923 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 352 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 14:36:51,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-12-02 14:36:51,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2024-12-02 14:36:51,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 64 states have internal predecessors, (73), 16 states have call successors, (16), 8 states have call predecessors, (16), 14 states have return successors, (43), 20 states have call predecessors, (43), 16 states have call successors, (43) [2024-12-02 14:36:51,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 132 transitions. [2024-12-02 14:36:51,941 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 132 transitions. Word has length 107 [2024-12-02 14:36:51,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:36:51,941 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 132 transitions. [2024-12-02 14:36:51,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 23 states have internal predecessors, (75), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) [2024-12-02 14:36:51,942 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 132 transitions. [2024-12-02 14:36:51,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2024-12-02 14:36:51,944 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:36:51,945 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 9, 9, 9, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:36:51,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 14:36:52,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:36:52,145 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 14:36:52,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:36:52,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1566869308, now seen corresponding path program 1 times [2024-12-02 14:36:52,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:36:52,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093377110] [2024-12-02 14:36:52,146 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:36:52,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:36:52,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:36:52,337 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 42 proven. 158 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2024-12-02 14:36:52,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:36:52,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093377110] [2024-12-02 14:36:52,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093377110] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:36:52,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637310715] [2024-12-02 14:36:52,338 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:36:52,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:36:52,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:36:52,340 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:36:52,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 14:36:52,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:36:52,427 INFO L256 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-12-02 14:36:52,430 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:36:52,545 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 29 proven. 212 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2024-12-02 14:36:52,545 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:36:53,674 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 29 proven. 228 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2024-12-02 14:36:53,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637310715] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:36:53,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:36:53,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 15] total 23 [2024-12-02 14:36:53,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611049114] [2024-12-02 14:36:53,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:36:53,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-12-02 14:36:53,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:36:53,677 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-12-02 14:36:53,677 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2024-12-02 14:36:53,677 INFO L87 Difference]: Start difference. First operand 93 states and 132 transitions. Second operand has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) [2024-12-02 14:36:53,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:36:53,896 INFO L93 Difference]: Finished difference Result 132 states and 227 transitions. [2024-12-02 14:36:53,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-12-02 14:36:53,896 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) Word has length 146 [2024-12-02 14:36:53,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:36:53,899 INFO L225 Difference]: With dead ends: 132 [2024-12-02 14:36:53,899 INFO L226 Difference]: Without dead ends: 128 [2024-12-02 14:36:53,899 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 276 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2024-12-02 14:36:53,900 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 14:36:53,900 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 209 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:36:53,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-12-02 14:36:53,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 118. [2024-12-02 14:36:53,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 79 states have internal predecessors, (88), 21 states have call successors, (21), 8 states have call predecessors, (21), 19 states have return successors, (85), 30 states have call predecessors, (85), 21 states have call successors, (85) [2024-12-02 14:36:53,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 194 transitions. [2024-12-02 14:36:53,927 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 194 transitions. Word has length 146 [2024-12-02 14:36:53,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:36:53,927 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 194 transitions. [2024-12-02 14:36:53,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) [2024-12-02 14:36:53,927 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 194 transitions. [2024-12-02 14:36:53,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2024-12-02 14:36:53,931 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:36:53,931 INFO L218 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 18, 16, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 8, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:36:53,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 14:36:54,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-12-02 14:36:54,131 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 14:36:54,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:36:54,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1279109938, now seen corresponding path program 2 times [2024-12-02 14:36:54,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:36:54,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873731601] [2024-12-02 14:36:54,132 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:36:54,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:36:54,170 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:36:54,170 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:36:54,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 158 proven. 490 refuted. 0 times theorem prover too weak. 1585 trivial. 0 not checked. [2024-12-02 14:36:54,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:36:54,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873731601] [2024-12-02 14:36:54,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873731601] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:36:54,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385683174] [2024-12-02 14:36:54,536 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:36:54,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:36:54,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:36:54,538 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:36:54,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 14:36:54,698 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:36:54,698 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:36:54,700 INFO L256 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-12-02 14:36:54,706 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:36:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 87 proven. 569 refuted. 0 times theorem prover too weak. 1577 trivial. 0 not checked. [2024-12-02 14:36:54,850 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:36:56,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 87 proven. 593 refuted. 0 times theorem prover too weak. 1553 trivial. 0 not checked. [2024-12-02 14:36:56,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385683174] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:36:56,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:36:56,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 17] total 29 [2024-12-02 14:36:56,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506744635] [2024-12-02 14:36:56,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:36:56,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-12-02 14:36:56,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:36:56,622 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-12-02 14:36:56,623 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2024-12-02 14:36:56,623 INFO L87 Difference]: Start difference. First operand 118 states and 194 transitions. Second operand has 29 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 29 states have internal predecessors, (95), 24 states have call successors, (30), 1 states have call predecessors, (30), 12 states have return successors, (37), 13 states have call predecessors, (37), 24 states have call successors, (37) [2024-12-02 14:36:57,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:36:57,335 INFO L93 Difference]: Finished difference Result 323 states and 666 transitions. [2024-12-02 14:36:57,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-12-02 14:36:57,335 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 29 states have internal predecessors, (95), 24 states have call successors, (30), 1 states have call predecessors, (30), 12 states have return successors, (37), 13 states have call predecessors, (37), 24 states have call successors, (37) Word has length 284 [2024-12-02 14:36:57,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:36:57,338 INFO L225 Difference]: With dead ends: 323 [2024-12-02 14:36:57,338 INFO L226 Difference]: Without dead ends: 214 [2024-12-02 14:36:57,339 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 547 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=449, Invalid=2413, Unknown=0, NotChecked=0, Total=2862 [2024-12-02 14:36:57,340 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 129 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-12-02 14:36:57,340 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 481 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-12-02 14:36:57,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2024-12-02 14:36:57,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 184. [2024-12-02 14:36:57,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 123 states have (on average 1.1869918699186992) internal successors, (146), 123 states have internal predecessors, (146), 35 states have call successors, (35), 17 states have call predecessors, (35), 25 states have return successors, (120), 43 states have call predecessors, (120), 35 states have call successors, (120) [2024-12-02 14:36:57,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 301 transitions. [2024-12-02 14:36:57,370 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 301 transitions. Word has length 284 [2024-12-02 14:36:57,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:36:57,371 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 301 transitions. [2024-12-02 14:36:57,371 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 29 states have internal predecessors, (95), 24 states have call successors, (30), 1 states have call predecessors, (30), 12 states have return successors, (37), 13 states have call predecessors, (37), 24 states have call successors, (37) [2024-12-02 14:36:57,371 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 301 transitions. [2024-12-02 14:36:57,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2024-12-02 14:36:57,378 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:36:57,378 INFO L218 NwaCegarLoop]: trace histogram [26, 26, 23, 23, 20, 18, 13, 13, 13, 13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 11, 9, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:36:57,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-12-02 14:36:57,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-12-02 14:36:57,578 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 14:36:57,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:36:57,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1509408310, now seen corresponding path program 3 times [2024-12-02 14:36:57,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:36:57,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100114158] [2024-12-02 14:36:57,579 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:36:57,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:36:57,606 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-12-02 14:36:57,606 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:36:57,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3187 backedges. 488 proven. 80 refuted. 0 times theorem prover too weak. 2619 trivial. 0 not checked. [2024-12-02 14:36:57,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:36:57,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100114158] [2024-12-02 14:36:57,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100114158] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:36:57,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808029381] [2024-12-02 14:36:57,780 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:36:57,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:36:57,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:36:57,782 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:36:57,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 14:36:57,913 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-12-02 14:36:57,913 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:36:57,914 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-12-02 14:36:57,920 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:36:57,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3187 backedges. 496 proven. 83 refuted. 0 times theorem prover too weak. 2608 trivial. 0 not checked. [2024-12-02 14:36:57,996 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:36:59,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3187 backedges. 500 proven. 89 refuted. 0 times theorem prover too weak. 2598 trivial. 0 not checked. [2024-12-02 14:36:59,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808029381] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:36:59,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:36:59,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 18 [2024-12-02 14:36:59,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20849131] [2024-12-02 14:36:59,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:36:59,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-12-02 14:36:59,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:36:59,113 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-12-02 14:36:59,113 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-12-02 14:36:59,113 INFO L87 Difference]: Start difference. First operand 184 states and 301 transitions. Second operand has 18 states, 16 states have (on average 4.0) internal successors, (64), 18 states have internal predecessors, (64), 12 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 10 states have call predecessors, (22), 12 states have call successors, (22) [2024-12-02 14:36:59,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:36:59,284 INFO L93 Difference]: Finished difference Result 255 states and 465 transitions. [2024-12-02 14:36:59,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 14:36:59,285 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 4.0) internal successors, (64), 18 states have internal predecessors, (64), 12 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 10 states have call predecessors, (22), 12 states have call successors, (22) Word has length 336 [2024-12-02 14:36:59,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:36:59,290 INFO L225 Difference]: With dead ends: 255 [2024-12-02 14:36:59,290 INFO L226 Difference]: Without dead ends: 251 [2024-12-02 14:36:59,291 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 687 GetRequests, 662 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2024-12-02 14:36:59,291 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 41 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 14:36:59,291 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 164 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:36:59,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-12-02 14:36:59,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 224. [2024-12-02 14:36:59,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 148 states have (on average 1.1689189189189189) internal successors, (173), 149 states have internal predecessors, (173), 45 states have call successors, (45), 20 states have call predecessors, (45), 30 states have return successors, (187), 54 states have call predecessors, (187), 45 states have call successors, (187) [2024-12-02 14:36:59,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 405 transitions. [2024-12-02 14:36:59,321 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 405 transitions. Word has length 336 [2024-12-02 14:36:59,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:36:59,321 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 405 transitions. [2024-12-02 14:36:59,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 4.0) internal successors, (64), 18 states have internal predecessors, (64), 12 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 10 states have call predecessors, (22), 12 states have call successors, (22) [2024-12-02 14:36:59,322 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 405 transitions. [2024-12-02 14:36:59,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2024-12-02 14:36:59,326 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:36:59,327 INFO L218 NwaCegarLoop]: trace histogram [42, 42, 30, 29, 29, 24, 21, 21, 21, 21, 21, 21, 21, 16, 14, 14, 14, 14, 14, 14, 14, 12, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:36:59,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-12-02 14:36:59,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-12-02 14:36:59,527 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 14:36:59,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:36:59,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1192940537, now seen corresponding path program 4 times [2024-12-02 14:36:59,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:36:59,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860917466] [2024-12-02 14:36:59,528 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 14:36:59,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:36:59,586 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 14:36:59,586 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:36:59,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6983 backedges. 182 proven. 720 refuted. 0 times theorem prover too weak. 6081 trivial. 0 not checked. [2024-12-02 14:36:59,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:36:59,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860917466] [2024-12-02 14:36:59,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860917466] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:36:59,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061521522] [2024-12-02 14:36:59,893 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 14:36:59,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:36:59,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:36:59,895 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:36:59,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-02 14:37:00,101 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 14:37:00,102 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:37:00,105 INFO L256 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 14:37:00,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:37:00,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6983 backedges. 1267 proven. 6 refuted. 0 times theorem prover too weak. 5710 trivial. 0 not checked. [2024-12-02 14:37:00,171 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:37:01,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6983 backedges. 188 proven. 860 refuted. 0 times theorem prover too weak. 5935 trivial. 0 not checked. [2024-12-02 14:37:01,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061521522] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:37:01,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:37:01,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2024-12-02 14:37:01,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343046047] [2024-12-02 14:37:01,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:37:01,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-12-02 14:37:01,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:37:01,387 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-12-02 14:37:01,387 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-12-02 14:37:01,387 INFO L87 Difference]: Start difference. First operand 224 states and 405 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (20), 5 states have call predecessors, (20), 7 states have call successors, (20) [2024-12-02 14:37:01,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:37:01,547 INFO L93 Difference]: Finished difference Result 412 states and 767 transitions. [2024-12-02 14:37:01,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 14:37:01,547 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (20), 5 states have call predecessors, (20), 7 states have call successors, (20) Word has length 484 [2024-12-02 14:37:01,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:37:01,550 INFO L225 Difference]: With dead ends: 412 [2024-12-02 14:37:01,550 INFO L226 Difference]: Without dead ends: 193 [2024-12-02 14:37:01,553 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 980 GetRequests, 958 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2024-12-02 14:37:01,553 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 23 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 14:37:01,553 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 153 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:37:01,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2024-12-02 14:37:01,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 186. [2024-12-02 14:37:01,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 125 states have (on average 1.16) internal successors, (145), 124 states have internal predecessors, (145), 37 states have call successors, (37), 19 states have call predecessors, (37), 23 states have return successors, (112), 42 states have call predecessors, (112), 37 states have call successors, (112) [2024-12-02 14:37:01,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 294 transitions. [2024-12-02 14:37:01,576 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 294 transitions. Word has length 484 [2024-12-02 14:37:01,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:37:01,576 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 294 transitions. [2024-12-02 14:37:01,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (20), 5 states have call predecessors, (20), 7 states have call successors, (20) [2024-12-02 14:37:01,577 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 294 transitions. [2024-12-02 14:37:01,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2024-12-02 14:37:01,580 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:37:01,580 INFO L218 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 21, 20, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 8, 8, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:37:01,589 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-12-02 14:37:01,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-12-02 14:37:01,781 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 14:37:01,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:37:01,781 INFO L85 PathProgramCache]: Analyzing trace with hash -240108639, now seen corresponding path program 5 times [2024-12-02 14:37:01,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:37:01,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187805629] [2024-12-02 14:37:01,781 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 14:37:01,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:37:01,797 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 14:37:01,797 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:37:01,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3476 backedges. 183 proven. 538 refuted. 0 times theorem prover too weak. 2755 trivial. 0 not checked. [2024-12-02 14:37:01,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:37:01,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187805629] [2024-12-02 14:37:01,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187805629] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:37:01,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076698557] [2024-12-02 14:37:01,885 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 14:37:01,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:37:01,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:37:01,887 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:37:01,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-12-02 14:37:02,001 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 14:37:02,002 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:37:02,002 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-12-02 14:37:02,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:37:02,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3476 backedges. 1045 proven. 13 refuted. 0 times theorem prover too weak. 2418 trivial. 0 not checked. [2024-12-02 14:37:02,079 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:37:03,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3476 backedges. 183 proven. 538 refuted. 0 times theorem prover too weak. 2755 trivial. 0 not checked. [2024-12-02 14:37:03,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076698557] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:37:03,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:37:03,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 17 [2024-12-02 14:37:03,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552359326] [2024-12-02 14:37:03,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:37:03,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-12-02 14:37:03,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:37:03,091 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-12-02 14:37:03,092 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2024-12-02 14:37:03,092 INFO L87 Difference]: Start difference. First operand 186 states and 294 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 8 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (22), 6 states have call predecessors, (22), 8 states have call successors, (22) [2024-12-02 14:37:03,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:37:03,206 INFO L93 Difference]: Finished difference Result 345 states and 585 transitions. [2024-12-02 14:37:03,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 14:37:03,207 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 8 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (22), 6 states have call predecessors, (22), 8 states have call successors, (22) Word has length 351 [2024-12-02 14:37:03,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:37:03,209 INFO L225 Difference]: With dead ends: 345 [2024-12-02 14:37:03,209 INFO L226 Difference]: Without dead ends: 147 [2024-12-02 14:37:03,210 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 714 GetRequests, 692 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2024-12-02 14:37:03,210 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 20 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 14:37:03,211 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 163 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:37:03,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-12-02 14:37:03,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2024-12-02 14:37:03,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 100 states have internal predecessors, (118), 27 states have call successors, (27), 17 states have call predecessors, (27), 18 states have return successors, (77), 29 states have call predecessors, (77), 27 states have call successors, (77) [2024-12-02 14:37:03,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 222 transitions. [2024-12-02 14:37:03,222 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 222 transitions. Word has length 351 [2024-12-02 14:37:03,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:37:03,222 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 222 transitions. [2024-12-02 14:37:03,222 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 8 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (22), 6 states have call predecessors, (22), 8 states have call successors, (22) [2024-12-02 14:37:03,222 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 222 transitions. [2024-12-02 14:37:03,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2024-12-02 14:37:03,224 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:37:03,224 INFO L218 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 21, 18, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 9, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:37:03,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-12-02 14:37:03,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-12-02 14:37:03,425 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 14:37:03,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:37:03,425 INFO L85 PathProgramCache]: Analyzing trace with hash 684608424, now seen corresponding path program 6 times [2024-12-02 14:37:03,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:37:03,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588776720] [2024-12-02 14:37:03,425 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 14:37:03,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:37:03,462 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-12-02 14:37:03,462 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:37:03,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3195 backedges. 219 proven. 588 refuted. 0 times theorem prover too weak. 2388 trivial. 0 not checked. [2024-12-02 14:37:03,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:37:03,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588776720] [2024-12-02 14:37:03,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588776720] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:37:03,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297643384] [2024-12-02 14:37:03,643 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 14:37:03,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:37:03,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:37:03,645 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:37:03,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-12-02 14:37:03,811 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-12-02 14:37:03,811 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:37:03,813 INFO L256 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-12-02 14:37:03,818 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:37:03,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3195 backedges. 1436 proven. 46 refuted. 0 times theorem prover too weak. 1713 trivial. 0 not checked. [2024-12-02 14:37:03,868 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:37:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3195 backedges. 219 proven. 589 refuted. 0 times theorem prover too weak. 2387 trivial. 0 not checked. [2024-12-02 14:37:05,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297643384] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:37:05,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:37:05,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 17 [2024-12-02 14:37:05,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094841092] [2024-12-02 14:37:05,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:37:05,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-12-02 14:37:05,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:37:05,033 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-12-02 14:37:05,033 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2024-12-02 14:37:05,034 INFO L87 Difference]: Start difference. First operand 147 states and 222 transitions. Second operand has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 10 states have call successors, (23), 2 states have call predecessors, (23), 7 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2024-12-02 14:37:05,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:37:05,246 INFO L93 Difference]: Finished difference Result 312 states and 512 transitions. [2024-12-02 14:37:05,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 14:37:05,246 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 10 states have call successors, (23), 2 states have call predecessors, (23), 7 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) Word has length 337 [2024-12-02 14:37:05,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:37:05,248 INFO L225 Difference]: With dead ends: 312 [2024-12-02 14:37:05,248 INFO L226 Difference]: Without dead ends: 172 [2024-12-02 14:37:05,249 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 664 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2024-12-02 14:37:05,249 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 24 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 14:37:05,249 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 317 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:37:05,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-12-02 14:37:05,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 166. [2024-12-02 14:37:05,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 115 states have (on average 1.1478260869565218) internal successors, (132), 111 states have internal predecessors, (132), 29 states have call successors, (29), 20 states have call predecessors, (29), 21 states have return successors, (97), 34 states have call predecessors, (97), 29 states have call successors, (97) [2024-12-02 14:37:05,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 258 transitions. [2024-12-02 14:37:05,261 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 258 transitions. Word has length 337 [2024-12-02 14:37:05,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:37:05,262 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 258 transitions. [2024-12-02 14:37:05,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 10 states have call successors, (23), 2 states have call predecessors, (23), 7 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2024-12-02 14:37:05,262 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 258 transitions. [2024-12-02 14:37:05,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2024-12-02 14:37:05,264 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:37:05,265 INFO L218 NwaCegarLoop]: trace histogram [42, 42, 33, 33, 32, 31, 21, 21, 21, 21, 21, 21, 21, 16, 16, 16, 16, 16, 16, 16, 16, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:37:05,273 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-12-02 14:37:05,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-12-02 14:37:05,465 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 14:37:05,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:37:05,466 INFO L85 PathProgramCache]: Analyzing trace with hash 268905289, now seen corresponding path program 7 times [2024-12-02 14:37:05,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:37:05,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219147007] [2024-12-02 14:37:05,466 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 14:37:05,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:37:05,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:37:05,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7837 backedges. 274 proven. 870 refuted. 0 times theorem prover too weak. 6693 trivial. 0 not checked. [2024-12-02 14:37:05,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:37:05,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219147007] [2024-12-02 14:37:05,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219147007] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:37:05,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245591702] [2024-12-02 14:37:05,989 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 14:37:05,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:37:05,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:37:05,991 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:37:05,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-12-02 14:37:06,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:37:06,211 INFO L256 TraceCheckSpWp]: Trace formula consists of 1167 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-12-02 14:37:06,217 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:37:06,324 INFO L134 CoverageAnalysis]: Checked inductivity of 7837 backedges. 209 proven. 1294 refuted. 0 times theorem prover too weak. 6334 trivial. 0 not checked. [2024-12-02 14:37:06,324 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:37:08,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7837 backedges. 209 proven. 1327 refuted. 0 times theorem prover too weak. 6301 trivial. 0 not checked. [2024-12-02 14:37:08,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245591702] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:37:08,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:37:08,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 19] total 26 [2024-12-02 14:37:08,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293912302] [2024-12-02 14:37:08,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:37:08,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-12-02 14:37:08,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:37:08,968 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-12-02 14:37:08,968 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2024-12-02 14:37:08,968 INFO L87 Difference]: Start difference. First operand 166 states and 258 transitions. Second operand has 26 states, 24 states have (on average 3.625) internal successors, (87), 26 states have internal predecessors, (87), 22 states have call successors, (26), 1 states have call predecessors, (26), 13 states have return successors, (36), 14 states have call predecessors, (36), 22 states have call successors, (36) [2024-12-02 14:37:09,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:37:09,199 INFO L93 Difference]: Finished difference Result 218 states and 397 transitions. [2024-12-02 14:37:09,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-12-02 14:37:09,200 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.625) internal successors, (87), 26 states have internal predecessors, (87), 22 states have call successors, (26), 1 states have call predecessors, (26), 13 states have return successors, (36), 14 states have call predecessors, (36), 22 states have call successors, (36) Word has length 517 [2024-12-02 14:37:09,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:37:09,202 INFO L225 Difference]: With dead ends: 218 [2024-12-02 14:37:09,202 INFO L226 Difference]: Without dead ends: 214 [2024-12-02 14:37:09,203 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1058 GetRequests, 1015 SyntacticMatches, 8 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=1080, Unknown=0, NotChecked=0, Total=1332 [2024-12-02 14:37:09,203 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 59 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 14:37:09,203 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 209 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:37:09,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2024-12-02 14:37:09,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 203. [2024-12-02 14:37:09,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 137 states have (on average 1.1240875912408759) internal successors, (154), 133 states have internal predecessors, (154), 37 states have call successors, (37), 20 states have call predecessors, (37), 28 states have return successors, (169), 49 states have call predecessors, (169), 37 states have call successors, (169) [2024-12-02 14:37:09,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 360 transitions. [2024-12-02 14:37:09,219 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 360 transitions. Word has length 517 [2024-12-02 14:37:09,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:37:09,219 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 360 transitions. [2024-12-02 14:37:09,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.625) internal successors, (87), 26 states have internal predecessors, (87), 22 states have call successors, (26), 1 states have call predecessors, (26), 13 states have return successors, (36), 14 states have call predecessors, (36), 22 states have call successors, (36) [2024-12-02 14:37:09,219 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 360 transitions. [2024-12-02 14:37:09,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 880 [2024-12-02 14:37:09,224 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:37:09,225 INFO L218 NwaCegarLoop]: trace histogram [64, 64, 63, 63, 63, 50, 32, 32, 32, 32, 32, 32, 32, 32, 31, 31, 31, 31, 31, 31, 31, 18, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:37:09,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-12-02 14:37:09,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-12-02 14:37:09,426 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 14:37:09,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:37:09,426 INFO L85 PathProgramCache]: Analyzing trace with hash 2065550717, now seen corresponding path program 8 times [2024-12-02 14:37:09,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:37:09,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721424383] [2024-12-02 14:37:09,426 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:37:09,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:37:09,533 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:37:09,533 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:37:10,532 INFO L134 CoverageAnalysis]: Checked inductivity of 22898 backedges. 459 proven. 1882 refuted. 0 times theorem prover too weak. 20557 trivial. 0 not checked. [2024-12-02 14:37:10,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:37:10,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721424383] [2024-12-02 14:37:10,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721424383] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:37:10,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045737248] [2024-12-02 14:37:10,533 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:37:10,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:37:10,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:37:10,535 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:37:10,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-12-02 14:37:10,874 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:37:10,874 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:37:10,878 INFO L256 TraceCheckSpWp]: Trace formula consists of 1969 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-12-02 14:37:10,886 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:37:11,016 INFO L134 CoverageAnalysis]: Checked inductivity of 22898 backedges. 341 proven. 2658 refuted. 0 times theorem prover too weak. 19899 trivial. 0 not checked. [2024-12-02 14:37:11,017 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:37:14,907 INFO L134 CoverageAnalysis]: Checked inductivity of 22898 backedges. 341 proven. 2702 refuted. 0 times theorem prover too weak. 19855 trivial. 0 not checked. [2024-12-02 14:37:14,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045737248] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:37:14,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:37:14,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 21] total 28 [2024-12-02 14:37:14,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369649476] [2024-12-02 14:37:14,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:37:14,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-12-02 14:37:14,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:37:14,910 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-12-02 14:37:14,910 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2024-12-02 14:37:14,910 INFO L87 Difference]: Start difference. First operand 203 states and 360 transitions. Second operand has 28 states, 26 states have (on average 3.576923076923077) internal successors, (93), 28 states have internal predecessors, (93), 24 states have call successors, (28), 1 states have call predecessors, (28), 14 states have return successors, (39), 15 states have call predecessors, (39), 24 states have call successors, (39) [2024-12-02 14:37:15,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:37:15,213 INFO L93 Difference]: Finished difference Result 252 states and 524 transitions. [2024-12-02 14:37:15,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-12-02 14:37:15,213 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.576923076923077) internal successors, (93), 28 states have internal predecessors, (93), 24 states have call successors, (28), 1 states have call predecessors, (28), 14 states have return successors, (39), 15 states have call predecessors, (39), 24 states have call successors, (39) Word has length 879 [2024-12-02 14:37:15,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:37:15,216 INFO L225 Difference]: With dead ends: 252 [2024-12-02 14:37:15,216 INFO L226 Difference]: Without dead ends: 248 [2024-12-02 14:37:15,217 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1785 GetRequests, 1738 SyntacticMatches, 9 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=292, Invalid=1268, Unknown=0, NotChecked=0, Total=1560 [2024-12-02 14:37:15,217 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 107 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 14:37:15,217 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 214 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 14:37:15,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2024-12-02 14:37:15,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 187. [2024-12-02 14:37:15,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 128 states have (on average 1.1328125) internal successors, (145), 124 states have internal predecessors, (145), 32 states have call successors, (32), 20 states have call predecessors, (32), 26 states have return successors, (131), 42 states have call predecessors, (131), 32 states have call successors, (131) [2024-12-02 14:37:15,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 308 transitions. [2024-12-02 14:37:15,246 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 308 transitions. Word has length 879 [2024-12-02 14:37:15,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:37:15,246 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 308 transitions. [2024-12-02 14:37:15,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 3.576923076923077) internal successors, (93), 28 states have internal predecessors, (93), 24 states have call successors, (28), 1 states have call predecessors, (28), 14 states have return successors, (39), 15 states have call predecessors, (39), 24 states have call successors, (39) [2024-12-02 14:37:15,247 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 308 transitions. [2024-12-02 14:37:15,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1400 [2024-12-02 14:37:15,262 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:37:15,262 INFO L218 NwaCegarLoop]: trace histogram [102, 102, 101, 101, 90, 87, 51, 51, 51, 51, 51, 51, 51, 50, 50, 50, 50, 50, 50, 50, 40, 36, 14, 12, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:37:15,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-12-02 14:37:15,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-12-02 14:37:15,463 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 14:37:15,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:37:15,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1740069691, now seen corresponding path program 9 times [2024-12-02 14:37:15,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:37:15,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993529843] [2024-12-02 14:37:15,464 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:37:15,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:37:15,527 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 14:37:15,528 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:37:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 58550 backedges. 2098 proven. 2 refuted. 0 times theorem prover too weak. 56450 trivial. 0 not checked. [2024-12-02 14:37:15,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:37:15,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993529843] [2024-12-02 14:37:15,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993529843] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:37:15,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297241514] [2024-12-02 14:37:15,582 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:37:15,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:37:15,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:37:15,584 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:37:15,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-12-02 14:37:15,819 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 14:37:15,819 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:37:15,820 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-02 14:37:15,836 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:37:15,883 INFO L134 CoverageAnalysis]: Checked inductivity of 58550 backedges. 2096 proven. 4 refuted. 0 times theorem prover too weak. 56450 trivial. 0 not checked. [2024-12-02 14:37:15,883 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:37:18,737 INFO L134 CoverageAnalysis]: Checked inductivity of 58550 backedges. 2096 proven. 4 refuted. 0 times theorem prover too weak. 56450 trivial. 0 not checked. [2024-12-02 14:37:18,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297241514] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:37:18,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:37:18,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 11 [2024-12-02 14:37:18,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432210024] [2024-12-02 14:37:18,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:37:18,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-12-02 14:37:18,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:37:18,741 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-12-02 14:37:18,741 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-12-02 14:37:18,741 INFO L87 Difference]: Start difference. First operand 187 states and 308 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2024-12-02 14:37:18,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:37:18,808 INFO L93 Difference]: Finished difference Result 367 states and 676 transitions. [2024-12-02 14:37:18,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 14:37:18,809 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 1399 [2024-12-02 14:37:18,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:37:18,810 INFO L225 Difference]: With dead ends: 367 [2024-12-02 14:37:18,810 INFO L226 Difference]: Without dead ends: 182 [2024-12-02 14:37:18,811 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2807 GetRequests, 2792 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2024-12-02 14:37:18,812 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 13 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 14:37:18,812 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 113 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 14:37:18,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-12-02 14:37:18,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2024-12-02 14:37:18,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 125 states have (on average 1.136) internal successors, (142), 121 states have internal predecessors, (142), 31 states have call successors, (31), 20 states have call predecessors, (31), 25 states have return successors, (111), 40 states have call predecessors, (111), 31 states have call successors, (111) [2024-12-02 14:37:18,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 284 transitions. [2024-12-02 14:37:18,824 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 284 transitions. Word has length 1399 [2024-12-02 14:37:18,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:37:18,825 INFO L471 AbstractCegarLoop]: Abstraction has 182 states and 284 transitions. [2024-12-02 14:37:18,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2024-12-02 14:37:18,825 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 284 transitions. [2024-12-02 14:37:18,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1687 [2024-12-02 14:37:18,847 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:37:18,847 INFO L218 NwaCegarLoop]: trace histogram [125, 125, 122, 122, 102, 98, 62, 62, 62, 62, 62, 62, 62, 61, 61, 61, 61, 61, 61, 61, 41, 36, 24, 23, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:37:18,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-12-02 14:37:19,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-12-02 14:37:19,048 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 14:37:19,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:37:19,048 INFO L85 PathProgramCache]: Analyzing trace with hash 754426269, now seen corresponding path program 10 times [2024-12-02 14:37:19,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:37:19,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928340802] [2024-12-02 14:37:19,049 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 14:37:19,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:37:19,243 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 14:37:19,244 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:37:21,137 INFO L134 CoverageAnalysis]: Checked inductivity of 85312 backedges. 1035 proven. 5630 refuted. 0 times theorem prover too weak. 78647 trivial. 0 not checked. [2024-12-02 14:37:21,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:37:21,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928340802] [2024-12-02 14:37:21,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928340802] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:37:21,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585761962] [2024-12-02 14:37:21,138 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 14:37:21,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:37:21,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:37:21,139 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:37:21,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-12-02 14:37:21,592 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 14:37:21,592 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:37:21,600 INFO L256 TraceCheckSpWp]: Trace formula consists of 2998 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-12-02 14:37:21,612 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:37:21,702 INFO L134 CoverageAnalysis]: Checked inductivity of 85312 backedges. 14534 proven. 176 refuted. 0 times theorem prover too weak. 70602 trivial. 0 not checked. [2024-12-02 14:37:21,702 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:37:26,995 INFO L134 CoverageAnalysis]: Checked inductivity of 85312 backedges. 1032 proven. 6078 refuted. 0 times theorem prover too weak. 78202 trivial. 0 not checked. [2024-12-02 14:37:26,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585761962] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:37:26,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:37:26,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 19] total 26 [2024-12-02 14:37:26,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135463572] [2024-12-02 14:37:26,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:37:26,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-12-02 14:37:26,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:37:26,997 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-12-02 14:37:26,997 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2024-12-02 14:37:26,998 INFO L87 Difference]: Start difference. First operand 182 states and 284 transitions. Second operand has 26 states, 26 states have (on average 3.8461538461538463) internal successors, (100), 26 states have internal predecessors, (100), 20 states have call successors, (30), 2 states have call predecessors, (30), 10 states have return successors, (35), 10 states have call predecessors, (35), 20 states have call successors, (35) [2024-12-02 14:37:27,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:37:27,402 INFO L93 Difference]: Finished difference Result 368 states and 650 transitions. [2024-12-02 14:37:27,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-12-02 14:37:27,403 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.8461538461538463) internal successors, (100), 26 states have internal predecessors, (100), 20 states have call successors, (30), 2 states have call predecessors, (30), 10 states have return successors, (35), 10 states have call predecessors, (35), 20 states have call successors, (35) Word has length 1686 [2024-12-02 14:37:27,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:37:27,405 INFO L225 Difference]: With dead ends: 368 [2024-12-02 14:37:27,405 INFO L226 Difference]: Without dead ends: 183 [2024-12-02 14:37:27,406 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3406 GetRequests, 3356 SyntacticMatches, 9 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=305, Invalid=1501, Unknown=0, NotChecked=0, Total=1806 [2024-12-02 14:37:27,407 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 56 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 14:37:27,407 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 362 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 14:37:27,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-12-02 14:37:27,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 173. [2024-12-02 14:37:27,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 119 states have (on average 1.1008403361344539) internal successors, (131), 116 states have internal predecessors, (131), 30 states have call successors, (30), 19 states have call predecessors, (30), 23 states have return successors, (106), 37 states have call predecessors, (106), 30 states have call successors, (106) [2024-12-02 14:37:27,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 267 transitions. [2024-12-02 14:37:27,420 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 267 transitions. Word has length 1686 [2024-12-02 14:37:27,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:37:27,420 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 267 transitions. [2024-12-02 14:37:27,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.8461538461538463) internal successors, (100), 26 states have internal predecessors, (100), 20 states have call successors, (30), 2 states have call predecessors, (30), 10 states have return successors, (35), 10 states have call predecessors, (35), 20 states have call successors, (35) [2024-12-02 14:37:27,420 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 267 transitions. [2024-12-02 14:37:27,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1747 [2024-12-02 14:37:27,435 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:37:27,435 INFO L218 NwaCegarLoop]: trace histogram [131, 131, 122, 122, 122, 102, 65, 65, 65, 65, 65, 65, 65, 61, 61, 61, 61, 61, 61, 61, 61, 37, 20, 9, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:37:27,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-12-02 14:37:27,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-12-02 14:37:27,636 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 14:37:27,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:37:27,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1013663934, now seen corresponding path program 11 times [2024-12-02 14:37:27,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:37:27,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106863020] [2024-12-02 14:37:27,637 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 14:37:27,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:37:27,678 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-12-02 14:37:27,679 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:37:27,831 INFO L134 CoverageAnalysis]: Checked inductivity of 91756 backedges. 1436 proven. 4508 refuted. 0 times theorem prover too weak. 85812 trivial. 0 not checked. [2024-12-02 14:37:27,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:37:27,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106863020] [2024-12-02 14:37:27,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106863020] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:37:27,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319224529] [2024-12-02 14:37:27,832 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 14:37:27,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:37:27,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:37:27,833 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:37:27,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-12-02 14:37:28,168 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-12-02 14:37:28,168 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:37:28,170 INFO L256 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-12-02 14:37:28,180 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:37:28,239 INFO L134 CoverageAnalysis]: Checked inductivity of 91756 backedges. 23437 proven. 32 refuted. 0 times theorem prover too weak. 68287 trivial. 0 not checked. [2024-12-02 14:37:28,239 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:37:32,464 INFO L134 CoverageAnalysis]: Checked inductivity of 91756 backedges. 1434 proven. 4510 refuted. 0 times theorem prover too weak. 85812 trivial. 0 not checked. [2024-12-02 14:37:32,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319224529] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:37:32,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:37:32,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 18 [2024-12-02 14:37:32,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005307366] [2024-12-02 14:37:32,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:37:32,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-12-02 14:37:32,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:37:32,466 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-12-02 14:37:32,466 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-12-02 14:37:32,466 INFO L87 Difference]: Start difference. First operand 173 states and 267 transitions. Second operand has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 11 states have call successors, (22), 2 states have call predecessors, (22), 7 states have return successors, (26), 8 states have call predecessors, (26), 11 states have call successors, (26) [2024-12-02 14:37:32,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:37:32,693 INFO L93 Difference]: Finished difference Result 348 states and 590 transitions. [2024-12-02 14:37:32,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-12-02 14:37:32,694 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 11 states have call successors, (22), 2 states have call predecessors, (22), 7 states have return successors, (26), 8 states have call predecessors, (26), 11 states have call successors, (26) Word has length 1746 [2024-12-02 14:37:32,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:37:32,695 INFO L225 Difference]: With dead ends: 348 [2024-12-02 14:37:32,696 INFO L226 Difference]: Without dead ends: 181 [2024-12-02 14:37:32,697 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3513 GetRequests, 3481 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2024-12-02 14:37:32,697 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 56 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 14:37:32,697 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 220 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:37:32,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-12-02 14:37:32,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 170. [2024-12-02 14:37:32,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 116 states have (on average 1.0948275862068966) internal successors, (127), 114 states have internal predecessors, (127), 30 states have call successors, (30), 18 states have call predecessors, (30), 23 states have return successors, (103), 37 states have call predecessors, (103), 30 states have call successors, (103) [2024-12-02 14:37:32,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 260 transitions. [2024-12-02 14:37:32,718 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 260 transitions. Word has length 1746 [2024-12-02 14:37:32,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:37:32,719 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 260 transitions. [2024-12-02 14:37:32,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 11 states have call successors, (22), 2 states have call predecessors, (22), 7 states have return successors, (26), 8 states have call predecessors, (26), 11 states have call successors, (26) [2024-12-02 14:37:32,719 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 260 transitions. [2024-12-02 14:37:32,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1417 [2024-12-02 14:37:32,734 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:37:32,735 INFO L218 NwaCegarLoop]: trace histogram [104, 104, 103, 103, 87, 83, 52, 52, 52, 52, 52, 52, 52, 51, 51, 51, 51, 51, 51, 51, 35, 32, 21, 16, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:37:32,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-12-02 14:37:32,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:37:32,935 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 14:37:32,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:37:32,937 INFO L85 PathProgramCache]: Analyzing trace with hash 860357219, now seen corresponding path program 12 times [2024-12-02 14:37:32,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:37:32,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846751557] [2024-12-02 14:37:32,937 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 14:37:32,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:37:32,970 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-12-02 14:37:32,970 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:37:33,073 INFO L134 CoverageAnalysis]: Checked inductivity of 59984 backedges. 792 proven. 2855 refuted. 0 times theorem prover too weak. 56337 trivial. 0 not checked. [2024-12-02 14:37:33,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:37:33,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846751557] [2024-12-02 14:37:33,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846751557] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:37:33,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439011092] [2024-12-02 14:37:33,074 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 14:37:33,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:37:33,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:37:33,075 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:37:33,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-12-02 14:37:33,339 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-12-02 14:37:33,339 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:37:33,341 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-02 14:37:33,353 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:37:33,388 INFO L134 CoverageAnalysis]: Checked inductivity of 59984 backedges. 8386 proven. 4 refuted. 0 times theorem prover too weak. 51594 trivial. 0 not checked. [2024-12-02 14:37:33,388 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:37:36,232 INFO L134 CoverageAnalysis]: Checked inductivity of 59984 backedges. 774 proven. 2638 refuted. 0 times theorem prover too weak. 56572 trivial. 0 not checked. [2024-12-02 14:37:36,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439011092] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:37:36,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:37:36,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 13 [2024-12-02 14:37:36,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237986348] [2024-12-02 14:37:36,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:37:36,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-12-02 14:37:36,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:37:36,234 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-12-02 14:37:36,235 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-12-02 14:37:36,235 INFO L87 Difference]: Start difference. First operand 170 states and 260 transitions. Second operand has 13 states, 12 states have (on average 4.583333333333333) internal successors, (55), 13 states have internal predecessors, (55), 5 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) [2024-12-02 14:37:36,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:37:36,357 INFO L93 Difference]: Finished difference Result 333 states and 551 transitions. [2024-12-02 14:37:36,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 14:37:36,357 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.583333333333333) internal successors, (55), 13 states have internal predecessors, (55), 5 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) Word has length 1416 [2024-12-02 14:37:36,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:37:36,359 INFO L225 Difference]: With dead ends: 333 [2024-12-02 14:37:36,359 INFO L226 Difference]: Without dead ends: 172 [2024-12-02 14:37:36,361 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2847 GetRequests, 2828 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2024-12-02 14:37:36,361 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 39 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 14:37:36,362 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 101 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:37:36,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-12-02 14:37:36,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 168. [2024-12-02 14:37:36,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 117 states have (on average 1.0769230769230769) internal successors, (126), 112 states have internal predecessors, (126), 29 states have call successors, (29), 21 states have call predecessors, (29), 21 states have return successors, (94), 34 states have call predecessors, (94), 29 states have call successors, (94) [2024-12-02 14:37:36,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 249 transitions. [2024-12-02 14:37:36,390 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 249 transitions. Word has length 1416 [2024-12-02 14:37:36,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:37:36,391 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 249 transitions. [2024-12-02 14:37:36,391 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.583333333333333) internal successors, (55), 13 states have internal predecessors, (55), 5 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) [2024-12-02 14:37:36,391 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 249 transitions. [2024-12-02 14:37:36,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2040 [2024-12-02 14:37:36,455 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:37:36,455 INFO L218 NwaCegarLoop]: trace histogram [153, 153, 146, 146, 121, 120, 76, 76, 76, 76, 76, 76, 76, 73, 73, 73, 73, 73, 73, 73, 48, 44, 32, 26, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:37:36,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-12-02 14:37:36,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:37:36,656 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 14:37:36,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:37:36,656 INFO L85 PathProgramCache]: Analyzing trace with hash 334575499, now seen corresponding path program 13 times [2024-12-02 14:37:36,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:37:36,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446115318] [2024-12-02 14:37:36,657 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 14:37:36,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:37:36,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:37:41,811 INFO L134 CoverageAnalysis]: Checked inductivity of 125164 backedges. 2355 proven. 8401 refuted. 0 times theorem prover too weak. 114408 trivial. 0 not checked. [2024-12-02 14:37:41,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:37:41,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446115318] [2024-12-02 14:37:41,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446115318] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:37:41,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075951261] [2024-12-02 14:37:41,812 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 14:37:41,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:37:41,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:37:41,814 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:37:41,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-12-02 14:37:42,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:37:42,407 INFO L256 TraceCheckSpWp]: Trace formula consists of 4547 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-12-02 14:37:42,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:37:42,646 INFO L134 CoverageAnalysis]: Checked inductivity of 125164 backedges. 886 proven. 7204 refuted. 0 times theorem prover too weak. 117074 trivial. 0 not checked. [2024-12-02 14:37:42,646 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:37:50,465 INFO L134 CoverageAnalysis]: Checked inductivity of 125164 backedges. 886 proven. 7260 refuted. 0 times theorem prover too weak. 117018 trivial. 0 not checked. [2024-12-02 14:37:50,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075951261] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:37:50,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:37:50,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 15, 23] total 40 [2024-12-02 14:37:50,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081777973] [2024-12-02 14:37:50,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:37:50,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-12-02 14:37:50,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:37:50,468 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-12-02 14:37:50,468 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1393, Unknown=0, NotChecked=0, Total=1560 [2024-12-02 14:37:50,471 INFO L87 Difference]: Start difference. First operand 168 states and 249 transitions. Second operand has 40 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 40 states have internal predecessors, (127), 34 states have call successors, (40), 1 states have call predecessors, (40), 20 states have return successors, (54), 21 states have call predecessors, (54), 34 states have call successors, (54) [2024-12-02 14:37:52,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:37:52,017 INFO L93 Difference]: Finished difference Result 508 states and 1101 transitions. [2024-12-02 14:37:52,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-12-02 14:37:52,018 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 40 states have internal predecessors, (127), 34 states have call successors, (40), 1 states have call predecessors, (40), 20 states have return successors, (54), 21 states have call predecessors, (54), 34 states have call successors, (54) Word has length 2039 [2024-12-02 14:37:52,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:37:52,022 INFO L225 Difference]: With dead ends: 508 [2024-12-02 14:37:52,022 INFO L226 Difference]: Without dead ends: 317 [2024-12-02 14:37:52,024 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4153 GetRequests, 4057 SyntacticMatches, 10 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2114 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1015, Invalid=6641, Unknown=0, NotChecked=0, Total=7656 [2024-12-02 14:37:52,025 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 211 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 1728 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 1995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 1728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-12-02 14:37:52,025 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 933 Invalid, 1995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 1728 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-12-02 14:37:52,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2024-12-02 14:37:52,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 251. [2024-12-02 14:37:52,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 174 states have (on average 1.0517241379310345) internal successors, (183), 169 states have internal predecessors, (183), 48 states have call successors, (48), 33 states have call predecessors, (48), 28 states have return successors, (164), 48 states have call predecessors, (164), 48 states have call successors, (164) [2024-12-02 14:37:52,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 395 transitions. [2024-12-02 14:37:52,047 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 395 transitions. Word has length 2039 [2024-12-02 14:37:52,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:37:52,047 INFO L471 AbstractCegarLoop]: Abstraction has 251 states and 395 transitions. [2024-12-02 14:37:52,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 40 states have internal predecessors, (127), 34 states have call successors, (40), 1 states have call predecessors, (40), 20 states have return successors, (54), 21 states have call predecessors, (54), 34 states have call successors, (54) [2024-12-02 14:37:52,047 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 395 transitions. [2024-12-02 14:37:52,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3309 [2024-12-02 14:37:52,093 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:37:52,094 INFO L218 NwaCegarLoop]: trace histogram [243, 243, 242, 242, 199, 195, 121, 121, 121, 121, 121, 121, 121, 121, 121, 121, 121, 121, 121, 121, 78, 74, 48, 43, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:37:52,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-12-02 14:37:52,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:37:52,294 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 14:37:52,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:37:52,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1127161430, now seen corresponding path program 14 times [2024-12-02 14:37:52,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:37:52,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881485112] [2024-12-02 14:37:52,296 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:37:52,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:37:52,776 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:37:52,776 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:38:01,473 INFO L134 CoverageAnalysis]: Checked inductivity of 330952 backedges. 1658 proven. 10310 refuted. 0 times theorem prover too weak. 318984 trivial. 0 not checked. [2024-12-02 14:38:01,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:38:01,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881485112] [2024-12-02 14:38:01,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881485112] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:38:01,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684444894] [2024-12-02 14:38:01,473 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:38:01,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:38:01,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:38:01,475 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:38:01,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-12-02 14:38:02,425 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:38:02,425 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:38:02,447 INFO L256 TraceCheckSpWp]: Trace formula consists of 7364 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-12-02 14:38:02,467 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:38:02,693 INFO L134 CoverageAnalysis]: Checked inductivity of 330952 backedges. 1532 proven. 13143 refuted. 0 times theorem prover too weak. 316277 trivial. 0 not checked. [2024-12-02 14:38:02,693 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:38:14,323 INFO L134 CoverageAnalysis]: Checked inductivity of 330952 backedges. 1532 proven. 13213 refuted. 0 times theorem prover too weak. 316207 trivial. 0 not checked. [2024-12-02 14:38:14,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684444894] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:38:14,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:38:14,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 25] total 34 [2024-12-02 14:38:14,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550978226] [2024-12-02 14:38:14,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:38:14,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-12-02 14:38:14,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:38:14,326 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-12-02 14:38:14,326 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2024-12-02 14:38:14,327 INFO L87 Difference]: Start difference. First operand 251 states and 395 transitions. Second operand has 34 states, 32 states have (on average 3.46875) internal successors, (111), 34 states have internal predecessors, (111), 30 states have call successors, (34), 1 states have call predecessors, (34), 18 states have return successors, (49), 19 states have call predecessors, (49), 30 states have call successors, (49) [2024-12-02 14:38:14,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:38:14,734 INFO L93 Difference]: Finished difference Result 293 states and 532 transitions. [2024-12-02 14:38:14,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-12-02 14:38:14,734 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 3.46875) internal successors, (111), 34 states have internal predecessors, (111), 30 states have call successors, (34), 1 states have call predecessors, (34), 18 states have return successors, (49), 19 states have call predecessors, (49), 30 states have call successors, (49) Word has length 3308 [2024-12-02 14:38:14,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:38:14,739 INFO L225 Difference]: With dead ends: 293 [2024-12-02 14:38:14,739 INFO L226 Difference]: Without dead ends: 289 [2024-12-02 14:38:14,740 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6651 GetRequests, 6592 SyntacticMatches, 11 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=453, Invalid=1997, Unknown=0, NotChecked=0, Total=2450 [2024-12-02 14:38:14,741 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 72 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 14:38:14,741 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 293 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 14:38:14,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2024-12-02 14:38:14,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 281. [2024-12-02 14:38:14,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 192 states have (on average 1.046875) internal successors, (201), 187 states have internal predecessors, (201), 54 states have call successors, (54), 33 states have call predecessors, (54), 34 states have return successors, (235), 60 states have call predecessors, (235), 54 states have call successors, (235) [2024-12-02 14:38:14,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 490 transitions. [2024-12-02 14:38:14,779 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 490 transitions. Word has length 3308 [2024-12-02 14:38:14,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:38:14,780 INFO L471 AbstractCegarLoop]: Abstraction has 281 states and 490 transitions. [2024-12-02 14:38:14,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 3.46875) internal successors, (111), 34 states have internal predecessors, (111), 30 states have call successors, (34), 1 states have call predecessors, (34), 18 states have return successors, (49), 19 states have call predecessors, (49), 30 states have call successors, (49) [2024-12-02 14:38:14,780 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 490 transitions. [2024-12-02 14:38:14,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4806 [2024-12-02 14:38:14,928 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:38:14,929 INFO L218 NwaCegarLoop]: trace histogram [353, 353, 352, 352, 287, 284, 176, 176, 176, 176, 176, 176, 176, 176, 176, 176, 176, 176, 176, 176, 111, 108, 68, 66, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:38:14,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-12-02 14:38:15,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:38:15,129 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 14:38:15,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:38:15,131 INFO L85 PathProgramCache]: Analyzing trace with hash 941228220, now seen corresponding path program 15 times [2024-12-02 14:38:15,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:38:15,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017517685] [2024-12-02 14:38:15,131 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:38:15,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:38:15,286 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2024-12-02 14:38:15,286 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:38:16,093 INFO L134 CoverageAnalysis]: Checked inductivity of 700043 backedges. 2180 proven. 21283 refuted. 0 times theorem prover too weak. 676580 trivial. 0 not checked. [2024-12-02 14:38:16,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:38:16,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017517685] [2024-12-02 14:38:16,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017517685] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:38:16,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441263461] [2024-12-02 14:38:16,094 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:38:16,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:38:16,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:38:16,095 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:38:16,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-12-02 14:38:16,877 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2024-12-02 14:38:16,877 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:38:16,884 INFO L256 TraceCheckSpWp]: Trace formula consists of 1573 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-12-02 14:38:16,909 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:38:17,088 INFO L134 CoverageAnalysis]: Checked inductivity of 700043 backedges. 2180 proven. 21283 refuted. 0 times theorem prover too weak. 676580 trivial. 0 not checked. [2024-12-02 14:38:17,088 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:38:34,276 INFO L134 CoverageAnalysis]: Checked inductivity of 700043 backedges. 2180 proven. 21368 refuted. 0 times theorem prover too weak. 676495 trivial. 0 not checked. [2024-12-02 14:38:34,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441263461] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:38:34,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:38:34,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 27] total 30 [2024-12-02 14:38:34,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390475773] [2024-12-02 14:38:34,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:38:34,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-12-02 14:38:34,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:38:34,281 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-12-02 14:38:34,281 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2024-12-02 14:38:34,281 INFO L87 Difference]: Start difference. First operand 281 states and 490 transitions. Second operand has 30 states, 28 states have (on average 3.5357142857142856) internal successors, (99), 30 states have internal predecessors, (99), 27 states have call successors, (30), 1 states have call predecessors, (30), 13 states have return successors, (39), 13 states have call predecessors, (39), 27 states have call successors, (39) [2024-12-02 14:38:34,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:38:34,597 INFO L93 Difference]: Finished difference Result 314 states and 620 transitions. [2024-12-02 14:38:34,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-12-02 14:38:34,597 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 3.5357142857142856) internal successors, (99), 30 states have internal predecessors, (99), 27 states have call successors, (30), 1 states have call predecessors, (30), 13 states have return successors, (39), 13 states have call predecessors, (39), 27 states have call successors, (39) Word has length 4805 [2024-12-02 14:38:34,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:38:34,604 INFO L225 Difference]: With dead ends: 314 [2024-12-02 14:38:34,604 INFO L226 Difference]: Without dead ends: 310 [2024-12-02 14:38:34,605 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9646 GetRequests, 9595 SyntacticMatches, 12 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=1338, Unknown=0, NotChecked=0, Total=1640 [2024-12-02 14:38:34,605 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 120 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 14:38:34,605 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 253 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 14:38:34,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2024-12-02 14:38:34,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 274. [2024-12-02 14:38:34,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 188 states have (on average 1.047872340425532) internal successors, (197), 183 states have internal predecessors, (197), 52 states have call successors, (52), 33 states have call predecessors, (52), 33 states have return successors, (222), 57 states have call predecessors, (222), 52 states have call successors, (222) [2024-12-02 14:38:34,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 471 transitions. [2024-12-02 14:38:34,629 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 471 transitions. Word has length 4805 [2024-12-02 14:38:34,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:38:34,630 INFO L471 AbstractCegarLoop]: Abstraction has 274 states and 471 transitions. [2024-12-02 14:38:34,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 3.5357142857142856) internal successors, (99), 30 states have internal predecessors, (99), 27 states have call successors, (30), 1 states have call predecessors, (30), 13 states have return successors, (39), 13 states have call predecessors, (39), 27 states have call successors, (39) [2024-12-02 14:38:34,630 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 471 transitions. [2024-12-02 14:38:34,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6306 [2024-12-02 14:38:34,781 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:38:34,782 INFO L218 NwaCegarLoop]: trace histogram [478, 478, 447, 447, 382, 369, 239, 239, 239, 239, 239, 239, 239, 223, 223, 223, 223, 223, 223, 223, 159, 130, 96, 78, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:38:34,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-12-02 14:38:34,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:38:34,982 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 14:38:34,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:38:34,983 INFO L85 PathProgramCache]: Analyzing trace with hash -333488922, now seen corresponding path program 16 times [2024-12-02 14:38:34,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:38:34,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079388380] [2024-12-02 14:38:34,983 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 14:38:34,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:38:36,427 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 14:38:36,427 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:39:05,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1208179 backedges. 4312 proven. 35042 refuted. 0 times theorem prover too weak. 1168825 trivial. 0 not checked. [2024-12-02 14:39:05,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:39:05,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079388380] [2024-12-02 14:39:05,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079388380] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:39:05,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369460563] [2024-12-02 14:39:05,381 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 14:39:05,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:39:05,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:39:05,382 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:39:05,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-12-02 14:39:06,962 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 14:39:06,963 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:39:06,997 INFO L256 TraceCheckSpWp]: Trace formula consists of 11219 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-12-02 14:39:07,035 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:39:07,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1208179 backedges. 124046 proven. 792 refuted. 0 times theorem prover too weak. 1083341 trivial. 0 not checked. [2024-12-02 14:39:07,224 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:39:28,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1208179 backedges. 4356 proven. 36698 refuted. 0 times theorem prover too weak. 1167125 trivial. 0 not checked. [2024-12-02 14:39:28,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369460563] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:39:28,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:39:28,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 27] total 34 [2024-12-02 14:39:28,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546364181] [2024-12-02 14:39:28,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:39:28,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-12-02 14:39:28,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:39:28,809 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-12-02 14:39:28,809 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2024-12-02 14:39:28,810 INFO L87 Difference]: Start difference. First operand 274 states and 471 transitions. Second operand has 34 states, 34 states have (on average 3.6470588235294117) internal successors, (124), 34 states have internal predecessors, (124), 28 states have call successors, (38), 2 states have call predecessors, (38), 14 states have return successors, (47), 14 states have call predecessors, (47), 28 states have call successors, (47) [2024-12-02 14:39:29,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:39:29,620 INFO L93 Difference]: Finished difference Result 573 states and 1086 transitions. [2024-12-02 14:39:29,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-12-02 14:39:29,620 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.6470588235294117) internal successors, (124), 34 states have internal predecessors, (124), 28 states have call successors, (38), 2 states have call predecessors, (38), 14 states have return successors, (47), 14 states have call predecessors, (47), 28 states have call successors, (47) Word has length 6305 [2024-12-02 14:39:29,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:39:29,624 INFO L225 Difference]: With dead ends: 573 [2024-12-02 14:39:29,624 INFO L226 Difference]: Without dead ends: 306 [2024-12-02 14:39:29,626 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12668 GetRequests, 12590 SyntacticMatches, 13 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=677, Invalid=3745, Unknown=0, NotChecked=0, Total=4422 [2024-12-02 14:39:29,626 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 162 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-12-02 14:39:29,626 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 535 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-12-02 14:39:29,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2024-12-02 14:39:29,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 273. [2024-12-02 14:39:29,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 190 states have (on average 1.0473684210526315) internal successors, (199), 185 states have internal predecessors, (199), 53 states have call successors, (53), 37 states have call predecessors, (53), 29 states have return successors, (188), 50 states have call predecessors, (188), 53 states have call successors, (188) [2024-12-02 14:39:29,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 440 transitions. [2024-12-02 14:39:29,647 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 440 transitions. Word has length 6305 [2024-12-02 14:39:29,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:39:29,647 INFO L471 AbstractCegarLoop]: Abstraction has 273 states and 440 transitions. [2024-12-02 14:39:29,647 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.6470588235294117) internal successors, (124), 34 states have internal predecessors, (124), 28 states have call successors, (38), 2 states have call predecessors, (38), 14 states have return successors, (47), 14 states have call predecessors, (47), 28 states have call successors, (47) [2024-12-02 14:39:29,647 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 440 transitions. [2024-12-02 14:39:29,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5594 [2024-12-02 14:39:29,803 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:39:29,804 INFO L218 NwaCegarLoop]: trace histogram [422, 422, 399, 399, 333, 330, 211, 211, 211, 211, 211, 211, 211, 199, 199, 199, 199, 199, 199, 199, 134, 119, 89, 69, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:39:29,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-12-02 14:39:30,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:39:30,004 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 14:39:30,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:39:30,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1459498712, now seen corresponding path program 17 times [2024-12-02 14:39:30,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:39:30,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310822043] [2024-12-02 14:39:30,007 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 14:39:30,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:39:30,122 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2024-12-02 14:39:30,123 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:39:30,481 INFO L134 CoverageAnalysis]: Checked inductivity of 949915 backedges. 5439 proven. 23292 refuted. 0 times theorem prover too weak. 921184 trivial. 0 not checked. [2024-12-02 14:39:30,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:39:30,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310822043] [2024-12-02 14:39:30,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310822043] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:39:30,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649467969] [2024-12-02 14:39:30,482 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 14:39:30,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:39:30,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:39:30,484 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:39:30,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-12-02 14:39:31,301 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2024-12-02 14:39:31,301 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:39:31,307 INFO L256 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-12-02 14:39:31,334 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:39:31,478 INFO L134 CoverageAnalysis]: Checked inductivity of 949915 backedges. 214204 proven. 359 refuted. 0 times theorem prover too weak. 735352 trivial. 0 not checked. [2024-12-02 14:39:31,478 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:39:48,572 INFO L134 CoverageAnalysis]: Checked inductivity of 949915 backedges. 5441 proven. 23302 refuted. 0 times theorem prover too weak. 921172 trivial. 0 not checked. [2024-12-02 14:39:48,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649467969] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:39:48,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:39:48,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 21] total 25 [2024-12-02 14:39:48,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867455884] [2024-12-02 14:39:48,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:39:48,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-12-02 14:39:48,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:39:48,576 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-12-02 14:39:48,576 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2024-12-02 14:39:48,577 INFO L87 Difference]: Start difference. First operand 273 states and 440 transitions. Second operand has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 states have internal predecessors, (103), 19 states have call successors, (32), 2 states have call predecessors, (32), 11 states have return successors, (39), 14 states have call predecessors, (39), 19 states have call successors, (39) [2024-12-02 14:39:49,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:39:49,059 INFO L93 Difference]: Finished difference Result 559 states and 977 transitions. [2024-12-02 14:39:49,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-12-02 14:39:49,060 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 states have internal predecessors, (103), 19 states have call successors, (32), 2 states have call predecessors, (32), 11 states have return successors, (39), 14 states have call predecessors, (39), 19 states have call successors, (39) Word has length 5593 [2024-12-02 14:39:49,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:39:49,065 INFO L225 Difference]: With dead ends: 559 [2024-12-02 14:39:49,065 INFO L226 Difference]: Without dead ends: 297 [2024-12-02 14:39:49,067 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11220 GetRequests, 11172 SyntacticMatches, 10 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=260, Invalid=1300, Unknown=0, NotChecked=0, Total=1560 [2024-12-02 14:39:49,068 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 47 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 14:39:49,068 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 594 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 14:39:49,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2024-12-02 14:39:49,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 259. [2024-12-02 14:39:49,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 181 states have (on average 1.0497237569060773) internal successors, (190), 176 states have internal predecessors, (190), 50 states have call successors, (50), 36 states have call predecessors, (50), 27 states have return successors, (156), 46 states have call predecessors, (156), 50 states have call successors, (156) [2024-12-02 14:39:49,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 396 transitions. [2024-12-02 14:39:49,089 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 396 transitions. Word has length 5593 [2024-12-02 14:39:49,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:39:49,089 INFO L471 AbstractCegarLoop]: Abstraction has 259 states and 396 transitions. [2024-12-02 14:39:49,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 states have internal predecessors, (103), 19 states have call successors, (32), 2 states have call predecessors, (32), 11 states have return successors, (39), 14 states have call predecessors, (39), 19 states have call successors, (39) [2024-12-02 14:39:49,090 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 396 transitions. [2024-12-02 14:39:49,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9694 [2024-12-02 14:39:49,484 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:39:49,486 INFO L218 NwaCegarLoop]: trace histogram [714, 714, 709, 709, 577, 574, 357, 357, 357, 357, 357, 357, 357, 354, 354, 354, 354, 354, 354, 354, 220, 220, 140, 132, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:39:49,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-12-02 14:39:49,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-12-02 14:39:49,686 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 14:39:49,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:39:49,688 INFO L85 PathProgramCache]: Analyzing trace with hash 366436329, now seen corresponding path program 18 times [2024-12-02 14:39:49,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:39:49,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981144311] [2024-12-02 14:39:49,689 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 14:39:49,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:39:49,897 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2024-12-02 14:39:49,897 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:39:50,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2856843 backedges. 7596 proven. 48314 refuted. 0 times theorem prover too weak. 2800933 trivial. 0 not checked. [2024-12-02 14:39:50,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:39:50,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981144311] [2024-12-02 14:39:50,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981144311] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:39:50,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951005076] [2024-12-02 14:39:50,827 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 14:39:50,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:39:50,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:39:50,829 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:39:50,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-12-02 14:39:51,902 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2024-12-02 14:39:51,902 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:39:51,911 INFO L256 TraceCheckSpWp]: Trace formula consists of 1115 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-12-02 14:39:51,963 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:39:52,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2856843 backedges. 7590 proven. 48302 refuted. 0 times theorem prover too weak. 2800951 trivial. 0 not checked. [2024-12-02 14:39:52,287 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:40:27,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2856843 backedges. 7598 proven. 48414 refuted. 0 times theorem prover too weak. 2800831 trivial. 0 not checked. [2024-12-02 14:40:27,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951005076] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:40:27,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:40:27,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 31] total 35 [2024-12-02 14:40:27,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565682450] [2024-12-02 14:40:27,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:40:27,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-12-02 14:40:27,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:40:27,756 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-12-02 14:40:27,756 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2024-12-02 14:40:27,756 INFO L87 Difference]: Start difference. First operand 259 states and 396 transitions. Second operand has 35 states, 33 states have (on average 3.484848484848485) internal successors, (115), 35 states have internal predecessors, (115), 31 states have call successors, (36), 1 states have call predecessors, (36), 15 states have return successors, (47), 17 states have call predecessors, (47), 31 states have call successors, (47) [2024-12-02 14:40:28,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:40:28,136 INFO L93 Difference]: Finished difference Result 317 states and 578 transitions. [2024-12-02 14:40:28,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-12-02 14:40:28,136 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 3.484848484848485) internal successors, (115), 35 states have internal predecessors, (115), 31 states have call successors, (36), 1 states have call predecessors, (36), 15 states have return successors, (47), 17 states have call predecessors, (47), 31 states have call successors, (47) Word has length 9693 [2024-12-02 14:40:28,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:40:28,144 INFO L225 Difference]: With dead ends: 317 [2024-12-02 14:40:28,144 INFO L226 Difference]: Without dead ends: 313 [2024-12-02 14:40:28,145 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 19429 GetRequests, 19368 SyntacticMatches, 14 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=433, Invalid=1919, Unknown=0, NotChecked=0, Total=2352 [2024-12-02 14:40:28,145 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 125 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 14:40:28,145 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 309 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 14:40:28,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2024-12-02 14:40:28,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 264. [2024-12-02 14:40:28,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 185 states have (on average 1.0486486486486486) internal successors, (194), 180 states have internal predecessors, (194), 52 states have call successors, (52), 38 states have call predecessors, (52), 26 states have return successors, (165), 45 states have call predecessors, (165), 52 states have call successors, (165) [2024-12-02 14:40:28,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 411 transitions. [2024-12-02 14:40:28,167 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 411 transitions. Word has length 9693 [2024-12-02 14:40:28,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:40:28,168 INFO L471 AbstractCegarLoop]: Abstraction has 264 states and 411 transitions. [2024-12-02 14:40:28,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 3.484848484848485) internal successors, (115), 35 states have internal predecessors, (115), 31 states have call successors, (36), 1 states have call predecessors, (36), 15 states have return successors, (47), 17 states have call predecessors, (47), 31 states have call successors, (47) [2024-12-02 14:40:28,169 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 411 transitions. [2024-12-02 14:40:31,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23288 [2024-12-02 14:40:31,175 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:40:31,178 INFO L218 NwaCegarLoop]: trace histogram [1726, 1726, 1693, 1693, 1393, 1376, 863, 863, 863, 863, 863, 863, 863, 846, 846, 846, 846, 846, 846, 846, 530, 530, 350, 300, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:40:31,186 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-12-02 14:40:31,378 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-12-02 14:40:31,379 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 14:40:31,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:40:31,382 INFO L85 PathProgramCache]: Analyzing trace with hash 570982523, now seen corresponding path program 19 times [2024-12-02 14:40:31,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:40:31,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475781321] [2024-12-02 14:40:31,383 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 14:40:31,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:40:56,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:50:11,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16516892 backedges. 18259 proven. 146931 refuted. 0 times theorem prover too weak. 16351702 trivial. 0 not checked. [2024-12-02 14:50:11,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:50:11,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475781321] [2024-12-02 14:50:11,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475781321] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:50:11,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802474508] [2024-12-02 14:50:11,880 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 14:50:11,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:50:11,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:50:11,882 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:50:11,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbed6b39-cc91-4960-b0de-56db5509787e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-12-02 14:50:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:50:19,317 INFO L256 TraceCheckSpWp]: Trace formula consists of 51723 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-12-02 14:50:19,448 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:50:20,366 INFO L134 CoverageAnalysis]: Checked inductivity of 16516892 backedges. 11434 proven. 133452 refuted. 0 times theorem prover too weak. 16372006 trivial. 0 not checked. [2024-12-02 14:50:20,367 INFO L312 TraceCheckSpWp]: Computing backward predicates...