./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem14_label34.c --full-output --architecture 32bit


--------------------------------------------------------------------------------


Checking for ERROR reachability
Using default analysis
Version 0e0057cc
Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label34.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme --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 8ac0e94c7d3c2bd4e595b1edf2fec81e704e99d1974a2a1d5565771855b4544e
--- Real Ultimate output ---
This is Ultimate 0.2.4-dev-0e0057c
[2023-11-26 11:49:19,852 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-26 11:49:19,999 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf
[2023-11-26 11:49:20,007 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-26 11:49:20,008 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-26 11:49:20,055 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-26 11:49:20,057 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-26 11:49:20,058 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-26 11:49:20,059 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2023-11-26 11:49:20,065 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2023-11-26 11:49:20,066 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-26 11:49:20,067 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-26 11:49:20,068 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-26 11:49:20,070 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-26 11:49:20,070 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-26 11:49:20,071 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-26 11:49:20,072 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-26 11:49:20,072 INFO  L153        SettingsManager]:  * sizeof long=4
[2023-11-26 11:49:20,073 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-26 11:49:20,073 INFO  L153        SettingsManager]:  * sizeof POINTER=4
[2023-11-26 11:49:20,074 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-26 11:49:20,075 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-26 11:49:20,075 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-26 11:49:20,076 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-26 11:49:20,076 INFO  L153        SettingsManager]:  * sizeof long double=12
[2023-11-26 11:49:20,077 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-26 11:49:20,078 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-26 11:49:20,078 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-26 11:49:20,079 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-26 11:49:20,080 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2023-11-26 11:49:20,080 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-26 11:49:20,081 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-26 11:49:20,081 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-26 11:49:20,082 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-26 11:49:20,082 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-11-26 11:49:20,082 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-26 11:49:20,083 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-26 11:49:20,083 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2023-11-26 11:49:20,084 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-26 11:49:20,084 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-26 11:49:20,084 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-26 11:49:20,085 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-26 11:49:20,085 INFO  L153        SettingsManager]:  * Looper check in Petri net analysis=SEMANTIC
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
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_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme
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 -> 8ac0e94c7d3c2bd4e595b1edf2fec81e704e99d1974a2a1d5565771855b4544e
[2023-11-26 11:49:20,421 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-26 11:49:20,457 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-26 11:49:20,461 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-26 11:49:20,463 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-26 11:49:20,464 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-26 11:49:20,465 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/eca-rers2012/Problem14_label34.c
[2023-11-26 11:49:24,153 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-26 11:49:24,516 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-26 11:49:24,517 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/sv-benchmarks/c/eca-rers2012/Problem14_label34.c
[2023-11-26 11:49:24,535 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/data/e88224105/6e25807b5ccc4aad824ed9f0cee82f48/FLAG054d217b3
[2023-11-26 11:49:24,566 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/data/e88224105/6e25807b5ccc4aad824ed9f0cee82f48
[2023-11-26 11:49:24,568 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-26 11:49:24,570 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-26 11:49:24,572 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-26 11:49:24,572 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-26 11:49:24,578 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-26 11:49:24,579 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:49:24" (1/1) ...
[2023-11-26 11:49:24,581 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30c2d07a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:24, skipping insertion in model container
[2023-11-26 11:49:24,581 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:49:24" (1/1) ...
[2023-11-26 11:49:24,671 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-26 11:49:24,935 WARN  L240   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_1862a45f-7963-4a88-8ba9-f17ea6332aa6/sv-benchmarks/c/eca-rers2012/Problem14_label34.c[2947,2960]
[2023-11-26 11:49:25,240 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-26 11:49:25,260 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-26 11:49:25,289 WARN  L240   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_1862a45f-7963-4a88-8ba9-f17ea6332aa6/sv-benchmarks/c/eca-rers2012/Problem14_label34.c[2947,2960]
[2023-11-26 11:49:25,601 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-26 11:49:25,629 INFO  L206         MainTranslator]: Completed translation
[2023-11-26 11:49:25,630 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:25 WrapperNode
[2023-11-26 11:49:25,630 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-26 11:49:25,632 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-26 11:49:25,633 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-26 11:49:25,633 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-26 11:49:25,644 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:25" (1/1) ...
[2023-11-26 11:49:25,681 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:25" (1/1) ...
[2023-11-26 11:49:25,797 INFO  L138                Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 859
[2023-11-26 11:49:25,798 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-26 11:49:25,799 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-26 11:49:25,799 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-26 11:49:25,799 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-26 11:49:25,815 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:25" (1/1) ...
[2023-11-26 11:49:25,816 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:25" (1/1) ...
[2023-11-26 11:49:25,826 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:25" (1/1) ...
[2023-11-26 11:49:25,910 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].
[2023-11-26 11:49:25,935 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:25" (1/1) ...
[2023-11-26 11:49:25,935 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:25" (1/1) ...
[2023-11-26 11:49:25,993 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:25" (1/1) ...
[2023-11-26 11:49:26,013 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:25" (1/1) ...
[2023-11-26 11:49:26,047 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:25" (1/1) ...
[2023-11-26 11:49:26,056 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:25" (1/1) ...
[2023-11-26 11:49:26,089 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-26 11:49:26,091 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-26 11:49:26,091 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-26 11:49:26,091 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-26 11:49:26,093 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:25" (1/1) ...
[2023-11-26 11:49:26,100 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-26 11:49:26,115 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/z3
[2023-11-26 11:49:26,139 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null)
[2023-11-26 11:49:26,161 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process
[2023-11-26 11:49:26,193 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-26 11:49:26,193 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#0
[2023-11-26 11:49:26,195 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-26 11:49:26,195 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-26 11:49:26,286 INFO  L241             CfgBuilder]: Building ICFG
[2023-11-26 11:49:26,289 INFO  L267             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-26 11:49:27,953 INFO  L282             CfgBuilder]: Performing block encoding
[2023-11-26 11:49:28,019 INFO  L304             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-26 11:49:28,021 INFO  L309             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-26 11:49:28,021 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:49:28 BoogieIcfgContainer
[2023-11-26 11:49:28,022 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-26 11:49:28,025 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-26 11:49:28,026 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-26 11:49:28,029 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-26 11:49:28,029 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:49:24" (1/3) ...
[2023-11-26 11:49:28,030 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33a5cf38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:49:28, skipping insertion in model container
[2023-11-26 11:49:28,031 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:25" (2/3) ...
[2023-11-26 11:49:28,032 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33a5cf38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:49:28, skipping insertion in model container
[2023-11-26 11:49:28,033 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:49:28" (3/3) ...
[2023-11-26 11:49:28,036 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem14_label34.c
[2023-11-26 11:49:28,056 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-26 11:49:28,056 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-26 11:49:28,129 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-26 11:49:28,138 INFO  L357      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, mHoare=true, 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;@3f632c92, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-11-26 11:49:28,138 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-26 11:49:28,146 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 183 states, 181 states have (on average 1.988950276243094) internal successors, (360), 182 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:28,153 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2023-11-26 11:49:28,153 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:49:28,154 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 11:49:28,156 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:49:28,163 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:49:28,164 INFO  L85        PathProgramCache]: Analyzing trace with hash -1994633330, now seen corresponding path program 1 times
[2023-11-26 11:49:28,174 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:49:28,175 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580494064]
[2023-11-26 11:49:28,175 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:49:28,176 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:49:28,310 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:49:28,427 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-26 11:49:28,428 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:49:28,428 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580494064]
[2023-11-26 11:49:28,429 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580494064] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:49:28,430 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 11:49:28,430 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-26 11:49:28,432 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236838715]
[2023-11-26 11:49:28,434 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:49:28,441 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2023-11-26 11:49:28,442 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:49:28,495 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2023-11-26 11:49:28,496 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2023-11-26 11:49:28,499 INFO  L87              Difference]: Start difference. First operand  has 183 states, 181 states have (on average 1.988950276243094) internal successors, (360), 182 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:28,552 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:49:28,552 INFO  L93              Difference]: Finished difference Result 365 states and 719 transitions.
[2023-11-26 11:49:28,556 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2023-11-26 11:49:28,557 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26
[2023-11-26 11:49:28,558 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:49:28,571 INFO  L225             Difference]: With dead ends: 365
[2023-11-26 11:49:28,571 INFO  L226             Difference]: Without dead ends: 181
[2023-11-26 11:49:28,575 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2023-11-26 11:49:28,580 INFO  L413           NwaCegarLoop]: 295 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-26 11:49:28,581 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 295 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-26 11:49:28,602 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 181 states.
[2023-11-26 11:49:28,629 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181.
[2023-11-26 11:49:28,631 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 181 states, 180 states have (on average 1.6388888888888888) internal successors, (295), 180 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:28,635 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 295 transitions.
[2023-11-26 11:49:28,637 INFO  L78                 Accepts]: Start accepts. Automaton has 181 states and 295 transitions. Word has length 26
[2023-11-26 11:49:28,637 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:49:28,638 INFO  L495      AbstractCegarLoop]: Abstraction has 181 states and 295 transitions.
[2023-11-26 11:49:28,638 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:28,638 INFO  L276                IsEmpty]: Start isEmpty. Operand 181 states and 295 transitions.
[2023-11-26 11:49:28,639 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2023-11-26 11:49:28,639 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:49:28,640 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 11:49:28,640 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-26 11:49:28,640 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:49:28,641 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:49:28,641 INFO  L85        PathProgramCache]: Analyzing trace with hash 880850636, now seen corresponding path program 1 times
[2023-11-26 11:49:28,641 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:49:28,642 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874915448]
[2023-11-26 11:49:28,642 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:49:28,642 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:49:28,672 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:49:28,804 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-26 11:49:28,804 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:49:28,805 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874915448]
[2023-11-26 11:49:28,805 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874915448] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:49:28,805 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 11:49:28,805 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-26 11:49:28,806 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992676416]
[2023-11-26 11:49:28,806 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:49:28,807 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 11:49:28,808 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:49:28,808 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 11:49:28,809 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 11:49:28,809 INFO  L87              Difference]: Start difference. First operand 181 states and 295 transitions. Second operand  has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:29,925 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:49:29,926 INFO  L93              Difference]: Finished difference Result 361 states and 589 transitions.
[2023-11-26 11:49:29,926 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 11:49:29,927 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26
[2023-11-26 11:49:29,927 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:49:29,932 INFO  L225             Difference]: With dead ends: 361
[2023-11-26 11:49:29,932 INFO  L226             Difference]: Without dead ends: 359
[2023-11-26 11:49:29,933 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 11:49:29,935 INFO  L413           NwaCegarLoop]: 6 mSDtfsCounter, 158 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time
[2023-11-26 11:49:29,936 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 10 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time]
[2023-11-26 11:49:29,938 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 359 states.
[2023-11-26 11:49:29,966 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 359.
[2023-11-26 11:49:29,967 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 359 states, 358 states have (on average 1.6396648044692737) internal successors, (587), 358 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:29,972 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 587 transitions.
[2023-11-26 11:49:29,972 INFO  L78                 Accepts]: Start accepts. Automaton has 359 states and 587 transitions. Word has length 26
[2023-11-26 11:49:29,973 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:49:29,973 INFO  L495      AbstractCegarLoop]: Abstraction has 359 states and 587 transitions.
[2023-11-26 11:49:29,973 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:29,973 INFO  L276                IsEmpty]: Start isEmpty. Operand 359 states and 587 transitions.
[2023-11-26 11:49:29,977 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 92
[2023-11-26 11:49:29,978 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:49:29,978 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 11:49:29,978 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-26 11:49:29,979 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:49:29,979 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:49:29,980 INFO  L85        PathProgramCache]: Analyzing trace with hash -787362335, now seen corresponding path program 1 times
[2023-11-26 11:49:29,980 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:49:29,980 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881813759]
[2023-11-26 11:49:29,980 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:49:29,981 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:49:30,081 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:49:30,281 INFO  L134       CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-26 11:49:30,283 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:49:30,284 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881813759]
[2023-11-26 11:49:30,285 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881813759] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:49:30,286 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 11:49:30,286 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-26 11:49:30,287 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995295594]
[2023-11-26 11:49:30,287 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:49:30,288 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 11:49:30,288 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:49:30,290 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 11:49:30,292 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 11:49:30,293 INFO  L87              Difference]: Start difference. First operand 359 states and 587 transitions. Second operand  has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:31,394 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:49:31,395 INFO  L93              Difference]: Finished difference Result 1073 states and 1758 transitions.
[2023-11-26 11:49:31,395 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 11:49:31,396 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91
[2023-11-26 11:49:31,396 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:49:31,402 INFO  L225             Difference]: With dead ends: 1073
[2023-11-26 11:49:31,402 INFO  L226             Difference]: Without dead ends: 715
[2023-11-26 11:49:31,405 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 11:49:31,407 INFO  L413           NwaCegarLoop]: 83 mSDtfsCounter, 132 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time
[2023-11-26 11:49:31,407 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 87 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time]
[2023-11-26 11:49:31,410 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 715 states.
[2023-11-26 11:49:31,437 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 537.
[2023-11-26 11:49:31,439 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 537 states, 536 states have (on average 1.4944029850746268) internal successors, (801), 536 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:31,442 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 801 transitions.
[2023-11-26 11:49:31,443 INFO  L78                 Accepts]: Start accepts. Automaton has 537 states and 801 transitions. Word has length 91
[2023-11-26 11:49:31,443 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:49:31,444 INFO  L495      AbstractCegarLoop]: Abstraction has 537 states and 801 transitions.
[2023-11-26 11:49:31,444 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:31,444 INFO  L276                IsEmpty]: Start isEmpty. Operand 537 states and 801 transitions.
[2023-11-26 11:49:31,451 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 118
[2023-11-26 11:49:31,451 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:49:31,451 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 11:49:31,452 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-26 11:49:31,452 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:49:31,453 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:49:31,453 INFO  L85        PathProgramCache]: Analyzing trace with hash -1115796798, now seen corresponding path program 1 times
[2023-11-26 11:49:31,453 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:49:31,453 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593269145]
[2023-11-26 11:49:31,453 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:49:31,454 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:49:31,518 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:49:31,915 INFO  L134       CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-26 11:49:31,915 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:49:31,915 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593269145]
[2023-11-26 11:49:31,915 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593269145] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:49:31,916 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 11:49:31,916 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-26 11:49:31,916 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403497608]
[2023-11-26 11:49:31,916 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:49:31,917 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-26 11:49:31,917 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:49:31,918 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-26 11:49:31,918 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-26 11:49:31,918 INFO  L87              Difference]: Start difference. First operand 537 states and 801 transitions. Second operand  has 4 states, 4 states have (on average 29.25) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:33,071 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:49:33,072 INFO  L93              Difference]: Finished difference Result 1254 states and 1818 transitions.
[2023-11-26 11:49:33,072 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-26 11:49:33,072 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 29.25) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117
[2023-11-26 11:49:33,073 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:49:33,078 INFO  L225             Difference]: With dead ends: 1254
[2023-11-26 11:49:33,079 INFO  L226             Difference]: Without dead ends: 718
[2023-11-26 11:49:33,080 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-26 11:49:33,081 INFO  L413           NwaCegarLoop]: 115 mSDtfsCounter, 193 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time
[2023-11-26 11:49:33,082 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 123 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time]
[2023-11-26 11:49:33,084 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 718 states.
[2023-11-26 11:49:33,107 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 715.
[2023-11-26 11:49:33,109 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 715 states, 714 states have (on average 1.3795518207282913) internal successors, (985), 714 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:33,113 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 985 transitions.
[2023-11-26 11:49:33,113 INFO  L78                 Accepts]: Start accepts. Automaton has 715 states and 985 transitions. Word has length 117
[2023-11-26 11:49:33,114 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:49:33,114 INFO  L495      AbstractCegarLoop]: Abstraction has 715 states and 985 transitions.
[2023-11-26 11:49:33,114 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 29.25) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:33,115 INFO  L276                IsEmpty]: Start isEmpty. Operand 715 states and 985 transitions.
[2023-11-26 11:49:33,120 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 198
[2023-11-26 11:49:33,120 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:49:33,121 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 11:49:33,121 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-11-26 11:49:33,121 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:49:33,122 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:49:33,122 INFO  L85        PathProgramCache]: Analyzing trace with hash 1853178191, now seen corresponding path program 1 times
[2023-11-26 11:49:33,123 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:49:33,123 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112200193]
[2023-11-26 11:49:33,123 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:49:33,123 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:49:33,181 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:49:33,549 INFO  L134       CoverageAnalysis]: Checked inductivity of 128 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-26 11:49:33,549 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:49:33,549 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112200193]
[2023-11-26 11:49:33,549 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112200193] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:49:33,550 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 11:49:33,550 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-26 11:49:33,550 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656630402]
[2023-11-26 11:49:33,550 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:49:33,551 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-26 11:49:33,551 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:49:33,552 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-26 11:49:33,553 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2023-11-26 11:49:33,553 INFO  L87              Difference]: Start difference. First operand 715 states and 985 transitions. Second operand  has 4 states, 4 states have (on average 49.25) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:34,711 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:49:34,711 INFO  L93              Difference]: Finished difference Result 1458 states and 2028 transitions.
[2023-11-26 11:49:34,712 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-26 11:49:34,712 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 49.25) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 197
[2023-11-26 11:49:34,713 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:49:34,720 INFO  L225             Difference]: With dead ends: 1458
[2023-11-26 11:49:34,720 INFO  L226             Difference]: Without dead ends: 893
[2023-11-26 11:49:34,722 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2023-11-26 11:49:34,723 INFO  L413           NwaCegarLoop]: 91 mSDtfsCounter, 116 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time
[2023-11-26 11:49:34,724 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 98 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time]
[2023-11-26 11:49:34,727 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 893 states.
[2023-11-26 11:49:34,748 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 893.
[2023-11-26 11:49:34,750 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 893 states, 892 states have (on average 1.210762331838565) internal successors, (1080), 892 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:34,755 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1080 transitions.
[2023-11-26 11:49:34,755 INFO  L78                 Accepts]: Start accepts. Automaton has 893 states and 1080 transitions. Word has length 197
[2023-11-26 11:49:34,756 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:49:34,756 INFO  L495      AbstractCegarLoop]: Abstraction has 893 states and 1080 transitions.
[2023-11-26 11:49:34,757 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 49.25) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:34,757 INFO  L276                IsEmpty]: Start isEmpty. Operand 893 states and 1080 transitions.
[2023-11-26 11:49:34,763 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 304
[2023-11-26 11:49:34,763 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:49:34,764 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 11:49:34,764 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2023-11-26 11:49:34,764 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:49:34,765 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:49:34,765 INFO  L85        PathProgramCache]: Analyzing trace with hash -1765070431, now seen corresponding path program 1 times
[2023-11-26 11:49:34,766 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:49:34,766 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026826224]
[2023-11-26 11:49:34,766 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:49:34,766 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:49:34,857 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:49:35,593 INFO  L134       CoverageAnalysis]: Checked inductivity of 309 backedges. 113 proven. 130 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked.
[2023-11-26 11:49:35,594 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:49:35,594 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026826224]
[2023-11-26 11:49:35,594 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026826224] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-26 11:49:35,595 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977157965]
[2023-11-26 11:49:35,595 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:49:35,595 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-26 11:49:35,596 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/z3
[2023-11-26 11:49:35,600 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-26 11:49:35,609 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-26 11:49:35,799 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:49:35,803 INFO  L262         TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 2 conjunts are in the unsatisfiable core
[2023-11-26 11:49:35,819 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-26 11:49:36,406 INFO  L134       CoverageAnalysis]: Checked inductivity of 309 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked.
[2023-11-26 11:49:36,406 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-26 11:49:36,407 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977157965] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:49:36,407 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-26 11:49:36,408 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5
[2023-11-26 11:49:36,408 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232709674]
[2023-11-26 11:49:36,409 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:49:36,410 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 11:49:36,410 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:49:36,411 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 11:49:36,411 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2023-11-26 11:49:36,412 INFO  L87              Difference]: Start difference. First operand 893 states and 1080 transitions. Second operand  has 3 states, 3 states have (on average 45.0) internal successors, (135), 2 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:37,283 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:49:37,283 INFO  L93              Difference]: Finished difference Result 1963 states and 2487 transitions.
[2023-11-26 11:49:37,284 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 11:49:37,285 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 45.0) internal successors, (135), 2 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 303
[2023-11-26 11:49:37,286 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:49:37,295 INFO  L225             Difference]: With dead ends: 1963
[2023-11-26 11:49:37,295 INFO  L226             Difference]: Without dead ends: 1249
[2023-11-26 11:49:37,297 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2023-11-26 11:49:37,298 INFO  L413           NwaCegarLoop]: 42 mSDtfsCounter, 82 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2023-11-26 11:49:37,299 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 45 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2023-11-26 11:49:37,302 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1249 states.
[2023-11-26 11:49:37,329 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 1249.
[2023-11-26 11:49:37,333 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1249 states, 1248 states have (on average 1.203525641025641) internal successors, (1502), 1248 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:37,339 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 1502 transitions.
[2023-11-26 11:49:37,339 INFO  L78                 Accepts]: Start accepts. Automaton has 1249 states and 1502 transitions. Word has length 303
[2023-11-26 11:49:37,340 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:49:37,340 INFO  L495      AbstractCegarLoop]: Abstraction has 1249 states and 1502 transitions.
[2023-11-26 11:49:37,341 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 45.0) internal successors, (135), 2 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:37,341 INFO  L276                IsEmpty]: Start isEmpty. Operand 1249 states and 1502 transitions.
[2023-11-26 11:49:37,347 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 307
[2023-11-26 11:49:37,347 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:49:37,348 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 11:49:37,362 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-26 11:49:37,555 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-26 11:49:37,556 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:49:37,557 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:49:37,557 INFO  L85        PathProgramCache]: Analyzing trace with hash -1112404570, now seen corresponding path program 1 times
[2023-11-26 11:49:37,557 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:49:37,557 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477635384]
[2023-11-26 11:49:37,557 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:49:37,558 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:49:37,671 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:49:38,180 INFO  L134       CoverageAnalysis]: Checked inductivity of 315 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked.
[2023-11-26 11:49:38,181 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:49:38,181 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477635384]
[2023-11-26 11:49:38,182 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477635384] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:49:38,182 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 11:49:38,182 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-26 11:49:38,183 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919950116]
[2023-11-26 11:49:38,183 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:49:38,184 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 11:49:38,184 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:49:38,185 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 11:49:38,185 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 11:49:38,186 INFO  L87              Difference]: Start difference. First operand 1249 states and 1502 transitions. Second operand  has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:39,086 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:49:39,086 INFO  L93              Difference]: Finished difference Result 2675 states and 3292 transitions.
[2023-11-26 11:49:39,086 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 11:49:39,087 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 306
[2023-11-26 11:49:39,088 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:49:39,099 INFO  L225             Difference]: With dead ends: 2675
[2023-11-26 11:49:39,099 INFO  L226             Difference]: Without dead ends: 1605
[2023-11-26 11:49:39,101 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 11:49:39,102 INFO  L413           NwaCegarLoop]: 71 mSDtfsCounter, 110 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2023-11-26 11:49:39,103 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 75 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2023-11-26 11:49:39,106 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1605 states.
[2023-11-26 11:49:39,138 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 1605.
[2023-11-26 11:49:39,142 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1605 states, 1604 states have (on average 1.1826683291770574) internal successors, (1897), 1604 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:39,150 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 1897 transitions.
[2023-11-26 11:49:39,150 INFO  L78                 Accepts]: Start accepts. Automaton has 1605 states and 1897 transitions. Word has length 306
[2023-11-26 11:49:39,151 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:49:39,151 INFO  L495      AbstractCegarLoop]: Abstraction has 1605 states and 1897 transitions.
[2023-11-26 11:49:39,152 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:39,152 INFO  L276                IsEmpty]: Start isEmpty. Operand 1605 states and 1897 transitions.
[2023-11-26 11:49:39,158 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 318
[2023-11-26 11:49:39,159 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:49:39,159 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 11:49:39,160 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2023-11-26 11:49:39,160 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:49:39,161 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:49:39,161 INFO  L85        PathProgramCache]: Analyzing trace with hash 907494404, now seen corresponding path program 1 times
[2023-11-26 11:49:39,161 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:49:39,162 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938363985]
[2023-11-26 11:49:39,162 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:49:39,162 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:49:39,274 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:49:40,127 INFO  L134       CoverageAnalysis]: Checked inductivity of 337 backedges. 107 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-26 11:49:40,128 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:49:40,128 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938363985]
[2023-11-26 11:49:40,128 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938363985] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-26 11:49:40,128 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437189578]
[2023-11-26 11:49:40,129 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:49:40,129 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-26 11:49:40,129 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/z3
[2023-11-26 11:49:40,130 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-26 11:49:40,164 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-26 11:49:40,341 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:49:40,344 INFO  L262         TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 2 conjunts are in the unsatisfiable core
[2023-11-26 11:49:40,351 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-26 11:49:40,409 INFO  L134       CoverageAnalysis]: Checked inductivity of 337 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked.
[2023-11-26 11:49:40,410 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-26 11:49:40,410 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437189578] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:49:40,410 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-26 11:49:40,411 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7
[2023-11-26 11:49:40,411 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619784432]
[2023-11-26 11:49:40,411 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:49:40,412 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 11:49:40,413 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:49:40,413 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 11:49:40,414 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2023-11-26 11:49:40,414 INFO  L87              Difference]: Start difference. First operand 1605 states and 1897 transitions. Second operand  has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:41,074 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:49:41,074 INFO  L93              Difference]: Finished difference Result 3743 states and 4414 transitions.
[2023-11-26 11:49:41,074 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 11:49:41,075 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 317
[2023-11-26 11:49:41,075 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:49:41,086 INFO  L225             Difference]: With dead ends: 3743
[2023-11-26 11:49:41,087 INFO  L226             Difference]: Without dead ends: 1961
[2023-11-26 11:49:41,089 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2023-11-26 11:49:41,090 INFO  L413           NwaCegarLoop]: 258 mSDtfsCounter, 154 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2023-11-26 11:49:41,090 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 262 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2023-11-26 11:49:41,094 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1961 states.
[2023-11-26 11:49:41,123 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1605.
[2023-11-26 11:49:41,126 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1605 states, 1604 states have (on average 1.167082294264339) internal successors, (1872), 1604 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:41,132 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 1872 transitions.
[2023-11-26 11:49:41,133 INFO  L78                 Accepts]: Start accepts. Automaton has 1605 states and 1872 transitions. Word has length 317
[2023-11-26 11:49:41,134 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:49:41,134 INFO  L495      AbstractCegarLoop]: Abstraction has 1605 states and 1872 transitions.
[2023-11-26 11:49:41,134 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:41,134 INFO  L276                IsEmpty]: Start isEmpty. Operand 1605 states and 1872 transitions.
[2023-11-26 11:49:41,140 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 353
[2023-11-26 11:49:41,140 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:49:41,141 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 11:49:41,152 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2023-11-26 11:49:41,347 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-26 11:49:41,348 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:49:41,349 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:49:41,349 INFO  L85        PathProgramCache]: Analyzing trace with hash 1401582273, now seen corresponding path program 1 times
[2023-11-26 11:49:41,349 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:49:41,349 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565743704]
[2023-11-26 11:49:41,350 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:49:41,353 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:49:41,430 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:49:41,902 INFO  L134       CoverageAnalysis]: Checked inductivity of 360 backedges. 335 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked.
[2023-11-26 11:49:41,902 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:49:41,903 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565743704]
[2023-11-26 11:49:41,903 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565743704] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:49:41,903 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 11:49:41,903 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-26 11:49:41,904 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419919152]
[2023-11-26 11:49:41,904 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:49:41,905 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-26 11:49:41,905 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:49:41,906 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-26 11:49:41,907 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2023-11-26 11:49:41,908 INFO  L87              Difference]: Start difference. First operand 1605 states and 1872 transitions. Second operand  has 4 states, 4 states have (on average 82.0) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:43,017 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:49:43,017 INFO  L93              Difference]: Finished difference Result 3387 states and 3928 transitions.
[2023-11-26 11:49:43,017 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-26 11:49:43,018 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 82.0) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 352
[2023-11-26 11:49:43,018 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:49:43,029 INFO  L225             Difference]: With dead ends: 3387
[2023-11-26 11:49:43,029 INFO  L226             Difference]: Without dead ends: 1961
[2023-11-26 11:49:43,031 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2023-11-26 11:49:43,032 INFO  L413           NwaCegarLoop]: 78 mSDtfsCounter, 124 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time
[2023-11-26 11:49:43,032 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 85 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time]
[2023-11-26 11:49:43,035 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1961 states.
[2023-11-26 11:49:43,064 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1783.
[2023-11-26 11:49:43,068 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1783 states, 1782 states have (on average 1.1509539842873175) internal successors, (2051), 1782 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:43,074 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 2051 transitions.
[2023-11-26 11:49:43,074 INFO  L78                 Accepts]: Start accepts. Automaton has 1783 states and 2051 transitions. Word has length 352
[2023-11-26 11:49:43,075 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:49:43,075 INFO  L495      AbstractCegarLoop]: Abstraction has 1783 states and 2051 transitions.
[2023-11-26 11:49:43,076 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 82.0) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:43,076 INFO  L276                IsEmpty]: Start isEmpty. Operand 1783 states and 2051 transitions.
[2023-11-26 11:49:43,083 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 407
[2023-11-26 11:49:43,083 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:49:43,084 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 11:49:43,084 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8
[2023-11-26 11:49:43,084 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:49:43,085 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:49:43,085 INFO  L85        PathProgramCache]: Analyzing trace with hash -1009044128, now seen corresponding path program 1 times
[2023-11-26 11:49:43,085 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:49:43,085 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147030203]
[2023-11-26 11:49:43,086 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:49:43,086 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:49:43,180 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:49:43,795 INFO  L134       CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked.
[2023-11-26 11:49:43,795 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:49:43,796 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147030203]
[2023-11-26 11:49:43,796 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147030203] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-26 11:49:43,796 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603187636]
[2023-11-26 11:49:43,796 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:49:43,797 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-26 11:49:43,797 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/z3
[2023-11-26 11:49:43,798 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-26 11:49:43,817 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-26 11:49:44,009 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:49:44,012 INFO  L262         TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 2 conjunts are in the unsatisfiable core
[2023-11-26 11:49:44,019 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-26 11:49:44,691 INFO  L134       CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked.
[2023-11-26 11:49:44,691 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-26 11:49:44,691 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [603187636] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:49:44,691 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-26 11:49:44,692 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4
[2023-11-26 11:49:44,692 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210389829]
[2023-11-26 11:49:44,692 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:49:44,693 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 11:49:44,693 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:49:44,694 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 11:49:44,694 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-26 11:49:44,695 INFO  L87              Difference]: Start difference. First operand 1783 states and 2051 transitions. Second operand  has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:45,409 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:49:45,409 INFO  L93              Difference]: Finished difference Result 2319 states and 2669 transitions.
[2023-11-26 11:49:45,409 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 11:49:45,410 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 406
[2023-11-26 11:49:45,411 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:49:45,424 INFO  L225             Difference]: With dead ends: 2319
[2023-11-26 11:49:45,424 INFO  L226             Difference]: Without dead ends: 2317
[2023-11-26 11:49:45,425 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-26 11:49:45,426 INFO  L413           NwaCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2023-11-26 11:49:45,427 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 14 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2023-11-26 11:49:45,431 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2317 states.
[2023-11-26 11:49:45,471 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 1605.
[2023-11-26 11:49:45,475 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1605 states, 1604 states have (on average 1.121571072319202) internal successors, (1799), 1604 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:45,480 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 1799 transitions.
[2023-11-26 11:49:45,480 INFO  L78                 Accepts]: Start accepts. Automaton has 1605 states and 1799 transitions. Word has length 406
[2023-11-26 11:49:45,481 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:49:45,482 INFO  L495      AbstractCegarLoop]: Abstraction has 1605 states and 1799 transitions.
[2023-11-26 11:49:45,482 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:45,482 INFO  L276                IsEmpty]: Start isEmpty. Operand 1605 states and 1799 transitions.
[2023-11-26 11:49:45,491 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 409
[2023-11-26 11:49:45,492 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:49:45,492 INFO  L195           NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 11:49:45,505 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2023-11-26 11:49:45,699 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9
[2023-11-26 11:49:45,699 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:49:45,699 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:49:45,700 INFO  L85        PathProgramCache]: Analyzing trace with hash 730790538, now seen corresponding path program 1 times
[2023-11-26 11:49:45,700 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:49:45,700 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508371424]
[2023-11-26 11:49:45,700 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:49:45,700 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:49:45,823 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:49:46,192 INFO  L134       CoverageAnalysis]: Checked inductivity of 623 backedges. 360 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked.
[2023-11-26 11:49:46,192 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:49:46,192 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508371424]
[2023-11-26 11:49:46,193 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508371424] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:49:46,193 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 11:49:46,193 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-26 11:49:46,193 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308375173]
[2023-11-26 11:49:46,194 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:49:46,194 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-26 11:49:46,195 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:49:46,195 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-26 11:49:46,196 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2023-11-26 11:49:46,196 INFO  L87              Difference]: Start difference. First operand 1605 states and 1799 transitions. Second operand  has 4 states, 4 states have (on average 56.5) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:47,140 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:49:47,140 INFO  L93              Difference]: Finished difference Result 3238 states and 3630 transitions.
[2023-11-26 11:49:47,141 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-26 11:49:47,141 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 56.5) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 408
[2023-11-26 11:49:47,142 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:49:47,152 INFO  L225             Difference]: With dead ends: 3238
[2023-11-26 11:49:47,152 INFO  L226             Difference]: Without dead ends: 1783
[2023-11-26 11:49:47,154 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2023-11-26 11:49:47,155 INFO  L413           NwaCegarLoop]: 7 mSDtfsCounter, 140 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time
[2023-11-26 11:49:47,156 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 14 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time]
[2023-11-26 11:49:47,159 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1783 states.
[2023-11-26 11:49:47,189 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 1605.
[2023-11-26 11:49:47,192 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1605 states, 1604 states have (on average 1.0835411471321696) internal successors, (1738), 1604 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:47,197 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 1738 transitions.
[2023-11-26 11:49:47,197 INFO  L78                 Accepts]: Start accepts. Automaton has 1605 states and 1738 transitions. Word has length 408
[2023-11-26 11:49:47,198 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:49:47,198 INFO  L495      AbstractCegarLoop]: Abstraction has 1605 states and 1738 transitions.
[2023-11-26 11:49:47,199 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 56.5) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:47,199 INFO  L276                IsEmpty]: Start isEmpty. Operand 1605 states and 1738 transitions.
[2023-11-26 11:49:47,213 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 435
[2023-11-26 11:49:47,214 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:49:47,214 INFO  L195           NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1]
[2023-11-26 11:49:47,214 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10
[2023-11-26 11:49:47,215 INFO  L420      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:49:47,215 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:49:47,215 INFO  L85        PathProgramCache]: Analyzing trace with hash 327913705, now seen corresponding path program 1 times
[2023-11-26 11:49:47,216 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:49:47,216 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18898070]
[2023-11-26 11:49:47,216 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:49:47,216 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:49:47,341 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:49:47,932 INFO  L134       CoverageAnalysis]: Checked inductivity of 685 backedges. 353 proven. 18 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked.
[2023-11-26 11:49:47,933 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:49:47,933 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18898070]
[2023-11-26 11:49:47,933 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18898070] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-26 11:49:47,933 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729256662]
[2023-11-26 11:49:47,933 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:49:47,934 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-26 11:49:47,934 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/z3
[2023-11-26 11:49:47,935 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-26 11:49:48,008 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-26 11:49:48,170 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:49:48,172 INFO  L262         TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 2 conjunts are in the unsatisfiable core
[2023-11-26 11:49:48,179 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-26 11:49:48,229 INFO  L134       CoverageAnalysis]: Checked inductivity of 685 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 586 trivial. 0 not checked.
[2023-11-26 11:49:48,229 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-26 11:49:48,230 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729256662] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:49:48,230 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-26 11:49:48,230 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6
[2023-11-26 11:49:48,230 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553503261]
[2023-11-26 11:49:48,231 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:49:48,231 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 11:49:48,232 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:49:48,232 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 11:49:48,232 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2023-11-26 11:49:48,233 INFO  L87              Difference]: Start difference. First operand 1605 states and 1738 transitions. Second operand  has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:48,823 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:49:48,823 INFO  L93              Difference]: Finished difference Result 1963 states and 2142 transitions.
[2023-11-26 11:49:48,823 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 11:49:48,824 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 434
[2023-11-26 11:49:48,825 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:49:48,835 INFO  L225             Difference]: With dead ends: 1963
[2023-11-26 11:49:48,835 INFO  L226             Difference]: Without dead ends: 1961
[2023-11-26 11:49:48,836 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2023-11-26 11:49:48,836 INFO  L413           NwaCegarLoop]: 5 mSDtfsCounter, 174 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2023-11-26 11:49:48,837 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 9 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2023-11-26 11:49:48,840 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1961 states.
[2023-11-26 11:49:48,868 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1605.
[2023-11-26 11:49:48,871 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1605 states, 1604 states have (on average 1.0835411471321696) internal successors, (1738), 1604 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:48,876 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 1738 transitions.
[2023-11-26 11:49:48,876 INFO  L78                 Accepts]: Start accepts. Automaton has 1605 states and 1738 transitions. Word has length 434
[2023-11-26 11:49:48,877 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:49:48,877 INFO  L495      AbstractCegarLoop]: Abstraction has 1605 states and 1738 transitions.
[2023-11-26 11:49:48,877 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:48,878 INFO  L276                IsEmpty]: Start isEmpty. Operand 1605 states and 1738 transitions.
[2023-11-26 11:49:48,882 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 522
[2023-11-26 11:49:48,883 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:49:48,883 INFO  L195           NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 11:49:48,890 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2023-11-26 11:49:49,090 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11
[2023-11-26 11:49:49,090 INFO  L420      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:49:49,090 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:49:49,090 INFO  L85        PathProgramCache]: Analyzing trace with hash -1730121128, now seen corresponding path program 1 times
[2023-11-26 11:49:49,091 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:49:49,091 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111508978]
[2023-11-26 11:49:49,091 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:49:49,091 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:49:49,200 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:49:49,982 INFO  L134       CoverageAnalysis]: Checked inductivity of 1033 backedges. 683 proven. 11 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked.
[2023-11-26 11:49:49,982 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:49:49,983 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111508978]
[2023-11-26 11:49:49,983 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111508978] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-26 11:49:49,983 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384536583]
[2023-11-26 11:49:49,983 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:49:49,984 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-26 11:49:49,984 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/z3
[2023-11-26 11:49:49,985 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-26 11:49:50,008 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-26 11:49:50,196 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:49:50,199 INFO  L262         TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 3 conjunts are in the unsatisfiable core
[2023-11-26 11:49:50,220 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-26 11:49:50,884 INFO  L134       CoverageAnalysis]: Checked inductivity of 1033 backedges. 378 proven. 0 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked.
[2023-11-26 11:49:50,884 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-26 11:49:50,885 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384536583] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:49:50,885 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-26 11:49:50,885 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5
[2023-11-26 11:49:50,886 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664159707]
[2023-11-26 11:49:50,886 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:49:50,887 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 11:49:50,887 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:49:50,887 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 11:49:50,888 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2023-11-26 11:49:50,888 INFO  L87              Difference]: Start difference. First operand 1605 states and 1738 transitions. Second operand  has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:51,435 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:49:51,436 INFO  L93              Difference]: Finished difference Result 3387 states and 3679 transitions.
[2023-11-26 11:49:51,436 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 11:49:51,436 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 521
[2023-11-26 11:49:51,437 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:49:51,447 INFO  L225             Difference]: With dead ends: 3387
[2023-11-26 11:49:51,447 INFO  L226             Difference]: Without dead ends: 1961
[2023-11-26 11:49:51,449 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 520 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2023-11-26 11:49:51,450 INFO  L413           NwaCegarLoop]: 42 mSDtfsCounter, 78 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2023-11-26 11:49:51,450 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 46 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2023-11-26 11:49:51,453 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1961 states.
[2023-11-26 11:49:51,486 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1783.
[2023-11-26 11:49:51,490 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1783 states, 1782 states have (on average 1.085297418630752) internal successors, (1934), 1782 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:51,494 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 1934 transitions.
[2023-11-26 11:49:51,494 INFO  L78                 Accepts]: Start accepts. Automaton has 1783 states and 1934 transitions. Word has length 521
[2023-11-26 11:49:51,495 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:49:51,495 INFO  L495      AbstractCegarLoop]: Abstraction has 1783 states and 1934 transitions.
[2023-11-26 11:49:51,496 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:51,496 INFO  L276                IsEmpty]: Start isEmpty. Operand 1783 states and 1934 transitions.
[2023-11-26 11:49:51,501 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 589
[2023-11-26 11:49:51,502 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:49:51,502 INFO  L195           NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 11:49:51,518 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2023-11-26 11:49:51,713 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12
[2023-11-26 11:49:51,714 INFO  L420      AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:49:51,714 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:49:51,715 INFO  L85        PathProgramCache]: Analyzing trace with hash 1619645621, now seen corresponding path program 1 times
[2023-11-26 11:49:51,715 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:49:51,715 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063701647]
[2023-11-26 11:49:51,715 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:49:51,715 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:49:51,830 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:49:52,179 INFO  L134       CoverageAnalysis]: Checked inductivity of 1033 backedges. 694 proven. 0 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked.
[2023-11-26 11:49:52,179 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:49:52,179 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063701647]
[2023-11-26 11:49:52,180 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063701647] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:49:52,180 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 11:49:52,180 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-26 11:49:52,180 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031726615]
[2023-11-26 11:49:52,181 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:49:52,182 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 11:49:52,182 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:49:52,183 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 11:49:52,183 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 11:49:52,184 INFO  L87              Difference]: Start difference. First operand 1783 states and 1934 transitions. Second operand  has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:52,879 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:49:52,879 INFO  L93              Difference]: Finished difference Result 4099 states and 4501 transitions.
[2023-11-26 11:49:52,880 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 11:49:52,881 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 588
[2023-11-26 11:49:52,882 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:49:52,893 INFO  L225             Difference]: With dead ends: 4099
[2023-11-26 11:49:52,893 INFO  L226             Difference]: Without dead ends: 2495
[2023-11-26 11:49:52,900 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 11:49:52,901 INFO  L413           NwaCegarLoop]: 49 mSDtfsCounter, 4 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2023-11-26 11:49:52,903 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 53 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2023-11-26 11:49:52,910 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2495 states.
[2023-11-26 11:49:52,958 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 2317.
[2023-11-26 11:49:52,963 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 2317 states, 2316 states have (on average 1.0785837651122625) internal successors, (2498), 2316 states have internal predecessors, (2498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:52,969 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 2498 transitions.
[2023-11-26 11:49:52,969 INFO  L78                 Accepts]: Start accepts. Automaton has 2317 states and 2498 transitions. Word has length 588
[2023-11-26 11:49:52,970 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:49:52,970 INFO  L495      AbstractCegarLoop]: Abstraction has 2317 states and 2498 transitions.
[2023-11-26 11:49:52,971 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:52,971 INFO  L276                IsEmpty]: Start isEmpty. Operand 2317 states and 2498 transitions.
[2023-11-26 11:49:52,977 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 591
[2023-11-26 11:49:52,977 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:49:52,977 INFO  L195           NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 11:49:52,978 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13
[2023-11-26 11:49:52,978 INFO  L420      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:49:52,978 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:49:52,979 INFO  L85        PathProgramCache]: Analyzing trace with hash 1577766309, now seen corresponding path program 1 times
[2023-11-26 11:49:52,979 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:49:52,979 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390608919]
[2023-11-26 11:49:52,979 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:49:52,979 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:49:53,098 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:49:53,756 INFO  L134       CoverageAnalysis]: Checked inductivity of 1402 backedges. 968 proven. 0 refuted. 0 times theorem prover too weak. 434 trivial. 0 not checked.
[2023-11-26 11:49:53,756 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:49:53,756 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390608919]
[2023-11-26 11:49:53,756 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390608919] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:49:53,757 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 11:49:53,757 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-26 11:49:53,757 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607153793]
[2023-11-26 11:49:53,757 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:49:53,758 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 11:49:53,759 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:49:53,760 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 11:49:53,760 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 11:49:53,760 INFO  L87              Difference]: Start difference. First operand 2317 states and 2498 transitions. Second operand  has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:54,451 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:49:54,451 INFO  L93              Difference]: Finished difference Result 4455 states and 4816 transitions.
[2023-11-26 11:49:54,452 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 11:49:54,452 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 590
[2023-11-26 11:49:54,453 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:49:54,466 INFO  L225             Difference]: With dead ends: 4455
[2023-11-26 11:49:54,467 INFO  L226             Difference]: Without dead ends: 2317
[2023-11-26 11:49:54,473 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 11:49:54,474 INFO  L413           NwaCegarLoop]: 236 mSDtfsCounter, 110 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2023-11-26 11:49:54,474 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 240 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2023-11-26 11:49:54,478 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2317 states.
[2023-11-26 11:49:54,521 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 2139.
[2023-11-26 11:49:54,524 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 2139 states, 2138 states have (on average 1.077174929840973) internal successors, (2303), 2138 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:54,530 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 2303 transitions.
[2023-11-26 11:49:54,531 INFO  L78                 Accepts]: Start accepts. Automaton has 2139 states and 2303 transitions. Word has length 590
[2023-11-26 11:49:54,532 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:49:54,532 INFO  L495      AbstractCegarLoop]: Abstraction has 2139 states and 2303 transitions.
[2023-11-26 11:49:54,533 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:54,533 INFO  L276                IsEmpty]: Start isEmpty. Operand 2139 states and 2303 transitions.
[2023-11-26 11:49:54,539 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 596
[2023-11-26 11:49:54,540 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:49:54,540 INFO  L195           NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 11:49:54,541 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14
[2023-11-26 11:49:54,541 INFO  L420      AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:49:54,544 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:49:54,544 INFO  L85        PathProgramCache]: Analyzing trace with hash 703015622, now seen corresponding path program 1 times
[2023-11-26 11:49:54,544 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:49:54,545 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090928258]
[2023-11-26 11:49:54,545 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:49:54,545 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:49:54,667 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:49:55,097 INFO  L134       CoverageAnalysis]: Checked inductivity of 1040 backedges. 701 proven. 0 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked.
[2023-11-26 11:49:55,097 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:49:55,098 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090928258]
[2023-11-26 11:49:55,098 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090928258] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:49:55,098 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 11:49:55,099 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-26 11:49:55,099 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886812795]
[2023-11-26 11:49:55,099 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:49:55,101 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 11:49:55,101 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:49:55,102 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 11:49:55,103 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 11:49:55,103 INFO  L87              Difference]: Start difference. First operand 2139 states and 2303 transitions. Second operand  has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:55,885 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:49:55,885 INFO  L93              Difference]: Finished difference Result 4989 states and 5421 transitions.
[2023-11-26 11:49:55,885 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 11:49:55,886 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 595
[2023-11-26 11:49:55,888 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:49:55,901 INFO  L225             Difference]: With dead ends: 4989
[2023-11-26 11:49:55,901 INFO  L226             Difference]: Without dead ends: 3029
[2023-11-26 11:49:55,904 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 11:49:55,905 INFO  L413           NwaCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2023-11-26 11:49:55,906 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 49 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2023-11-26 11:49:55,912 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3029 states.
[2023-11-26 11:49:55,985 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3029 to 2851.
[2023-11-26 11:49:55,991 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 2851 states, 2850 states have (on average 1.075438596491228) internal successors, (3065), 2850 states have internal predecessors, (3065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:56,000 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2851 states to 2851 states and 3065 transitions.
[2023-11-26 11:49:56,000 INFO  L78                 Accepts]: Start accepts. Automaton has 2851 states and 3065 transitions. Word has length 595
[2023-11-26 11:49:56,002 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:49:56,002 INFO  L495      AbstractCegarLoop]: Abstraction has 2851 states and 3065 transitions.
[2023-11-26 11:49:56,003 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:56,003 INFO  L276                IsEmpty]: Start isEmpty. Operand 2851 states and 3065 transitions.
[2023-11-26 11:49:56,014 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 598
[2023-11-26 11:49:56,014 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:49:56,015 INFO  L195           NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 11:49:56,015 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15
[2023-11-26 11:49:56,016 INFO  L420      AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:49:56,016 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:49:56,017 INFO  L85        PathProgramCache]: Analyzing trace with hash 1164632950, now seen corresponding path program 1 times
[2023-11-26 11:49:56,017 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:49:56,017 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309442040]
[2023-11-26 11:49:56,018 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:49:56,018 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:49:56,137 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:49:56,688 INFO  L134       CoverageAnalysis]: Checked inductivity of 1404 backedges. 970 proven. 0 refuted. 0 times theorem prover too weak. 434 trivial. 0 not checked.
[2023-11-26 11:49:56,688 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:49:56,688 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309442040]
[2023-11-26 11:49:56,688 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309442040] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:49:56,689 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 11:49:56,689 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-26 11:49:56,689 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389617084]
[2023-11-26 11:49:56,689 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:49:56,691 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 11:49:56,691 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:49:56,692 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 11:49:56,692 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 11:49:56,692 INFO  L87              Difference]: Start difference. First operand 2851 states and 3065 transitions. Second operand  has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:57,341 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:49:57,342 INFO  L93              Difference]: Finished difference Result 6769 states and 7345 transitions.
[2023-11-26 11:49:57,349 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 11:49:57,349 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 597
[2023-11-26 11:49:57,350 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:49:57,369 INFO  L225             Difference]: With dead ends: 6769
[2023-11-26 11:49:57,369 INFO  L226             Difference]: Without dead ends: 3919
[2023-11-26 11:49:57,373 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 11:49:57,373 INFO  L413           NwaCegarLoop]: 194 mSDtfsCounter, 114 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2023-11-26 11:49:57,374 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 197 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2023-11-26 11:49:57,379 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3919 states.
[2023-11-26 11:49:57,447 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3919 to 3563.
[2023-11-26 11:49:57,452 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3563 states, 3562 states have (on average 1.0735541830432342) internal successors, (3824), 3562 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:57,458 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3563 states to 3563 states and 3824 transitions.
[2023-11-26 11:49:57,459 INFO  L78                 Accepts]: Start accepts. Automaton has 3563 states and 3824 transitions. Word has length 597
[2023-11-26 11:49:57,459 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:49:57,460 INFO  L495      AbstractCegarLoop]: Abstraction has 3563 states and 3824 transitions.
[2023-11-26 11:49:57,460 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:57,460 INFO  L276                IsEmpty]: Start isEmpty. Operand 3563 states and 3824 transitions.
[2023-11-26 11:49:57,468 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 675
[2023-11-26 11:49:57,468 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:49:57,469 INFO  L195           NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 11:49:57,469 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16
[2023-11-26 11:49:57,469 INFO  L420      AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:49:57,470 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:49:57,470 INFO  L85        PathProgramCache]: Analyzing trace with hash 535055411, now seen corresponding path program 1 times
[2023-11-26 11:49:57,471 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:49:57,471 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443292300]
[2023-11-26 11:49:57,471 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:49:57,471 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:49:57,594 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:49:58,173 INFO  L134       CoverageAnalysis]: Checked inductivity of 1875 backedges. 1372 proven. 0 refuted. 0 times theorem prover too weak. 503 trivial. 0 not checked.
[2023-11-26 11:49:58,173 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:49:58,174 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443292300]
[2023-11-26 11:49:58,174 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443292300] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:49:58,174 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 11:49:58,174 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-26 11:49:58,174 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191196258]
[2023-11-26 11:49:58,175 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:49:58,175 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 11:49:58,176 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:49:58,176 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 11:49:58,177 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 11:49:58,177 INFO  L87              Difference]: Start difference. First operand 3563 states and 3824 transitions. Second operand  has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:58,823 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:49:58,823 INFO  L93              Difference]: Finished difference Result 7125 states and 7651 transitions.
[2023-11-26 11:49:58,824 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 11:49:58,824 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 674
[2023-11-26 11:49:58,825 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:49:58,839 INFO  L225             Difference]: With dead ends: 7125
[2023-11-26 11:49:58,839 INFO  L226             Difference]: Without dead ends: 3563
[2023-11-26 11:49:58,843 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 11:49:58,844 INFO  L413           NwaCegarLoop]: 231 mSDtfsCounter, 102 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2023-11-26 11:49:58,845 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 235 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2023-11-26 11:49:58,850 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3563 states.
[2023-11-26 11:49:58,902 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3563 to 3029.
[2023-11-26 11:49:58,906 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3029 states, 3028 states have (on average 1.07001321003963) internal successors, (3240), 3028 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:58,911 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 3240 transitions.
[2023-11-26 11:49:58,912 INFO  L78                 Accepts]: Start accepts. Automaton has 3029 states and 3240 transitions. Word has length 674
[2023-11-26 11:49:58,913 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:49:58,913 INFO  L495      AbstractCegarLoop]: Abstraction has 3029 states and 3240 transitions.
[2023-11-26 11:49:58,913 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:49:58,913 INFO  L276                IsEmpty]: Start isEmpty. Operand 3029 states and 3240 transitions.
[2023-11-26 11:49:58,921 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 751
[2023-11-26 11:49:58,921 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:49:58,922 INFO  L195           NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 11:49:58,922 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17
[2023-11-26 11:49:58,922 INFO  L420      AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:49:58,923 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:49:58,923 INFO  L85        PathProgramCache]: Analyzing trace with hash -712960512, now seen corresponding path program 1 times
[2023-11-26 11:49:58,923 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:49:58,924 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250480901]
[2023-11-26 11:49:58,924 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:49:58,924 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:49:59,064 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:49:59,623 INFO  L134       CoverageAnalysis]: Checked inductivity of 1613 backedges. 1119 proven. 155 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked.
[2023-11-26 11:49:59,624 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:49:59,624 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250480901]
[2023-11-26 11:49:59,624 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250480901] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-26 11:49:59,624 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834609502]
[2023-11-26 11:49:59,624 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:49:59,625 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-26 11:49:59,625 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/z3
[2023-11-26 11:49:59,641 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-26 11:49:59,646 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-26 11:49:59,942 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:49:59,947 INFO  L262         TraceCheckSpWp]: Trace formula consists of 932 conjuncts, 3 conjunts are in the unsatisfiable core
[2023-11-26 11:49:59,960 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-26 11:50:00,475 INFO  L134       CoverageAnalysis]: Checked inductivity of 1613 backedges. 1119 proven. 155 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked.
[2023-11-26 11:50:00,476 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-26 11:50:00,969 INFO  L134       CoverageAnalysis]: Checked inductivity of 1613 backedges. 1119 proven. 155 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked.
[2023-11-26 11:50:00,970 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [834609502] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-26 11:50:00,970 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2023-11-26 11:50:00,971 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6
[2023-11-26 11:50:00,971 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297467618]
[2023-11-26 11:50:00,971 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2023-11-26 11:50:00,974 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-26 11:50:00,974 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:50:00,976 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-26 11:50:00,976 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30
[2023-11-26 11:50:00,977 INFO  L87              Difference]: Start difference. First operand 3029 states and 3240 transitions. Second operand  has 6 states, 6 states have (on average 141.5) internal successors, (849), 6 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:50:02,240 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:50:02,240 INFO  L93              Difference]: Finished difference Result 7303 states and 7819 transitions.
[2023-11-26 11:50:02,245 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-26 11:50:02,245 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 141.5) internal successors, (849), 6 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 750
[2023-11-26 11:50:02,247 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:50:02,256 INFO  L225             Difference]: With dead ends: 7303
[2023-11-26 11:50:02,257 INFO  L226             Difference]: Without dead ends: 4453
[2023-11-26 11:50:02,260 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 1502 GetRequests, 1498 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30
[2023-11-26 11:50:02,261 INFO  L413           NwaCegarLoop]: 47 mSDtfsCounter, 44 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1203 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 1271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time
[2023-11-26 11:50:02,262 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 64 Invalid, 1271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1203 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time]
[2023-11-26 11:50:02,268 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4453 states.
[2023-11-26 11:50:02,337 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4453 to 3563.
[2023-11-26 11:50:02,341 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3563 states, 3562 states have (on average 1.0687815833801235) internal successors, (3807), 3562 states have internal predecessors, (3807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:50:02,349 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3563 states to 3563 states and 3807 transitions.
[2023-11-26 11:50:02,349 INFO  L78                 Accepts]: Start accepts. Automaton has 3563 states and 3807 transitions. Word has length 750
[2023-11-26 11:50:02,350 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:50:02,351 INFO  L495      AbstractCegarLoop]: Abstraction has 3563 states and 3807 transitions.
[2023-11-26 11:50:02,351 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 141.5) internal successors, (849), 6 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:50:02,351 INFO  L276                IsEmpty]: Start isEmpty. Operand 3563 states and 3807 transitions.
[2023-11-26 11:50:02,370 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 927
[2023-11-26 11:50:02,371 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:50:02,372 INFO  L195           NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 11:50:02,389 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0
[2023-11-26 11:50:02,589 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1862a45f-7963-4a88-8ba9-f17ea6332aa6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-26 11:50:02,589 INFO  L420      AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:50:02,590 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:50:02,590 INFO  L85        PathProgramCache]: Analyzing trace with hash 22510053, now seen corresponding path program 1 times
[2023-11-26 11:50:02,590 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:50:02,590 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750235549]
[2023-11-26 11:50:02,591 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:50:02,591 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:50:02,781 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-26 11:50:03,292 INFO  L134       CoverageAnalysis]: Checked inductivity of 2372 backedges. 1511 proven. 0 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked.
[2023-11-26 11:50:03,293 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-26 11:50:03,293 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750235549]
[2023-11-26 11:50:03,293 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750235549] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-26 11:50:03,294 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-26 11:50:03,294 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-26 11:50:03,294 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791958998]
[2023-11-26 11:50:03,294 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-26 11:50:03,296 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-26 11:50:03,296 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-26 11:50:03,297 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-26 11:50:03,297 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 11:50:03,297 INFO  L87              Difference]: Start difference. First operand 3563 states and 3807 transitions. Second operand  has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:50:03,875 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-26 11:50:03,875 INFO  L93              Difference]: Finished difference Result 8371 states and 9009 transitions.
[2023-11-26 11:50:03,877 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-26 11:50:03,877 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 926
[2023-11-26 11:50:03,878 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-26 11:50:03,887 INFO  L225             Difference]: With dead ends: 8371
[2023-11-26 11:50:03,887 INFO  L226             Difference]: Without dead ends: 4987
[2023-11-26 11:50:03,890 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-26 11:50:03,892 INFO  L413           NwaCegarLoop]: 23 mSDtfsCounter, 109 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2023-11-26 11:50:03,892 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 26 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2023-11-26 11:50:03,904 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4987 states.
[2023-11-26 11:50:03,972 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4987 to 4809.
[2023-11-26 11:50:03,976 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4809 states, 4808 states have (on average 1.0707154742096505) internal successors, (5148), 4808 states have internal predecessors, (5148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:50:03,984 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4809 states to 4809 states and 5148 transitions.
[2023-11-26 11:50:03,984 INFO  L78                 Accepts]: Start accepts. Automaton has 4809 states and 5148 transitions. Word has length 926
[2023-11-26 11:50:03,985 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-26 11:50:03,985 INFO  L495      AbstractCegarLoop]: Abstraction has 4809 states and 5148 transitions.
[2023-11-26 11:50:03,985 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-26 11:50:03,985 INFO  L276                IsEmpty]: Start isEmpty. Operand 4809 states and 5148 transitions.
[2023-11-26 11:50:04,000 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 988
[2023-11-26 11:50:04,000 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-26 11:50:04,001 INFO  L195           NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-26 11:50:04,002 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19
[2023-11-26 11:50:04,002 INFO  L420      AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-26 11:50:04,002 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-26 11:50:04,003 INFO  L85        PathProgramCache]: Analyzing trace with hash -1501170021, now seen corresponding path program 1 times
[2023-11-26 11:50:04,003 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-26 11:50:04,003 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913650700]
[2023-11-26 11:50:04,003 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-26 11:50:04,003 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-26 11:50:04,150 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat