./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-1loop_file-8.i --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version cf1a7837
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_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-1loop_file-8.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl --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 1f77d3fa5e179feeb79449d942d251fd79b5fcf3b2d3e183583549dc44656dd2
--- Real Ultimate output ---
This is Ultimate 0.2.3-dev-cf1a783
[2023-11-12 02:27:54,935 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-12 02:27:55,074 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf
[2023-11-12 02:27:55,083 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-12 02:27:55,083 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-12 02:27:55,124 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-12 02:27:55,125 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-12 02:27:55,126 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-12 02:27:55,127 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-12 02:27:55,132 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-12 02:27:55,133 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-12 02:27:55,133 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-12 02:27:55,134 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-12 02:27:55,136 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-12 02:27:55,136 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-12 02:27:55,137 INFO  L153        SettingsManager]:  * sizeof long=4
[2023-11-12 02:27:55,137 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-12 02:27:55,138 INFO  L153        SettingsManager]:  * sizeof POINTER=4
[2023-11-12 02:27:55,138 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-12 02:27:55,139 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-12 02:27:55,139 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-12 02:27:55,140 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-12 02:27:55,140 INFO  L153        SettingsManager]:  * sizeof long double=12
[2023-11-12 02:27:55,140 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-12 02:27:55,141 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-12 02:27:55,142 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-12 02:27:55,142 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-12 02:27:55,143 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-12 02:27:55,143 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-12 02:27:55,144 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-12 02:27:55,145 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-12 02:27:55,146 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-11-12 02:27:55,146 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-12 02:27:55,146 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-12 02:27:55,147 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-12 02:27:55,147 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-12 02:27:55,147 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-12 02:27:55,147 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-12 02:27:55,148 INFO  L153        SettingsManager]:  * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC
[2023-11-12 02:27:55,165 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_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/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_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl
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 -> 1f77d3fa5e179feeb79449d942d251fd79b5fcf3b2d3e183583549dc44656dd2
[2023-11-12 02:27:55,450 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-12 02:27:55,488 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-12 02:27:55,491 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-12 02:27:55,493 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-12 02:27:55,494 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-12 02:27:55,495 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-1loop_file-8.i
[2023-11-12 02:27:59,128 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-12 02:27:59,551 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-12 02:27:59,553 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-1loop_file-8.i
[2023-11-12 02:27:59,570 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/data/fee41fdec/57104b52f4dd407eb3cef7708f3bdc55/FLAG42547821f
[2023-11-12 02:27:59,591 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/data/fee41fdec/57104b52f4dd407eb3cef7708f3bdc55
[2023-11-12 02:27:59,598 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-12 02:27:59,601 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-12 02:27:59,605 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-12 02:27:59,605 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-12 02:27:59,611 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-12 02:27:59,612 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:27:59" (1/1) ...
[2023-11-12 02:27:59,613 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e927919 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:59, skipping insertion in model container
[2023-11-12 02:27:59,614 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:27:59" (1/1) ...
[2023-11-12 02:27:59,669 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-12 02:27:59,857 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_1d20e8ba-39ff-4c82-9629-8acc410a1577/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-1loop_file-8.i[915,928]
[2023-11-12 02:27:59,971 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-12 02:28:00,000 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-12 02:28:00,017 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_1d20e8ba-39ff-4c82-9629-8acc410a1577/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-1loop_file-8.i[915,928]
[2023-11-12 02:28:00,070 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-12 02:28:00,093 INFO  L206         MainTranslator]: Completed translation
[2023-11-12 02:28:00,094 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:00 WrapperNode
[2023-11-12 02:28:00,094 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-12 02:28:00,096 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-12 02:28:00,096 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-12 02:28:00,096 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-12 02:28:00,105 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:00" (1/1) ...
[2023-11-12 02:28:00,121 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:00" (1/1) ...
[2023-11-12 02:28:00,190 INFO  L138                Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 255
[2023-11-12 02:28:00,190 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-12 02:28:00,191 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-12 02:28:00,191 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-12 02:28:00,191 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-12 02:28:00,201 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:00" (1/1) ...
[2023-11-12 02:28:00,202 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:00" (1/1) ...
[2023-11-12 02:28:00,207 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:00" (1/1) ...
[2023-11-12 02:28:00,208 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:00" (1/1) ...
[2023-11-12 02:28:00,224 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:00" (1/1) ...
[2023-11-12 02:28:00,229 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:00" (1/1) ...
[2023-11-12 02:28:00,234 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:00" (1/1) ...
[2023-11-12 02:28:00,237 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:00" (1/1) ...
[2023-11-12 02:28:00,244 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-12 02:28:00,245 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-12 02:28:00,245 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-12 02:28:00,246 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-12 02:28:00,246 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:00" (1/1) ...
[2023-11-12 02:28:00,253 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-12 02:28:00,270 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/z3
[2023-11-12 02:28:00,283 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-11-12 02:28:00,325 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-11-12 02:28:00,340 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-12 02:28:00,340 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2023-11-12 02:28:00,341 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2023-11-12 02:28:00,341 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-11-12 02:28:00,341 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-12 02:28:00,341 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-12 02:28:00,471 INFO  L236             CfgBuilder]: Building ICFG
[2023-11-12 02:28:00,474 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-12 02:28:01,164 INFO  L277             CfgBuilder]: Performing block encoding
[2023-11-12 02:28:01,172 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-12 02:28:01,173 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-12 02:28:01,175 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:28:01 BoogieIcfgContainer
[2023-11-12 02:28:01,176 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-12 02:28:01,178 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-12 02:28:01,178 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-12 02:28:01,182 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-12 02:28:01,183 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:27:59" (1/3) ...
[2023-11-12 02:28:01,183 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4433f1d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:28:01, skipping insertion in model container
[2023-11-12 02:28:01,184 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:00" (2/3) ...
[2023-11-12 02:28:01,184 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4433f1d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:28:01, skipping insertion in model container
[2023-11-12 02:28:01,185 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:28:01" (3/3) ...
[2023-11-12 02:28:01,186 INFO  L112   eAbstractionObserver]: Analyzing ICFG hardness_loopvsstraightlinecode_100-1loop_file-8.i
[2023-11-12 02:28:01,205 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-12 02:28:01,205 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-12 02:28:01,257 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-12 02:28:01,265 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;@7c982a1f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=<UNSUPPORTED>, UseSemiCommutativity=<UNSUPPORTED>, Solver=<NOT_USED>, SolverTimeout=<NOT_USED>]
[2023-11-12 02:28:01,265 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-12 02:28:01,270 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 105 states, 72 states have (on average 1.4722222222222223) internal successors, (106), 73 states have internal predecessors, (106), 30 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30)
[2023-11-12 02:28:01,290 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 199
[2023-11-12 02:28:01,290 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-12 02:28:01,291 INFO  L195           NwaCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-12 02:28:01,292 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-12 02:28:01,298 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-12 02:28:01,298 INFO  L85        PathProgramCache]: Analyzing trace with hash -1167873731, now seen corresponding path program 1 times
[2023-11-12 02:28:01,308 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-12 02:28:01,309 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953884295]
[2023-11-12 02:28:01,309 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:28:01,310 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-12 02:28:01,571 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:28:01,699 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-12 02:28:01,700 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953884295]
[2023-11-12 02:28:01,700 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic
[2023-11-12 02:28:01,700 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726013624]
[2023-11-12 02:28:01,701 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:28:01,701 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-12 02:28:01,701 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/z3
[2023-11-12 02:28:01,707 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-12 02:28:01,736 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-12 02:28:02,009 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:28:02,014 INFO  L262         TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 1 conjunts are in the unsatisfiable core
[2023-11-12 02:28:02,054 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-12 02:28:02,125 INFO  L134       CoverageAnalysis]: Checked inductivity of 1740 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked.
[2023-11-12 02:28:02,126 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-12 02:28:02,127 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726013624] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-12 02:28:02,127 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-12 02:28:02,128 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-12 02:28:02,131 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106782367]
[2023-11-12 02:28:02,132 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-12 02:28:02,138 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2023-11-12 02:28:02,139 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-12 02:28:02,176 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2023-11-12 02:28:02,177 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2023-11-12 02:28:02,180 INFO  L87              Difference]: Start difference. First operand  has 105 states, 72 states have (on average 1.4722222222222223) internal successors, (106), 73 states have internal predecessors, (106), 30 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Second operand  has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 2 states have call successors, (30)
[2023-11-12 02:28:02,245 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-12 02:28:02,246 INFO  L93              Difference]: Finished difference Result 207 states and 359 transitions.
[2023-11-12 02:28:02,247 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2023-11-12 02:28:02,249 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 2 states have call successors, (30) Word has length 198
[2023-11-12 02:28:02,249 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-12 02:28:02,260 INFO  L225             Difference]: With dead ends: 207
[2023-11-12 02:28:02,260 INFO  L226             Difference]: Without dead ends: 101
[2023-11-12 02:28:02,265 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2023-11-12 02:28:02,270 INFO  L413           NwaCegarLoop]: 163 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-12 02:28:02,271 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-12 02:28:02,292 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 101 states.
[2023-11-12 02:28:02,331 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101.
[2023-11-12 02:28:02,333 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 101 states, 69 states have (on average 1.434782608695652) internal successors, (99), 69 states have internal predecessors, (99), 30 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30)
[2023-11-12 02:28:02,339 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 159 transitions.
[2023-11-12 02:28:02,340 INFO  L78                 Accepts]: Start accepts. Automaton has 101 states and 159 transitions. Word has length 198
[2023-11-12 02:28:02,341 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-12 02:28:02,341 INFO  L495      AbstractCegarLoop]: Abstraction has 101 states and 159 transitions.
[2023-11-12 02:28:02,342 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 2 states have call successors, (30)
[2023-11-12 02:28:02,342 INFO  L276                IsEmpty]: Start isEmpty. Operand 101 states and 159 transitions.
[2023-11-12 02:28:02,348 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 199
[2023-11-12 02:28:02,349 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-12 02:28:02,349 INFO  L195           NwaCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-12 02:28:02,356 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2023-11-12 02:28:02,552 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0
[2023-11-12 02:28:02,553 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-12 02:28:02,553 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-12 02:28:02,554 INFO  L85        PathProgramCache]: Analyzing trace with hash 1676362561, now seen corresponding path program 1 times
[2023-11-12 02:28:02,554 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-12 02:28:02,554 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748527242]
[2023-11-12 02:28:02,555 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:28:02,555 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-12 02:28:02,723 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-12 02:28:02,734 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [810571890]
[2023-11-12 02:28:02,735 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:28:02,735 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-12 02:28:02,736 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/z3
[2023-11-12 02:28:02,738 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-12 02:28:02,760 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-12 02:28:02,989 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:28:02,992 INFO  L262         TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 2 conjunts are in the unsatisfiable core
[2023-11-12 02:28:03,015 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-12 02:28:03,097 INFO  L134       CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked.
[2023-11-12 02:28:03,097 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-12 02:28:03,098 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-12 02:28:03,098 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748527242]
[2023-11-12 02:28:03,098 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-12 02:28:03,098 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810571890]
[2023-11-12 02:28:03,099 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [810571890] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-12 02:28:03,099 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-12 02:28:03,099 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-12 02:28:03,100 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842362877]
[2023-11-12 02:28:03,100 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-12 02:28:03,101 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-12 02:28:03,102 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-12 02:28:03,103 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-12 02:28:03,103 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-12 02:28:03,104 INFO  L87              Difference]: Start difference. First operand 101 states and 159 transitions. Second operand  has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30)
[2023-11-12 02:28:03,192 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-12 02:28:03,193 INFO  L93              Difference]: Finished difference Result 297 states and 471 transitions.
[2023-11-12 02:28:03,193 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-12 02:28:03,194 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30) Word has length 198
[2023-11-12 02:28:03,195 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-12 02:28:03,199 INFO  L225             Difference]: With dead ends: 297
[2023-11-12 02:28:03,199 INFO  L226             Difference]: Without dead ends: 199
[2023-11-12 02:28:03,201 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-12 02:28:03,203 INFO  L413           NwaCegarLoop]: 298 mSDtfsCounter, 151 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-12 02:28:03,203 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 443 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-12 02:28:03,205 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 199 states.
[2023-11-12 02:28:03,225 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 110.
[2023-11-12 02:28:03,226 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 110 states, 78 states have (on average 1.4487179487179487) internal successors, (113), 78 states have internal predecessors, (113), 30 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30)
[2023-11-12 02:28:03,228 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 173 transitions.
[2023-11-12 02:28:03,228 INFO  L78                 Accepts]: Start accepts. Automaton has 110 states and 173 transitions. Word has length 198
[2023-11-12 02:28:03,231 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-12 02:28:03,231 INFO  L495      AbstractCegarLoop]: Abstraction has 110 states and 173 transitions.
[2023-11-12 02:28:03,231 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30)
[2023-11-12 02:28:03,232 INFO  L276                IsEmpty]: Start isEmpty. Operand 110 states and 173 transitions.
[2023-11-12 02:28:03,236 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 199
[2023-11-12 02:28:03,236 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-12 02:28:03,236 INFO  L195           NwaCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-12 02:28:03,243 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2023-11-12 02:28:03,440 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1
[2023-11-12 02:28:03,441 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-12 02:28:03,441 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-12 02:28:03,442 INFO  L85        PathProgramCache]: Analyzing trace with hash 1934527999, now seen corresponding path program 1 times
[2023-11-12 02:28:03,442 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-12 02:28:03,442 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687130268]
[2023-11-12 02:28:03,442 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:28:03,443 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-12 02:28:03,521 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-12 02:28:03,522 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1304065710]
[2023-11-12 02:28:03,522 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:28:03,522 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-12 02:28:03,522 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/z3
[2023-11-12 02:28:03,524 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-12 02:28:03,527 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-12 02:28:03,725 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:28:03,729 INFO  L262         TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 2 conjunts are in the unsatisfiable core
[2023-11-12 02:28:03,737 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-12 02:28:03,763 INFO  L134       CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked.
[2023-11-12 02:28:03,763 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-12 02:28:03,764 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-12 02:28:03,764 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687130268]
[2023-11-12 02:28:03,764 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-12 02:28:03,764 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304065710]
[2023-11-12 02:28:03,765 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304065710] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-12 02:28:03,765 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-12 02:28:03,765 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-12 02:28:03,765 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811772915]
[2023-11-12 02:28:03,765 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-12 02:28:03,766 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-12 02:28:03,766 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-12 02:28:03,767 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-12 02:28:03,768 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-12 02:28:03,768 INFO  L87              Difference]: Start difference. First operand 110 states and 173 transitions. Second operand  has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30)
[2023-11-12 02:28:03,811 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-12 02:28:03,812 INFO  L93              Difference]: Finished difference Result 292 states and 465 transitions.
[2023-11-12 02:28:03,812 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-12 02:28:03,812 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30) Word has length 198
[2023-11-12 02:28:03,814 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-12 02:28:03,816 INFO  L225             Difference]: With dead ends: 292
[2023-11-12 02:28:03,817 INFO  L226             Difference]: Without dead ends: 185
[2023-11-12 02:28:03,818 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-12 02:28:03,819 INFO  L413           NwaCegarLoop]: 270 mSDtfsCounter, 151 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-12 02:28:03,820 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 392 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-12 02:28:03,821 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 185 states.
[2023-11-12 02:28:03,837 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 101.
[2023-11-12 02:28:03,838 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 101 states, 69 states have (on average 1.4057971014492754) internal successors, (97), 69 states have internal predecessors, (97), 30 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30)
[2023-11-12 02:28:03,839 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 157 transitions.
[2023-11-12 02:28:03,840 INFO  L78                 Accepts]: Start accepts. Automaton has 101 states and 157 transitions. Word has length 198
[2023-11-12 02:28:03,843 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-12 02:28:03,843 INFO  L495      AbstractCegarLoop]: Abstraction has 101 states and 157 transitions.
[2023-11-12 02:28:03,843 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30)
[2023-11-12 02:28:03,844 INFO  L276                IsEmpty]: Start isEmpty. Operand 101 states and 157 transitions.
[2023-11-12 02:28:03,848 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 200
[2023-11-12 02:28:03,848 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-12 02:28:03,848 INFO  L195           NwaCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-12 02:28:03,859 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0
[2023-11-12 02:28:04,055 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2
[2023-11-12 02:28:04,055 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-12 02:28:04,055 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-12 02:28:04,056 INFO  L85        PathProgramCache]: Analyzing trace with hash -1920160855, now seen corresponding path program 1 times
[2023-11-12 02:28:04,056 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-12 02:28:04,056 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009236356]
[2023-11-12 02:28:04,056 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:28:04,056 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-12 02:28:04,109 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-12 02:28:04,109 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [751767079]
[2023-11-12 02:28:04,109 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:28:04,110 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-12 02:28:04,110 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/z3
[2023-11-12 02:28:04,111 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-12 02:28:04,136 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-12 02:28:04,302 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:28:04,305 INFO  L262         TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 2 conjunts are in the unsatisfiable core
[2023-11-12 02:28:04,310 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-12 02:28:04,640 INFO  L134       CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked.
[2023-11-12 02:28:04,640 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-12 02:28:04,640 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-12 02:28:04,640 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009236356]
[2023-11-12 02:28:04,641 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-12 02:28:04,641 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751767079]
[2023-11-12 02:28:04,641 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [751767079] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-12 02:28:04,641 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-12 02:28:04,641 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-12 02:28:04,642 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970842615]
[2023-11-12 02:28:04,642 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-12 02:28:04,643 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-12 02:28:04,643 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-12 02:28:04,644 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-12 02:28:04,644 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-12 02:28:04,644 INFO  L87              Difference]: Start difference. First operand 101 states and 157 transitions. Second operand  has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 1 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30)
[2023-11-12 02:28:04,707 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-12 02:28:04,707 INFO  L93              Difference]: Finished difference Result 297 states and 465 transitions.
[2023-11-12 02:28:04,708 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-12 02:28:04,708 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 1 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30) Word has length 199
[2023-11-12 02:28:04,709 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-12 02:28:04,711 INFO  L225             Difference]: With dead ends: 297
[2023-11-12 02:28:04,711 INFO  L226             Difference]: Without dead ends: 199
[2023-11-12 02:28:04,712 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-12 02:28:04,714 INFO  L413           NwaCegarLoop]: 146 mSDtfsCounter, 51 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-12 02:28:04,714 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 284 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-12 02:28:04,715 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 199 states.
[2023-11-12 02:28:04,744 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 196.
[2023-11-12 02:28:04,746 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 196 states, 133 states have (on average 1.3984962406015038) internal successors, (186), 133 states have internal predecessors, (186), 60 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60)
[2023-11-12 02:28:04,748 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 306 transitions.
[2023-11-12 02:28:04,748 INFO  L78                 Accepts]: Start accepts. Automaton has 196 states and 306 transitions. Word has length 199
[2023-11-12 02:28:04,749 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-12 02:28:04,749 INFO  L495      AbstractCegarLoop]: Abstraction has 196 states and 306 transitions.
[2023-11-12 02:28:04,750 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 1 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30)
[2023-11-12 02:28:04,750 INFO  L276                IsEmpty]: Start isEmpty. Operand 196 states and 306 transitions.
[2023-11-12 02:28:04,753 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 201
[2023-11-12 02:28:04,753 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-12 02:28:04,754 INFO  L195           NwaCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-12 02:28:04,764 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2023-11-12 02:28:04,960 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-12 02:28:04,961 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-12 02:28:04,961 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-12 02:28:04,962 INFO  L85        PathProgramCache]: Analyzing trace with hash 1569162716, now seen corresponding path program 1 times
[2023-11-12 02:28:04,962 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-12 02:28:04,962 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255403489]
[2023-11-12 02:28:04,962 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:28:04,962 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-12 02:28:05,027 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-12 02:28:05,027 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2114568333]
[2023-11-12 02:28:05,028 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:28:05,028 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-12 02:28:05,028 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/z3
[2023-11-12 02:28:05,029 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-12 02:28:05,064 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-12 02:28:05,243 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:28:05,247 INFO  L262         TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 3 conjunts are in the unsatisfiable core
[2023-11-12 02:28:05,253 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-12 02:28:05,690 INFO  L134       CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked.
[2023-11-12 02:28:05,691 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-12 02:28:05,691 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-12 02:28:05,691 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255403489]
[2023-11-12 02:28:05,692 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-12 02:28:05,693 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114568333]
[2023-11-12 02:28:05,697 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114568333] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-12 02:28:05,697 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-12 02:28:05,698 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-12 02:28:05,698 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623595702]
[2023-11-12 02:28:05,699 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-12 02:28:05,700 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-12 02:28:05,700 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-12 02:28:05,702 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-12 02:28:05,702 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2023-11-12 02:28:05,709 INFO  L87              Difference]: Start difference. First operand 196 states and 306 transitions. Second operand  has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30)
[2023-11-12 02:28:05,999 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-12 02:28:05,999 INFO  L93              Difference]: Finished difference Result 490 states and 764 transitions.
[2023-11-12 02:28:06,000 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-12 02:28:06,000 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30) Word has length 200
[2023-11-12 02:28:06,001 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-12 02:28:06,007 INFO  L225             Difference]: With dead ends: 490
[2023-11-12 02:28:06,007 INFO  L226             Difference]: Without dead ends: 297
[2023-11-12 02:28:06,009 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2023-11-12 02:28:06,012 INFO  L413           NwaCegarLoop]: 262 mSDtfsCounter, 221 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-11-12 02:28:06,014 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 476 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-11-12 02:28:06,018 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 297 states.
[2023-11-12 02:28:06,085 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 207.
[2023-11-12 02:28:06,087 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 207 states, 144 states have (on average 1.3888888888888888) internal successors, (200), 144 states have internal predecessors, (200), 60 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60)
[2023-11-12 02:28:06,089 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 320 transitions.
[2023-11-12 02:28:06,089 INFO  L78                 Accepts]: Start accepts. Automaton has 207 states and 320 transitions. Word has length 200
[2023-11-12 02:28:06,090 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-12 02:28:06,091 INFO  L495      AbstractCegarLoop]: Abstraction has 207 states and 320 transitions.
[2023-11-12 02:28:06,091 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30)
[2023-11-12 02:28:06,092 INFO  L276                IsEmpty]: Start isEmpty. Operand 207 states and 320 transitions.
[2023-11-12 02:28:06,096 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 201
[2023-11-12 02:28:06,096 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-12 02:28:06,098 INFO  L195           NwaCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-12 02:28:06,108 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2023-11-12 02:28:06,305 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-12 02:28:06,305 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-12 02:28:06,306 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-12 02:28:06,306 INFO  L85        PathProgramCache]: Analyzing trace with hash 1176135706, now seen corresponding path program 1 times
[2023-11-12 02:28:06,306 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-12 02:28:06,307 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596743731]
[2023-11-12 02:28:06,307 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:28:06,307 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-12 02:28:06,373 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-12 02:28:06,375 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [996256962]
[2023-11-12 02:28:06,375 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:28:06,375 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-12 02:28:06,376 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/z3
[2023-11-12 02:28:06,377 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-12 02:28:06,390 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d20e8ba-39ff-4c82-9629-8acc410a1577/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-12 02:28:06,761 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:28:06,765 INFO  L262         TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 36 conjunts are in the unsatisfiable core
[2023-11-12 02:28:06,775 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-12 02:28:25,896 INFO  L134       CoverageAnalysis]: Checked inductivity of 1740 backedges. 1134 proven. 180 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked.
[2023-11-12 02:28:25,896 INFO  L327         TraceCheckSpWp]: Computing backward predicates...