./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/geo1-ll_unwindbound20.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version 04d6fb36
Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/geo1-ll_unwindbound20.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --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 41de47755c46f2f4de69961f8458c254f5c62632809005d7de26bd26c8032b2a --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1
--- Real Ultimate output ---
This is Ultimate 0.2.4-tmp.dk.referee-eval-04d6fb3-m
[2024-09-15 19:18:37,539 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2024-09-15 19:18:37,609 INFO  L114        SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf
[2024-09-15 19:18:37,614 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2024-09-15 19:18:37,615 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2024-09-15 19:18:37,637 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2024-09-15 19:18:37,637 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2024-09-15 19:18:37,638 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2024-09-15 19:18:37,638 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2024-09-15 19:18:37,639 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2024-09-15 19:18:37,639 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2024-09-15 19:18:37,639 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2024-09-15 19:18:37,641 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2024-09-15 19:18:37,642 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2024-09-15 19:18:37,643 INFO  L153        SettingsManager]:  * Use SBE=true
[2024-09-15 19:18:37,643 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2024-09-15 19:18:37,643 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2024-09-15 19:18:37,644 INFO  L153        SettingsManager]:  * sizeof long=4
[2024-09-15 19:18:37,644 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2024-09-15 19:18:37,646 INFO  L153        SettingsManager]:  * sizeof POINTER=4
[2024-09-15 19:18:37,646 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2024-09-15 19:18:37,647 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2024-09-15 19:18:37,647 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2024-09-15 19:18:37,647 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2024-09-15 19:18:37,648 INFO  L153        SettingsManager]:  * Allow undefined functions=false
[2024-09-15 19:18:37,648 INFO  L153        SettingsManager]:  * sizeof long double=12
[2024-09-15 19:18:37,648 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2024-09-15 19:18:37,648 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2024-09-15 19:18:37,649 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2024-09-15 19:18:37,649 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2024-09-15 19:18:37,649 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2024-09-15 19:18:37,649 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2024-09-15 19:18:37,649 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2024-09-15 19:18:37,659 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2024-09-15 19:18:37,659 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2024-09-15 19:18:37,659 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2024-09-15 19:18:37,659 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2024-09-15 19:18:37,660 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2024-09-15 19:18:37,660 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2024-09-15 19:18:37,660 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2024-09-15 19:18:37,660 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2024-09-15 19:18:37,661 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2024-09-15 19:18:37,661 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:/storage/repos/certificate-witnesses-artifact/automizer/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 -> /storage/repos/certificate-witnesses-artifact/automizer
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 -> 41de47755c46f2f4de69961f8458c254f5c62632809005d7de26bd26c8032b2a
Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1
[2024-09-15 19:18:37,960 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2024-09-15 19:18:37,987 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2024-09-15 19:18:37,991 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2024-09-15 19:18:37,993 INFO  L270        PluginConnector]: Initializing CDTParser...
[2024-09-15 19:18:37,994 INFO  L274        PluginConnector]: CDTParser initialized
[2024-09-15 19:18:37,995 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/geo1-ll_unwindbound20.c
[2024-09-15 19:18:39,658 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2024-09-15 19:18:39,851 INFO  L384              CDTParser]: Found 1 translation units.
[2024-09-15 19:18:39,851 INFO  L180              CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/geo1-ll_unwindbound20.c
[2024-09-15 19:18:39,865 INFO  L427              CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/002bdbc79/8f520819d99f40898f80af1d3b576df8/FLAG0198b7a41
[2024-09-15 19:18:39,882 INFO  L435              CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/002bdbc79/8f520819d99f40898f80af1d3b576df8
[2024-09-15 19:18:39,885 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2024-09-15 19:18:39,887 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2024-09-15 19:18:39,890 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2024-09-15 19:18:39,891 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2024-09-15 19:18:39,895 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2024-09-15 19:18:39,896 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:18:39" (1/1) ...
[2024-09-15 19:18:39,897 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@473f2249 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:18:39, skipping insertion in model container
[2024-09-15 19:18:39,897 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:18:39" (1/1) ...
[2024-09-15 19:18:39,918 INFO  L175         MainTranslator]: Built tables and reachable declarations
[2024-09-15 19:18:40,097 WARN  L248   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/geo1-ll_unwindbound20.c[546,559]
[2024-09-15 19:18:40,126 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-09-15 19:18:40,136 INFO  L200         MainTranslator]: Completed pre-run
[2024-09-15 19:18:40,147 WARN  L248   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/geo1-ll_unwindbound20.c[546,559]
[2024-09-15 19:18:40,153 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-09-15 19:18:40,171 INFO  L204         MainTranslator]: Completed translation
[2024-09-15 19:18:40,172 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:18:40 WrapperNode
[2024-09-15 19:18:40,172 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2024-09-15 19:18:40,174 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2024-09-15 19:18:40,174 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2024-09-15 19:18:40,174 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2024-09-15 19:18:40,180 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:18:40" (1/1) ...
[2024-09-15 19:18:40,186 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:18:40" (1/1) ...
[2024-09-15 19:18:40,192 INFO  L138                Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0
[2024-09-15 19:18:40,192 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2024-09-15 19:18:40,193 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2024-09-15 19:18:40,193 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2024-09-15 19:18:40,193 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2024-09-15 19:18:40,202 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:18:40" (1/1) ...
[2024-09-15 19:18:40,203 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:18:40" (1/1) ...
[2024-09-15 19:18:40,204 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:18:40" (1/1) ...
[2024-09-15 19:18:40,221 INFO  L175           MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0].
[2024-09-15 19:18:40,221 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:18:40" (1/1) ...
[2024-09-15 19:18:40,222 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:18:40" (1/1) ...
[2024-09-15 19:18:40,228 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:18:40" (1/1) ...
[2024-09-15 19:18:40,233 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:18:40" (1/1) ...
[2024-09-15 19:18:40,233 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:18:40" (1/1) ...
[2024-09-15 19:18:40,234 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:18:40" (1/1) ...
[2024-09-15 19:18:40,236 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2024-09-15 19:18:40,240 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2024-09-15 19:18:40,240 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2024-09-15 19:18:40,240 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2024-09-15 19:18:40,241 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:18:40" (1/1) ...
[2024-09-15 19:18:40,248 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2024-09-15 19:18:40,262 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3
[2024-09-15 19:18:40,277 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null)
[2024-09-15 19:18:40,280 INFO  L327       MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process
[2024-09-15 19:18:40,333 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2024-09-15 19:18:40,333 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2024-09-15 19:18:40,333 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2024-09-15 19:18:40,333 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2024-09-15 19:18:40,334 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2024-09-15 19:18:40,334 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#0
[2024-09-15 19:18:40,334 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2024-09-15 19:18:40,335 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2024-09-15 19:18:40,335 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2024-09-15 19:18:40,336 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2024-09-15 19:18:40,336 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2024-09-15 19:18:40,336 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2024-09-15 19:18:40,415 INFO  L242             CfgBuilder]: Building ICFG
[2024-09-15 19:18:40,417 INFO  L268             CfgBuilder]: Building CFG for each procedure with an implementation
[2024-09-15 19:18:40,587 INFO  L?                        ?]: Removed 7 outVars from TransFormulas that were not future-live.
[2024-09-15 19:18:40,588 INFO  L291             CfgBuilder]: Performing block encoding
[2024-09-15 19:18:40,619 INFO  L313             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2024-09-15 19:18:40,621 INFO  L318             CfgBuilder]: Removed 1 assume(true) statements.
[2024-09-15 19:18:40,622 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:18:40 BoogieIcfgContainer
[2024-09-15 19:18:40,622 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2024-09-15 19:18:40,626 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2024-09-15 19:18:40,626 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2024-09-15 19:18:40,629 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2024-09-15 19:18:40,630 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 07:18:39" (1/3) ...
[2024-09-15 19:18:40,631 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b920d34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:18:40, skipping insertion in model container
[2024-09-15 19:18:40,631 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:18:40" (2/3) ...
[2024-09-15 19:18:40,632 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b920d34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:18:40, skipping insertion in model container
[2024-09-15 19:18:40,632 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:18:40" (3/3) ...
[2024-09-15 19:18:40,635 INFO  L112   eAbstractionObserver]: Analyzing ICFG geo1-ll_unwindbound20.c
[2024-09-15 19:18:40,651 INFO  L209   ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2024-09-15 19:18:40,652 INFO  L149   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2024-09-15 19:18:40,715 INFO  L335      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2024-09-15 19:18:40,724 INFO  L336      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@7691f779, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-09-15 19:18:40,725 INFO  L337      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2024-09-15 19:18:40,731 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)
[2024-09-15 19:18:40,740 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2024-09-15 19:18:40,740 INFO  L208           NwaCegarLoop]: Found error trace
[2024-09-15 19:18:40,741 INFO  L216           NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-09-15 19:18:40,742 INFO  L399      AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-09-15 19:18:40,748 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2024-09-15 19:18:40,749 INFO  L85        PathProgramCache]: Analyzing trace with hash 1666515900, now seen corresponding path program 1 times
[2024-09-15 19:18:40,758 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-09-15 19:18:40,759 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040819989]
[2024-09-15 19:18:40,759 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-09-15 19:18:40,760 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-09-15 19:18:40,874 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-15 19:18:40,950 INFO  L381   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2024-09-15 19:18:40,964 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-15 19:18:40,978 INFO  L381   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2024-09-15 19:18:40,981 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-15 19:18:40,985 INFO  L381   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2024-09-15 19:18:40,989 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-15 19:18:40,996 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2024-09-15 19:18:41,000 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-09-15 19:18:41,001 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040819989]
[2024-09-15 19:18:41,002 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040819989] provided 1 perfect and 0 imperfect interpolant sequences
[2024-09-15 19:18:41,003 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-09-15 19:18:41,004 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2024-09-15 19:18:41,005 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334818050]
[2024-09-15 19:18:41,006 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-09-15 19:18:41,010 INFO  L551      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2024-09-15 19:18:41,010 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2024-09-15 19:18:41,033 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2024-09-15 19:18:41,034 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2024-09-15 19:18:41,036 INFO  L87              Difference]: Start difference. First operand  has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand  has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2024-09-15 19:18:41,123 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-09-15 19:18:41,124 INFO  L93              Difference]: Finished difference Result 51 states and 67 transitions.
[2024-09-15 19:18:41,125 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2024-09-15 19:18:41,126 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22
[2024-09-15 19:18:41,126 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-09-15 19:18:41,131 INFO  L225             Difference]: With dead ends: 51
[2024-09-15 19:18:41,131 INFO  L226             Difference]: Without dead ends: 25
[2024-09-15 19:18:41,134 INFO  L433           NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2024-09-15 19:18:41,137 INFO  L434           NwaCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2024-09-15 19:18:41,138 INFO  L435           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2024-09-15 19:18:41,152 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25 states.
[2024-09-15 19:18:41,173 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24.
[2024-09-15 19:18:41,174 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2024-09-15 19:18:41,177 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions.
[2024-09-15 19:18:41,179 INFO  L78                 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22
[2024-09-15 19:18:41,181 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-09-15 19:18:41,181 INFO  L474      AbstractCegarLoop]: Abstraction has 24 states and 27 transitions.
[2024-09-15 19:18:41,182 INFO  L475      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2024-09-15 19:18:41,182 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2024-09-15 19:18:41,186 INFO  L276                IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions.
[2024-09-15 19:18:41,187 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2024-09-15 19:18:41,188 INFO  L208           NwaCegarLoop]: Found error trace
[2024-09-15 19:18:41,188 INFO  L216           NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-09-15 19:18:41,188 WARN  L456      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2024-09-15 19:18:41,188 INFO  L399      AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-09-15 19:18:41,189 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2024-09-15 19:18:41,189 INFO  L85        PathProgramCache]: Analyzing trace with hash -387848543, now seen corresponding path program 1 times
[2024-09-15 19:18:41,189 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-09-15 19:18:41,190 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539742232]
[2024-09-15 19:18:41,190 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-09-15 19:18:41,193 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-09-15 19:18:41,245 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unknown
[2024-09-15 19:18:41,252 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1245048653]
[2024-09-15 19:18:41,252 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-09-15 19:18:41,252 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-09-15 19:18:41,252 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3
[2024-09-15 19:18:41,257 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-09-15 19:18:41,259 INFO  L327       MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2024-09-15 19:18:41,322 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-15 19:18:41,324 INFO  L262         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjuncts are in the unsatisfiable core
[2024-09-15 19:18:41,330 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2024-09-15 19:18:41,410 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2024-09-15 19:18:41,410 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2024-09-15 19:18:41,411 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-09-15 19:18:41,411 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539742232]
[2024-09-15 19:18:41,412 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2024-09-15 19:18:41,413 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245048653]
[2024-09-15 19:18:41,413 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245048653] provided 1 perfect and 0 imperfect interpolant sequences
[2024-09-15 19:18:41,413 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-09-15 19:18:41,413 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2024-09-15 19:18:41,414 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355566517]
[2024-09-15 19:18:41,414 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-09-15 19:18:41,415 INFO  L551      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2024-09-15 19:18:41,416 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2024-09-15 19:18:41,417 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2024-09-15 19:18:41,417 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2024-09-15 19:18:41,418 INFO  L87              Difference]: Start difference. First operand 24 states and 27 transitions. Second operand  has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3)
[2024-09-15 19:18:41,489 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-09-15 19:18:41,489 INFO  L93              Difference]: Finished difference Result 35 states and 40 transitions.
[2024-09-15 19:18:41,490 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2024-09-15 19:18:41,491 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22
[2024-09-15 19:18:41,491 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-09-15 19:18:41,492 INFO  L225             Difference]: With dead ends: 35
[2024-09-15 19:18:41,492 INFO  L226             Difference]: Without dead ends: 33
[2024-09-15 19:18:41,493 INFO  L433           NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2024-09-15 19:18:41,494 INFO  L434           NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2024-09-15 19:18:41,495 INFO  L435           NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 81 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2024-09-15 19:18:41,497 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 33 states.
[2024-09-15 19:18:41,507 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31.
[2024-09-15 19:18:41,508 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5)
[2024-09-15 19:18:41,511 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions.
[2024-09-15 19:18:41,511 INFO  L78                 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22
[2024-09-15 19:18:41,512 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-09-15 19:18:41,512 INFO  L474      AbstractCegarLoop]: Abstraction has 31 states and 35 transitions.
[2024-09-15 19:18:41,513 INFO  L475      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3)
[2024-09-15 19:18:41,515 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2024-09-15 19:18:41,515 INFO  L276                IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions.
[2024-09-15 19:18:41,515 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2024-09-15 19:18:41,516 INFO  L208           NwaCegarLoop]: Found error trace
[2024-09-15 19:18:41,516 INFO  L216           NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-09-15 19:18:41,530 INFO  L552       MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2024-09-15 19:18:41,716 WARN  L456      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-09-15 19:18:41,717 INFO  L399      AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-09-15 19:18:41,717 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2024-09-15 19:18:41,717 INFO  L85        PathProgramCache]: Analyzing trace with hash 783720481, now seen corresponding path program 1 times
[2024-09-15 19:18:41,718 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-09-15 19:18:41,718 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253976628]
[2024-09-15 19:18:41,718 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-09-15 19:18:41,718 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-09-15 19:18:41,744 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-15 19:18:41,917 INFO  L381   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2024-09-15 19:18:41,920 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-15 19:18:41,938 INFO  L381   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2024-09-15 19:18:41,940 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-15 19:18:41,949 INFO  L381   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2024-09-15 19:18:41,955 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-15 19:18:41,962 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2024-09-15 19:18:41,966 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-09-15 19:18:41,966 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253976628]
[2024-09-15 19:18:41,967 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253976628] provided 1 perfect and 0 imperfect interpolant sequences
[2024-09-15 19:18:41,967 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-09-15 19:18:41,967 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2024-09-15 19:18:41,967 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277046048]
[2024-09-15 19:18:41,967 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-09-15 19:18:41,968 INFO  L551      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2024-09-15 19:18:41,970 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2024-09-15 19:18:41,970 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2024-09-15 19:18:41,971 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2024-09-15 19:18:41,971 INFO  L87              Difference]: Start difference. First operand 31 states and 35 transitions. Second operand  has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3)
[2024-09-15 19:18:42,054 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-09-15 19:18:42,054 INFO  L93              Difference]: Finished difference Result 39 states and 42 transitions.
[2024-09-15 19:18:42,054 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2024-09-15 19:18:42,055 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23
[2024-09-15 19:18:42,055 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-09-15 19:18:42,057 INFO  L225             Difference]: With dead ends: 39
[2024-09-15 19:18:42,058 INFO  L226             Difference]: Without dead ends: 31
[2024-09-15 19:18:42,058 INFO  L433           NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2024-09-15 19:18:42,060 INFO  L434           NwaCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2024-09-15 19:18:42,061 INFO  L435           NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 37 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2024-09-15 19:18:42,062 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 31 states.
[2024-09-15 19:18:42,072 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31.
[2024-09-15 19:18:42,076 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 31 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5)
[2024-09-15 19:18:42,076 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions.
[2024-09-15 19:18:42,077 INFO  L78                 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23
[2024-09-15 19:18:42,077 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-09-15 19:18:42,077 INFO  L474      AbstractCegarLoop]: Abstraction has 31 states and 34 transitions.
[2024-09-15 19:18:42,077 INFO  L475      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3)
[2024-09-15 19:18:42,078 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2024-09-15 19:18:42,078 INFO  L276                IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions.
[2024-09-15 19:18:42,080 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2024-09-15 19:18:42,080 INFO  L208           NwaCegarLoop]: Found error trace
[2024-09-15 19:18:42,080 INFO  L216           NwaCegarLoop]: trace histogram [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]
[2024-09-15 19:18:42,081 WARN  L456      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2024-09-15 19:18:42,081 INFO  L399      AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-09-15 19:18:42,081 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2024-09-15 19:18:42,082 INFO  L85        PathProgramCache]: Analyzing trace with hash -1293449266, now seen corresponding path program 1 times
[2024-09-15 19:18:42,082 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-09-15 19:18:42,082 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199983149]
[2024-09-15 19:18:42,082 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-09-15 19:18:42,082 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-09-15 19:18:42,118 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-15 19:18:42,346 INFO  L381   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2024-09-15 19:18:42,348 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-15 19:18:42,350 INFO  L381   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2024-09-15 19:18:42,351 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-15 19:18:42,353 INFO  L381   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2024-09-15 19:18:42,356 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-15 19:18:42,358 INFO  L381   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18
[2024-09-15 19:18:42,361 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-15 19:18:42,397 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2024-09-15 19:18:42,398 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-09-15 19:18:42,398 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199983149]
[2024-09-15 19:18:42,398 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199983149] provided 0 perfect and 1 imperfect interpolant sequences
[2024-09-15 19:18:42,398 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931712578]
[2024-09-15 19:18:42,398 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-09-15 19:18:42,399 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-09-15 19:18:42,399 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3
[2024-09-15 19:18:42,401 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-09-15 19:18:42,403 INFO  L327       MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2024-09-15 19:18:42,457 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-15 19:18:42,458 INFO  L262         TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjuncts are in the unsatisfiable core
[2024-09-15 19:18:42,461 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2024-09-15 19:18:42,673 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2024-09-15 19:18:42,673 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2024-09-15 19:18:42,863 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2024-09-15 19:18:42,864 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931712578] provided 0 perfect and 2 imperfect interpolant sequences
[2024-09-15 19:18:42,864 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2024-09-15 19:18:42,864 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 13
[2024-09-15 19:18:42,864 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845430764]
[2024-09-15 19:18:42,865 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2024-09-15 19:18:42,865 INFO  L551      AbstractCegarLoop]: INTERPOLANT automaton has 13 states
[2024-09-15 19:18:42,865 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2024-09-15 19:18:42,866 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2024-09-15 19:18:42,866 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156
[2024-09-15 19:18:42,867 INFO  L87              Difference]: Start difference. First operand 31 states and 34 transitions. Second operand  has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5)
[2024-09-15 19:18:47,061 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2024-09-15 19:18:47,121 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-09-15 19:18:47,122 INFO  L93              Difference]: Finished difference Result 45 states and 50 transitions.
[2024-09-15 19:18:47,122 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2024-09-15 19:18:47,122 INFO  L78                 Accepts]: Start accepts. Automaton has  has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 29
[2024-09-15 19:18:47,123 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-09-15 19:18:47,123 INFO  L225             Difference]: With dead ends: 45
[2024-09-15 19:18:47,123 INFO  L226             Difference]: Without dead ends: 39
[2024-09-15 19:18:47,124 INFO  L433           NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306
[2024-09-15 19:18:47,124 INFO  L434           NwaCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time
[2024-09-15 19:18:47,125 INFO  L435           NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 101 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 144 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time]
[2024-09-15 19:18:47,127 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 39 states.
[2024-09-15 19:18:47,140 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39.
[2024-09-15 19:18:47,140 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 39 states, 25 states have (on average 1.08) internal successors, (27), 27 states have internal predecessors, (27), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6)
[2024-09-15 19:18:47,141 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions.
[2024-09-15 19:18:47,142 INFO  L78                 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 29
[2024-09-15 19:18:47,142 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-09-15 19:18:47,143 INFO  L474      AbstractCegarLoop]: Abstraction has 39 states and 41 transitions.
[2024-09-15 19:18:47,143 INFO  L475      AbstractCegarLoop]: INTERPOLANT automaton has  has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5)
[2024-09-15 19:18:47,144 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2024-09-15 19:18:47,147 INFO  L276                IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions.
[2024-09-15 19:18:47,147 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 39
[2024-09-15 19:18:47,148 INFO  L208           NwaCegarLoop]: Found error trace
[2024-09-15 19:18:47,148 INFO  L216           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-09-15 19:18:47,164 INFO  L552       MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2024-09-15 19:18:47,348 WARN  L456      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-09-15 19:18:47,349 INFO  L399      AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-09-15 19:18:47,349 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2024-09-15 19:18:47,349 INFO  L85        PathProgramCache]: Analyzing trace with hash -1959775791, now seen corresponding path program 1 times
[2024-09-15 19:18:47,349 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-09-15 19:18:47,350 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906245431]
[2024-09-15 19:18:47,350 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-09-15 19:18:47,350 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-09-15 19:18:47,405 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unknown
[2024-09-15 19:18:47,408 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1174383252]
[2024-09-15 19:18:47,411 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-09-15 19:18:47,411 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-09-15 19:18:47,411 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3
[2024-09-15 19:18:47,413 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-09-15 19:18:47,415 INFO  L327       MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2024-09-15 19:18:47,475 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-15 19:18:47,480 INFO  L262         TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 28 conjuncts are in the unsatisfiable core
[2024-09-15 19:18:47,483 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2024-09-15 19:18:47,682 INFO  L134       CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked.
[2024-09-15 19:18:47,683 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2024-09-15 19:19:01,629 INFO  L134       CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 10 times theorem prover too weak. 8 trivial. 0 not checked.
[2024-09-15 19:19:01,631 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-09-15 19:19:01,631 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906245431]
[2024-09-15 19:19:01,631 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2024-09-15 19:19:01,631 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174383252]
[2024-09-15 19:19:01,631 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174383252] provided 0 perfect and 2 imperfect interpolant sequences
[2024-09-15 19:19:01,631 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2024-09-15 19:19:01,632 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15
[2024-09-15 19:19:01,632 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122665428]
[2024-09-15 19:19:01,632 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2024-09-15 19:19:01,632 INFO  L551      AbstractCegarLoop]: INTERPOLANT automaton has 15 states
[2024-09-15 19:19:01,633 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2024-09-15 19:19:01,633 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2024-09-15 19:19:01,634 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=166, Unknown=3, NotChecked=0, Total=210
[2024-09-15 19:19:01,635 INFO  L87              Difference]: Start difference. First operand 39 states and 41 transitions. Second operand  has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9)
[2024-09-15 19:19:11,672 WARN  L293               SmtUtils]: Spent 8.85s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)
[2024-09-15 19:19:15,695 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2024-09-15 19:19:32,270 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2024-09-15 19:19:36,313 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2024-09-15 19:19:40,510 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.19s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2024-09-15 19:19:44,522 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2024-09-15 19:19:48,534 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2024-09-15 19:19:52,537 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2024-09-15 19:20:12,683 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2024-09-15 19:20:16,686 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2024-09-15 19:20:20,696 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2024-09-15 19:20:24,701 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2024-09-15 19:20:28,724 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2024-09-15 19:20:32,729 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2024-09-15 19:20:36,740 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2024-09-15 19:20:40,743 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2024-09-15 19:20:44,765 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2024-09-15 19:20:48,825 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2024-09-15 19:20:52,832 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2024-09-15 19:20:52,846 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-09-15 19:20:52,846 INFO  L93              Difference]: Finished difference Result 66 states and 75 transitions.
[2024-09-15 19:20:52,847 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2024-09-15 19:20:52,847 INFO  L78                 Accepts]: Start accepts. Automaton has  has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 38
[2024-09-15 19:20:52,847 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-09-15 19:20:52,849 INFO  L225             Difference]: With dead ends: 66
[2024-09-15 19:20:52,849 INFO  L226             Difference]: Without dead ends: 64
[2024-09-15 19:20:52,849 INFO  L433           NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 52.0s TimeCoverageRelationStatistics Valid=74, Invalid=259, Unknown=9, NotChecked=0, Total=342
[2024-09-15 19:20:52,850 INFO  L434           NwaCegarLoop]: 22 mSDtfsCounter, 30 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 12 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 72.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 72.7s IncrementalHoareTripleChecker+Time
[2024-09-15 19:20:52,850 INFO  L435           NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 214 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 150 Invalid, 18 Unknown, 0 Unchecked, 72.7s Time]
[2024-09-15 19:20:52,854 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 64 states.
[2024-09-15 19:20:52,882 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59.
[2024-09-15 19:20:52,882 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 59 states, 40 states have (on average 1.15) internal successors, (46), 42 states have internal predecessors, (46), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10)
[2024-09-15 19:20:52,887 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions.
[2024-09-15 19:20:52,887 INFO  L78                 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 38
[2024-09-15 19:20:52,888 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-09-15 19:20:52,889 INFO  L474      AbstractCegarLoop]: Abstraction has 59 states and 68 transitions.
[2024-09-15 19:20:52,889 INFO  L475      AbstractCegarLoop]: INTERPOLANT automaton has  has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9)
[2024-09-15 19:20:52,890 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2024-09-15 19:20:52,890 INFO  L276                IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions.
[2024-09-15 19:20:52,890 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 40
[2024-09-15 19:20:52,890 INFO  L208           NwaCegarLoop]: Found error trace
[2024-09-15 19:20:52,891 INFO  L216           NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-09-15 19:20:52,909 INFO  L552       MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0
[2024-09-15 19:20:53,096 WARN  L456      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-09-15 19:20:53,097 INFO  L399      AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-09-15 19:20:53,097 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2024-09-15 19:20:53,097 INFO  L85        PathProgramCache]: Analyzing trace with hash -701383951, now seen corresponding path program 1 times
[2024-09-15 19:20:53,098 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-09-15 19:20:53,098 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584979940]
[2024-09-15 19:20:53,098 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-09-15 19:20:53,098 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-09-15 19:20:53,116 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-15 19:20:53,258 INFO  L381   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2024-09-15 19:20:53,260 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-15 19:20:53,267 INFO  L381   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2024-09-15 19:20:53,268 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-15 19:20:53,270 INFO  L381   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2024-09-15 19:20:53,271 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-15 19:20:53,275 INFO  L381   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18
[2024-09-15 19:20:53,281 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-15 19:20:53,285 INFO  L381   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26
[2024-09-15 19:20:53,287 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-15 19:20:53,291 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked.
[2024-09-15 19:20:53,291 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-09-15 19:20:53,291 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584979940]
[2024-09-15 19:20:53,291 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584979940] provided 0 perfect and 1 imperfect interpolant sequences
[2024-09-15 19:20:53,292 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450355673]
[2024-09-15 19:20:53,292 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-09-15 19:20:53,292 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-09-15 19:20:53,292 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3
[2024-09-15 19:20:53,294 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-09-15 19:20:53,295 INFO  L327       MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2024-09-15 19:20:53,337 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-15 19:20:53,338 INFO  L262         TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjuncts are in the unsatisfiable core
[2024-09-15 19:20:53,340 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2024-09-15 19:20:53,400 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2024-09-15 19:20:53,401 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2024-09-15 19:20:53,491 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked.
[2024-09-15 19:20:53,492 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450355673] provided 0 perfect and 2 imperfect interpolant sequences
[2024-09-15 19:20:53,492 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2024-09-15 19:20:53,492 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 13
[2024-09-15 19:20:53,492 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350114927]
[2024-09-15 19:20:53,492 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2024-09-15 19:20:53,493 INFO  L551      AbstractCegarLoop]: INTERPOLANT automaton has 13 states
[2024-09-15 19:20:53,493 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2024-09-15 19:20:53,494 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2024-09-15 19:20:53,494 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156
[2024-09-15 19:20:53,494 INFO  L87              Difference]: Start difference. First operand 59 states and 68 transitions. Second operand  has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 9 states have call successors, (18), 8 states have call predecessors, (18), 6 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15)
[2024-09-15 19:20:53,723 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-09-15 19:20:53,724 INFO  L93              Difference]: Finished difference Result 79 states and 84 transitions.
[2024-09-15 19:20:53,724 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. 
[2024-09-15 19:20:53,724 INFO  L78                 Accepts]: Start accepts. Automaton has  has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 9 states have call successors, (18), 8 states have call predecessors, (18), 6 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) Word has length 39
[2024-09-15 19:20:53,726 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-09-15 19:20:53,729 INFO  L225             Difference]: With dead ends: 79
[2024-09-15 19:20:53,729 INFO  L226             Difference]: Without dead ends: 71
[2024-09-15 19:20:53,730 INFO  L433           NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506
[2024-09-15 19:20:53,731 INFO  L434           NwaCegarLoop]: 12 mSDtfsCounter, 48 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2024-09-15 19:20:53,731 INFO  L435           NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 48 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2024-09-15 19:20:53,733 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 71 states.
[2024-09-15 19:20:53,764 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71.
[2024-09-15 19:20:53,766 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 71 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 51 states have internal predecessors, (51), 12 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10)
[2024-09-15 19:20:53,766 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions.
[2024-09-15 19:20:53,767 INFO  L78                 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 39
[2024-09-15 19:20:53,767 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-09-15 19:20:53,767 INFO  L474      AbstractCegarLoop]: Abstraction has 71 states and 73 transitions.
[2024-09-15 19:20:53,767 INFO  L475      AbstractCegarLoop]: INTERPOLANT automaton has  has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 9 states have call successors, (18), 8 states have call predecessors, (18), 6 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15)
[2024-09-15 19:20:53,767 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2024-09-15 19:20:53,768 INFO  L276                IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions.
[2024-09-15 19:20:53,772 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 71
[2024-09-15 19:20:53,772 INFO  L208           NwaCegarLoop]: Found error trace
[2024-09-15 19:20:53,772 INFO  L216           NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-09-15 19:20:53,791 INFO  L552       MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0
[2024-09-15 19:20:53,973 WARN  L456      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-09-15 19:20:53,974 INFO  L399      AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-09-15 19:20:53,977 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2024-09-15 19:20:53,977 INFO  L85        PathProgramCache]: Analyzing trace with hash 1815586865, now seen corresponding path program 2 times
[2024-09-15 19:20:53,977 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-09-15 19:20:53,977 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348458265]
[2024-09-15 19:20:53,977 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-09-15 19:20:53,977 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-09-15 19:20:54,083 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unknown
[2024-09-15 19:20:54,086 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1173162398]
[2024-09-15 19:20:54,086 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2024-09-15 19:20:54,086 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-09-15 19:20:54,086 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3
[2024-09-15 19:20:54,088 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-09-15 19:20:54,089 INFO  L327       MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2024-09-15 19:20:54,242 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2024-09-15 19:20:54,242 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2024-09-15 19:20:54,244 INFO  L262         TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 40 conjuncts are in the unsatisfiable core
[2024-09-15 19:20:54,247 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2024-09-15 19:20:54,886 INFO  L134       CoverageAnalysis]: Checked inductivity of 154 backedges. 12 proven. 81 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked.
[2024-09-15 19:20:54,886 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2024-09-15 19:22:49,064 INFO  L134       CoverageAnalysis]: Checked inductivity of 154 backedges. 12 proven. 0 refuted. 78 times theorem prover too weak. 64 trivial. 0 not checked.
[2024-09-15 19:22:49,064 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-09-15 19:22:49,064 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348458265]
[2024-09-15 19:22:49,065 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2024-09-15 19:22:49,065 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173162398]
[2024-09-15 19:22:49,065 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173162398] provided 0 perfect and 2 imperfect interpolant sequences
[2024-09-15 19:22:49,065 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2024-09-15 19:22:49,065 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24
[2024-09-15 19:22:49,065 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853864204]
[2024-09-15 19:22:49,065 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2024-09-15 19:22:49,067 INFO  L551      AbstractCegarLoop]: INTERPOLANT automaton has 24 states
[2024-09-15 19:22:49,067 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2024-09-15 19:22:49,068 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants.
[2024-09-15 19:22:49,069 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=417, Unknown=24, NotChecked=0, Total=552
[2024-09-15 19:22:49,069 INFO  L87              Difference]: Start difference. First operand 71 states and 73 transitions. Second operand  has 24 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 21 states have internal predecessors, (59), 17 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (17), 14 states have call predecessors, (17), 15 states have call successors, (17)
[2024-09-15 19:22:53,160 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2024-09-15 19:22:58,072 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2024-09-15 19:23:02,085 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []