./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c --full-output --architecture 32bit
--------------------------------------------------------------------------------
Checking for memory safety (deref-memtrack)
Using default analysis
Version 8393723b
Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) )
CHECK( init(main()), LTL(G valid-deref) )
CHECK( init(main()), LTL(G valid-memtrack) )
--witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3a80fea07b3dad363ac033c87feb8bfcf28a57d2e75bc95b67f90908b133efe1
--- Real Ultimate output ---
[0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset.
This is Ultimate 0.2.2-dev-8393723
[2022-11-19 06:54:37,062 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2022-11-19 06:54:37,064 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2022-11-19 06:54:37,084 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-11-19 06:54:37,085 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-11-19 06:54:37,086 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-11-19 06:54:37,087 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-11-19 06:54:37,089 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2022-11-19 06:54:37,091 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-11-19 06:54:37,092 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-11-19 06:54:37,093 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2022-11-19 06:54:37,095 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-11-19 06:54:37,095 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-11-19 06:54:37,096 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-11-19 06:54:37,098 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-11-19 06:54:37,099 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-11-19 06:54:37,100 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-11-19 06:54:37,101 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-11-19 06:54:37,103 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-11-19 06:54:37,105 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2022-11-19 06:54:37,107 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-11-19 06:54:37,108 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-11-19 06:54:37,110 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2022-11-19 06:54:37,111 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-11-19 06:54:37,114 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-11-19 06:54:37,115 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-11-19 06:54:37,115 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-11-19 06:54:37,116 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-11-19 06:54:37,117 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-11-19 06:54:37,118 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-11-19 06:54:37,118 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-11-19 06:54:37,121 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-11-19 06:54:37,122 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-11-19 06:54:37,130 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2022-11-19 06:54:37,131 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-11-19 06:54:37,132 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2022-11-19 06:54:37,132 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-11-19 06:54:37,133 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-11-19 06:54:37,133 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2022-11-19 06:54:37,134 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2022-11-19 06:54:37,134 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2022-11-19 06:54:37,135 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf
[2022-11-19 06:54:37,176 INFO L113 SettingsManager]: Loading preferences was successful
[2022-11-19 06:54:37,187 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2022-11-19 06:54:37,187 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-11-19 06:54:37,187 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-11-19 06:54:37,188 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2022-11-19 06:54:37,188 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2022-11-19 06:54:37,188 INFO L138 SettingsManager]: * User list type=DISABLED
[2022-11-19 06:54:37,189 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2022-11-19 06:54:37,189 INFO L138 SettingsManager]: * Explicit value domain=true
[2022-11-19 06:54:37,189 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2022-11-19 06:54:37,189 INFO L138 SettingsManager]: * Octagon Domain=false
[2022-11-19 06:54:37,190 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain
[2022-11-19 06:54:37,190 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true
[2022-11-19 06:54:37,190 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true
[2022-11-19 06:54:37,190 INFO L138 SettingsManager]: * Interval Domain=false
[2022-11-19 06:54:37,190 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults:
[2022-11-19 06:54:37,191 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer
[2022-11-19 06:54:37,191 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC
[2022-11-19 06:54:37,191 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-11-19 06:54:37,191 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2022-11-19 06:54:37,192 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-11-19 06:54:37,192 INFO L138 SettingsManager]: * sizeof long=4
[2022-11-19 06:54:37,192 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false
[2022-11-19 06:54:37,192 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2022-11-19 06:54:37,192 INFO L138 SettingsManager]: * sizeof POINTER=4
[2022-11-19 06:54:37,193 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2022-11-19 06:54:37,193 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true
[2022-11-19 06:54:37,193 INFO L138 SettingsManager]: * Bitprecise bitfields=true
[2022-11-19 06:54:37,195 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true
[2022-11-19 06:54:37,195 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-11-19 06:54:37,195 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true
[2022-11-19 06:54:37,196 INFO L138 SettingsManager]: * sizeof long double=12
[2022-11-19 06:54:37,196 INFO L138 SettingsManager]: * Use constant arrays=true
[2022-11-19 06:54:37,196 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-11-19 06:54:37,196 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2022-11-19 06:54:37,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-11-19 06:54:37,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-11-19 06:54:37,197 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES
[2022-11-19 06:54:37,198 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2022-11-19 06:54:37,198 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN
[2022-11-19 06:54:37,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-11-19 06:54:37,199 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2022-11-19 06:54:37,199 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) )
CHECK( init(main()), LTL(G valid-deref) )
CHECK( init(main()), LTL(G valid-memtrack) )
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a80fea07b3dad363ac033c87feb8bfcf28a57d2e75bc95b67f90908b133efe1
[2022-11-19 06:54:37,468 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2022-11-19 06:54:37,497 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-11-19 06:54:37,501 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-11-19 06:54:37,502 INFO L271 PluginConnector]: Initializing CDTParser...
[2022-11-19 06:54:37,503 INFO L275 PluginConnector]: CDTParser initialized
[2022-11-19 06:54:37,504 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c
[2022-11-19 06:54:37,583 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/data/311948ac3/86597da6b60c44c0b479a40e039bc192/FLAG21224a130
[2022-11-19 06:54:37,992 INFO L306 CDTParser]: Found 1 translation units.
[2022-11-19 06:54:37,993 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c
[2022-11-19 06:54:38,000 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/data/311948ac3/86597da6b60c44c0b479a40e039bc192/FLAG21224a130
[2022-11-19 06:54:38,405 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/data/311948ac3/86597da6b60c44c0b479a40e039bc192
[2022-11-19 06:54:38,410 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-11-19 06:54:38,413 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements.
[2022-11-19 06:54:38,420 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-11-19 06:54:38,421 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-11-19 06:54:38,424 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2022-11-19 06:54:38,425 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:54:38" (1/1) ...
[2022-11-19 06:54:38,428 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22d1f40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:38, skipping insertion in model container
[2022-11-19 06:54:38,428 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:54:38" (1/1) ...
[2022-11-19 06:54:38,436 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2022-11-19 06:54:38,452 INFO L178 MainTranslator]: Built tables and reachable declarations
[2022-11-19 06:54:38,625 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c[502,515]
[2022-11-19 06:54:38,645 INFO L210 PostProcessor]: Analyzing one entry point: main
[2022-11-19 06:54:38,655 INFO L203 MainTranslator]: Completed pre-run
[2022-11-19 06:54:38,667 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c[502,515]
[2022-11-19 06:54:38,676 INFO L210 PostProcessor]: Analyzing one entry point: main
[2022-11-19 06:54:38,691 INFO L208 MainTranslator]: Completed translation
[2022-11-19 06:54:38,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:38 WrapperNode
[2022-11-19 06:54:38,691 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-11-19 06:54:38,692 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-11-19 06:54:38,693 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-11-19 06:54:38,693 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized
[2022-11-19 06:54:38,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:38" (1/1) ...
[2022-11-19 06:54:38,709 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:38" (1/1) ...
[2022-11-19 06:54:38,727 INFO L138 Inliner]: procedures = 19, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 39
[2022-11-19 06:54:38,731 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-11-19 06:54:38,732 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-11-19 06:54:38,732 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2022-11-19 06:54:38,732 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2022-11-19 06:54:38,742 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:38" (1/1) ...
[2022-11-19 06:54:38,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:38" (1/1) ...
[2022-11-19 06:54:38,757 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:38" (1/1) ...
[2022-11-19 06:54:38,759 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:38" (1/1) ...
[2022-11-19 06:54:38,765 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:38" (1/1) ...
[2022-11-19 06:54:38,772 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:38" (1/1) ...
[2022-11-19 06:54:38,774 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:38" (1/1) ...
[2022-11-19 06:54:38,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:38" (1/1) ...
[2022-11-19 06:54:38,777 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-11-19 06:54:38,778 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-11-19 06:54:38,778 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2022-11-19 06:54:38,778 INFO L275 PluginConnector]: RCFGBuilder initialized
[2022-11-19 06:54:38,781 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:38" (1/1) ...
[2022-11-19 06:54:38,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-11-19 06:54:38,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3
[2022-11-19 06:54:38,811 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2022-11-19 06:54:38,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2022-11-19 06:54:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-11-19 06:54:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2022-11-19 06:54:38,849 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2022-11-19 06:54:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2022-11-19 06:54:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure check
[2022-11-19 06:54:38,849 INFO L138 BoogieDeclarations]: Found implementation of procedure check
[2022-11-19 06:54:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2022-11-19 06:54:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-11-19 06:54:38,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-11-19 06:54:38,850 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2022-11-19 06:54:38,850 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2022-11-19 06:54:38,850 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2022-11-19 06:54:38,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2022-11-19 06:54:38,948 INFO L235 CfgBuilder]: Building ICFG
[2022-11-19 06:54:38,950 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation
[2022-11-19 06:54:39,239 INFO L276 CfgBuilder]: Performing block encoding
[2022-11-19 06:54:39,301 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-11-19 06:54:39,302 INFO L300 CfgBuilder]: Removed 0 assume(true) statements.
[2022-11-19 06:54:39,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:54:39 BoogieIcfgContainer
[2022-11-19 06:54:39,304 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-11-19 06:54:39,306 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-11-19 06:54:39,306 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2022-11-19 06:54:39,323 INFO L275 PluginConnector]: TraceAbstraction initialized
[2022-11-19 06:54:39,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:54:38" (1/3) ...
[2022-11-19 06:54:39,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4db64540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:54:39, skipping insertion in model container
[2022-11-19 06:54:39,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:38" (2/3) ...
[2022-11-19 06:54:39,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4db64540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:54:39, skipping insertion in model container
[2022-11-19 06:54:39,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:54:39" (3/3) ...
[2022-11-19 06:54:39,325 INFO L112 eAbstractionObserver]: Analyzing ICFG elimination_max_rec_onepoint.c
[2022-11-19 06:54:39,344 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-11-19 06:54:39,344 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations.
[2022-11-19 06:54:39,392 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-11-19 06:54:39,399 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, 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;@4f27bc80, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2022-11-19 06:54:39,400 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations.
[2022-11-19 06:54:39,404 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 25 states have (on average 1.76) internal successors, (44), 42 states have internal predecessors, (44), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)
[2022-11-19 06:54:39,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2022-11-19 06:54:39,412 INFO L187 NwaCegarLoop]: Found error trace
[2022-11-19 06:54:39,413 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-19 06:54:39,413 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] ===
[2022-11-19 06:54:39,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-19 06:54:39,419 INFO L85 PathProgramCache]: Analyzing trace with hash -579726195, now seen corresponding path program 1 times
[2022-11-19 06:54:39,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-19 06:54:39,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706223009]
[2022-11-19 06:54:39,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:39,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-19 06:54:39,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:40,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-11-19 06:54:40,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-19 06:54:40,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706223009]
[2022-11-19 06:54:40,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706223009] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-19 06:54:40,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-19 06:54:40,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2022-11-19 06:54:40,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148586279]
[2022-11-19 06:54:40,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-19 06:54:40,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2022-11-19 06:54:40,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-19 06:54:40,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2022-11-19 06:54:40,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2022-11-19 06:54:40,177 INFO L87 Difference]: Start difference. First operand has 54 states, 25 states have (on average 1.76) internal successors, (44), 42 states have internal predecessors, (44), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)
[2022-11-19 06:54:40,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-19 06:54:40,406 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions.
[2022-11-19 06:54:40,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2022-11-19 06:54:40,409 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16
[2022-11-19 06:54:40,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-19 06:54:40,417 INFO L225 Difference]: With dead ends: 83
[2022-11-19 06:54:40,418 INFO L226 Difference]: Without dead ends: 82
[2022-11-19 06:54:40,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2022-11-19 06:54:40,423 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 34 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-11-19 06:54:40,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 202 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-11-19 06:54:40,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states.
[2022-11-19 06:54:40,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72.
[2022-11-19 06:54:40,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 54 states have internal predecessors, (64), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12)
[2022-11-19 06:54:40,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions.
[2022-11-19 06:54:40,468 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 16
[2022-11-19 06:54:40,469 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-11-19 06:54:40,469 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions.
[2022-11-19 06:54:40,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)
[2022-11-19 06:54:40,469 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions.
[2022-11-19 06:54:40,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2022-11-19 06:54:40,471 INFO L187 NwaCegarLoop]: Found error trace
[2022-11-19 06:54:40,471 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-19 06:54:40,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-11-19 06:54:40,472 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] ===
[2022-11-19 06:54:40,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-19 06:54:40,473 INFO L85 PathProgramCache]: Analyzing trace with hash -581203377, now seen corresponding path program 1 times
[2022-11-19 06:54:40,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-19 06:54:40,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11474195]
[2022-11-19 06:54:40,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:40,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-19 06:54:40,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:40,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-11-19 06:54:40,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-19 06:54:40,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11474195]
[2022-11-19 06:54:40,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11474195] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-19 06:54:40,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-19 06:54:40,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-11-19 06:54:40,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155901245]
[2022-11-19 06:54:40,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-19 06:54:40,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-19 06:54:40,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-19 06:54:40,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-19 06:54:40,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-19 06:54:40,546 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2022-11-19 06:54:40,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-19 06:54:40,590 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions.
[2022-11-19 06:54:40,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2022-11-19 06:54:40,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 16
[2022-11-19 06:54:40,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-19 06:54:40,592 INFO L225 Difference]: With dead ends: 69
[2022-11-19 06:54:40,592 INFO L226 Difference]: Without dead ends: 69
[2022-11-19 06:54:40,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-19 06:54:40,594 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-11-19 06:54:40,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 71 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-11-19 06:54:40,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states.
[2022-11-19 06:54:40,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69.
[2022-11-19 06:54:40,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 38 states have (on average 1.605263157894737) internal successors, (61), 51 states have internal predecessors, (61), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12)
[2022-11-19 06:54:40,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions.
[2022-11-19 06:54:40,605 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 16
[2022-11-19 06:54:40,605 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-11-19 06:54:40,605 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions.
[2022-11-19 06:54:40,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2022-11-19 06:54:40,606 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions.
[2022-11-19 06:54:40,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2022-11-19 06:54:40,606 INFO L187 NwaCegarLoop]: Found error trace
[2022-11-19 06:54:40,607 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-19 06:54:40,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-11-19 06:54:40,607 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] ===
[2022-11-19 06:54:40,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-19 06:54:40,608 INFO L85 PathProgramCache]: Analyzing trace with hash -581203376, now seen corresponding path program 1 times
[2022-11-19 06:54:40,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-19 06:54:40,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788550534]
[2022-11-19 06:54:40,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:40,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-19 06:54:40,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:41,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-11-19 06:54:41,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-19 06:54:41,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788550534]
[2022-11-19 06:54:41,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788550534] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-19 06:54:41,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-19 06:54:41,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2022-11-19 06:54:41,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534948398]
[2022-11-19 06:54:41,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-19 06:54:41,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-11-19 06:54:41,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-19 06:54:41,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-11-19 06:54:41,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2022-11-19 06:54:41,143 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand has 8 states, 5 states have (on average 2.0) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3)
[2022-11-19 06:54:41,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-19 06:54:41,450 INFO L93 Difference]: Finished difference Result 74 states and 91 transitions.
[2022-11-19 06:54:41,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2022-11-19 06:54:41,451 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 2.0) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 16
[2022-11-19 06:54:41,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-19 06:54:41,452 INFO L225 Difference]: With dead ends: 74
[2022-11-19 06:54:41,452 INFO L226 Difference]: Without dead ends: 74
[2022-11-19 06:54:41,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2022-11-19 06:54:41,454 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 42 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-11-19 06:54:41,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 140 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-11-19 06:54:41,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states.
[2022-11-19 06:54:41,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72.
[2022-11-19 06:54:41,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 53 states have internal predecessors, (63), 12 states have call successors, (12), 5 states have call predecessors, (12), 6 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13)
[2022-11-19 06:54:41,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions.
[2022-11-19 06:54:41,464 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 16
[2022-11-19 06:54:41,464 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-11-19 06:54:41,464 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions.
[2022-11-19 06:54:41,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 2.0) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3)
[2022-11-19 06:54:41,465 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions.
[2022-11-19 06:54:41,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2022-11-19 06:54:41,466 INFO L187 NwaCegarLoop]: Found error trace
[2022-11-19 06:54:41,466 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-19 06:54:41,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2022-11-19 06:54:41,466 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] ===
[2022-11-19 06:54:41,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-19 06:54:41,467 INFO L85 PathProgramCache]: Analyzing trace with hash -837432789, now seen corresponding path program 1 times
[2022-11-19 06:54:41,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-19 06:54:41,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659678442]
[2022-11-19 06:54:41,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:41,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-19 06:54:41,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:41,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-11-19 06:54:41,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-19 06:54:41,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659678442]
[2022-11-19 06:54:41,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659678442] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-19 06:54:41,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-19 06:54:41,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2022-11-19 06:54:41,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709482894]
[2022-11-19 06:54:41,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-19 06:54:41,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-11-19 06:54:41,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-19 06:54:41,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-11-19 06:54:41,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2022-11-19 06:54:41,641 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2022-11-19 06:54:41,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-19 06:54:41,782 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions.
[2022-11-19 06:54:41,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2022-11-19 06:54:41,783 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 17
[2022-11-19 06:54:41,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-19 06:54:41,786 INFO L225 Difference]: With dead ends: 82
[2022-11-19 06:54:41,786 INFO L226 Difference]: Without dead ends: 82
[2022-11-19 06:54:41,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72
[2022-11-19 06:54:41,794 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 34 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-11-19 06:54:41,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 116 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-11-19 06:54:41,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states.
[2022-11-19 06:54:41,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 73.
[2022-11-19 06:54:41,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 42 states have (on average 1.5238095238095237) internal successors, (64), 54 states have internal predecessors, (64), 12 states have call successors, (12), 5 states have call predecessors, (12), 6 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13)
[2022-11-19 06:54:41,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions.
[2022-11-19 06:54:41,811 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 17
[2022-11-19 06:54:41,811 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-11-19 06:54:41,811 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions.
[2022-11-19 06:54:41,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2022-11-19 06:54:41,812 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions.
[2022-11-19 06:54:41,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2022-11-19 06:54:41,813 INFO L187 NwaCegarLoop]: Found error trace
[2022-11-19 06:54:41,813 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-19 06:54:41,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2022-11-19 06:54:41,814 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] ===
[2022-11-19 06:54:41,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-19 06:54:41,814 INFO L85 PathProgramCache]: Analyzing trace with hash -519129844, now seen corresponding path program 1 times
[2022-11-19 06:54:41,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-19 06:54:41,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286074537]
[2022-11-19 06:54:41,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:41,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-19 06:54:41,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:42,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-11-19 06:54:42,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-19 06:54:42,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286074537]
[2022-11-19 06:54:42,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286074537] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-19 06:54:42,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-19 06:54:42,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2022-11-19 06:54:42,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318099876]
[2022-11-19 06:54:42,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-19 06:54:42,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-11-19 06:54:42,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-19 06:54:42,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-11-19 06:54:42,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2022-11-19 06:54:42,011 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2022-11-19 06:54:42,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-19 06:54:42,155 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions.
[2022-11-19 06:54:42,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2022-11-19 06:54:42,156 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21
[2022-11-19 06:54:42,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-19 06:54:42,158 INFO L225 Difference]: With dead ends: 77
[2022-11-19 06:54:42,158 INFO L226 Difference]: Without dead ends: 77
[2022-11-19 06:54:42,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110
[2022-11-19 06:54:42,159 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 35 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-11-19 06:54:42,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 213 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-11-19 06:54:42,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states.
[2022-11-19 06:54:42,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77.
[2022-11-19 06:54:42,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 45 states have (on average 1.488888888888889) internal successors, (67), 57 states have internal predecessors, (67), 12 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13)
[2022-11-19 06:54:42,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 92 transitions.
[2022-11-19 06:54:42,166 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 92 transitions. Word has length 21
[2022-11-19 06:54:42,167 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-11-19 06:54:42,167 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 92 transitions.
[2022-11-19 06:54:42,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2022-11-19 06:54:42,167 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 92 transitions.
[2022-11-19 06:54:42,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2022-11-19 06:54:42,168 INFO L187 NwaCegarLoop]: Found error trace
[2022-11-19 06:54:42,168 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-19 06:54:42,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2022-11-19 06:54:42,169 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting checkErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] ===
[2022-11-19 06:54:42,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-19 06:54:42,170 INFO L85 PathProgramCache]: Analyzing trace with hash -433157022, now seen corresponding path program 1 times
[2022-11-19 06:54:42,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-19 06:54:42,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199410314]
[2022-11-19 06:54:42,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:42,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-19 06:54:42,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:42,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-11-19 06:54:42,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-19 06:54:42,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199410314]
[2022-11-19 06:54:42,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199410314] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-19 06:54:42,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814762944]
[2022-11-19 06:54:42,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:42,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-19 06:54:42,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3
[2022-11-19 06:54:42,469 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-19 06:54:42,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-11-19 06:54:42,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:42,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 27 conjunts are in the unsatisfiable core
[2022-11-19 06:54:42,559 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-11-19 06:54:42,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5
[2022-11-19 06:54:43,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-11-19 06:54:43,095 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-11-19 06:54:43,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-11-19 06:54:43,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814762944] provided 0 perfect and 2 imperfect interpolant sequences
[2022-11-19 06:54:43,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [889433028]
[2022-11-19 06:54:43,483 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest
[2022-11-19 06:54:43,483 INFO L166 IcfgInterpreter]: Building call graph
[2022-11-19 06:54:43,488 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2022-11-19 06:54:43,494 INFO L176 IcfgInterpreter]: Starting interpretation
[2022-11-19 06:54:43,495 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2022-11-19 06:54:43,678 INFO L190 IndexEqualityManager]: detected not equals via solver
[2022-11-19 06:54:43,680 INFO L190 IndexEqualityManager]: detected not equals via solver
[2022-11-19 06:54:43,681 INFO L190 IndexEqualityManager]: detected not equals via solver
[2022-11-19 06:54:43,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34
[2022-11-19 06:54:43,704 INFO L190 IndexEqualityManager]: detected not equals via solver
[2022-11-19 06:54:43,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22
[2022-11-19 06:54:43,780 INFO L190 IndexEqualityManager]: detected not equals via solver
[2022-11-19 06:54:43,782 INFO L190 IndexEqualityManager]: detected not equals via solver
[2022-11-19 06:54:43,804 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size
[2022-11-19 06:54:43,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45
[2022-11-19 06:54:43,851 INFO L197 IcfgInterpreter]: Interpreting procedure check with input of size 81 for LOIs
[2022-11-19 06:54:44,323 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 81 for LOIs
[2022-11-19 06:54:44,401 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs
[2022-11-19 06:54:44,403 INFO L180 IcfgInterpreter]: Interpretation finished
[2022-11-19 06:54:46,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [889433028] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-19 06:54:46,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences.
[2022-11-19 06:54:46,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [7, 8, 7] total 31
[2022-11-19 06:54:46,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115157911]
[2022-11-19 06:54:46,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-19 06:54:46,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states
[2022-11-19 06:54:46,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-19 06:54:46,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2022-11-19 06:54:46,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992
[2022-11-19 06:54:46,956 INFO L87 Difference]: Start difference. First operand 77 states and 92 transitions. Second operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 9 states have internal predecessors, (11), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4)
[2022-11-19 06:54:47,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-19 06:54:47,403 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions.
[2022-11-19 06:54:47,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states.
[2022-11-19 06:54:47,404 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 10 states have (on average 1.1) internal successors, (11), 9 states have internal predecessors, (11), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 22
[2022-11-19 06:54:47,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-19 06:54:47,404 INFO L225 Difference]: With dead ends: 80
[2022-11-19 06:54:47,404 INFO L226 Difference]: Without dead ends: 66
[2022-11-19 06:54:47,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 33 SyntacticMatches, 8 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992
[2022-11-19 06:54:47,406 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 31 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-11-19 06:54:47,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 131 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 229 Invalid, 0 Unknown, 57 Unchecked, 0.4s Time]
[2022-11-19 06:54:47,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states.
[2022-11-19 06:54:47,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62.
[2022-11-19 06:54:47,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 35 states have (on average 1.4) internal successors, (49), 44 states have internal predecessors, (49), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11)
[2022-11-19 06:54:47,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions.
[2022-11-19 06:54:47,412 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 22
[2022-11-19 06:54:47,413 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-11-19 06:54:47,413 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions.
[2022-11-19 06:54:47,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 10 states have (on average 1.1) internal successors, (11), 9 states have internal predecessors, (11), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4)
[2022-11-19 06:54:47,413 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions.
[2022-11-19 06:54:47,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31
[2022-11-19 06:54:47,414 INFO L187 NwaCegarLoop]: Found error trace
[2022-11-19 06:54:47,414 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-19 06:54:47,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2022-11-19 06:54:47,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5
[2022-11-19 06:54:47,623 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] ===
[2022-11-19 06:54:47,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-19 06:54:47,624 INFO L85 PathProgramCache]: Analyzing trace with hash -186866169, now seen corresponding path program 1 times
[2022-11-19 06:54:47,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-19 06:54:47,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204227331]
[2022-11-19 06:54:47,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:47,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-19 06:54:47,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:48,051 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2022-11-19 06:54:48,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-19 06:54:48,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204227331]
[2022-11-19 06:54:48,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204227331] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-19 06:54:48,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020525593]
[2022-11-19 06:54:48,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:48,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-19 06:54:48,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3
[2022-11-19 06:54:48,053 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-19 06:54:48,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-11-19 06:54:48,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:48,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 25 conjunts are in the unsatisfiable core
[2022-11-19 06:54:48,146 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-11-19 06:54:48,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32
[2022-11-19 06:54:48,713 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-11-19 06:54:48,713 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-11-19 06:54:48,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38
[2022-11-19 06:54:49,054 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked.
[2022-11-19 06:54:49,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020525593] provided 1 perfect and 1 imperfect interpolant sequences
[2022-11-19 06:54:49,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences.
[2022-11-19 06:54:49,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10, 12] total 24
[2022-11-19 06:54:49,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873918947]
[2022-11-19 06:54:49,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-19 06:54:49,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-11-19 06:54:49,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-19 06:54:49,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-11-19 06:54:49,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552
[2022-11-19 06:54:49,057 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4)
[2022-11-19 06:54:49,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-19 06:54:49,195 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions.
[2022-11-19 06:54:49,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2022-11-19 06:54:49,196 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30
[2022-11-19 06:54:49,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-19 06:54:49,197 INFO L225 Difference]: With dead ends: 66
[2022-11-19 06:54:49,197 INFO L226 Difference]: Without dead ends: 66
[2022-11-19 06:54:49,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650
[2022-11-19 06:54:49,200 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 75 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-11-19 06:54:49,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 93 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-11-19 06:54:49,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states.
[2022-11-19 06:54:49,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66.
[2022-11-19 06:54:49,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 38 states have (on average 1.368421052631579) internal successors, (52), 47 states have internal predecessors, (52), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11)
[2022-11-19 06:54:49,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions.
[2022-11-19 06:54:49,217 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 30
[2022-11-19 06:54:49,217 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-11-19 06:54:49,217 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions.
[2022-11-19 06:54:49,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4)
[2022-11-19 06:54:49,218 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions.
[2022-11-19 06:54:49,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31
[2022-11-19 06:54:49,219 INFO L187 NwaCegarLoop]: Found error trace
[2022-11-19 06:54:49,219 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-19 06:54:49,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2022-11-19 06:54:49,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-19 06:54:49,426 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting checkErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] ===
[2022-11-19 06:54:49,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-19 06:54:49,426 INFO L85 PathProgramCache]: Analyzing trace with hash -188334095, now seen corresponding path program 1 times
[2022-11-19 06:54:49,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-19 06:54:49,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209379876]
[2022-11-19 06:54:49,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:49,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-19 06:54:49,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:49,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked.
[2022-11-19 06:54:49,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-19 06:54:49,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209379876]
[2022-11-19 06:54:49,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209379876] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-19 06:54:49,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-19 06:54:49,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-11-19 06:54:49,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718432151]
[2022-11-19 06:54:49,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-19 06:54:49,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-19 06:54:49,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-19 06:54:49,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-19 06:54:49,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-19 06:54:49,468 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)
[2022-11-19 06:54:49,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-19 06:54:49,503 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions.
[2022-11-19 06:54:49,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2022-11-19 06:54:49,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 30
[2022-11-19 06:54:49,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-19 06:54:49,504 INFO L225 Difference]: With dead ends: 65
[2022-11-19 06:54:49,504 INFO L226 Difference]: Without dead ends: 65
[2022-11-19 06:54:49,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-19 06:54:49,505 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 7 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-11-19 06:54:49,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 54 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-11-19 06:54:49,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states.
[2022-11-19 06:54:49,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63.
[2022-11-19 06:54:49,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 38 states have (on average 1.236842105263158) internal successors, (47), 44 states have internal predecessors, (47), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11)
[2022-11-19 06:54:49,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions.
[2022-11-19 06:54:49,519 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 30
[2022-11-19 06:54:49,520 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-11-19 06:54:49,520 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions.
[2022-11-19 06:54:49,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)
[2022-11-19 06:54:49,520 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions.
[2022-11-19 06:54:49,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31
[2022-11-19 06:54:49,523 INFO L187 NwaCegarLoop]: Found error trace
[2022-11-19 06:54:49,523 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-19 06:54:49,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2022-11-19 06:54:49,524 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting checkErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] ===
[2022-11-19 06:54:49,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-19 06:54:49,525 INFO L85 PathProgramCache]: Analyzing trace with hash -188334094, now seen corresponding path program 1 times
[2022-11-19 06:54:49,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-19 06:54:49,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103869422]
[2022-11-19 06:54:49,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:49,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-19 06:54:49,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:49,812 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-11-19 06:54:49,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-19 06:54:49,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103869422]
[2022-11-19 06:54:49,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103869422] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-19 06:54:49,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761914453]
[2022-11-19 06:54:49,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:49,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-19 06:54:49,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3
[2022-11-19 06:54:49,815 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-19 06:54:49,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2022-11-19 06:54:49,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:49,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 19 conjunts are in the unsatisfiable core
[2022-11-19 06:54:49,902 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-11-19 06:54:50,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-11-19 06:54:50,101 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-11-19 06:54:50,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26
[2022-11-19 06:54:50,367 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-11-19 06:54:50,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761914453] provided 0 perfect and 2 imperfect interpolant sequences
[2022-11-19 06:54:50,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2059391345]
[2022-11-19 06:54:50,370 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest
[2022-11-19 06:54:50,370 INFO L166 IcfgInterpreter]: Building call graph
[2022-11-19 06:54:50,371 FATAL L? ?]: Ignoring exception!
java.lang.IllegalArgumentException: Recursive programs are not supported.
at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132)
at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.<init>(CallGraph.java:97)
at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.<init>(IcfgInterpreter.java:92)
at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.<init>(SifaRunner.java:98)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77)
at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266)
at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147)
at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137)
at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.<init>(AutomatonFreeRefinementEngine.java:85)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.<init>(TraceAbstractionRefinementEngine.java:82)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.<init>(TraceAbstractionStarter.java:154)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
[2022-11-19 06:54:50,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-11-19 06:54:50,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18
[2022-11-19 06:54:50,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475893886]
[2022-11-19 06:54:50,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-11-19 06:54:50,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states
[2022-11-19 06:54:50,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-19 06:54:50,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2022-11-19 06:54:50,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342
[2022-11-19 06:54:50,376 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand has 19 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 9 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (12), 11 states have call predecessors, (12), 7 states have call successors, (12)
[2022-11-19 06:54:50,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-19 06:54:50,651 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions.
[2022-11-19 06:54:50,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states.
[2022-11-19 06:54:50,652 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 9 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (12), 11 states have call predecessors, (12), 7 states have call successors, (12) Word has length 30
[2022-11-19 06:54:50,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-19 06:54:50,653 INFO L225 Difference]: With dead ends: 71
[2022-11-19 06:54:50,653 INFO L226 Difference]: Without dead ends: 71
[2022-11-19 06:54:50,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462
[2022-11-19 06:54:50,654 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 40 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-11-19 06:54:50,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 254 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 242 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time]
[2022-11-19 06:54:50,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states.
[2022-11-19 06:54:50,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69.
[2022-11-19 06:54:50,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 49 states have internal predecessors, (51), 11 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13)
[2022-11-19 06:54:50,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions.
[2022-11-19 06:54:50,659 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 30
[2022-11-19 06:54:50,659 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-11-19 06:54:50,659 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions.
[2022-11-19 06:54:50,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 9 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (12), 11 states have call predecessors, (12), 7 states have call successors, (12)
[2022-11-19 06:54:50,660 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions.
[2022-11-19 06:54:50,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-11-19 06:54:50,660 INFO L187 NwaCegarLoop]: Found error trace
[2022-11-19 06:54:50,661 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-19 06:54:50,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2022-11-19 06:54:50,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-19 06:54:50,861 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting checkErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] ===
[2022-11-19 06:54:50,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-19 06:54:50,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1543388343, now seen corresponding path program 1 times
[2022-11-19 06:54:50,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-19 06:54:50,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207164064]
[2022-11-19 06:54:50,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:50,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-19 06:54:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:51,302 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2022-11-19 06:54:51,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-19 06:54:51,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207164064]
[2022-11-19 06:54:51,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207164064] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-19 06:54:51,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341171829]
[2022-11-19 06:54:51,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:51,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-19 06:54:51,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3
[2022-11-19 06:54:51,304 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-19 06:54:51,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2022-11-19 06:54:51,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:51,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core
[2022-11-19 06:54:51,393 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-11-19 06:54:51,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32
[2022-11-19 06:54:51,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2022-11-19 06:54:51,850 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-11-19 06:54:52,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38
[2022-11-19 06:54:52,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26
[2022-11-19 06:54:52,310 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2022-11-19 06:54:52,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341171829] provided 0 perfect and 2 imperfect interpolant sequences
[2022-11-19 06:54:52,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [853346001]
[2022-11-19 06:54:52,313 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest
[2022-11-19 06:54:52,314 INFO L166 IcfgInterpreter]: Building call graph
[2022-11-19 06:54:52,314 FATAL L? ?]: Ignoring exception!
java.lang.IllegalArgumentException: Recursive programs are not supported.
at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132)
at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.<init>(CallGraph.java:97)
at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.<init>(IcfgInterpreter.java:92)
at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.<init>(SifaRunner.java:98)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77)
at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266)
at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147)
at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137)
at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.<init>(AutomatonFreeRefinementEngine.java:85)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.<init>(TraceAbstractionRefinementEngine.java:82)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.<init>(TraceAbstractionStarter.java:154)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
[2022-11-19 06:54:52,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-11-19 06:54:52,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29
[2022-11-19 06:54:52,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488000644]
[2022-11-19 06:54:52,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-11-19 06:54:52,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states
[2022-11-19 06:54:52,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-19 06:54:52,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants.
[2022-11-19 06:54:52,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870
[2022-11-19 06:54:52,318 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand has 30 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 9 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11)
[2022-11-19 06:54:53,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-19 06:54:53,277 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions.
[2022-11-19 06:54:53,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states.
[2022-11-19 06:54:53,278 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 9 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 31
[2022-11-19 06:54:53,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-19 06:54:53,279 INFO L225 Difference]: With dead ends: 85
[2022-11-19 06:54:53,279 INFO L226 Difference]: Without dead ends: 85
[2022-11-19 06:54:53,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=202, Invalid=1358, Unknown=0, NotChecked=0, Total=1560
[2022-11-19 06:54:53,281 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 84 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-11-19 06:54:53,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 313 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 506 Invalid, 0 Unknown, 134 Unchecked, 0.5s Time]
[2022-11-19 06:54:53,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states.
[2022-11-19 06:54:53,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75.
[2022-11-19 06:54:53,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 53 states have internal predecessors, (58), 11 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13)
[2022-11-19 06:54:53,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions.
[2022-11-19 06:54:53,287 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 31
[2022-11-19 06:54:53,287 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-11-19 06:54:53,287 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions.
[2022-11-19 06:54:53,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 9 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11)
[2022-11-19 06:54:53,288 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions.
[2022-11-19 06:54:53,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36
[2022-11-19 06:54:53,288 INFO L187 NwaCegarLoop]: Found error trace
[2022-11-19 06:54:53,289 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-19 06:54:53,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2022-11-19 06:54:53,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9
[2022-11-19 06:54:53,494 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] ===
[2022-11-19 06:54:53,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-19 06:54:53,495 INFO L85 PathProgramCache]: Analyzing trace with hash 2103192050, now seen corresponding path program 1 times
[2022-11-19 06:54:53,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-19 06:54:53,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339886078]
[2022-11-19 06:54:53,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:53,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-19 06:54:53,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:53,709 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2022-11-19 06:54:53,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-19 06:54:53,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339886078]
[2022-11-19 06:54:53,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339886078] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-19 06:54:53,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264820860]
[2022-11-19 06:54:53,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:53,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-19 06:54:53,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3
[2022-11-19 06:54:53,711 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-19 06:54:53,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2022-11-19 06:54:53,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:53,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 28 conjunts are in the unsatisfiable core
[2022-11-19 06:54:53,832 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-11-19 06:54:53,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6
[2022-11-19 06:54:54,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23
[2022-11-19 06:54:54,221 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-11-19 06:54:54,221 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-11-19 06:54:56,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264820860] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-19 06:54:56,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [205339617]
[2022-11-19 06:54:56,342 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest
[2022-11-19 06:54:56,342 INFO L166 IcfgInterpreter]: Building call graph
[2022-11-19 06:54:56,342 FATAL L? ?]: Ignoring exception!
java.lang.IllegalArgumentException: Recursive programs are not supported.
at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132)
at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.<init>(CallGraph.java:97)
at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.<init>(IcfgInterpreter.java:92)
at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.<init>(SifaRunner.java:98)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77)
at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266)
at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147)
at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137)
at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.<init>(AutomatonFreeRefinementEngine.java:85)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.<init>(TraceAbstractionRefinementEngine.java:82)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.<init>(TraceAbstractionStarter.java:154)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
[2022-11-19 06:54:56,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-11-19 06:54:56,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20
[2022-11-19 06:54:56,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330198608]
[2022-11-19 06:54:56,343 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-11-19 06:54:56,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states
[2022-11-19 06:54:56,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-19 06:54:56,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2022-11-19 06:54:56,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506
[2022-11-19 06:54:56,345 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand has 20 states, 15 states have (on average 2.533333333333333) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10)
[2022-11-19 06:54:56,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-19 06:54:56,653 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions.
[2022-11-19 06:54:56,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states.
[2022-11-19 06:54:56,654 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 2.533333333333333) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 35
[2022-11-19 06:54:56,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-19 06:54:56,654 INFO L225 Difference]: With dead ends: 75
[2022-11-19 06:54:56,655 INFO L226 Difference]: Without dead ends: 75
[2022-11-19 06:54:56,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812
[2022-11-19 06:54:56,656 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 53 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-11-19 06:54:56,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 178 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 293 Invalid, 0 Unknown, 68 Unchecked, 0.2s Time]
[2022-11-19 06:54:56,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states.
[2022-11-19 06:54:56,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75.
[2022-11-19 06:54:56,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 48 states have (on average 1.1875) internal successors, (57), 52 states have internal predecessors, (57), 11 states have call successors, (11), 9 states have call predecessors, (11), 10 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13)
[2022-11-19 06:54:56,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions.
[2022-11-19 06:54:56,660 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 35
[2022-11-19 06:54:56,660 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-11-19 06:54:56,660 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions.
[2022-11-19 06:54:56,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 2.533333333333333) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10)
[2022-11-19 06:54:56,660 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions.
[2022-11-19 06:54:56,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37
[2022-11-19 06:54:56,661 INFO L187 NwaCegarLoop]: Found error trace
[2022-11-19 06:54:56,661 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-19 06:54:56,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2022-11-19 06:54:56,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10
[2022-11-19 06:54:56,862 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting checkErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] ===
[2022-11-19 06:54:56,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-19 06:54:56,862 INFO L85 PathProgramCache]: Analyzing trace with hash -480208292, now seen corresponding path program 1 times
[2022-11-19 06:54:56,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-19 06:54:56,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407842357]
[2022-11-19 06:54:56,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:56,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-19 06:54:56,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:57,333 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked.
[2022-11-19 06:54:57,333 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-19 06:54:57,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407842357]
[2022-11-19 06:54:57,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407842357] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-19 06:54:57,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837288509]
[2022-11-19 06:54:57,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:57,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-19 06:54:57,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3
[2022-11-19 06:54:57,335 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-19 06:54:57,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2022-11-19 06:54:57,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:57,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 29 conjunts are in the unsatisfiable core
[2022-11-19 06:54:57,431 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-11-19 06:54:57,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5
[2022-11-19 06:54:57,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32
[2022-11-19 06:54:57,884 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2022-11-19 06:54:57,884 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-11-19 06:54:57,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38
[2022-11-19 06:54:58,182 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked.
[2022-11-19 06:54:58,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837288509] provided 0 perfect and 2 imperfect interpolant sequences
[2022-11-19 06:54:58,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [22365198]
[2022-11-19 06:54:58,185 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest
[2022-11-19 06:54:58,187 INFO L166 IcfgInterpreter]: Building call graph
[2022-11-19 06:54:58,188 FATAL L? ?]: Ignoring exception!
java.lang.IllegalArgumentException: Recursive programs are not supported.
at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132)
at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.<init>(CallGraph.java:97)
at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.<init>(IcfgInterpreter.java:92)
at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.<init>(SifaRunner.java:98)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77)
at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266)
at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147)
at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137)
at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.<init>(AutomatonFreeRefinementEngine.java:85)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.<init>(TraceAbstractionRefinementEngine.java:82)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.<init>(TraceAbstractionStarter.java:154)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
[2022-11-19 06:54:58,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-11-19 06:54:58,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21
[2022-11-19 06:54:58,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756154771]
[2022-11-19 06:54:58,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-11-19 06:54:58,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states
[2022-11-19 06:54:58,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-19 06:54:58,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2022-11-19 06:54:58,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462
[2022-11-19 06:54:58,193 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 22 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 11 states have call successors, (20), 8 states have call predecessors, (20), 2 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14)
[2022-11-19 06:54:58,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-19 06:54:58,868 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions.
[2022-11-19 06:54:58,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states.
[2022-11-19 06:54:58,869 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 11 states have call successors, (20), 8 states have call predecessors, (20), 2 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 36
[2022-11-19 06:54:58,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-19 06:54:58,870 INFO L225 Difference]: With dead ends: 75
[2022-11-19 06:54:58,870 INFO L226 Difference]: Without dead ends: 75
[2022-11-19 06:54:58,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930
[2022-11-19 06:54:58,871 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 130 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-11-19 06:54:58,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 174 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 287 Invalid, 0 Unknown, 33 Unchecked, 0.2s Time]
[2022-11-19 06:54:58,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states.
[2022-11-19 06:54:58,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74.
[2022-11-19 06:54:58,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 51 states have internal predecessors, (56), 11 states have call successors, (11), 9 states have call predecessors, (11), 10 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13)
[2022-11-19 06:54:58,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions.
[2022-11-19 06:54:58,874 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 36
[2022-11-19 06:54:58,874 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-11-19 06:54:58,874 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions.
[2022-11-19 06:54:58,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 11 states have call successors, (20), 8 states have call predecessors, (20), 2 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14)
[2022-11-19 06:54:58,878 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions.
[2022-11-19 06:54:58,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37
[2022-11-19 06:54:58,880 INFO L187 NwaCegarLoop]: Found error trace
[2022-11-19 06:54:58,880 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-19 06:54:58,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0
[2022-11-19 06:54:59,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-19 06:54:59,085 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting checkErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] ===
[2022-11-19 06:54:59,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-19 06:54:59,086 INFO L85 PathProgramCache]: Analyzing trace with hash -480208293, now seen corresponding path program 1 times
[2022-11-19 06:54:59,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-19 06:54:59,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75789114]
[2022-11-19 06:54:59,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:59,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-19 06:54:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:59,156 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked.
[2022-11-19 06:54:59,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-19 06:54:59,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75789114]
[2022-11-19 06:54:59,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75789114] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-19 06:54:59,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-19 06:54:59,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-11-19 06:54:59,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645565034]
[2022-11-19 06:54:59,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-19 06:54:59,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-11-19 06:54:59,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-19 06:54:59,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-11-19 06:54:59,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-11-19 06:54:59,161 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6)
[2022-11-19 06:54:59,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-19 06:54:59,227 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions.
[2022-11-19 06:54:59,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2022-11-19 06:54:59,228 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 36
[2022-11-19 06:54:59,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-19 06:54:59,230 INFO L225 Difference]: With dead ends: 74
[2022-11-19 06:54:59,230 INFO L226 Difference]: Without dead ends: 74
[2022-11-19 06:54:59,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2022-11-19 06:54:59,232 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 24 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-11-19 06:54:59,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 74 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-11-19 06:54:59,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states.
[2022-11-19 06:54:59,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73.
[2022-11-19 06:54:59,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 50 states have internal predecessors, (55), 11 states have call successors, (11), 9 states have call predecessors, (11), 10 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13)
[2022-11-19 06:54:59,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions.
[2022-11-19 06:54:59,239 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 36
[2022-11-19 06:54:59,239 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-11-19 06:54:59,239 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions.
[2022-11-19 06:54:59,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6)
[2022-11-19 06:54:59,239 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions.
[2022-11-19 06:54:59,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38
[2022-11-19 06:54:59,240 INFO L187 NwaCegarLoop]: Found error trace
[2022-11-19 06:54:59,240 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-19 06:54:59,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12
[2022-11-19 06:54:59,241 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting checkErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] ===
[2022-11-19 06:54:59,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-19 06:54:59,241 INFO L85 PathProgramCache]: Analyzing trace with hash -2001555175, now seen corresponding path program 1 times
[2022-11-19 06:54:59,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-19 06:54:59,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665722312]
[2022-11-19 06:54:59,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:59,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-19 06:54:59,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:59,677 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked.
[2022-11-19 06:54:59,678 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-19 06:54:59,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665722312]
[2022-11-19 06:54:59,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665722312] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-19 06:54:59,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738708224]
[2022-11-19 06:54:59,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:59,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-19 06:54:59,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3
[2022-11-19 06:54:59,680 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-19 06:54:59,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2022-11-19 06:54:59,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:59,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 28 conjunts are in the unsatisfiable core
[2022-11-19 06:54:59,760 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-11-19 06:54:59,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5
[2022-11-19 06:55:00,006 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked.
[2022-11-19 06:55:00,006 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-11-19 06:55:00,490 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked.
[2022-11-19 06:55:00,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738708224] provided 0 perfect and 2 imperfect interpolant sequences
[2022-11-19 06:55:00,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1773614923]
[2022-11-19 06:55:00,493 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest
[2022-11-19 06:55:00,493 INFO L166 IcfgInterpreter]: Building call graph
[2022-11-19 06:55:00,493 FATAL L? ?]: Ignoring exception!
java.lang.IllegalArgumentException: Recursive programs are not supported.
at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132)
at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.<init>(CallGraph.java:97)
at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.<init>(IcfgInterpreter.java:92)
at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.<init>(SifaRunner.java:98)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77)
at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266)
at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147)
at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137)
at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.<init>(AutomatonFreeRefinementEngine.java:85)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.<init>(TraceAbstractionRefinementEngine.java:82)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.<init>(TraceAbstractionStarter.java:154)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
[2022-11-19 06:55:00,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-11-19 06:55:00,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 25
[2022-11-19 06:55:00,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992691602]
[2022-11-19 06:55:00,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-11-19 06:55:00,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states
[2022-11-19 06:55:00,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-19 06:55:00,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants.
[2022-11-19 06:55:00,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650
[2022-11-19 06:55:00,495 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand has 26 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 13 states have call successors, (20), 7 states have call predecessors, (20), 2 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14)
[2022-11-19 06:55:01,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-19 06:55:01,586 INFO L93 Difference]: Finished difference Result 91 states and 101 transitions.
[2022-11-19 06:55:01,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states.
[2022-11-19 06:55:01,586 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 13 states have call successors, (20), 7 states have call predecessors, (20), 2 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) Word has length 37
[2022-11-19 06:55:01,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-19 06:55:01,587 INFO L225 Difference]: With dead ends: 91
[2022-11-19 06:55:01,587 INFO L226 Difference]: Without dead ends: 91
[2022-11-19 06:55:01,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=227, Invalid=1255, Unknown=0, NotChecked=0, Total=1482
[2022-11-19 06:55:01,588 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 256 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-11-19 06:55:01,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 247 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-11-19 06:55:01,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states.
[2022-11-19 06:55:01,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88.
[2022-11-19 06:55:01,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 59 states have (on average 1.152542372881356) internal successors, (68), 60 states have internal predecessors, (68), 15 states have call successors, (15), 9 states have call predecessors, (15), 11 states have return successors, (18), 18 states have call predecessors, (18), 15 states have call successors, (18)
[2022-11-19 06:55:01,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions.
[2022-11-19 06:55:01,593 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 37
[2022-11-19 06:55:01,593 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-11-19 06:55:01,594 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions.
[2022-11-19 06:55:01,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 13 states have call successors, (20), 7 states have call predecessors, (20), 2 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14)
[2022-11-19 06:55:01,594 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions.
[2022-11-19 06:55:01,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43
[2022-11-19 06:55:01,598 INFO L187 NwaCegarLoop]: Found error trace
[2022-11-19 06:55:01,598 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-19 06:55:01,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0
[2022-11-19 06:55:01,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13
[2022-11-19 06:55:01,798 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] ===
[2022-11-19 06:55:01,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-19 06:55:01,799 INFO L85 PathProgramCache]: Analyzing trace with hash -289533904, now seen corresponding path program 1 times
[2022-11-19 06:55:01,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-19 06:55:01,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593378047]
[2022-11-19 06:55:01,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:55:01,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-19 06:55:01,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:55:02,602 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked.
[2022-11-19 06:55:02,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-19 06:55:02,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593378047]
[2022-11-19 06:55:02,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593378047] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-19 06:55:02,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440073936]
[2022-11-19 06:55:02,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:55:02,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-19 06:55:02,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3
[2022-11-19 06:55:02,604 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-19 06:55:02,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2022-11-19 06:55:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:55:02,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 19 conjunts are in the unsatisfiable core
[2022-11-19 06:55:02,687 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-11-19 06:55:02,981 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked.
[2022-11-19 06:55:02,981 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-11-19 06:55:03,090 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size
[2022-11-19 06:55:03,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 34
[2022-11-19 06:55:03,256 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked.
[2022-11-19 06:55:03,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440073936] provided 0 perfect and 2 imperfect interpolant sequences
[2022-11-19 06:55:03,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1640746544]
[2022-11-19 06:55:03,260 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest
[2022-11-19 06:55:03,260 INFO L166 IcfgInterpreter]: Building call graph
[2022-11-19 06:55:03,261 FATAL L? ?]: Ignoring exception!
java.lang.IllegalArgumentException: Recursive programs are not supported.
at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132)
at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.<init>(CallGraph.java:97)
at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.<init>(IcfgInterpreter.java:92)
at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.<init>(SifaRunner.java:98)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77)
at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266)
at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147)
at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137)
at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.<init>(AutomatonFreeRefinementEngine.java:85)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.<init>(TraceAbstractionRefinementEngine.java:82)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.<init>(TraceAbstractionStarter.java:154)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
[2022-11-19 06:55:03,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-11-19 06:55:03,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 6] total 21
[2022-11-19 06:55:03,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418559992]
[2022-11-19 06:55:03,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-11-19 06:55:03,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states
[2022-11-19 06:55:03,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-19 06:55:03,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2022-11-19 06:55:03,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462
[2022-11-19 06:55:03,264 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand has 22 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 8 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 9 states have call predecessors, (16), 8 states have call successors, (16)
[2022-11-19 06:55:04,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-19 06:55:04,312 INFO L93 Difference]: Finished difference Result 103 states and 118 transitions.
[2022-11-19 06:55:04,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states.
[2022-11-19 06:55:04,314 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 8 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 9 states have call predecessors, (16), 8 states have call successors, (16) Word has length 42
[2022-11-19 06:55:04,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-19 06:55:04,315 INFO L225 Difference]: With dead ends: 103
[2022-11-19 06:55:04,315 INFO L226 Difference]: Without dead ends: 84
[2022-11-19 06:55:04,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=172, Invalid=1234, Unknown=0, NotChecked=0, Total=1406
[2022-11-19 06:55:04,317 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 45 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-11-19 06:55:04,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 269 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 362 Invalid, 0 Unknown, 24 Unchecked, 0.3s Time]
[2022-11-19 06:55:04,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states.
[2022-11-19 06:55:04,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75.
[2022-11-19 06:55:04,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.14) internal successors, (57), 50 states have internal predecessors, (57), 14 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15)
[2022-11-19 06:55:04,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions.
[2022-11-19 06:55:04,322 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 42
[2022-11-19 06:55:04,322 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-11-19 06:55:04,322 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions.
[2022-11-19 06:55:04,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 8 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 9 states have call predecessors, (16), 8 states have call successors, (16)
[2022-11-19 06:55:04,323 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions.
[2022-11-19 06:55:04,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45
[2022-11-19 06:55:04,324 INFO L187 NwaCegarLoop]: Found error trace
[2022-11-19 06:55:04,324 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-19 06:55:04,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0
[2022-11-19 06:55:04,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14
[2022-11-19 06:55:04,534 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting checkErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] ===
[2022-11-19 06:55:04,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-19 06:55:04,535 INFO L85 PathProgramCache]: Analyzing trace with hash -462441492, now seen corresponding path program 2 times
[2022-11-19 06:55:04,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-19 06:55:04,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451018028]
[2022-11-19 06:55:04,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:55:04,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-19 06:55:04,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:55:05,117 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked.
[2022-11-19 06:55:05,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-19 06:55:05,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451018028]
[2022-11-19 06:55:05,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451018028] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-19 06:55:05,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292611544]
[2022-11-19 06:55:05,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-11-19 06:55:05,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-19 06:55:05,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3
[2022-11-19 06:55:05,119 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-19 06:55:05,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2022-11-19 06:55:05,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s)
[2022-11-19 06:55:05,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-11-19 06:55:05,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 24 conjunts are in the unsatisfiable core
[2022-11-19 06:55:05,224 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-11-19 06:55:05,510 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked.
[2022-11-19 06:55:05,511 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-11-19 06:55:05,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33
[2022-11-19 06:55:06,029 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked.
[2022-11-19 06:55:06,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292611544] provided 0 perfect and 2 imperfect interpolant sequences
[2022-11-19 06:55:06,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1635363087]
[2022-11-19 06:55:06,034 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest
[2022-11-19 06:55:06,034 INFO L166 IcfgInterpreter]: Building call graph
[2022-11-19 06:55:06,034 FATAL L? ?]: Ignoring exception!
java.lang.IllegalArgumentException: Recursive programs are not supported.
at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132)
at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.<init>(CallGraph.java:97)
at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.<init>(IcfgInterpreter.java:92)
at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.<init>(SifaRunner.java:98)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77)
at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266)
at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147)
at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137)
at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.<init>(AutomatonFreeRefinementEngine.java:85)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.<init>(TraceAbstractionRefinementEngine.java:82)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.<init>(TraceAbstractionStarter.java:154)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
[2022-11-19 06:55:06,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-11-19 06:55:06,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 23
[2022-11-19 06:55:06,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28418532]
[2022-11-19 06:55:06,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-11-19 06:55:06,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states
[2022-11-19 06:55:06,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-19 06:55:06,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants.
[2022-11-19 06:55:06,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552
[2022-11-19 06:55:06,043 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand has 24 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 17 states have internal predecessors, (51), 11 states have call successors, (23), 8 states have call predecessors, (23), 3 states have return successors, (18), 11 states have call predecessors, (18), 10 states have call successors, (18)
[2022-11-19 06:55:06,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-19 06:55:06,938 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions.
[2022-11-19 06:55:06,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states.
[2022-11-19 06:55:06,939 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 17 states have internal predecessors, (51), 11 states have call successors, (23), 8 states have call predecessors, (23), 3 states have return successors, (18), 11 states have call predecessors, (18), 10 states have call successors, (18) Word has length 44
[2022-11-19 06:55:06,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-19 06:55:06,940 INFO L225 Difference]: With dead ends: 84
[2022-11-19 06:55:06,940 INFO L226 Difference]: Without dead ends: 84
[2022-11-19 06:55:06,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260
[2022-11-19 06:55:06,941 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 86 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-11-19 06:55:06,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 297 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 490 Invalid, 0 Unknown, 34 Unchecked, 0.4s Time]
[2022-11-19 06:55:06,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states.
[2022-11-19 06:55:06,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74.
[2022-11-19 06:55:06,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.06) internal successors, (53), 49 states have internal predecessors, (53), 14 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15)
[2022-11-19 06:55:06,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions.
[2022-11-19 06:55:06,946 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 44
[2022-11-19 06:55:06,946 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-11-19 06:55:06,946 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions.
[2022-11-19 06:55:06,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 17 states have internal predecessors, (51), 11 states have call successors, (23), 8 states have call predecessors, (23), 3 states have return successors, (18), 11 states have call predecessors, (18), 10 states have call successors, (18)
[2022-11-19 06:55:06,947 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions.
[2022-11-19 06:55:06,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57
[2022-11-19 06:55:06,948 INFO L187 NwaCegarLoop]: Found error trace
[2022-11-19 06:55:06,948 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-19 06:55:06,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0
[2022-11-19 06:55:07,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15
[2022-11-19 06:55:07,154 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting checkErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] ===
[2022-11-19 06:55:07,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-19 06:55:07,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1892399234, now seen corresponding path program 1 times
[2022-11-19 06:55:07,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-19 06:55:07,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256485544]
[2022-11-19 06:55:07,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:55:07,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-19 06:55:07,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:55:08,127 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked.
[2022-11-19 06:55:08,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-19 06:55:08,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256485544]
[2022-11-19 06:55:08,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256485544] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-19 06:55:08,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110683124]
[2022-11-19 06:55:08,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:55:08,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-19 06:55:08,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3
[2022-11-19 06:55:08,131 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-19 06:55:08,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2022-11-19 06:55:08,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:55:08,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 24 conjunts are in the unsatisfiable core
[2022-11-19 06:55:08,232 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-11-19 06:55:08,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5
[2022-11-19 06:55:08,531 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked.
[2022-11-19 06:55:08,531 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-11-19 06:55:08,883 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked.
[2022-11-19 06:55:08,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110683124] provided 0 perfect and 2 imperfect interpolant sequences
[2022-11-19 06:55:08,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1053910964]
[2022-11-19 06:55:08,885 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest
[2022-11-19 06:55:08,886 INFO L166 IcfgInterpreter]: Building call graph
[2022-11-19 06:55:08,886 FATAL L? ?]: Ignoring exception!
java.lang.IllegalArgumentException: Recursive programs are not supported.
at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132)
at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.<init>(CallGraph.java:97)
at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.<init>(IcfgInterpreter.java:92)
at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.<init>(SifaRunner.java:98)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77)
at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266)
at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147)
at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137)
at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.<init>(AutomatonFreeRefinementEngine.java:85)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.<init>(TraceAbstractionRefinementEngine.java:82)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.<init>(TraceAbstractionStarter.java:154)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
[2022-11-19 06:55:08,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-11-19 06:55:08,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 7, 6] total 25
[2022-11-19 06:55:08,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918293217]
[2022-11-19 06:55:08,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-11-19 06:55:08,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states
[2022-11-19 06:55:08,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-19 06:55:08,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants.
[2022-11-19 06:55:08,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650
[2022-11-19 06:55:08,889 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand has 26 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 10 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (20), 10 states have call predecessors, (20), 9 states have call successors, (20)
[2022-11-19 06:55:10,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-19 06:55:10,256 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions.
[2022-11-19 06:55:10,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states.
[2022-11-19 06:55:10,257 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 10 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (20), 10 states have call predecessors, (20), 9 states have call successors, (20) Word has length 56
[2022-11-19 06:55:10,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-19 06:55:10,257 INFO L225 Difference]: With dead ends: 84
[2022-11-19 06:55:10,257 INFO L226 Difference]: Without dead ends: 0
[2022-11-19 06:55:10,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=284, Invalid=1878, Unknown=0, NotChecked=0, Total=2162
[2022-11-19 06:55:10,259 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 70 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-11-19 06:55:10,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 266 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 389 Invalid, 0 Unknown, 23 Unchecked, 0.3s Time]
[2022-11-19 06:55:10,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2022-11-19 06:55:10,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2022-11-19 06:55:10,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-19 06:55:10,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2022-11-19 06:55:10,260 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 56
[2022-11-19 06:55:10,260 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-11-19 06:55:10,260 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2022-11-19 06:55:10,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 10 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (20), 10 states have call predecessors, (20), 9 states have call successors, (20)
[2022-11-19 06:55:10,261 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2022-11-19 06:55:10,261 INFO L282 IsEmpty]: Finished isEmpty. No accepting run.
[2022-11-19 06:55:10,263 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 17 remaining)
[2022-11-19 06:55:10,264 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 17 remaining)
[2022-11-19 06:55:10,264 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 17 remaining)
[2022-11-19 06:55:10,264 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 17 remaining)
[2022-11-19 06:55:10,265 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE (12 of 17 remaining)
[2022-11-19 06:55:10,265 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE (11 of 17 remaining)
[2022-11-19 06:55:10,265 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE (10 of 17 remaining)
[2022-11-19 06:55:10,265 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (9 of 17 remaining)
[2022-11-19 06:55:10,265 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 17 remaining)
[2022-11-19 06:55:10,266 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 17 remaining)
[2022-11-19 06:55:10,266 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 17 remaining)
[2022-11-19 06:55:10,266 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 17 remaining)
[2022-11-19 06:55:10,266 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 17 remaining)
[2022-11-19 06:55:10,266 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 17 remaining)
[2022-11-19 06:55:10,267 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 17 remaining)
[2022-11-19 06:55:10,267 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 17 remaining)
[2022-11-19 06:55:10,267 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 17 remaining)
[2022-11-19 06:55:10,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0
[2022-11-19 06:55:10,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16
[2022-11-19 06:55:10,475 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-19 06:55:10,477 INFO L178 ceAbstractionStarter]: Computing trace abstraction results
[2022-11-19 06:55:10,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 06:55:10 BoogieIcfgContainer
[2022-11-19 06:55:10,479 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2022-11-19 06:55:10,480 INFO L113 PluginConnector]: ------------------------Witness Printer----------------------------
[2022-11-19 06:55:10,480 INFO L271 PluginConnector]: Initializing Witness Printer...
[2022-11-19 06:55:10,481 INFO L275 PluginConnector]: Witness Printer initialized
[2022-11-19 06:55:10,481 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:54:39" (3/4) ...
[2022-11-19 06:55:10,484 INFO L137 WitnessPrinter]: Generating witness for correct program
[2022-11-19 06:55:10,490 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not
[2022-11-19 06:55:10,490 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure check
[2022-11-19 06:55:10,490 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert
[2022-11-19 06:55:10,498 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 31 nodes and edges
[2022-11-19 06:55:10,498 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges
[2022-11-19 06:55:10,498 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges
[2022-11-19 06:55:10,499 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges
[2022-11-19 06:55:10,539 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/witness.graphml
[2022-11-19 06:55:10,539 INFO L132 PluginConnector]: ------------------------ END Witness Printer----------------------------
[2022-11-19 06:55:10,540 INFO L158 Benchmark]: Toolchain (without parser) took 32127.28ms. Allocated memory was 94.4MB in the beginning and 232.8MB in the end (delta: 138.4MB). Free memory was 50.6MB in the beginning and 154.7MB in the end (delta: -104.1MB). Peak memory consumption was 35.2MB. Max. memory is 16.1GB.
[2022-11-19 06:55:10,540 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 94.4MB. Free memory is still 67.5MB. There was no memory consumed. Max. memory is 16.1GB.
[2022-11-19 06:55:10,541 INFO L158 Benchmark]: CACSL2BoogieTranslator took 271.45ms. Allocated memory is still 94.4MB. Free memory was 50.4MB in the beginning and 68.8MB in the end (delta: -18.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB.
[2022-11-19 06:55:10,541 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.41ms. Allocated memory is still 94.4MB. Free memory was 68.8MB in the beginning and 67.3MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB.
[2022-11-19 06:55:10,541 INFO L158 Benchmark]: Boogie Preprocessor took 45.24ms. Allocated memory is still 94.4MB. Free memory was 67.3MB in the beginning and 66.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB.
[2022-11-19 06:55:10,541 INFO L158 Benchmark]: RCFGBuilder took 526.47ms. Allocated memory is still 94.4MB. Free memory was 66.0MB in the beginning and 48.1MB in the end (delta: 17.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB.
[2022-11-19 06:55:10,542 INFO L158 Benchmark]: TraceAbstraction took 31173.17ms. Allocated memory was 94.4MB in the beginning and 232.8MB in the end (delta: 138.4MB). Free memory was 47.3MB in the beginning and 158.4MB in the end (delta: -111.1MB). Peak memory consumption was 28.6MB. Max. memory is 16.1GB.
[2022-11-19 06:55:10,542 INFO L158 Benchmark]: Witness Printer took 59.22ms. Allocated memory is still 232.8MB. Free memory was 158.4MB in the beginning and 154.7MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB.
[2022-11-19 06:55:10,544 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.22ms. Allocated memory is still 94.4MB. Free memory is still 67.5MB. There was no memory consumed. Max. memory is 16.1GB.
* CACSL2BoogieTranslator took 271.45ms. Allocated memory is still 94.4MB. Free memory was 50.4MB in the beginning and 68.8MB in the end (delta: -18.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB.
* Boogie Procedure Inliner took 38.41ms. Allocated memory is still 94.4MB. Free memory was 68.8MB in the beginning and 67.3MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB.
* Boogie Preprocessor took 45.24ms. Allocated memory is still 94.4MB. Free memory was 67.3MB in the beginning and 66.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB.
* RCFGBuilder took 526.47ms. Allocated memory is still 94.4MB. Free memory was 66.0MB in the beginning and 48.1MB in the end (delta: 17.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB.
* TraceAbstraction took 31173.17ms. Allocated memory was 94.4MB in the beginning and 232.8MB in the end (delta: 138.4MB). Free memory was 47.3MB in the beginning and 158.4MB in the end (delta: -111.1MB). Peak memory consumption was 28.6MB. Max. memory is 16.1GB.
* Witness Printer took 59.22ms. Allocated memory is still 232.8MB. Free memory was 158.4MB in the beginning and 154.7MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- StatisticsResult: ErrorAutomatonStatistics
NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0
- PositiveResult [Line: -1]: pointer dereference always succeeds
For all program executions holds that pointer dereference always succeeds at this location
- PositiveResult [Line: -1]: pointer dereference always succeeds
For all program executions holds that pointer dereference always succeeds at this location
- PositiveResult [Line: -1]: pointer dereference always succeeds
For all program executions holds that pointer dereference always succeeds at this location
- PositiveResult [Line: -1]: pointer dereference always succeeds
For all program executions holds that pointer dereference always succeeds at this location
- PositiveResult [Line: 52]: free always succeeds
For all program executions holds that free always succeeds at this location
- PositiveResult [Line: 52]: free always succeeds
For all program executions holds that free always succeeds at this location
- PositiveResult [Line: 52]: free always succeeds
For all program executions holds that free always succeeds at this location
- PositiveResult [Line: 40]: all allocated memory was freed
For all program executions holds that all allocated memory was freed at this location
- PositiveResult [Line: -1]: pointer dereference always succeeds
For all program executions holds that pointer dereference always succeeds at this location
- PositiveResult [Line: -1]: pointer dereference always succeeds
For all program executions holds that pointer dereference always succeeds at this location
- PositiveResult [Line: -1]: pointer dereference always succeeds
For all program executions holds that pointer dereference always succeeds at this location
- PositiveResult [Line: -1]: pointer dereference always succeeds
For all program executions holds that pointer dereference always succeeds at this location
- PositiveResult [Line: -1]: pointer dereference always succeeds
For all program executions holds that pointer dereference always succeeds at this location
- PositiveResult [Line: -1]: pointer dereference always succeeds
For all program executions holds that pointer dereference always succeeds at this location
- PositiveResult [Line: -1]: pointer dereference always succeeds
For all program executions holds that pointer dereference always succeeds at this location
- PositiveResult [Line: -1]: pointer dereference always succeeds
For all program executions holds that pointer dereference always succeeds at this location
- PositiveResult [Line: 11]: all allocated memory was freed
For all program executions holds that all allocated memory was freed at this location
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 4 procedures, 54 locations, 17 error locations. Started 1 CEGAR loops. OverallTime: 31.1s, OverallIterations: 17, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 8.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1089 SdHoareTripleChecker+Valid, 3.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1054 mSDsluCounter, 3092 SdHoareTripleChecker+Invalid, 3.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 411 IncrementalHoareTripleChecker+Unchecked, 2570 mSDsCounter, 345 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4053 IncrementalHoareTripleChecker+Invalid, 4809 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 345 mSolverCounterUnsat, 522 mSDtfsCounter, 4053 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 970 GetRequests, 587 SyntacticMatches, 28 SemanticMatches, 355 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1941 ImplicationChecksByTransitivity, 13.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=88occurred in iteration=14, InterpolantAutomatonStates: 212, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 63 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 15.4s InterpolantComputationTime, 878 NumberOfCodeBlocks, 878 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 1170 ConstructedInterpolants, 47 QuantifiedInterpolants, 9175 SizeOfPredicates, 127 NumberOfNonLiveVariables, 1918 ConjunctsInSsa, 243 ConjunctsInUnsatCore, 36 InterpolantComputations, 8 PerfectInterpolantSequences, 412/543 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.9s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 4, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 20, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 15, TOOLS_POST_TIME: 0.2s, TOOLS_POST_CALL_APPLICATIONS: 13, TOOLS_POST_CALL_TIME: 0.4s, TOOLS_POST_RETURN_APPLICATIONS: 8, TOOLS_POST_RETURN_TIME: 0.1s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 36, TOOLS_QUANTIFIERELIM_TIME: 0.6s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 55, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 12, DOMAIN_JOIN_TIME: 0.2s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 20, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 8, CALL_SUMMARIZER_CACHE_MISSES: 2, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 137, DAG_COMPRESSION_RETAINED_NODES: 61, ReuseStatistics: No data available
- AllSpecificationsHoldResult: All specifications hold
17 specifications checked. All of them hold
RESULT: Ultimate proved your program to be correct!
[2022-11-19 06:55:10,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0
Received shutdown request...
--- End real Ultimate output ---
Execution finished normally
Writing output log to file Ultimate.log
Result:
TRUE