/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr.5_overflow.ufo.UNBOUNDED.pals.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-04-01 06:18:54,092 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-04-01 06:18:54,093 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2023-04-01 06:18:54,123 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2023-04-01 06:18:54,123 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2023-04-01 06:18:54,124 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2023-04-01 06:18:54,129 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2023-04-01 06:18:54,134 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2023-04-01 06:18:54,136 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2023-04-01 06:18:54,140 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2023-04-01 06:18:54,142 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2023-04-01 06:18:54,143 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2023-04-01 06:18:54,143 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2023-04-01 06:18:54,144 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2023-04-01 06:18:54,145 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2023-04-01 06:18:54,145 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2023-04-01 06:18:54,146 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2023-04-01 06:18:54,146 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2023-04-01 06:18:54,147 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2023-04-01 06:18:54,148 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2023-04-01 06:18:54,149 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2023-04-01 06:18:54,153 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2023-04-01 06:18:54,154 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2023-04-01 06:18:54,155 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2023-04-01 06:18:54,161 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2023-04-01 06:18:54,162 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2023-04-01 06:18:54,162 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2023-04-01 06:18:54,163 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2023-04-01 06:18:54,163 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2023-04-01 06:18:54,164 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2023-04-01 06:18:54,164 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2023-04-01 06:18:54,165 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2023-04-01 06:18:54,166 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2023-04-01 06:18:54,166 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2023-04-01 06:18:54,167 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2023-04-01 06:18:54,167 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2023-04-01 06:18:54,167 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2023-04-01 06:18:54,167 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2023-04-01 06:18:54,168 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2023-04-01 06:18:54,168 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2023-04-01 06:18:54,168 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-04-01 06:18:54,169 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf
[2023-04-01 06:18:54,211 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-04-01 06:18:54,211 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-04-01 06:18:54,212 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-04-01 06:18:54,212 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-04-01 06:18:54,212 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-04-01 06:18:54,212 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-04-01 06:18:54,212 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-04-01 06:18:54,212 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-04-01 06:18:54,213 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-04-01 06:18:54,213 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-04-01 06:18:54,213 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-04-01 06:18:54,213 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-04-01 06:18:54,213 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-04-01 06:18:54,213 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-04-01 06:18:54,213 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-04-01 06:18:54,213 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-04-01 06:18:54,213 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-04-01 06:18:54,213 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-04-01 06:18:54,214 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-04-01 06:18:54,214 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-04-01 06:18:54,214 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-04-01 06:18:54,214 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-04-01 06:18:54,214 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-04-01 06:18:54,214 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-04-01 06:18:54,214 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-04-01 06:18:54,214 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-04-01 06:18:54,214 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-04-01 06:18:54,214 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-04-01 06:18:54,214 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-04-01 06:18:54,215 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-04-01 06:18:54,215 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-04-01 06:18:54,215 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-04-01 06:18:54,215 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 06:18:54,215 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-04-01 06:18:54,215 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-04-01 06:18:54,215 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-04-01 06:18:54,215 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-04-01 06:18:54,215 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-04-01 06:18:54,215 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-04-01 06:18:54,215 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-04-01 06:18:54,216 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-04-01 06:18:54,216 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain
[2023-04-01 06:18:54,394 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-04-01 06:18:54,411 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-04-01 06:18:54,412 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-04-01 06:18:54,413 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-04-01 06:18:54,414 INFO  L275        PluginConnector]: CDTParser initialized
[2023-04-01 06:18:54,416 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.5_overflow.ufo.UNBOUNDED.pals.c
[2023-04-01 06:18:55,434 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-04-01 06:18:55,595 INFO  L351              CDTParser]: Found 1 translation units.
[2023-04-01 06:18:55,595 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.5_overflow.ufo.UNBOUNDED.pals.c
[2023-04-01 06:18:55,605 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e4abc47a/34e389c65d8a4a0686fc0981d9a894db/FLAG4ee54fd75
[2023-04-01 06:18:56,009 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e4abc47a/34e389c65d8a4a0686fc0981d9a894db
[2023-04-01 06:18:56,011 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-04-01 06:18:56,012 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-04-01 06:18:56,013 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-04-01 06:18:56,013 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-04-01 06:18:56,016 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-04-01 06:18:56,016 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:18:56" (1/1) ...
[2023-04-01 06:18:56,017 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11396da9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:18:56, skipping insertion in model container
[2023-04-01 06:18:56,018 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:18:56" (1/1) ...
[2023-04-01 06:18:56,023 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-04-01 06:18:56,070 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-04-01 06:18:56,207 WARN  L247   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.5_overflow.ufo.UNBOUNDED.pals.c[11335,11348]
[2023-04-01 06:18:56,211 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 06:18:56,219 INFO  L203         MainTranslator]: Completed pre-run
[2023-04-01 06:18:56,250 WARN  L247   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.5_overflow.ufo.UNBOUNDED.pals.c[11335,11348]
[2023-04-01 06:18:56,250 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 06:18:56,264 INFO  L208         MainTranslator]: Completed translation
[2023-04-01 06:18:56,264 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:18:56 WrapperNode
[2023-04-01 06:18:56,264 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-04-01 06:18:56,265 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-04-01 06:18:56,265 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-04-01 06:18:56,265 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-04-01 06:18:56,273 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:18:56" (1/1) ...
[2023-04-01 06:18:56,274 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:18:56" (1/1) ...
[2023-04-01 06:18:56,279 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:18:56" (1/1) ...
[2023-04-01 06:18:56,279 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:18:56" (1/1) ...
[2023-04-01 06:18:56,287 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:18:56" (1/1) ...
[2023-04-01 06:18:56,292 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:18:56" (1/1) ...
[2023-04-01 06:18:56,294 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:18:56" (1/1) ...
[2023-04-01 06:18:56,295 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:18:56" (1/1) ...
[2023-04-01 06:18:56,297 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-04-01 06:18:56,298 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-04-01 06:18:56,298 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-04-01 06:18:56,298 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-04-01 06:18:56,299 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:18:56" (1/1) ...
[2023-04-01 06:18:56,303 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 06:18:56,313 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 06:18:56,323 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-04-01 06:18:56,325 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-04-01 06:18:56,349 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-04-01 06:18:56,349 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-04-01 06:18:56,350 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-04-01 06:18:56,350 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2023-04-01 06:18:56,350 INFO  L138     BoogieDeclarations]: Found implementation of procedure node1
[2023-04-01 06:18:56,350 INFO  L138     BoogieDeclarations]: Found implementation of procedure node2
[2023-04-01 06:18:56,350 INFO  L138     BoogieDeclarations]: Found implementation of procedure node3
[2023-04-01 06:18:56,350 INFO  L138     BoogieDeclarations]: Found implementation of procedure node4
[2023-04-01 06:18:56,350 INFO  L138     BoogieDeclarations]: Found implementation of procedure node5
[2023-04-01 06:18:56,350 INFO  L138     BoogieDeclarations]: Found implementation of procedure init
[2023-04-01 06:18:56,350 INFO  L138     BoogieDeclarations]: Found implementation of procedure check
[2023-04-01 06:18:56,350 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-04-01 06:18:56,350 INFO  L138     BoogieDeclarations]: Found implementation of procedure assert
[2023-04-01 06:18:56,351 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-04-01 06:18:56,351 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-04-01 06:18:56,351 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-04-01 06:18:56,351 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-04-01 06:18:56,351 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2023-04-01 06:18:56,351 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2023-04-01 06:18:56,351 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar
[2023-04-01 06:18:56,351 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2023-04-01 06:18:56,351 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2023-04-01 06:18:56,351 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2023-04-01 06:18:56,351 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2023-04-01 06:18:56,351 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2023-04-01 06:18:56,352 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2023-04-01 06:18:56,352 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2023-04-01 06:18:56,352 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2023-04-01 06:18:56,352 INFO  L130     BoogieDeclarations]: Found specification of procedure node5
[2023-04-01 06:18:56,352 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2023-04-01 06:18:56,352 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2023-04-01 06:18:56,352 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-04-01 06:18:56,352 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-04-01 06:18:56,352 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-04-01 06:18:56,352 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-04-01 06:18:56,352 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-04-01 06:18:56,352 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-04-01 06:18:56,353 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-04-01 06:18:56,466 INFO  L236             CfgBuilder]: Building ICFG
[2023-04-01 06:18:56,468 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-04-01 06:18:56,778 INFO  L277             CfgBuilder]: Performing block encoding
[2023-04-01 06:18:57,072 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-04-01 06:18:57,072 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-04-01 06:18:57,074 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:18:57 BoogieIcfgContainer
[2023-04-01 06:18:57,074 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-04-01 06:18:57,076 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-04-01 06:18:57,076 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-04-01 06:18:57,078 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-04-01 06:18:57,078 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:18:56" (1/3) ...
[2023-04-01 06:18:57,079 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aa41afc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:18:57, skipping insertion in model container
[2023-04-01 06:18:57,079 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:18:56" (2/3) ...
[2023-04-01 06:18:57,079 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aa41afc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:18:57, skipping insertion in model container
[2023-04-01 06:18:57,079 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:18:57" (3/3) ...
[2023-04-01 06:18:57,083 INFO  L112   eAbstractionObserver]: Analyzing ICFG pals_lcr.5_overflow.ufo.UNBOUNDED.pals.c
[2023-04-01 06:18:57,095 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-04-01 06:18:57,096 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-04-01 06:18:57,134 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-04-01 06:18:57,139 INFO  L357      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@5851e9a1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-04-01 06:18:57,139 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-04-01 06:18:57,142 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 49 states, 25 states have (on average 1.24) internal successors, (31), 27 states have internal predecessors, (31), 11 states have call successors, (11), 11 states have call predecessors, (11), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11)
[2023-04-01 06:18:57,148 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 41
[2023-04-01 06:18:57,148 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 06:18:57,148 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 06:18:57,149 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 06:18:57,153 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 06:18:57,153 INFO  L85        PathProgramCache]: Analyzing trace with hash -2009511639, now seen corresponding path program 1 times
[2023-04-01 06:18:57,159 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 06:18:57,159 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976654424]
[2023-04-01 06:18:57,159 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 06:18:57,160 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 06:18:57,323 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 06:19:00,059 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 06:19:00,059 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 06:19:00,059 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976654424]
[2023-04-01 06:19:00,060 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976654424] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 06:19:00,060 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 06:19:00,060 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25
[2023-04-01 06:19:00,061 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467559830]
[2023-04-01 06:19:00,062 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 06:19:00,065 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 25 states
[2023-04-01 06:19:00,065 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 06:19:00,108 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants.
[2023-04-01 06:19:00,110 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600
[2023-04-01 06:19:00,112 INFO  L87              Difference]: Start difference. First operand  has 49 states, 25 states have (on average 1.24) internal successors, (31), 27 states have internal predecessors, (31), 11 states have call successors, (11), 11 states have call predecessors, (11), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand  has 25 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 10 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9)
[2023-04-01 06:19:01,268 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 06:19:01,268 INFO  L93              Difference]: Finished difference Result 115 states and 133 transitions.
[2023-04-01 06:19:01,270 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. 
[2023-04-01 06:19:01,271 INFO  L78                 Accepts]: Start accepts. Automaton has  has 25 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 10 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 40
[2023-04-01 06:19:01,271 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 06:19:01,276 INFO  L225             Difference]: With dead ends: 115
[2023-04-01 06:19:01,276 INFO  L226             Difference]: Without dead ends: 79
[2023-04-01 06:19:01,281 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=444, Invalid=1908, Unknown=0, NotChecked=0, Total=2352
[2023-04-01 06:19:01,285 INFO  L413           NwaCegarLoop]: 21 mSDtfsCounter, 303 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2023-04-01 06:19:01,285 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 110 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2023-04-01 06:19:01,297 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 79 states.
[2023-04-01 06:19:01,327 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68.
[2023-04-01 06:19:01,328 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 68 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17)
[2023-04-01 06:19:01,331 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions.
[2023-04-01 06:19:01,332 INFO  L78                 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 40
[2023-04-01 06:19:01,332 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 06:19:01,333 INFO  L495      AbstractCegarLoop]: Abstraction has 68 states and 72 transitions.
[2023-04-01 06:19:01,334 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 25 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 10 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9)
[2023-04-01 06:19:01,334 INFO  L276                IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions.
[2023-04-01 06:19:01,335 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 43
[2023-04-01 06:19:01,336 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 06:19:01,336 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 06:19:01,336 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-04-01 06:19:01,336 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 06:19:01,337 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 06:19:01,337 INFO  L85        PathProgramCache]: Analyzing trace with hash -1296137121, now seen corresponding path program 1 times
[2023-04-01 06:19:01,337 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 06:19:01,337 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863006715]
[2023-04-01 06:19:01,337 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 06:19:01,337 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 06:19:01,466 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 06:19:01,786 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 06:19:01,786 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 06:19:01,787 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863006715]
[2023-04-01 06:19:01,787 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863006715] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 06:19:01,787 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 06:19:01,787 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11
[2023-04-01 06:19:01,788 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502432029]
[2023-04-01 06:19:01,790 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 06:19:01,791 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2023-04-01 06:19:01,794 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 06:19:01,796 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2023-04-01 06:19:01,796 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110
[2023-04-01 06:19:01,797 INFO  L87              Difference]: Start difference. First operand 68 states and 72 transitions. Second operand  has 11 states, 7 states have (on average 3.142857142857143) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9)
[2023-04-01 06:19:02,158 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 06:19:02,158 INFO  L93              Difference]: Finished difference Result 133 states and 144 transitions.
[2023-04-01 06:19:02,159 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. 
[2023-04-01 06:19:02,159 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 7 states have (on average 3.142857142857143) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 42
[2023-04-01 06:19:02,159 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 06:19:02,162 INFO  L225             Difference]: With dead ends: 133
[2023-04-01 06:19:02,162 INFO  L226             Difference]: Without dead ends: 98
[2023-04-01 06:19:02,166 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272
[2023-04-01 06:19:02,168 INFO  L413           NwaCegarLoop]: 23 mSDtfsCounter, 74 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-04-01 06:19:02,168 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 96 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-04-01 06:19:02,171 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 98 states.
[2023-04-01 06:19:02,196 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 71.
[2023-04-01 06:19:02,197 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 71 states, 37 states have (on average 1.135135135135135) internal successors, (42), 38 states have internal predecessors, (42), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16)
[2023-04-01 06:19:02,199 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions.
[2023-04-01 06:19:02,199 INFO  L78                 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 42
[2023-04-01 06:19:02,199 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 06:19:02,200 INFO  L495      AbstractCegarLoop]: Abstraction has 71 states and 75 transitions.
[2023-04-01 06:19:02,200 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 7 states have (on average 3.142857142857143) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9)
[2023-04-01 06:19:02,200 INFO  L276                IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions.
[2023-04-01 06:19:02,202 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 43
[2023-04-01 06:19:02,202 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 06:19:02,202 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 06:19:02,203 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-04-01 06:19:02,203 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 06:19:02,203 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 06:19:02,203 INFO  L85        PathProgramCache]: Analyzing trace with hash 1951591729, now seen corresponding path program 1 times
[2023-04-01 06:19:02,203 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 06:19:02,203 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232227696]
[2023-04-01 06:19:02,204 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 06:19:02,204 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 06:19:02,245 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 06:19:03,808 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 06:19:03,808 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 06:19:03,808 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232227696]
[2023-04-01 06:19:03,809 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232227696] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 06:19:03,809 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 06:19:03,809 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25
[2023-04-01 06:19:03,809 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883888518]
[2023-04-01 06:19:03,809 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 06:19:03,809 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 25 states
[2023-04-01 06:19:03,809 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 06:19:03,810 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants.
[2023-04-01 06:19:03,810 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600
[2023-04-01 06:19:03,811 INFO  L87              Difference]: Start difference. First operand 71 states and 75 transitions. Second operand  has 25 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 10 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9)
[2023-04-01 06:19:04,727 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 06:19:04,728 INFO  L93              Difference]: Finished difference Result 144 states and 154 transitions.
[2023-04-01 06:19:04,728 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. 
[2023-04-01 06:19:04,728 INFO  L78                 Accepts]: Start accepts. Automaton has  has 25 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 10 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 42
[2023-04-01 06:19:04,729 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 06:19:04,731 INFO  L225             Difference]: With dead ends: 144
[2023-04-01 06:19:04,731 INFO  L226             Difference]: Without dead ends: 109
[2023-04-01 06:19:04,734 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=394, Invalid=1676, Unknown=0, NotChecked=0, Total=2070
[2023-04-01 06:19:04,752 INFO  L413           NwaCegarLoop]: 21 mSDtfsCounter, 422 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2023-04-01 06:19:04,753 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 105 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2023-04-01 06:19:04,754 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 109 states.
[2023-04-01 06:19:04,800 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71.
[2023-04-01 06:19:04,800 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 71 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 38 states have internal predecessors, (41), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16)
[2023-04-01 06:19:04,801 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions.
[2023-04-01 06:19:04,801 INFO  L78                 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 42
[2023-04-01 06:19:04,802 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 06:19:04,803 INFO  L495      AbstractCegarLoop]: Abstraction has 71 states and 74 transitions.
[2023-04-01 06:19:04,804 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 25 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 10 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9)
[2023-04-01 06:19:04,804 INFO  L276                IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions.
[2023-04-01 06:19:04,805 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 44
[2023-04-01 06:19:04,805 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 06:19:04,806 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 06:19:04,806 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-04-01 06:19:04,806 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 06:19:04,807 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 06:19:04,807 INFO  L85        PathProgramCache]: Analyzing trace with hash -678882884, now seen corresponding path program 1 times
[2023-04-01 06:19:04,807 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 06:19:04,807 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462140187]
[2023-04-01 06:19:04,807 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 06:19:04,808 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 06:19:04,856 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 06:19:05,857 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 06:19:05,857 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 06:19:05,857 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462140187]
[2023-04-01 06:19:05,857 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462140187] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 06:19:05,857 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 06:19:05,857 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13
[2023-04-01 06:19:05,858 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040001996]
[2023-04-01 06:19:05,858 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 06:19:05,858 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 13 states
[2023-04-01 06:19:05,858 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 06:19:05,859 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2023-04-01 06:19:05,859 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156
[2023-04-01 06:19:05,859 INFO  L87              Difference]: Start difference. First operand 71 states and 74 transitions. Second operand  has 13 states, 8 states have (on average 2.875) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9)
[2023-04-01 06:19:06,110 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 06:19:06,111 INFO  L93              Difference]: Finished difference Result 106 states and 118 transitions.
[2023-04-01 06:19:06,111 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2023-04-01 06:19:06,111 INFO  L78                 Accepts]: Start accepts. Automaton has  has 13 states, 8 states have (on average 2.875) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 43
[2023-04-01 06:19:06,113 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 06:19:06,115 INFO  L225             Difference]: With dead ends: 106
[2023-04-01 06:19:06,115 INFO  L226             Difference]: Without dead ends: 104
[2023-04-01 06:19:06,115 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462
[2023-04-01 06:19:06,118 INFO  L413           NwaCegarLoop]: 53 mSDtfsCounter, 35 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-04-01 06:19:06,118 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 562 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-04-01 06:19:06,119 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 104 states.
[2023-04-01 06:19:06,149 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 80.
[2023-04-01 06:19:06,149 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 80 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 45 states have internal predecessors, (47), 18 states have call successors, (18), 18 states have call predecessors, (18), 18 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18)
[2023-04-01 06:19:06,150 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions.
[2023-04-01 06:19:06,150 INFO  L78                 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 43
[2023-04-01 06:19:06,151 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 06:19:06,151 INFO  L495      AbstractCegarLoop]: Abstraction has 80 states and 83 transitions.
[2023-04-01 06:19:06,151 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 13 states, 8 states have (on average 2.875) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9)
[2023-04-01 06:19:06,151 INFO  L276                IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions.
[2023-04-01 06:19:06,155 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 72
[2023-04-01 06:19:06,155 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 06:19:06,155 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 06:19:06,155 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-04-01 06:19:06,155 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 06:19:06,156 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 06:19:06,156 INFO  L85        PathProgramCache]: Analyzing trace with hash -1850913756, now seen corresponding path program 1 times
[2023-04-01 06:19:06,156 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 06:19:06,156 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711256786]
[2023-04-01 06:19:06,156 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 06:19:06,156 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 06:19:06,304 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 06:19:12,896 INFO  L134       CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2023-04-01 06:19:12,909 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 06:19:12,912 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711256786]
[2023-04-01 06:19:12,912 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711256786] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-01 06:19:12,914 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002078463]
[2023-04-01 06:19:12,914 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 06:19:12,914 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 06:19:12,915 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 06:19:12,917 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-04-01 06:19:12,918 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-04-01 06:19:13,154 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 06:19:13,196 INFO  L262         TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 187 conjunts are in the unsatisfiable core
[2023-04-01 06:19:13,207 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-01 06:19:44,314 INFO  L134       CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 06:19:44,314 INFO  L327         TraceCheckSpWp]: Computing backward predicates...