/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.4.ufo.UNBOUNDED.pals.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-04-03 01:51:31,083 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-04-03 01:51:31,084 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2023-04-03 01:51:31,115 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2023-04-03 01:51:31,115 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2023-04-03 01:51:31,117 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2023-04-03 01:51:31,119 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2023-04-03 01:51:31,121 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2023-04-03 01:51:31,122 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2023-04-03 01:51:31,125 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2023-04-03 01:51:31,127 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2023-04-03 01:51:31,128 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2023-04-03 01:51:31,128 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2023-04-03 01:51:31,130 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2023-04-03 01:51:31,130 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2023-04-03 01:51:31,131 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2023-04-03 01:51:31,131 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2023-04-03 01:51:31,131 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2023-04-03 01:51:31,132 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2023-04-03 01:51:31,133 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2023-04-03 01:51:31,134 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2023-04-03 01:51:31,135 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2023-04-03 01:51:31,137 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2023-04-03 01:51:31,138 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2023-04-03 01:51:31,146 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2023-04-03 01:51:31,146 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2023-04-03 01:51:31,146 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
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[2023-04-03 01:51:31,147 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2023-04-03 01:51:31,147 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
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[2023-04-03 01:51:31,148 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2023-04-03 01:51:31,148 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2023-04-03 01:51:31,149 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
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[2023-04-03 01:51:31,150 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-04-03 01:51:31,151 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-04-03 01:51:31,152 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
[2023-04-03 01:51:31,173 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-04-03 01:51:31,173 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-04-03 01:51:31,173 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-04-03 01:51:31,173 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-04-03 01:51:31,174 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-04-03 01:51:31,174 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-04-03 01:51:31,174 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-04-03 01:51:31,174 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-04-03 01:51:31,174 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-04-03 01:51:31,174 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-04-03 01:51:31,174 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-04-03 01:51:31,174 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-04-03 01:51:31,175 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-04-03 01:51:31,175 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-04-03 01:51:31,175 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-04-03 01:51:31,175 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-04-03 01:51:31,175 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-04-03 01:51:31,175 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-04-03 01:51:31,176 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-04-03 01:51:31,176 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-04-03 01:51:31,176 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-04-03 01:51:31,176 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-04-03 01:51:31,176 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-04-03 01:51:31,176 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-04-03 01:51:31,176 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-04-03 01:51:31,176 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-04-03 01:51:31,176 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-04-03 01:51:31,177 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-04-03 01:51:31,177 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-04-03 01:51:31,177 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-04-03 01:51:31,177 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-04-03 01:51:31,177 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-04-03 01:51:31,177 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-03 01:51:31,177 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-04-03 01:51:31,177 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-04-03 01:51:31,177 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-04-03 01:51:31,177 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-04-03 01:51:31,178 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-04-03 01:51:31,178 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-04-03 01:51:31,178 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-04-03 01:51:31,178 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-04-03 01:51:31,178 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain
[2023-04-03 01:51:31,366 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-04-03 01:51:31,386 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-04-03 01:51:31,388 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-04-03 01:51:31,389 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-04-03 01:51:31,390 INFO  L275        PluginConnector]: CDTParser initialized
[2023-04-03 01:51:31,390 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.4.ufo.UNBOUNDED.pals.c
[2023-04-03 01:51:32,414 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-04-03 01:51:32,574 INFO  L351              CDTParser]: Found 1 translation units.
[2023-04-03 01:51:32,574 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.4.ufo.UNBOUNDED.pals.c
[2023-04-03 01:51:32,579 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/102eee645/d408de7f17744450bc1e4f62509a7621/FLAGa6a4b8096
[2023-04-03 01:51:32,588 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/102eee645/d408de7f17744450bc1e4f62509a7621
[2023-04-03 01:51:32,590 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-04-03 01:51:32,591 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-04-03 01:51:32,599 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-04-03 01:51:32,599 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-04-03 01:51:32,602 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-04-03 01:51:32,602 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:51:32" (1/1) ...
[2023-04-03 01:51:32,603 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@697a17cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:51:32, skipping insertion in model container
[2023-04-03 01:51:32,603 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:51:32" (1/1) ...
[2023-04-03 01:51:32,608 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-04-03 01:51:32,635 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-04-03 01:51:32,757 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.4.ufo.UNBOUNDED.pals.c[8305,8318]
[2023-04-03 01:51:32,759 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-03 01:51:32,768 INFO  L203         MainTranslator]: Completed pre-run
[2023-04-03 01:51:32,799 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.4.ufo.UNBOUNDED.pals.c[8305,8318]
[2023-04-03 01:51:32,799 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-03 01:51:32,810 INFO  L208         MainTranslator]: Completed translation
[2023-04-03 01:51:32,810 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:51:32 WrapperNode
[2023-04-03 01:51:32,810 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-04-03 01:51:32,811 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-04-03 01:51:32,811 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-04-03 01:51:32,811 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-04-03 01:51:32,819 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:51:32" (1/1) ...
[2023-04-03 01:51:32,819 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:51:32" (1/1) ...
[2023-04-03 01:51:32,824 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:51:32" (1/1) ...
[2023-04-03 01:51:32,824 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:51:32" (1/1) ...
[2023-04-03 01:51:32,831 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:51:32" (1/1) ...
[2023-04-03 01:51:32,835 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:51:32" (1/1) ...
[2023-04-03 01:51:32,837 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:51:32" (1/1) ...
[2023-04-03 01:51:32,838 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:51:32" (1/1) ...
[2023-04-03 01:51:32,846 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-04-03 01:51:32,847 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-04-03 01:51:32,852 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-04-03 01:51:32,852 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-04-03 01:51:32,853 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:51:32" (1/1) ...
[2023-04-03 01:51:32,857 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-03 01:51:32,866 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-03 01:51:32,875 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)
[2023-04-03 01:51:32,881 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
[2023-04-03 01:51:32,904 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-04-03 01:51:32,904 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-04-03 01:51:32,904 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-04-03 01:51:32,904 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2023-04-03 01:51:32,904 INFO  L138     BoogieDeclarations]: Found implementation of procedure node1
[2023-04-03 01:51:32,904 INFO  L138     BoogieDeclarations]: Found implementation of procedure node2
[2023-04-03 01:51:32,904 INFO  L138     BoogieDeclarations]: Found implementation of procedure node3
[2023-04-03 01:51:32,905 INFO  L138     BoogieDeclarations]: Found implementation of procedure node4
[2023-04-03 01:51:32,905 INFO  L138     BoogieDeclarations]: Found implementation of procedure init
[2023-04-03 01:51:32,905 INFO  L138     BoogieDeclarations]: Found implementation of procedure check
[2023-04-03 01:51:32,905 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-04-03 01:51:32,905 INFO  L138     BoogieDeclarations]: Found implementation of procedure assert
[2023-04-03 01:51:32,905 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-04-03 01:51:32,905 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-04-03 01:51:32,905 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-04-03 01:51:32,905 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-04-03 01:51:32,905 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2023-04-03 01:51:32,905 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2023-04-03 01:51:32,905 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar
[2023-04-03 01:51:32,905 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2023-04-03 01:51:32,906 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2023-04-03 01:51:32,906 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2023-04-03 01:51:32,906 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2023-04-03 01:51:32,906 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2023-04-03 01:51:32,906 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2023-04-03 01:51:32,906 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2023-04-03 01:51:32,906 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2023-04-03 01:51:32,906 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2023-04-03 01:51:32,906 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2023-04-03 01:51:32,906 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-04-03 01:51:32,906 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-04-03 01:51:32,906 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-04-03 01:51:32,906 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-04-03 01:51:32,907 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-04-03 01:51:32,907 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-04-03 01:51:32,907 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-04-03 01:51:32,986 INFO  L236             CfgBuilder]: Building ICFG
[2023-04-03 01:51:32,987 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-04-03 01:51:33,325 INFO  L277             CfgBuilder]: Performing block encoding
[2023-04-03 01:51:33,531 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-04-03 01:51:33,532 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-04-03 01:51:33,535 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:51:33 BoogieIcfgContainer
[2023-04-03 01:51:33,535 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-04-03 01:51:33,537 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-04-03 01:51:33,538 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-04-03 01:51:33,540 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-04-03 01:51:33,540 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 01:51:32" (1/3) ...
[2023-04-03 01:51:33,540 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a20146c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:51:33, skipping insertion in model container
[2023-04-03 01:51:33,541 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:51:32" (2/3) ...
[2023-04-03 01:51:33,541 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a20146c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:51:33, skipping insertion in model container
[2023-04-03 01:51:33,541 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:51:33" (3/3) ...
[2023-04-03 01:51:33,542 INFO  L112   eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.UNBOUNDED.pals.c
[2023-04-03 01:51:33,556 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-04-03 01:51:33,557 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-04-03 01:51:33,595 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-04-03 01:51:33,599 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;@6c440cef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-04-03 01:51:33,599 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-04-03 01:51:33,602 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 46 states, 24 states have (on average 1.25) internal successors, (30), 26 states have internal predecessors, (30), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2023-04-03 01:51:33,608 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 38
[2023-04-03 01:51:33,608 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-03 01:51:33,609 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]
[2023-04-03 01:51:33,609 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-03 01:51:33,614 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-03 01:51:33,614 INFO  L85        PathProgramCache]: Analyzing trace with hash -102157486, now seen corresponding path program 1 times
[2023-04-03 01:51:33,620 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-03 01:51:33,620 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500417911]
[2023-04-03 01:51:33,620 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-03 01:51:33,620 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-03 01:51:33,809 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-03 01:51:35,766 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-03 01:51:35,766 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-03 01:51:35,766 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500417911]
[2023-04-03 01:51:35,767 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500417911] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-03 01:51:35,767 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-03 01:51:35,767 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22
[2023-04-03 01:51:35,768 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943667117]
[2023-04-03 01:51:35,769 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-03 01:51:35,771 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 22 states
[2023-04-03 01:51:35,772 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-03 01:51:35,808 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2023-04-03 01:51:35,810 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462
[2023-04-03 01:51:35,811 INFO  L87              Difference]: Start difference. First operand  has 46 states, 24 states have (on average 1.25) internal successors, (30), 26 states have internal predecessors, (30), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand  has 22 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 9 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)
[2023-04-03 01:51:36,852 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-03 01:51:36,852 INFO  L93              Difference]: Finished difference Result 106 states and 124 transitions.
[2023-04-03 01:51:36,853 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. 
[2023-04-03 01:51:36,855 INFO  L78                 Accepts]: Start accepts. Automaton has  has 22 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 9 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 37
[2023-04-03 01:51:36,855 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-03 01:51:36,861 INFO  L225             Difference]: With dead ends: 106
[2023-04-03 01:51:36,862 INFO  L226             Difference]: Without dead ends: 73
[2023-04-03 01:51:36,865 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=417, Invalid=1745, Unknown=0, NotChecked=0, Total=2162
[2023-04-03 01:51:36,868 INFO  L413           NwaCegarLoop]: 20 mSDtfsCounter, 286 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2023-04-03 01:51:36,869 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 106 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2023-04-03 01:51:36,883 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 73 states.
[2023-04-03 01:51:36,907 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62.
[2023-04-03 01:51:36,909 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 62 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15)
[2023-04-03 01:51:36,910 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions.
[2023-04-03 01:51:36,911 INFO  L78                 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 37
[2023-04-03 01:51:36,911 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-03 01:51:36,911 INFO  L495      AbstractCegarLoop]: Abstraction has 62 states and 66 transitions.
[2023-04-03 01:51:36,912 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 22 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 9 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)
[2023-04-03 01:51:36,912 INFO  L276                IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions.
[2023-04-03 01:51:36,913 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 40
[2023-04-03 01:51:36,913 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-03 01:51:36,913 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]
[2023-04-03 01:51:36,914 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-04-03 01:51:36,914 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-03 01:51:36,914 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-03 01:51:36,914 INFO  L85        PathProgramCache]: Analyzing trace with hash 401119681, now seen corresponding path program 1 times
[2023-04-03 01:51:36,915 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-03 01:51:36,915 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097771243]
[2023-04-03 01:51:36,915 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-03 01:51:36,915 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-03 01:51:36,963 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-03 01:51:37,369 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-03 01:51:37,370 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-03 01:51:37,370 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097771243]
[2023-04-03 01:51:37,371 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097771243] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-03 01:51:37,371 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-03 01:51:37,371 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11
[2023-04-03 01:51:37,371 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234636840]
[2023-04-03 01:51:37,372 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-03 01:51:37,373 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2023-04-03 01:51:37,374 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-03 01:51:37,376 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2023-04-03 01:51:37,380 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-04-03 01:51:37,380 INFO  L87              Difference]: Start difference. First operand 62 states and 66 transitions. Second operand  has 11 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8)
[2023-04-03 01:51:37,722 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-03 01:51:37,722 INFO  L93              Difference]: Finished difference Result 141 states and 155 transitions.
[2023-04-03 01:51:37,723 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. 
[2023-04-03 01:51:37,723 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 39
[2023-04-03 01:51:37,724 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-03 01:51:37,725 INFO  L225             Difference]: With dead ends: 141
[2023-04-03 01:51:37,725 INFO  L226             Difference]: Without dead ends: 109
[2023-04-03 01:51:37,725 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272
[2023-04-03 01:51:37,726 INFO  L413           NwaCegarLoop]: 28 mSDtfsCounter, 101 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-04-03 01:51:37,726 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 107 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-04-03 01:51:37,727 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 109 states.
[2023-04-03 01:51:37,762 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 94.
[2023-04-03 01:51:37,762 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 94 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 53 states have internal predecessors, (58), 21 states have call successors, (21), 21 states have call predecessors, (21), 21 states have return successors, (22), 19 states have call predecessors, (22), 20 states have call successors, (22)
[2023-04-03 01:51:37,767 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 101 transitions.
[2023-04-03 01:51:37,768 INFO  L78                 Accepts]: Start accepts. Automaton has 94 states and 101 transitions. Word has length 39
[2023-04-03 01:51:37,768 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-03 01:51:37,768 INFO  L495      AbstractCegarLoop]: Abstraction has 94 states and 101 transitions.
[2023-04-03 01:51:37,768 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8)
[2023-04-03 01:51:37,769 INFO  L276                IsEmpty]: Start isEmpty. Operand 94 states and 101 transitions.
[2023-04-03 01:51:37,771 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 40
[2023-04-03 01:51:37,771 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-03 01:51:37,771 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]
[2023-04-03 01:51:37,771 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-04-03 01:51:37,771 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-03 01:51:37,771 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-03 01:51:37,772 INFO  L85        PathProgramCache]: Analyzing trace with hash -25533350, now seen corresponding path program 1 times
[2023-04-03 01:51:37,772 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-03 01:51:37,772 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145932367]
[2023-04-03 01:51:37,772 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-03 01:51:37,772 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-03 01:51:37,819 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-03 01:51:39,037 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-03 01:51:39,038 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-03 01:51:39,038 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145932367]
[2023-04-03 01:51:39,038 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145932367] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-03 01:51:39,038 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-03 01:51:39,038 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21
[2023-04-03 01:51:39,038 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114804477]
[2023-04-03 01:51:39,038 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-03 01:51:39,039 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 21 states
[2023-04-03 01:51:39,039 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-03 01:51:39,039 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2023-04-03 01:51:39,039 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420
[2023-04-03 01:51:39,039 INFO  L87              Difference]: Start difference. First operand 94 states and 101 transitions. Second operand  has 21 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 12 states have internal predecessors, (21), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8)
[2023-04-03 01:51:39,739 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-03 01:51:39,739 INFO  L93              Difference]: Finished difference Result 179 states and 194 transitions.
[2023-04-03 01:51:39,739 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. 
[2023-04-03 01:51:39,740 INFO  L78                 Accepts]: Start accepts. Automaton has  has 21 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 12 states have internal predecessors, (21), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 39
[2023-04-03 01:51:39,740 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-03 01:51:39,743 INFO  L225             Difference]: With dead ends: 179
[2023-04-03 01:51:39,743 INFO  L226             Difference]: Without dead ends: 118
[2023-04-03 01:51:39,747 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190
[2023-04-03 01:51:39,748 INFO  L413           NwaCegarLoop]: 22 mSDtfsCounter, 193 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2023-04-03 01:51:39,749 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 132 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2023-04-03 01:51:39,750 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 118 states.
[2023-04-03 01:51:39,769 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94.
[2023-04-03 01:51:39,770 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 94 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 53 states have internal predecessors, (57), 21 states have call successors, (21), 21 states have call predecessors, (21), 21 states have return successors, (22), 19 states have call predecessors, (22), 20 states have call successors, (22)
[2023-04-03 01:51:39,772 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions.
[2023-04-03 01:51:39,772 INFO  L78                 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 39
[2023-04-03 01:51:39,772 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-03 01:51:39,772 INFO  L495      AbstractCegarLoop]: Abstraction has 94 states and 100 transitions.
[2023-04-03 01:51:39,772 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 21 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 12 states have internal predecessors, (21), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8)
[2023-04-03 01:51:39,773 INFO  L276                IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions.
[2023-04-03 01:51:39,774 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 41
[2023-04-03 01:51:39,774 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-03 01:51:39,774 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]
[2023-04-03 01:51:39,774 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-04-03 01:51:39,774 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-03 01:51:39,774 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-03 01:51:39,775 INFO  L85        PathProgramCache]: Analyzing trace with hash 326723974, now seen corresponding path program 1 times
[2023-04-03 01:51:39,775 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-03 01:51:39,775 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787658754]
[2023-04-03 01:51:39,775 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-03 01:51:39,775 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-03 01:51:39,793 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-03 01:51:40,342 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-03 01:51:40,342 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-03 01:51:40,342 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787658754]
[2023-04-03 01:51:40,343 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787658754] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-03 01:51:40,343 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-03 01:51:40,343 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13
[2023-04-03 01:51:40,343 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286661538]
[2023-04-03 01:51:40,343 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-03 01:51:40,344 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 13 states
[2023-04-03 01:51:40,344 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-03 01:51:40,344 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2023-04-03 01:51:40,345 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156
[2023-04-03 01:51:40,345 INFO  L87              Difference]: Start difference. First operand 94 states and 100 transitions. Second operand  has 13 states, 8 states have (on average 2.75) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8)
[2023-04-03 01:51:40,582 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-03 01:51:40,582 INFO  L93              Difference]: Finished difference Result 128 states and 143 transitions.
[2023-04-03 01:51:40,582 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2023-04-03 01:51:40,582 INFO  L78                 Accepts]: Start accepts. Automaton has  has 13 states, 8 states have (on average 2.75) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 40
[2023-04-03 01:51:40,583 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-03 01:51:40,583 INFO  L225             Difference]: With dead ends: 128
[2023-04-03 01:51:40,584 INFO  L226             Difference]: Without dead ends: 126
[2023-04-03 01:51:40,584 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462
[2023-04-03 01:51:40,585 INFO  L413           NwaCegarLoop]: 49 mSDtfsCounter, 35 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-04-03 01:51:40,585 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 517 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-04-03 01:51:40,585 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 126 states.
[2023-04-03 01:51:40,606 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 102.
[2023-04-03 01:51:40,606 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 102 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 59 states have internal predecessors, (62), 22 states have call successors, (22), 22 states have call predecessors, (22), 23 states have return successors, (24), 20 states have call predecessors, (24), 21 states have call successors, (24)
[2023-04-03 01:51:40,607 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 108 transitions.
[2023-04-03 01:51:40,607 INFO  L78                 Accepts]: Start accepts. Automaton has 102 states and 108 transitions. Word has length 40
[2023-04-03 01:51:40,607 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-03 01:51:40,607 INFO  L495      AbstractCegarLoop]: Abstraction has 102 states and 108 transitions.
[2023-04-03 01:51:40,607 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 13 states, 8 states have (on average 2.75) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8)
[2023-04-03 01:51:40,607 INFO  L276                IsEmpty]: Start isEmpty. Operand 102 states and 108 transitions.
[2023-04-03 01:51:40,608 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 66
[2023-04-03 01:51:40,608 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-03 01:51:40,608 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-03 01:51:40,608 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-04-03 01:51:40,608 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-03 01:51:40,609 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-03 01:51:40,609 INFO  L85        PathProgramCache]: Analyzing trace with hash 1442586269, now seen corresponding path program 1 times
[2023-04-03 01:51:40,609 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-03 01:51:40,609 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307989532]
[2023-04-03 01:51:40,609 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-03 01:51:40,609 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-03 01:51:40,697 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-03 01:51:45,757 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2023-04-03 01:51:45,757 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-03 01:51:45,757 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307989532]
[2023-04-03 01:51:45,757 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307989532] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-03 01:51:45,757 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343284051]
[2023-04-03 01:51:45,758 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-03 01:51:45,758 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-03 01:51:45,758 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-03 01:51:45,761 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)
[2023-04-03 01:51:45,770 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-04-03 01:51:45,907 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-03 01:51:45,916 INFO  L262         TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 147 conjunts are in the unsatisfiable core
[2023-04-03 01:51:45,939 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-03 01:52:04,459 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-03 01:52:04,460 INFO  L327         TraceCheckSpWp]: Computing backward predicates...