/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 EqDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr.7.1.ufo.UNBOUNDED.pals.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-04-01 12:25:33,530 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-04-01 12:25:33,532 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2023-04-01 12:25:33,566 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2023-04-01 12:25:33,567 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2023-04-01 12:25:33,569 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2023-04-01 12:25:33,574 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2023-04-01 12:25:33,576 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2023-04-01 12:25:33,580 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2023-04-01 12:25:33,585 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2023-04-01 12:25:33,586 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2023-04-01 12:25:33,587 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2023-04-01 12:25:33,587 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
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[2023-04-01 12:25:33,588 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2023-04-01 12:25:33,589 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2023-04-01 12:25:33,590 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2023-04-01 12:25:33,590 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2023-04-01 12:25:33,592 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2023-04-01 12:25:33,593 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2023-04-01 12:25:33,594 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2023-04-01 12:25:33,598 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2023-04-01 12:25:33,599 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2023-04-01 12:25:33,601 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2023-04-01 12:25:33,611 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2023-04-01 12:25:33,611 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
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[2023-04-01 12:25:33,614 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2023-04-01 12:25:33,614 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
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[2023-04-01 12:25:33,616 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2023-04-01 12:25:33,617 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2023-04-01 12:25:33,618 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
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[2023-04-01 12:25:33,619 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-04-01 12:25:33,620 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-04-01 12:25:33,621 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 12:25:33,655 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-04-01 12:25:33,655 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-04-01 12:25:33,656 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-04-01 12:25:33,656 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-04-01 12:25:33,656 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-04-01 12:25:33,656 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-04-01 12:25:33,657 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-04-01 12:25:33,657 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-04-01 12:25:33,657 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-04-01 12:25:33,657 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-04-01 12:25:33,657 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-04-01 12:25:33,657 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-04-01 12:25:33,657 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-04-01 12:25:33,657 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-04-01 12:25:33,657 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-04-01 12:25:33,658 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-04-01 12:25:33,658 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-04-01 12:25:33,658 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-04-01 12:25:33,659 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-04-01 12:25:33,659 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-04-01 12:25:33,659 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-04-01 12:25:33,659 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-04-01 12:25:33,659 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-04-01 12:25:33,659 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-04-01 12:25:33,659 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-04-01 12:25:33,659 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-04-01 12:25:33,660 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-04-01 12:25:33,660 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-04-01 12:25:33,660 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-04-01 12:25:33,660 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-04-01 12:25:33,660 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-04-01 12:25:33,660 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-04-01 12:25:33,660 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 12:25:33,663 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-04-01 12:25:33,663 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-04-01 12:25:33,664 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-04-01 12:25:33,664 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-04-01 12:25:33,664 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-04-01 12:25:33,665 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-04-01 12:25:33,665 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-04-01 12:25:33,665 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-04-01 12:25:33,665 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain
[2023-04-01 12:25:33,900 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-04-01 12:25:33,924 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-04-01 12:25:33,927 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-04-01 12:25:33,929 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-04-01 12:25:33,929 INFO  L275        PluginConnector]: CDTParser initialized
[2023-04-01 12:25:33,931 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.7.1.ufo.UNBOUNDED.pals.c
[2023-04-01 12:25:35,197 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-04-01 12:25:35,415 INFO  L351              CDTParser]: Found 1 translation units.
[2023-04-01 12:25:35,416 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.7.1.ufo.UNBOUNDED.pals.c
[2023-04-01 12:25:35,426 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2842a722/c66de0c5f6844d2d98eeea467760c2ee/FLAG8d0481be9
[2023-04-01 12:25:35,442 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2842a722/c66de0c5f6844d2d98eeea467760c2ee
[2023-04-01 12:25:35,445 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-04-01 12:25:35,447 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-04-01 12:25:35,448 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-04-01 12:25:35,448 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-04-01 12:25:35,451 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-04-01 12:25:35,452 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:25:35" (1/1) ...
[2023-04-01 12:25:35,453 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c90d28c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:35, skipping insertion in model container
[2023-04-01 12:25:35,454 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:25:35" (1/1) ...
[2023-04-01 12:25:35,460 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-04-01 12:25:35,508 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-04-01 12:25:35,760 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.7.1.ufo.UNBOUNDED.pals.c[20084,20097]
[2023-04-01 12:25:35,767 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 12:25:35,780 INFO  L203         MainTranslator]: Completed pre-run
[2023-04-01 12:25:35,856 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.7.1.ufo.UNBOUNDED.pals.c[20084,20097]
[2023-04-01 12:25:35,857 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 12:25:35,884 INFO  L208         MainTranslator]: Completed translation
[2023-04-01 12:25:35,884 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:35 WrapperNode
[2023-04-01 12:25:35,884 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-04-01 12:25:35,885 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-04-01 12:25:35,885 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-04-01 12:25:35,886 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-04-01 12:25:35,896 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:35" (1/1) ...
[2023-04-01 12:25:35,896 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:35" (1/1) ...
[2023-04-01 12:25:35,907 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:35" (1/1) ...
[2023-04-01 12:25:35,907 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:35" (1/1) ...
[2023-04-01 12:25:35,922 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:35" (1/1) ...
[2023-04-01 12:25:35,933 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:35" (1/1) ...
[2023-04-01 12:25:35,935 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:35" (1/1) ...
[2023-04-01 12:25:35,937 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:35" (1/1) ...
[2023-04-01 12:25:35,945 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-04-01 12:25:35,946 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-04-01 12:25:35,946 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-04-01 12:25:35,947 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-04-01 12:25:35,947 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:35" (1/1) ...
[2023-04-01 12:25:35,953 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 12:25:35,961 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 12:25:35,972 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 12:25:35,982 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 12:25:36,010 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-04-01 12:25:36,011 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-04-01 12:25:36,011 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-04-01 12:25:36,011 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2023-04-01 12:25:36,011 INFO  L138     BoogieDeclarations]: Found implementation of procedure node1
[2023-04-01 12:25:36,011 INFO  L138     BoogieDeclarations]: Found implementation of procedure node2
[2023-04-01 12:25:36,011 INFO  L138     BoogieDeclarations]: Found implementation of procedure node3
[2023-04-01 12:25:36,011 INFO  L138     BoogieDeclarations]: Found implementation of procedure node4
[2023-04-01 12:25:36,011 INFO  L138     BoogieDeclarations]: Found implementation of procedure node5
[2023-04-01 12:25:36,012 INFO  L138     BoogieDeclarations]: Found implementation of procedure node6
[2023-04-01 12:25:36,012 INFO  L138     BoogieDeclarations]: Found implementation of procedure node7
[2023-04-01 12:25:36,012 INFO  L138     BoogieDeclarations]: Found implementation of procedure init
[2023-04-01 12:25:36,012 INFO  L138     BoogieDeclarations]: Found implementation of procedure check
[2023-04-01 12:25:36,012 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-04-01 12:25:36,012 INFO  L138     BoogieDeclarations]: Found implementation of procedure assert
[2023-04-01 12:25:36,013 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-04-01 12:25:36,013 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-04-01 12:25:36,014 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-04-01 12:25:36,014 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-04-01 12:25:36,014 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2023-04-01 12:25:36,014 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2023-04-01 12:25:36,014 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar
[2023-04-01 12:25:36,014 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2023-04-01 12:25:36,014 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2023-04-01 12:25:36,014 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2023-04-01 12:25:36,014 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2023-04-01 12:25:36,014 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2023-04-01 12:25:36,015 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2023-04-01 12:25:36,015 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2023-04-01 12:25:36,015 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2023-04-01 12:25:36,015 INFO  L130     BoogieDeclarations]: Found specification of procedure node5
[2023-04-01 12:25:36,015 INFO  L130     BoogieDeclarations]: Found specification of procedure node6
[2023-04-01 12:25:36,015 INFO  L130     BoogieDeclarations]: Found specification of procedure node7
[2023-04-01 12:25:36,015 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2023-04-01 12:25:36,015 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2023-04-01 12:25:36,015 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-04-01 12:25:36,015 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-04-01 12:25:36,016 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-04-01 12:25:36,016 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-04-01 12:25:36,016 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-04-01 12:25:36,016 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-04-01 12:25:36,016 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-04-01 12:25:36,167 INFO  L236             CfgBuilder]: Building ICFG
[2023-04-01 12:25:36,169 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-04-01 12:25:36,609 INFO  L277             CfgBuilder]: Performing block encoding
[2023-04-01 12:25:37,231 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-04-01 12:25:37,231 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-04-01 12:25:37,234 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:25:37 BoogieIcfgContainer
[2023-04-01 12:25:37,234 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-04-01 12:25:37,236 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-04-01 12:25:37,236 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-04-01 12:25:37,239 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-04-01 12:25:37,239 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:25:35" (1/3) ...
[2023-04-01 12:25:37,239 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47aec12f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:25:37, skipping insertion in model container
[2023-04-01 12:25:37,240 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:35" (2/3) ...
[2023-04-01 12:25:37,241 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47aec12f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:25:37, skipping insertion in model container
[2023-04-01 12:25:37,241 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:25:37" (3/3) ...
[2023-04-01 12:25:37,242 INFO  L112   eAbstractionObserver]: Analyzing ICFG pals_lcr.7.1.ufo.UNBOUNDED.pals.c
[2023-04-01 12:25:37,257 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-04-01 12:25:37,258 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-04-01 12:25:37,307 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-04-01 12:25:37,314 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;@19c0c2ea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-04-01 12:25:37,314 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-04-01 12:25:37,319 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 55 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 29 states have internal predecessors, (33), 13 states have call successors, (13), 13 states have call predecessors, (13), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13)
[2023-04-01 12:25:37,326 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 47
[2023-04-01 12:25:37,326 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 12:25:37,327 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, 1, 1, 1]
[2023-04-01 12:25:37,327 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 12:25:37,333 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 12:25:37,334 INFO  L85        PathProgramCache]: Analyzing trace with hash -1340918493, now seen corresponding path program 1 times
[2023-04-01 12:25:37,342 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 12:25:37,342 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371718008]
[2023-04-01 12:25:37,342 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 12:25:37,343 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 12:25:37,746 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 12:25:43,222 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 12:25:43,223 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 12:25:43,223 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371718008]
[2023-04-01 12:25:43,224 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371718008] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 12:25:43,224 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 12:25:43,224 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31
[2023-04-01 12:25:43,225 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086701291]
[2023-04-01 12:25:43,226 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 12:25:43,230 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 31 states
[2023-04-01 12:25:43,230 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 12:25:43,263 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants.
[2023-04-01 12:25:43,267 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930
[2023-04-01 12:25:43,269 INFO  L87              Difference]: Start difference. First operand  has 55 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 29 states have internal predecessors, (33), 13 states have call successors, (13), 13 states have call predecessors, (13), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand  has 31 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 12 states have call successors, (13), 10 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11)
[2023-04-01 12:25:45,147 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 12:25:45,147 INFO  L93              Difference]: Finished difference Result 133 states and 151 transitions.
[2023-04-01 12:25:45,148 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. 
[2023-04-01 12:25:45,150 INFO  L78                 Accepts]: Start accepts. Automaton has  has 31 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 12 states have call successors, (13), 10 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 46
[2023-04-01 12:25:45,151 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 12:25:45,158 INFO  L225             Difference]: With dead ends: 133
[2023-04-01 12:25:45,158 INFO  L226             Difference]: Without dead ends: 91
[2023-04-01 12:25:45,165 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=639, Invalid=2667, Unknown=0, NotChecked=0, Total=3306
[2023-04-01 12:25:45,169 INFO  L413           NwaCegarLoop]: 23 mSDtfsCounter, 414 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2023-04-01 12:25:45,169 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 133 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2023-04-01 12:25:45,186 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 91 states.
[2023-04-01 12:25:45,234 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80.
[2023-04-01 12:25:45,236 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 80 states, 38 states have (on average 1.105263157894737) internal successors, (42), 39 states have internal predecessors, (42), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21)
[2023-04-01 12:25:45,240 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions.
[2023-04-01 12:25:45,241 INFO  L78                 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 46
[2023-04-01 12:25:45,242 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 12:25:45,242 INFO  L495      AbstractCegarLoop]: Abstraction has 80 states and 84 transitions.
[2023-04-01 12:25:45,242 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 31 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 12 states have call successors, (13), 10 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11)
[2023-04-01 12:25:45,242 INFO  L276                IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions.
[2023-04-01 12:25:45,245 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 49
[2023-04-01 12:25:45,245 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 12:25:45,245 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, 1, 1, 1, 1, 1]
[2023-04-01 12:25:45,246 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-04-01 12:25:45,246 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 12:25:45,247 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 12:25:45,247 INFO  L85        PathProgramCache]: Analyzing trace with hash 1651865210, now seen corresponding path program 1 times
[2023-04-01 12:25:45,247 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 12:25:45,247 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378307637]
[2023-04-01 12:25:45,247 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 12:25:45,248 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 12:25:45,388 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 12:25:46,037 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 12:25:46,038 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 12:25:46,039 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378307637]
[2023-04-01 12:25:46,041 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378307637] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 12:25:46,041 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 12:25:46,045 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11
[2023-04-01 12:25:46,046 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200003686]
[2023-04-01 12:25:46,046 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 12:25:46,047 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2023-04-01 12:25:46,048 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 12:25:46,048 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2023-04-01 12:25:46,048 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110
[2023-04-01 12:25:46,049 INFO  L87              Difference]: Start difference. First operand 80 states and 84 transitions. Second operand  has 11 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11)
[2023-04-01 12:25:46,618 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 12:25:46,618 INFO  L93              Difference]: Finished difference Result 177 states and 191 transitions.
[2023-04-01 12:25:46,619 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2023-04-01 12:25:46,619 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 48
[2023-04-01 12:25:46,619 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 12:25:46,621 INFO  L225             Difference]: With dead ends: 177
[2023-04-01 12:25:46,621 INFO  L226             Difference]: Without dead ends: 136
[2023-04-01 12:25:46,622 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306
[2023-04-01 12:25:46,623 INFO  L413           NwaCegarLoop]: 33 mSDtfsCounter, 99 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2023-04-01 12:25:46,623 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 124 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2023-04-01 12:25:46,624 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 136 states.
[2023-04-01 12:25:46,670 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 121.
[2023-04-01 12:25:46,671 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 121 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 62 states have internal predecessors, (67), 30 states have call successors, (30), 30 states have call predecessors, (30), 30 states have return successors, (31), 28 states have call predecessors, (31), 29 states have call successors, (31)
[2023-04-01 12:25:46,674 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 128 transitions.
[2023-04-01 12:25:46,674 INFO  L78                 Accepts]: Start accepts. Automaton has 121 states and 128 transitions. Word has length 48
[2023-04-01 12:25:46,674 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 12:25:46,675 INFO  L495      AbstractCegarLoop]: Abstraction has 121 states and 128 transitions.
[2023-04-01 12:25:46,675 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11)
[2023-04-01 12:25:46,675 INFO  L276                IsEmpty]: Start isEmpty. Operand 121 states and 128 transitions.
[2023-04-01 12:25:46,678 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 49
[2023-04-01 12:25:46,678 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 12:25:46,678 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, 1, 1, 1, 1, 1]
[2023-04-01 12:25:46,678 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-04-01 12:25:46,678 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 12:25:46,679 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 12:25:46,679 INFO  L85        PathProgramCache]: Analyzing trace with hash -1818241941, now seen corresponding path program 1 times
[2023-04-01 12:25:46,679 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 12:25:46,679 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136572525]
[2023-04-01 12:25:46,679 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 12:25:46,679 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 12:25:46,835 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 12:25:50,312 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 12:25:50,313 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 12:25:50,313 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136572525]
[2023-04-01 12:25:50,313 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136572525] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 12:25:50,313 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 12:25:50,313 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31
[2023-04-01 12:25:50,314 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087085612]
[2023-04-01 12:25:50,314 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 12:25:50,314 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 31 states
[2023-04-01 12:25:50,314 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 12:25:50,315 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants.
[2023-04-01 12:25:50,316 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930
[2023-04-01 12:25:50,316 INFO  L87              Difference]: Start difference. First operand 121 states and 128 transitions. Second operand  has 31 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 12 states have call successors, (13), 10 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11)
[2023-04-01 12:25:52,523 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 12:25:52,523 INFO  L93              Difference]: Finished difference Result 224 states and 239 transitions.
[2023-04-01 12:25:52,524 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. 
[2023-04-01 12:25:52,524 INFO  L78                 Accepts]: Start accepts. Automaton has  has 31 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 12 states have call successors, (13), 10 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 48
[2023-04-01 12:25:52,525 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 12:25:52,526 INFO  L225             Difference]: With dead ends: 224
[2023-04-01 12:25:52,526 INFO  L226             Difference]: Without dead ends: 145
[2023-04-01 12:25:52,528 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=764, Invalid=3142, Unknown=0, NotChecked=0, Total=3906
[2023-04-01 12:25:52,529 INFO  L413           NwaCegarLoop]: 23 mSDtfsCounter, 513 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2023-04-01 12:25:52,530 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 136 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2023-04-01 12:25:52,530 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 145 states.
[2023-04-01 12:25:52,563 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 121.
[2023-04-01 12:25:52,564 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 121 states, 60 states have (on average 1.1) internal successors, (66), 62 states have internal predecessors, (66), 30 states have call successors, (30), 30 states have call predecessors, (30), 30 states have return successors, (31), 28 states have call predecessors, (31), 29 states have call successors, (31)
[2023-04-01 12:25:52,564 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 127 transitions.
[2023-04-01 12:25:52,565 INFO  L78                 Accepts]: Start accepts. Automaton has 121 states and 127 transitions. Word has length 48
[2023-04-01 12:25:52,565 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 12:25:52,565 INFO  L495      AbstractCegarLoop]: Abstraction has 121 states and 127 transitions.
[2023-04-01 12:25:52,565 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 31 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 12 states have call successors, (13), 10 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11)
[2023-04-01 12:25:52,565 INFO  L276                IsEmpty]: Start isEmpty. Operand 121 states and 127 transitions.
[2023-04-01 12:25:52,566 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 50
[2023-04-01 12:25:52,566 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 12:25:52,566 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, 1, 1, 1, 1, 1, 1]
[2023-04-01 12:25:52,567 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-04-01 12:25:52,567 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 12:25:52,567 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 12:25:52,567 INFO  L85        PathProgramCache]: Analyzing trace with hash -965407439, now seen corresponding path program 1 times
[2023-04-01 12:25:52,567 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 12:25:52,568 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651816109]
[2023-04-01 12:25:52,568 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 12:25:52,568 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 12:25:52,596 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 12:25:54,213 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 12:25:54,213 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 12:25:54,213 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651816109]
[2023-04-01 12:25:54,213 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651816109] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 12:25:54,214 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 12:25:54,215 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13
[2023-04-01 12:25:54,215 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319172822]
[2023-04-01 12:25:54,215 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 12:25:54,216 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 13 states
[2023-04-01 12:25:54,216 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 12:25:54,217 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2023-04-01 12:25:54,217 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156
[2023-04-01 12:25:54,217 INFO  L87              Difference]: Start difference. First operand 121 states and 127 transitions. Second operand  has 13 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11)
[2023-04-01 12:25:54,570 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 12:25:54,571 INFO  L93              Difference]: Finished difference Result 158 states and 176 transitions.
[2023-04-01 12:25:54,571 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2023-04-01 12:25:54,571 INFO  L78                 Accepts]: Start accepts. Automaton has  has 13 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 49
[2023-04-01 12:25:54,572 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 12:25:54,577 INFO  L225             Difference]: With dead ends: 158
[2023-04-01 12:25:54,578 INFO  L226             Difference]: Without dead ends: 156
[2023-04-01 12:25:54,578 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 12:25:54,588 INFO  L413           NwaCegarLoop]: 61 mSDtfsCounter, 35 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-04-01 12:25:54,588 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 652 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-04-01 12:25:54,589 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 156 states.
[2023-04-01 12:25:54,637 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 129.
[2023-04-01 12:25:54,639 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 129 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 68 states have internal predecessors, (71), 31 states have call successors, (31), 31 states have call predecessors, (31), 32 states have return successors, (33), 29 states have call predecessors, (33), 30 states have call successors, (33)
[2023-04-01 12:25:54,640 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 135 transitions.
[2023-04-01 12:25:54,641 INFO  L78                 Accepts]: Start accepts. Automaton has 129 states and 135 transitions. Word has length 49
[2023-04-01 12:25:54,641 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 12:25:54,641 INFO  L495      AbstractCegarLoop]: Abstraction has 129 states and 135 transitions.
[2023-04-01 12:25:54,641 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 13 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11)
[2023-04-01 12:25:54,641 INFO  L276                IsEmpty]: Start isEmpty. Operand 129 states and 135 transitions.
[2023-04-01 12:25:54,649 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 84
[2023-04-01 12:25:54,649 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 12:25:54,650 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, 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 12:25:54,650 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-04-01 12:25:54,650 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 12:25:54,650 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 12:25:54,650 INFO  L85        PathProgramCache]: Analyzing trace with hash -1310352469, now seen corresponding path program 1 times
[2023-04-01 12:25:54,651 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 12:25:54,651 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342499502]
[2023-04-01 12:25:54,652 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 12:25:54,652 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 12:25:55,096 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 12:26:14,286 INFO  L134       CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2023-04-01 12:26:14,287 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 12:26:14,287 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342499502]
[2023-04-01 12:26:14,287 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342499502] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-01 12:26:14,287 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105867958]
[2023-04-01 12:26:14,287 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 12:26:14,288 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 12:26:14,288 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 12:26:14,295 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 12:26:14,297 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 12:26:14,608 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 12:26:14,637 INFO  L262         TraceCheckSpWp]: Trace formula consists of 1046 conjuncts, 274 conjunts are in the unsatisfiable core
[2023-04-01 12:26:14,657 INFO  L285         TraceCheckSpWp]: Computing forward predicates...