/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.6.ufo.BOUNDED-12.pals.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-04-03 01:54:09,358 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-04-03 01:54:09,359 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2023-04-03 01:54:09,396 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2023-04-03 01:54:09,397 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2023-04-03 01:54:09,399 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2023-04-03 01:54:09,404 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2023-04-03 01:54:09,406 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2023-04-03 01:54:09,408 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2023-04-03 01:54:09,412 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2023-04-03 01:54:09,413 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2023-04-03 01:54:09,414 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2023-04-03 01:54:09,415 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2023-04-03 01:54:09,416 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2023-04-03 01:54:09,417 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2023-04-03 01:54:09,418 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2023-04-03 01:54:09,419 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2023-04-03 01:54:09,419 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2023-04-03 01:54:09,421 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2023-04-03 01:54:09,426 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2023-04-03 01:54:09,427 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2023-04-03 01:54:09,427 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2023-04-03 01:54:09,428 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2023-04-03 01:54:09,429 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2023-04-03 01:54:09,437 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2023-04-03 01:54:09,437 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2023-04-03 01:54:09,437 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2023-04-03 01:54:09,438 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2023-04-03 01:54:09,438 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2023-04-03 01:54:09,439 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2023-04-03 01:54:09,439 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2023-04-03 01:54:09,440 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2023-04-03 01:54:09,441 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2023-04-03 01:54:09,441 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2023-04-03 01:54:09,442 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2023-04-03 01:54:09,442 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2023-04-03 01:54:09,442 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2023-04-03 01:54:09,443 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2023-04-03 01:54:09,443 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2023-04-03 01:54:09,444 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2023-04-03 01:54:09,444 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-04-03 01:54:09,445 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 01:54:09,472 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-04-03 01:54:09,472 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-04-03 01:54:09,473 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-04-03 01:54:09,473 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-04-03 01:54:09,474 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-04-03 01:54:09,474 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-04-03 01:54:09,474 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-04-03 01:54:09,474 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-04-03 01:54:09,474 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-04-03 01:54:09,474 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-04-03 01:54:09,475 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-04-03 01:54:09,475 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-04-03 01:54:09,475 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-04-03 01:54:09,475 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-04-03 01:54:09,475 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-04-03 01:54:09,475 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-04-03 01:54:09,476 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-04-03 01:54:09,476 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-04-03 01:54:09,476 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-04-03 01:54:09,476 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-04-03 01:54:09,476 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-04-03 01:54:09,476 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-04-03 01:54:09,477 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-04-03 01:54:09,477 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-04-03 01:54:09,477 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-04-03 01:54:09,477 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-04-03 01:54:09,477 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-04-03 01:54:09,477 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-04-03 01:54:09,478 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-04-03 01:54:09,478 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-04-03 01:54:09,478 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-04-03 01:54:09,478 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-04-03 01:54:09,478 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-03 01:54:09,478 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-04-03 01:54:09,478 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-04-03 01:54:09,479 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-04-03 01:54:09,479 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-04-03 01:54:09,479 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-04-03 01:54:09,479 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-04-03 01:54:09,479 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-04-03 01:54:09,479 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-04-03 01:54:09,479 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain
[2023-04-03 01:54:09,697 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-04-03 01:54:09,722 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-04-03 01:54:09,724 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-04-03 01:54:09,725 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-04-03 01:54:09,726 INFO  L275        PluginConnector]: CDTParser initialized
[2023-04-03 01:54:09,727 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.6.ufo.BOUNDED-12.pals.c
[2023-04-03 01:54:10,853 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-04-03 01:54:11,086 INFO  L351              CDTParser]: Found 1 translation units.
[2023-04-03 01:54:11,087 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.6.ufo.BOUNDED-12.pals.c
[2023-04-03 01:54:11,101 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/204ac187b/27a4f0fa8f6e4ce3bbb122c37a94ea7d/FLAG1047e93fa
[2023-04-03 01:54:11,115 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/204ac187b/27a4f0fa8f6e4ce3bbb122c37a94ea7d
[2023-04-03 01:54:11,117 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-04-03 01:54:11,119 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-04-03 01:54:11,122 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-04-03 01:54:11,122 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-04-03 01:54:11,125 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-04-03 01:54:11,126 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:54:11" (1/1) ...
[2023-04-03 01:54:11,127 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4272cbd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:54:11, skipping insertion in model container
[2023-04-03 01:54:11,127 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:54:11" (1/1) ...
[2023-04-03 01:54:11,142 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-04-03 01:54:11,179 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-04-03 01:54:11,338 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.6.ufo.BOUNDED-12.pals.c[15075,15088]
[2023-04-03 01:54:11,341 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-03 01:54:11,350 INFO  L203         MainTranslator]: Completed pre-run
[2023-04-03 01:54:11,393 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.6.ufo.BOUNDED-12.pals.c[15075,15088]
[2023-04-03 01:54:11,393 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-03 01:54:11,406 INFO  L208         MainTranslator]: Completed translation
[2023-04-03 01:54:11,407 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:54:11 WrapperNode
[2023-04-03 01:54:11,407 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-04-03 01:54:11,408 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-04-03 01:54:11,408 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-04-03 01:54:11,408 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-04-03 01:54:11,417 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:54:11" (1/1) ...
[2023-04-03 01:54:11,417 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:54:11" (1/1) ...
[2023-04-03 01:54:11,428 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:54:11" (1/1) ...
[2023-04-03 01:54:11,428 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:54:11" (1/1) ...
[2023-04-03 01:54:11,438 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:54:11" (1/1) ...
[2023-04-03 01:54:11,445 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:54:11" (1/1) ...
[2023-04-03 01:54:11,448 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:54:11" (1/1) ...
[2023-04-03 01:54:11,449 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:54:11" (1/1) ...
[2023-04-03 01:54:11,453 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-04-03 01:54:11,454 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-04-03 01:54:11,454 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-04-03 01:54:11,454 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-04-03 01:54:11,455 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:54:11" (1/1) ...
[2023-04-03 01:54:11,460 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-03 01:54:11,474 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-03 01:54:11,497 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 01:54:11,504 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 01:54:11,526 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-04-03 01:54:11,526 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-04-03 01:54:11,526 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-04-03 01:54:11,526 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2023-04-03 01:54:11,527 INFO  L138     BoogieDeclarations]: Found implementation of procedure node1
[2023-04-03 01:54:11,527 INFO  L138     BoogieDeclarations]: Found implementation of procedure node2
[2023-04-03 01:54:11,527 INFO  L138     BoogieDeclarations]: Found implementation of procedure node3
[2023-04-03 01:54:11,527 INFO  L138     BoogieDeclarations]: Found implementation of procedure node4
[2023-04-03 01:54:11,527 INFO  L138     BoogieDeclarations]: Found implementation of procedure node5
[2023-04-03 01:54:11,527 INFO  L138     BoogieDeclarations]: Found implementation of procedure node6
[2023-04-03 01:54:11,527 INFO  L138     BoogieDeclarations]: Found implementation of procedure init
[2023-04-03 01:54:11,527 INFO  L138     BoogieDeclarations]: Found implementation of procedure check
[2023-04-03 01:54:11,528 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-04-03 01:54:11,528 INFO  L138     BoogieDeclarations]: Found implementation of procedure assert
[2023-04-03 01:54:11,528 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-04-03 01:54:11,528 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-04-03 01:54:11,528 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-04-03 01:54:11,528 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-04-03 01:54:11,528 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2023-04-03 01:54:11,528 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2023-04-03 01:54:11,529 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2023-04-03 01:54:11,529 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2023-04-03 01:54:11,529 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2023-04-03 01:54:11,529 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2023-04-03 01:54:11,529 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2023-04-03 01:54:11,529 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2023-04-03 01:54:11,529 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2023-04-03 01:54:11,529 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2023-04-03 01:54:11,529 INFO  L130     BoogieDeclarations]: Found specification of procedure node5
[2023-04-03 01:54:11,530 INFO  L130     BoogieDeclarations]: Found specification of procedure node6
[2023-04-03 01:54:11,530 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2023-04-03 01:54:11,530 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2023-04-03 01:54:11,530 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-04-03 01:54:11,530 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-04-03 01:54:11,530 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-04-03 01:54:11,530 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-04-03 01:54:11,530 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-04-03 01:54:11,530 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-04-03 01:54:11,531 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-04-03 01:54:11,629 INFO  L236             CfgBuilder]: Building ICFG
[2023-04-03 01:54:11,631 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-04-03 01:54:12,105 INFO  L277             CfgBuilder]: Performing block encoding
[2023-04-03 01:54:12,517 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-04-03 01:54:12,517 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-04-03 01:54:12,519 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:54:12 BoogieIcfgContainer
[2023-04-03 01:54:12,519 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-04-03 01:54:12,522 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-04-03 01:54:12,523 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-04-03 01:54:12,525 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-04-03 01:54:12,525 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 01:54:11" (1/3) ...
[2023-04-03 01:54:12,526 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7964d157 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:54:12, skipping insertion in model container
[2023-04-03 01:54:12,526 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:54:11" (2/3) ...
[2023-04-03 01:54:12,526 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7964d157 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:54:12, skipping insertion in model container
[2023-04-03 01:54:12,526 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:54:12" (3/3) ...
[2023-04-03 01:54:12,528 INFO  L112   eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.BOUNDED-12.pals.c
[2023-04-03 01:54:12,543 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-04-03 01:54:12,544 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-04-03 01:54:12,599 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-04-03 01:54:12,605 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;@1b2c4122, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-04-03 01:54:12,606 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-04-03 01:54:12,611 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 53 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 28 states have internal predecessors, (33), 12 states have call successors, (12), 12 states have call predecessors, (12), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12)
[2023-04-03 01:54:12,618 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 44
[2023-04-03 01:54:12,619 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-03 01:54:12,620 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-03 01:54:12,620 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-03 01:54:12,627 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-03 01:54:12,627 INFO  L85        PathProgramCache]: Analyzing trace with hash -1225992123, now seen corresponding path program 1 times
[2023-04-03 01:54:12,634 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-03 01:54:12,635 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354059046]
[2023-04-03 01:54:12,635 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-03 01:54:12,636 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-03 01:54:13,001 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-03 01:54:16,754 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 01:54:16,754 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-03 01:54:16,755 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354059046]
[2023-04-03 01:54:16,755 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354059046] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-03 01:54:16,755 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-03 01:54:16,756 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28
[2023-04-03 01:54:16,757 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785704189]
[2023-04-03 01:54:16,757 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-03 01:54:16,761 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 28 states
[2023-04-03 01:54:16,761 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-03 01:54:16,784 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants.
[2023-04-03 01:54:16,786 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756
[2023-04-03 01:54:16,788 INFO  L87              Difference]: Start difference. First operand  has 53 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 28 states have internal predecessors, (33), 12 states have call successors, (12), 12 states have call predecessors, (12), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand  has 28 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 11 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2023-04-03 01:54:18,232 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-03 01:54:18,233 INFO  L93              Difference]: Finished difference Result 136 states and 151 transitions.
[2023-04-03 01:54:18,234 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. 
[2023-04-03 01:54:18,235 INFO  L78                 Accepts]: Start accepts. Automaton has  has 28 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 11 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 43
[2023-04-03 01:54:18,235 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-03 01:54:18,242 INFO  L225             Difference]: With dead ends: 136
[2023-04-03 01:54:18,242 INFO  L226             Difference]: Without dead ends: 87
[2023-04-03 01:54:18,246 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=495, Invalid=2157, Unknown=0, NotChecked=0, Total=2652
[2023-04-03 01:54:18,248 INFO  L413           NwaCegarLoop]: 27 mSDtfsCounter, 482 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2023-04-03 01:54:18,249 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 174 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2023-04-03 01:54:18,263 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 87 states.
[2023-04-03 01:54:18,296 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75.
[2023-04-03 01:54:18,298 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 75 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 38 states have internal predecessors, (41), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19)
[2023-04-03 01:54:18,299 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions.
[2023-04-03 01:54:18,300 INFO  L78                 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 43
[2023-04-03 01:54:18,300 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-03 01:54:18,301 INFO  L495      AbstractCegarLoop]: Abstraction has 75 states and 79 transitions.
[2023-04-03 01:54:18,301 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 28 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 11 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2023-04-03 01:54:18,301 INFO  L276                IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions.
[2023-04-03 01:54:18,303 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 46
[2023-04-03 01:54:18,303 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-03 01:54:18,303 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]
[2023-04-03 01:54:18,303 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-04-03 01:54:18,303 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-03 01:54:18,304 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-03 01:54:18,304 INFO  L85        PathProgramCache]: Analyzing trace with hash -1043507363, now seen corresponding path program 1 times
[2023-04-03 01:54:18,304 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-03 01:54:18,304 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443814648]
[2023-04-03 01:54:18,304 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-03 01:54:18,305 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-03 01:54:18,357 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-03 01:54:18,752 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 01:54:18,753 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-03 01:54:18,753 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443814648]
[2023-04-03 01:54:18,754 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443814648] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-03 01:54:18,754 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-03 01:54:18,755 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11
[2023-04-03 01:54:18,757 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525047675]
[2023-04-03 01:54:18,757 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-03 01:54:18,763 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2023-04-03 01:54:18,763 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-03 01:54:18,764 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2023-04-03 01:54:18,764 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110
[2023-04-03 01:54:18,764 INFO  L87              Difference]: Start difference. First operand 75 states and 79 transitions. Second operand  has 11 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10)
[2023-04-03 01:54:19,096 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-03 01:54:19,097 INFO  L93              Difference]: Finished difference Result 146 states and 157 transitions.
[2023-04-03 01:54:19,097 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. 
[2023-04-03 01:54:19,098 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 45
[2023-04-03 01:54:19,098 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-03 01:54:19,101 INFO  L225             Difference]: With dead ends: 146
[2023-04-03 01:54:19,101 INFO  L226             Difference]: Without dead ends: 107
[2023-04-03 01:54:19,102 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272
[2023-04-03 01:54:19,103 INFO  L413           NwaCegarLoop]: 26 mSDtfsCounter, 119 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-04-03 01:54:19,104 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 105 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-04-03 01:54:19,105 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 107 states.
[2023-04-03 01:54:19,124 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 78.
[2023-04-03 01:54:19,124 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 78 states, 40 states have (on average 1.125) internal successors, (45), 41 states have internal predecessors, (45), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18)
[2023-04-03 01:54:19,125 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions.
[2023-04-03 01:54:19,125 INFO  L78                 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 45
[2023-04-03 01:54:19,125 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-03 01:54:19,126 INFO  L495      AbstractCegarLoop]: Abstraction has 78 states and 82 transitions.
[2023-04-03 01:54:19,126 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10)
[2023-04-03 01:54:19,126 INFO  L276                IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions.
[2023-04-03 01:54:19,127 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 46
[2023-04-03 01:54:19,127 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-03 01:54:19,127 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]
[2023-04-03 01:54:19,127 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-04-03 01:54:19,127 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-03 01:54:19,128 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-03 01:54:19,128 INFO  L85        PathProgramCache]: Analyzing trace with hash 1459518989, now seen corresponding path program 1 times
[2023-04-03 01:54:19,128 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-03 01:54:19,128 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280174344]
[2023-04-03 01:54:19,128 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-03 01:54:19,128 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-03 01:54:19,256 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-03 01:54:22,050 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 01:54:22,050 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-03 01:54:22,050 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280174344]
[2023-04-03 01:54:22,051 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280174344] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-03 01:54:22,051 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-03 01:54:22,051 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28
[2023-04-03 01:54:22,051 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715717826]
[2023-04-03 01:54:22,051 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-03 01:54:22,052 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 28 states
[2023-04-03 01:54:22,052 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-03 01:54:22,053 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants.
[2023-04-03 01:54:22,053 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756
[2023-04-03 01:54:22,053 INFO  L87              Difference]: Start difference. First operand 78 states and 82 transitions. Second operand  has 28 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 11 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2023-04-03 01:54:23,918 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-03 01:54:23,918 INFO  L93              Difference]: Finished difference Result 146 states and 155 transitions.
[2023-04-03 01:54:23,918 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. 
[2023-04-03 01:54:23,919 INFO  L78                 Accepts]: Start accepts. Automaton has  has 28 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 11 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 45
[2023-04-03 01:54:23,919 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-03 01:54:23,920 INFO  L225             Difference]: With dead ends: 146
[2023-04-03 01:54:23,920 INFO  L226             Difference]: Without dead ends: 107
[2023-04-03 01:54:23,922 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=662, Invalid=2760, Unknown=0, NotChecked=0, Total=3422
[2023-04-03 01:54:23,923 INFO  L413           NwaCegarLoop]: 24 mSDtfsCounter, 495 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2023-04-03 01:54:23,923 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [505 Valid, 154 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2023-04-03 01:54:23,924 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 107 states.
[2023-04-03 01:54:23,944 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 78.
[2023-04-03 01:54:23,944 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 78 states, 40 states have (on average 1.1) internal successors, (44), 41 states have internal predecessors, (44), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18)
[2023-04-03 01:54:23,945 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions.
[2023-04-03 01:54:23,946 INFO  L78                 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 45
[2023-04-03 01:54:23,946 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-03 01:54:23,946 INFO  L495      AbstractCegarLoop]: Abstraction has 78 states and 81 transitions.
[2023-04-03 01:54:23,946 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 28 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 11 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2023-04-03 01:54:23,946 INFO  L276                IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions.
[2023-04-03 01:54:23,947 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 47
[2023-04-03 01:54:23,947 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-03 01:54:23,947 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]
[2023-04-03 01:54:23,948 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-04-03 01:54:23,948 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-03 01:54:23,948 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-03 01:54:23,948 INFO  L85        PathProgramCache]: Analyzing trace with hash -1555572408, now seen corresponding path program 1 times
[2023-04-03 01:54:23,948 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-03 01:54:23,949 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781657305]
[2023-04-03 01:54:23,949 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-03 01:54:23,949 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-03 01:54:23,973 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-03 01:54:25,120 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 01:54:25,120 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-03 01:54:25,121 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781657305]
[2023-04-03 01:54:25,121 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781657305] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-03 01:54:25,121 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-03 01:54:25,121 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13
[2023-04-03 01:54:25,121 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84677413]
[2023-04-03 01:54:25,121 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-03 01:54:25,122 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 13 states
[2023-04-03 01:54:25,122 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-03 01:54:25,122 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2023-04-03 01:54:25,122 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156
[2023-04-03 01:54:25,123 INFO  L87              Difference]: Start difference. First operand 78 states and 81 transitions. Second operand  has 13 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10)
[2023-04-03 01:54:25,378 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-03 01:54:25,378 INFO  L93              Difference]: Finished difference Result 119 states and 133 transitions.
[2023-04-03 01:54:25,378 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. 
[2023-04-03 01:54:25,378 INFO  L78                 Accepts]: Start accepts. Automaton has  has 13 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 46
[2023-04-03 01:54:25,379 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-03 01:54:25,380 INFO  L225             Difference]: With dead ends: 119
[2023-04-03 01:54:25,380 INFO  L226             Difference]: Without dead ends: 117
[2023-04-03 01:54:25,381 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462
[2023-04-03 01:54:25,381 INFO  L413           NwaCegarLoop]: 56 mSDtfsCounter, 39 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-04-03 01:54:25,382 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 614 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-04-03 01:54:25,382 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 117 states.
[2023-04-03 01:54:25,405 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 87.
[2023-04-03 01:54:25,406 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 87 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 48 states have internal predecessors, (50), 20 states have call successors, (20), 20 states have call predecessors, (20), 20 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20)
[2023-04-03 01:54:25,406 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions.
[2023-04-03 01:54:25,407 INFO  L78                 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 46
[2023-04-03 01:54:25,407 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-03 01:54:25,407 INFO  L495      AbstractCegarLoop]: Abstraction has 87 states and 90 transitions.
[2023-04-03 01:54:25,407 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 13 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10)
[2023-04-03 01:54:25,407 INFO  L276                IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions.
[2023-04-03 01:54:25,409 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 79
[2023-04-03 01:54:25,409 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-03 01:54:25,412 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, 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 01:54:25,413 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-04-03 01:54:25,413 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-03 01:54:25,413 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-03 01:54:25,413 INFO  L85        PathProgramCache]: Analyzing trace with hash -482165746, now seen corresponding path program 1 times
[2023-04-03 01:54:25,413 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-03 01:54:25,414 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645144746]
[2023-04-03 01:54:25,414 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-03 01:54:25,414 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-03 01:54:25,673 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-03 01:54:38,137 INFO  L134       CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2023-04-03 01:54:38,137 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-03 01:54:38,137 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645144746]
[2023-04-03 01:54:38,137 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645144746] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-03 01:54:38,138 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478965626]
[2023-04-03 01:54:38,138 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-03 01:54:38,138 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-03 01:54:38,138 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-03 01:54:38,149 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 01:54:38,154 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 01:54:38,458 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-03 01:54:38,472 INFO  L262         TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 235 conjunts are in the unsatisfiable core
[2023-04-03 01:54:38,502 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-03 01:55:20,120 WARN  L667   sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts.
[2023-04-03 01:55:45,212 INFO  L134       CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-03 01:55:45,212 INFO  L327         TraceCheckSpWp]: Computing backward predicates...