/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr.4.1.ufo.UNBOUNDED.pals.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-04-03 01:50:06,267 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-04-03 01:50:06,269 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2023-04-03 01:50:06,297 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2023-04-03 01:50:06,297 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2023-04-03 01:50:06,299 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2023-04-03 01:50:06,302 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2023-04-03 01:50:06,306 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2023-04-03 01:50:06,307 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2023-04-03 01:50:06,311 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2023-04-03 01:50:06,312 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2023-04-03 01:50:06,312 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2023-04-03 01:50:06,313 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2023-04-03 01:50:06,313 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2023-04-03 01:50:06,314 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2023-04-03 01:50:06,315 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2023-04-03 01:50:06,315 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2023-04-03 01:50:06,316 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2023-04-03 01:50:06,317 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2023-04-03 01:50:06,318 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2023-04-03 01:50:06,319 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2023-04-03 01:50:06,320 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2023-04-03 01:50:06,321 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2023-04-03 01:50:06,322 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2023-04-03 01:50:06,324 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2023-04-03 01:50:06,325 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2023-04-03 01:50:06,325 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2023-04-03 01:50:06,326 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2023-04-03 01:50:06,326 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2023-04-03 01:50:06,327 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2023-04-03 01:50:06,327 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2023-04-03 01:50:06,327 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2023-04-03 01:50:06,328 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2023-04-03 01:50:06,328 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2023-04-03 01:50:06,329 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2023-04-03 01:50:06,329 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2023-04-03 01:50:06,330 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-04-03 01:50:06,332 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-04-03 01:50:06,335 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 01:50:06,362 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-04-03 01:50:06,363 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-04-03 01:50:06,363 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-04-03 01:50:06,363 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-04-03 01:50:06,364 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-04-03 01:50:06,364 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-04-03 01:50:06,364 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-04-03 01:50:06,364 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-04-03 01:50:06,365 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-04-03 01:50:06,365 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-04-03 01:50:06,365 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-04-03 01:50:06,366 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-04-03 01:50:06,366 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-04-03 01:50:06,366 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-04-03 01:50:06,366 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-04-03 01:50:06,366 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-04-03 01:50:06,366 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-04-03 01:50:06,366 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-04-03 01:50:06,367 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-04-03 01:50:06,367 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-04-03 01:50:06,367 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-04-03 01:50:06,367 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-04-03 01:50:06,368 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-04-03 01:50:06,368 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-04-03 01:50:06,368 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-04-03 01:50:06,368 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-04-03 01:50:06,369 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-04-03 01:50:06,369 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-04-03 01:50:06,369 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-04-03 01:50:06,369 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-04-03 01:50:06,369 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-04-03 01:50:06,369 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-04-03 01:50:06,370 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-03 01:50:06,370 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-04-03 01:50:06,370 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-04-03 01:50:06,370 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-04-03 01:50:06,370 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-04-03 01:50:06,370 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-04-03 01:50:06,371 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-04-03 01:50:06,371 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-04-03 01:50:06,371 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-04-03 01:50:06,371 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain
[2023-04-03 01:50:06,602 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-04-03 01:50:06,619 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-04-03 01:50:06,621 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-04-03 01:50:06,622 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-04-03 01:50:06,622 INFO  L275        PluginConnector]: CDTParser initialized
[2023-04-03 01:50:06,623 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.4.1.ufo.UNBOUNDED.pals.c
[2023-04-03 01:50:07,768 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-04-03 01:50:08,051 INFO  L351              CDTParser]: Found 1 translation units.
[2023-04-03 01:50:08,051 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.4.1.ufo.UNBOUNDED.pals.c
[2023-04-03 01:50:08,061 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ae6dfe8d/29a1f8d5fe314c608c956324266edb02/FLAG0ab6d649b
[2023-04-03 01:50:08,076 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ae6dfe8d/29a1f8d5fe314c608c956324266edb02
[2023-04-03 01:50:08,078 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-04-03 01:50:08,080 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-04-03 01:50:08,083 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-04-03 01:50:08,083 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-04-03 01:50:08,086 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-04-03 01:50:08,087 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:50:08" (1/1) ...
[2023-04-03 01:50:08,087 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c58a6f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:50:08, skipping insertion in model container
[2023-04-03 01:50:08,088 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:50:08" (1/1) ...
[2023-04-03 01:50:08,095 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-04-03 01:50:08,134 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-04-03 01:50:08,313 WARN  L247   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.4.1.ufo.UNBOUNDED.pals.c[8342,8355]
[2023-04-03 01:50:08,316 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-03 01:50:08,324 INFO  L203         MainTranslator]: Completed pre-run
[2023-04-03 01:50:08,364 WARN  L247   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.4.1.ufo.UNBOUNDED.pals.c[8342,8355]
[2023-04-03 01:50:08,365 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-03 01:50:08,377 INFO  L208         MainTranslator]: Completed translation
[2023-04-03 01:50:08,377 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:50:08 WrapperNode
[2023-04-03 01:50:08,378 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-04-03 01:50:08,378 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-04-03 01:50:08,378 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-04-03 01:50:08,378 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-04-03 01:50:08,385 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:50:08" (1/1) ...
[2023-04-03 01:50:08,386 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:50:08" (1/1) ...
[2023-04-03 01:50:08,392 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:50:08" (1/1) ...
[2023-04-03 01:50:08,392 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:50:08" (1/1) ...
[2023-04-03 01:50:08,405 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:50:08" (1/1) ...
[2023-04-03 01:50:08,420 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:50:08" (1/1) ...
[2023-04-03 01:50:08,422 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:50:08" (1/1) ...
[2023-04-03 01:50:08,423 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:50:08" (1/1) ...
[2023-04-03 01:50:08,426 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-04-03 01:50:08,427 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-04-03 01:50:08,427 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-04-03 01:50:08,427 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-04-03 01:50:08,428 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:50:08" (1/1) ...
[2023-04-03 01:50:08,447 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-03 01:50:08,458 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-03 01:50:08,474 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 01:50:08,493 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 01:50:08,506 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-04-03 01:50:08,506 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-04-03 01:50:08,506 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-04-03 01:50:08,509 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2023-04-03 01:50:08,509 INFO  L138     BoogieDeclarations]: Found implementation of procedure node1
[2023-04-03 01:50:08,509 INFO  L138     BoogieDeclarations]: Found implementation of procedure node2
[2023-04-03 01:50:08,509 INFO  L138     BoogieDeclarations]: Found implementation of procedure node3
[2023-04-03 01:50:08,509 INFO  L138     BoogieDeclarations]: Found implementation of procedure node4
[2023-04-03 01:50:08,510 INFO  L138     BoogieDeclarations]: Found implementation of procedure init
[2023-04-03 01:50:08,510 INFO  L138     BoogieDeclarations]: Found implementation of procedure check
[2023-04-03 01:50:08,510 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-04-03 01:50:08,510 INFO  L138     BoogieDeclarations]: Found implementation of procedure assert
[2023-04-03 01:50:08,510 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-04-03 01:50:08,510 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-04-03 01:50:08,510 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-04-03 01:50:08,510 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-04-03 01:50:08,510 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2023-04-03 01:50:08,511 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2023-04-03 01:50:08,511 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar
[2023-04-03 01:50:08,511 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2023-04-03 01:50:08,511 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2023-04-03 01:50:08,511 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2023-04-03 01:50:08,511 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2023-04-03 01:50:08,511 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2023-04-03 01:50:08,511 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2023-04-03 01:50:08,511 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2023-04-03 01:50:08,511 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2023-04-03 01:50:08,512 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2023-04-03 01:50:08,512 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2023-04-03 01:50:08,512 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-04-03 01:50:08,512 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-04-03 01:50:08,512 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-04-03 01:50:08,512 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-04-03 01:50:08,512 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-04-03 01:50:08,512 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-04-03 01:50:08,512 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-04-03 01:50:08,651 INFO  L236             CfgBuilder]: Building ICFG
[2023-04-03 01:50:08,652 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-04-03 01:50:09,051 INFO  L277             CfgBuilder]: Performing block encoding
[2023-04-03 01:50:09,324 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-04-03 01:50:09,324 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-04-03 01:50:09,328 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:50:09 BoogieIcfgContainer
[2023-04-03 01:50:09,328 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-04-03 01:50:09,331 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-04-03 01:50:09,331 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-04-03 01:50:09,334 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-04-03 01:50:09,334 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 01:50:08" (1/3) ...
[2023-04-03 01:50:09,334 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ee7ef66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:50:09, skipping insertion in model container
[2023-04-03 01:50:09,335 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:50:08" (2/3) ...
[2023-04-03 01:50:09,335 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ee7ef66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:50:09, skipping insertion in model container
[2023-04-03 01:50:09,335 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:50:09" (3/3) ...
[2023-04-03 01:50:09,338 INFO  L112   eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.UNBOUNDED.pals.c
[2023-04-03 01:50:09,350 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-04-03 01:50:09,350 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-04-03 01:50:09,385 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-04-03 01:50:09,391 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;@7f9859b1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-04-03 01:50:09,391 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-04-03 01:50:09,395 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 46 states, 24 states have (on average 1.25) internal successors, (30), 26 states have internal predecessors, (30), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2023-04-03 01:50:09,401 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 38
[2023-04-03 01:50:09,402 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-03 01:50:09,402 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-03 01:50:09,403 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-03 01:50:09,406 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-03 01:50:09,406 INFO  L85        PathProgramCache]: Analyzing trace with hash -1995882099, now seen corresponding path program 1 times
[2023-04-03 01:50:09,412 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-03 01:50:09,413 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551680331]
[2023-04-03 01:50:09,413 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-03 01:50:09,413 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-03 01:50:09,673 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-03 01:50:11,991 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 01:50:11,992 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-03 01:50:11,992 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551680331]
[2023-04-03 01:50:11,993 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551680331] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-03 01:50:11,993 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-03 01:50:11,993 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22
[2023-04-03 01:50:11,994 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468204254]
[2023-04-03 01:50:11,995 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-03 01:50:11,998 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 22 states
[2023-04-03 01:50:11,999 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-03 01:50:12,033 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2023-04-03 01:50:12,035 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462
[2023-04-03 01:50:12,037 INFO  L87              Difference]: Start difference. First operand  has 46 states, 24 states have (on average 1.25) internal successors, (30), 26 states have internal predecessors, (30), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand  has 22 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 9 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)
[2023-04-03 01:50:13,211 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-03 01:50:13,212 INFO  L93              Difference]: Finished difference Result 106 states and 124 transitions.
[2023-04-03 01:50:13,213 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. 
[2023-04-03 01:50:13,215 INFO  L78                 Accepts]: Start accepts. Automaton has  has 22 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 9 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 37
[2023-04-03 01:50:13,215 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-03 01:50:13,222 INFO  L225             Difference]: With dead ends: 106
[2023-04-03 01:50:13,222 INFO  L226             Difference]: Without dead ends: 73
[2023-04-03 01:50:13,229 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=360, Invalid=1532, Unknown=0, NotChecked=0, Total=1892
[2023-04-03 01:50:13,235 INFO  L413           NwaCegarLoop]: 20 mSDtfsCounter, 286 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2023-04-03 01:50:13,236 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 106 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2023-04-03 01:50:13,250 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 73 states.
[2023-04-03 01:50:13,278 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62.
[2023-04-03 01:50:13,279 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 62 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15)
[2023-04-03 01:50:13,280 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions.
[2023-04-03 01:50:13,281 INFO  L78                 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 37
[2023-04-03 01:50:13,282 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-03 01:50:13,282 INFO  L495      AbstractCegarLoop]: Abstraction has 62 states and 66 transitions.
[2023-04-03 01:50:13,282 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 22 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 9 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)
[2023-04-03 01:50:13,282 INFO  L276                IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions.
[2023-04-03 01:50:13,284 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 40
[2023-04-03 01:50:13,284 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-03 01:50:13,284 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-03 01:50:13,284 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-04-03 01:50:13,284 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-03 01:50:13,285 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-03 01:50:13,285 INFO  L85        PathProgramCache]: Analyzing trace with hash 411031044, now seen corresponding path program 1 times
[2023-04-03 01:50:13,285 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-03 01:50:13,285 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873732398]
[2023-04-03 01:50:13,286 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-03 01:50:13,286 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-03 01:50:13,354 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-03 01:50:13,937 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 01:50:13,937 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-03 01:50:13,938 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873732398]
[2023-04-03 01:50:13,938 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873732398] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-03 01:50:13,938 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-03 01:50:13,938 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11
[2023-04-03 01:50:13,938 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790049427]
[2023-04-03 01:50:13,939 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-03 01:50:13,940 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2023-04-03 01:50:13,940 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-03 01:50:13,941 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2023-04-03 01:50:13,941 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-04-03 01:50:13,941 INFO  L87              Difference]: Start difference. First operand 62 states and 66 transitions. Second operand  has 11 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8)
[2023-04-03 01:50:14,384 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-03 01:50:14,384 INFO  L93              Difference]: Finished difference Result 141 states and 155 transitions.
[2023-04-03 01:50:14,384 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. 
[2023-04-03 01:50:14,385 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 39
[2023-04-03 01:50:14,385 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-03 01:50:14,386 INFO  L225             Difference]: With dead ends: 141
[2023-04-03 01:50:14,386 INFO  L226             Difference]: Without dead ends: 109
[2023-04-03 01:50:14,387 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272
[2023-04-03 01:50:14,388 INFO  L413           NwaCegarLoop]: 28 mSDtfsCounter, 118 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2023-04-03 01:50:14,389 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 106 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2023-04-03 01:50:14,389 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 109 states.
[2023-04-03 01:50:14,410 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 94.
[2023-04-03 01:50:14,410 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 94 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 53 states have internal predecessors, (58), 21 states have call successors, (21), 21 states have call predecessors, (21), 21 states have return successors, (22), 19 states have call predecessors, (22), 20 states have call successors, (22)
[2023-04-03 01:50:14,412 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 101 transitions.
[2023-04-03 01:50:14,412 INFO  L78                 Accepts]: Start accepts. Automaton has 94 states and 101 transitions. Word has length 39
[2023-04-03 01:50:14,412 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-03 01:50:14,412 INFO  L495      AbstractCegarLoop]: Abstraction has 94 states and 101 transitions.
[2023-04-03 01:50:14,412 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8)
[2023-04-03 01:50:14,413 INFO  L276                IsEmpty]: Start isEmpty. Operand 94 states and 101 transitions.
[2023-04-03 01:50:14,413 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 40
[2023-04-03 01:50:14,413 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-03 01:50:14,414 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-03 01:50:14,414 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-04-03 01:50:14,414 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-03 01:50:14,417 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-03 01:50:14,417 INFO  L85        PathProgramCache]: Analyzing trace with hash 1171247061, now seen corresponding path program 1 times
[2023-04-03 01:50:14,418 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-03 01:50:14,418 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490860344]
[2023-04-03 01:50:14,418 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-03 01:50:14,418 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-03 01:50:14,493 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-03 01:50:15,826 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 01:50:15,827 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-03 01:50:15,827 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490860344]
[2023-04-03 01:50:15,827 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490860344] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-03 01:50:15,827 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-03 01:50:15,827 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21
[2023-04-03 01:50:15,827 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923183761]
[2023-04-03 01:50:15,828 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-03 01:50:15,828 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 21 states
[2023-04-03 01:50:15,828 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-03 01:50:15,829 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2023-04-03 01:50:15,829 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420
[2023-04-03 01:50:15,829 INFO  L87              Difference]: Start difference. First operand 94 states and 101 transitions. Second operand  has 21 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 12 states have internal predecessors, (21), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8)
[2023-04-03 01:50:16,604 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-03 01:50:16,605 INFO  L93              Difference]: Finished difference Result 179 states and 194 transitions.
[2023-04-03 01:50:16,605 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. 
[2023-04-03 01:50:16,605 INFO  L78                 Accepts]: Start accepts. Automaton has  has 21 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 12 states have internal predecessors, (21), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 39
[2023-04-03 01:50:16,606 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-03 01:50:16,607 INFO  L225             Difference]: With dead ends: 179
[2023-04-03 01:50:16,607 INFO  L226             Difference]: Without dead ends: 118
[2023-04-03 01:50:16,611 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=261, Invalid=861, Unknown=0, NotChecked=0, Total=1122
[2023-04-03 01:50:16,612 INFO  L413           NwaCegarLoop]: 21 mSDtfsCounter, 193 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2023-04-03 01:50:16,613 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 118 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2023-04-03 01:50:16,613 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 118 states.
[2023-04-03 01:50:16,640 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94.
[2023-04-03 01:50:16,641 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 94 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 53 states have internal predecessors, (57), 21 states have call successors, (21), 21 states have call predecessors, (21), 21 states have return successors, (22), 19 states have call predecessors, (22), 20 states have call successors, (22)
[2023-04-03 01:50:16,645 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions.
[2023-04-03 01:50:16,646 INFO  L78                 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 39
[2023-04-03 01:50:16,646 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-03 01:50:16,646 INFO  L495      AbstractCegarLoop]: Abstraction has 94 states and 100 transitions.
[2023-04-03 01:50:16,647 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 21 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 12 states have internal predecessors, (21), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8)
[2023-04-03 01:50:16,647 INFO  L276                IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions.
[2023-04-03 01:50:16,649 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 41
[2023-04-03 01:50:16,649 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-03 01:50:16,649 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-03 01:50:16,649 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-04-03 01:50:16,649 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-03 01:50:16,651 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-03 01:50:16,651 INFO  L85        PathProgramCache]: Analyzing trace with hash 1880309299, now seen corresponding path program 1 times
[2023-04-03 01:50:16,651 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-03 01:50:16,652 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206919653]
[2023-04-03 01:50:16,652 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-03 01:50:16,652 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-03 01:50:16,674 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-03 01:50:17,307 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 01:50:17,307 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-03 01:50:17,307 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206919653]
[2023-04-03 01:50:17,308 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206919653] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-03 01:50:17,308 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-03 01:50:17,308 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13
[2023-04-03 01:50:17,308 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125626176]
[2023-04-03 01:50:17,308 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-03 01:50:17,309 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 13 states
[2023-04-03 01:50:17,309 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-03 01:50:17,310 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2023-04-03 01:50:17,310 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156
[2023-04-03 01:50:17,310 INFO  L87              Difference]: Start difference. First operand 94 states and 100 transitions. Second operand  has 13 states, 8 states have (on average 2.75) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8)
[2023-04-03 01:50:17,608 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-03 01:50:17,608 INFO  L93              Difference]: Finished difference Result 128 states and 143 transitions.
[2023-04-03 01:50:17,613 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2023-04-03 01:50:17,613 INFO  L78                 Accepts]: Start accepts. Automaton has  has 13 states, 8 states have (on average 2.75) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 40
[2023-04-03 01:50:17,613 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-03 01:50:17,617 INFO  L225             Difference]: With dead ends: 128
[2023-04-03 01:50:17,617 INFO  L226             Difference]: Without dead ends: 126
[2023-04-03 01:50:17,617 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
[2023-04-03 01:50:17,624 INFO  L413           NwaCegarLoop]: 49 mSDtfsCounter, 35 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-04-03 01:50:17,625 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 517 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-04-03 01:50:17,625 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 126 states.
[2023-04-03 01:50:17,664 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 102.
[2023-04-03 01:50:17,665 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 102 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 59 states have internal predecessors, (62), 22 states have call successors, (22), 22 states have call predecessors, (22), 23 states have return successors, (24), 20 states have call predecessors, (24), 21 states have call successors, (24)
[2023-04-03 01:50:17,667 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 108 transitions.
[2023-04-03 01:50:17,667 INFO  L78                 Accepts]: Start accepts. Automaton has 102 states and 108 transitions. Word has length 40
[2023-04-03 01:50:17,668 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-03 01:50:17,669 INFO  L495      AbstractCegarLoop]: Abstraction has 102 states and 108 transitions.
[2023-04-03 01:50:17,669 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 13 states, 8 states have (on average 2.75) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8)
[2023-04-03 01:50:17,669 INFO  L276                IsEmpty]: Start isEmpty. Operand 102 states and 108 transitions.
[2023-04-03 01:50:17,671 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 66
[2023-04-03 01:50:17,671 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-03 01:50:17,671 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-03 01:50:17,672 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-04-03 01:50:17,672 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-03 01:50:17,672 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-03 01:50:17,673 INFO  L85        PathProgramCache]: Analyzing trace with hash 1332897975, now seen corresponding path program 1 times
[2023-04-03 01:50:17,673 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-03 01:50:17,673 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694342127]
[2023-04-03 01:50:17,673 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-03 01:50:17,673 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-03 01:50:17,831 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-03 01:50:24,414 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2023-04-03 01:50:24,415 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-03 01:50:24,415 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694342127]
[2023-04-03 01:50:24,415 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694342127] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-03 01:50:24,415 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259464039]
[2023-04-03 01:50:24,415 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-03 01:50:24,416 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-03 01:50:24,416 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-03 01:50:24,425 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 01:50:24,434 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 01:50:24,621 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-03 01:50:24,629 INFO  L262         TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 148 conjunts are in the unsatisfiable core
[2023-04-03 01:50:24,642 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-03 01:50:46,323 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-03 01:50:46,323 INFO  L327         TraceCheckSpWp]: Computing backward predicates...