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


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


This is Ultimate 0.2.3-dev-f954360
[2023-04-01 12:24:38,656 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-04-01 12:24:38,657 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2023-04-01 12:24:38,694 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2023-04-01 12:24:38,696 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2023-04-01 12:24:38,697 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
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[2023-04-01 12:24:38,702 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
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[2023-04-01 12:24:38,705 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2023-04-01 12:24:38,705 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2023-04-01 12:24:38,706 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2023-04-01 12:24:38,707 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2023-04-01 12:24:38,708 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2023-04-01 12:24:38,709 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
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[2023-04-01 12:24:38,714 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2023-04-01 12:24:38,721 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-04-01 12:24:38,723 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-04-01 12:24:38,724 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf
[2023-04-01 12:24:38,751 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-04-01 12:24:38,751 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-04-01 12:24:38,752 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-04-01 12:24:38,752 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-04-01 12:24:38,752 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-04-01 12:24:38,753 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-04-01 12:24:38,753 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-04-01 12:24:38,753 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-04-01 12:24:38,753 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-04-01 12:24:38,753 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-04-01 12:24:38,754 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-04-01 12:24:38,754 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-04-01 12:24:38,754 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-04-01 12:24:38,754 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-04-01 12:24:38,754 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-04-01 12:24:38,754 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-04-01 12:24:38,754 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-04-01 12:24:38,754 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-04-01 12:24:38,755 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-04-01 12:24:38,755 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-04-01 12:24:38,755 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-04-01 12:24:38,755 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-04-01 12:24:38,755 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-04-01 12:24:38,755 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-04-01 12:24:38,755 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-04-01 12:24:38,756 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-04-01 12:24:38,756 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-04-01 12:24:38,756 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-04-01 12:24:38,756 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-04-01 12:24:38,756 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-04-01 12:24:38,756 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-04-01 12:24:38,756 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-04-01 12:24:38,756 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 12:24:38,757 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-04-01 12:24:38,757 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-04-01 12:24:38,757 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-04-01 12:24:38,757 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-04-01 12:24:38,757 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-04-01 12:24:38,757 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-04-01 12:24:38,757 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-04-01 12:24:38,757 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-04-01 12:24:38,757 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain
[2023-04-01 12:24:38,926 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-04-01 12:24:38,946 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-04-01 12:24:38,947 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-04-01 12:24:38,948 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-04-01 12:24:38,949 INFO  L275        PluginConnector]: CDTParser initialized
[2023-04-01 12:24:38,950 INFO  L432   ainManager$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
[2023-04-01 12:24:39,856 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-04-01 12:24:40,016 INFO  L351              CDTParser]: Found 1 translation units.
[2023-04-01 12:24:40,017 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.4.1.ufo.UNBOUNDED.pals.c
[2023-04-01 12:24:40,028 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1132f2c09/7fadfc1f589248428394c4814bf46cb8/FLAGc96a9fe22
[2023-04-01 12:24:40,036 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1132f2c09/7fadfc1f589248428394c4814bf46cb8
[2023-04-01 12:24:40,038 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-04-01 12:24:40,039 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-04-01 12:24:40,039 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-04-01 12:24:40,040 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-04-01 12:24:40,042 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-04-01 12:24:40,042 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:24:40" (1/1) ...
[2023-04-01 12:24:40,043 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@541662c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:24:40, skipping insertion in model container
[2023-04-01 12:24:40,043 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:24:40" (1/1) ...
[2023-04-01 12:24:40,047 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-04-01 12:24:40,067 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-04-01 12:24:40,205 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]
[2023-04-01 12:24:40,208 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 12:24:40,215 INFO  L203         MainTranslator]: Completed pre-run
[2023-04-01 12:24:40,241 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]
[2023-04-01 12:24:40,242 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 12:24:40,251 INFO  L208         MainTranslator]: Completed translation
[2023-04-01 12:24:40,252 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:24:40 WrapperNode
[2023-04-01 12:24:40,252 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-04-01 12:24:40,265 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-04-01 12:24:40,265 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-04-01 12:24:40,265 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-04-01 12:24:40,273 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:24:40" (1/1) ...
[2023-04-01 12:24:40,273 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:24:40" (1/1) ...
[2023-04-01 12:24:40,282 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:24:40" (1/1) ...
[2023-04-01 12:24:40,282 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:24:40" (1/1) ...
[2023-04-01 12:24:40,288 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:24:40" (1/1) ...
[2023-04-01 12:24:40,293 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:24:40" (1/1) ...
[2023-04-01 12:24:40,294 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:24:40" (1/1) ...
[2023-04-01 12:24:40,295 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:24:40" (1/1) ...
[2023-04-01 12:24:40,297 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-04-01 12:24:40,298 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-04-01 12:24:40,298 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-04-01 12:24:40,298 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-04-01 12:24:40,299 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:24:40" (1/1) ...
[2023-04-01 12:24:40,309 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 12:24:40,318 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 12:24:40,329 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-04-01 12:24:40,336 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-04-01 12:24:40,357 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-04-01 12:24:40,358 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-04-01 12:24:40,358 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-04-01 12:24:40,361 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2023-04-01 12:24:40,362 INFO  L138     BoogieDeclarations]: Found implementation of procedure node1
[2023-04-01 12:24:40,362 INFO  L138     BoogieDeclarations]: Found implementation of procedure node2
[2023-04-01 12:24:40,362 INFO  L138     BoogieDeclarations]: Found implementation of procedure node3
[2023-04-01 12:24:40,362 INFO  L138     BoogieDeclarations]: Found implementation of procedure node4
[2023-04-01 12:24:40,362 INFO  L138     BoogieDeclarations]: Found implementation of procedure init
[2023-04-01 12:24:40,362 INFO  L138     BoogieDeclarations]: Found implementation of procedure check
[2023-04-01 12:24:40,362 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-04-01 12:24:40,362 INFO  L138     BoogieDeclarations]: Found implementation of procedure assert
[2023-04-01 12:24:40,363 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-04-01 12:24:40,363 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-04-01 12:24:40,363 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-04-01 12:24:40,363 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-04-01 12:24:40,363 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2023-04-01 12:24:40,363 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2023-04-01 12:24:40,363 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar
[2023-04-01 12:24:40,363 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2023-04-01 12:24:40,363 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2023-04-01 12:24:40,363 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2023-04-01 12:24:40,364 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2023-04-01 12:24:40,364 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2023-04-01 12:24:40,364 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2023-04-01 12:24:40,364 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2023-04-01 12:24:40,364 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2023-04-01 12:24:40,364 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2023-04-01 12:24:40,364 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2023-04-01 12:24:40,364 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-04-01 12:24:40,364 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-04-01 12:24:40,365 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-04-01 12:24:40,365 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-04-01 12:24:40,365 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-04-01 12:24:40,365 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-04-01 12:24:40,365 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-04-01 12:24:40,459 INFO  L236             CfgBuilder]: Building ICFG
[2023-04-01 12:24:40,460 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-04-01 12:24:40,833 INFO  L277             CfgBuilder]: Performing block encoding
[2023-04-01 12:24:41,045 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-04-01 12:24:41,046 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-04-01 12:24:41,048 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:24:41 BoogieIcfgContainer
[2023-04-01 12:24:41,048 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-04-01 12:24:41,049 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-04-01 12:24:41,049 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-04-01 12:24:41,051 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-04-01 12:24:41,051 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:24:40" (1/3) ...
[2023-04-01 12:24:41,052 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f315e73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:24:41, skipping insertion in model container
[2023-04-01 12:24:41,052 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:24:40" (2/3) ...
[2023-04-01 12:24:41,052 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f315e73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:24:41, skipping insertion in model container
[2023-04-01 12:24:41,052 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:24:41" (3/3) ...
[2023-04-01 12:24:41,055 INFO  L112   eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.UNBOUNDED.pals.c
[2023-04-01 12:24:41,066 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-04-01 12:24:41,066 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-04-01 12:24:41,103 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-04-01 12:24:41,108 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;@18d49f4c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-04-01 12:24:41,108 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-04-01 12:24:41,111 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)
[2023-04-01 12:24:41,117 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 38
[2023-04-01 12:24:41,118 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 12:24:41,119 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]
[2023-04-01 12:24:41,119 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 12:24:41,124 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 12:24:41,124 INFO  L85        PathProgramCache]: Analyzing trace with hash -1995882099, now seen corresponding path program 1 times
[2023-04-01 12:24:41,130 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 12:24:41,131 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071052815]
[2023-04-01 12:24:41,131 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 12:24:41,131 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 12:24:41,365 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 12:24:43,191 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 12:24:43,192 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 12:24:43,192 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071052815]
[2023-04-01 12:24:43,193 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071052815] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 12:24:43,193 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 12:24:43,193 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22
[2023-04-01 12:24:43,194 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046220664]
[2023-04-01 12:24:43,194 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 12:24:43,197 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 22 states
[2023-04-01 12:24:43,197 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 12:24:43,226 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2023-04-01 12:24:43,228 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462
[2023-04-01 12:24:43,230 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)
[2023-04-01 12:24:44,146 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 12:24:44,146 INFO  L93              Difference]: Finished difference Result 106 states and 124 transitions.
[2023-04-01 12:24:44,147 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. 
[2023-04-01 12:24:44,148 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
[2023-04-01 12:24:44,148 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 12:24:44,153 INFO  L225             Difference]: With dead ends: 106
[2023-04-01 12:24:44,153 INFO  L226             Difference]: Without dead ends: 73
[2023-04-01 12:24:44,156 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=360, Invalid=1532, Unknown=0, NotChecked=0, Total=1892
[2023-04-01 12:24:44,158 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, 0.4s IncrementalHoareTripleChecker+Time
[2023-04-01 12:24:44,158 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 106 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2023-04-01 12:24:44,169 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 73 states.
[2023-04-01 12:24:44,188 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62.
[2023-04-01 12:24:44,189 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)
[2023-04-01 12:24:44,189 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions.
[2023-04-01 12:24:44,190 INFO  L78                 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 37
[2023-04-01 12:24:44,191 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 12:24:44,191 INFO  L495      AbstractCegarLoop]: Abstraction has 62 states and 66 transitions.
[2023-04-01 12:24:44,191 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)
[2023-04-01 12:24:44,191 INFO  L276                IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions.
[2023-04-01 12:24:44,192 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 40
[2023-04-01 12:24:44,192 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 12:24:44,192 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]
[2023-04-01 12:24:44,192 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-04-01 12:24:44,193 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 12:24:44,193 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 12:24:44,193 INFO  L85        PathProgramCache]: Analyzing trace with hash 411031044, now seen corresponding path program 1 times
[2023-04-01 12:24:44,193 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 12:24:44,193 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238211623]
[2023-04-01 12:24:44,193 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 12:24:44,194 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 12:24:44,258 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 12:24:44,728 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 12:24:44,728 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 12:24:44,728 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238211623]
[2023-04-01 12:24:44,728 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238211623] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 12:24:44,729 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 12:24:44,729 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11
[2023-04-01 12:24:44,729 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532272317]
[2023-04-01 12:24:44,729 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 12:24:44,731 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2023-04-01 12:24:44,732 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 12:24:44,733 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2023-04-01 12:24:44,737 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-04-01 12:24:44,737 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)
[2023-04-01 12:24:45,098 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 12:24:45,098 INFO  L93              Difference]: Finished difference Result 141 states and 155 transitions.
[2023-04-01 12:24:45,098 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. 
[2023-04-01 12:24:45,098 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
[2023-04-01 12:24:45,099 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 12:24:45,100 INFO  L225             Difference]: With dead ends: 141
[2023-04-01 12:24:45,100 INFO  L226             Difference]: Without dead ends: 109
[2023-04-01 12:24:45,100 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272
[2023-04-01 12:24:45,101 INFO  L413           NwaCegarLoop]: 28 mSDtfsCounter, 118 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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
[2023-04-01 12:24:45,101 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]
[2023-04-01 12:24:45,102 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 109 states.
[2023-04-01 12:24:45,119 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 94.
[2023-04-01 12:24:45,120 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)
[2023-04-01 12:24:45,126 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 101 transitions.
[2023-04-01 12:24:45,126 INFO  L78                 Accepts]: Start accepts. Automaton has 94 states and 101 transitions. Word has length 39
[2023-04-01 12:24:45,126 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 12:24:45,126 INFO  L495      AbstractCegarLoop]: Abstraction has 94 states and 101 transitions.
[2023-04-01 12:24:45,126 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)
[2023-04-01 12:24:45,127 INFO  L276                IsEmpty]: Start isEmpty. Operand 94 states and 101 transitions.
[2023-04-01 12:24:45,128 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 40
[2023-04-01 12:24:45,128 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 12:24:45,129 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]
[2023-04-01 12:24:45,129 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-04-01 12:24:45,129 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 12:24:45,129 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 12:24:45,129 INFO  L85        PathProgramCache]: Analyzing trace with hash 1171247061, now seen corresponding path program 1 times
[2023-04-01 12:24:45,129 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 12:24:45,129 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786127869]
[2023-04-01 12:24:45,130 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 12:24:45,130 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 12:24:45,188 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 12:24:46,207 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 12:24:46,207 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 12:24:46,208 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786127869]
[2023-04-01 12:24:46,208 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786127869] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 12:24:46,208 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 12:24:46,208 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21
[2023-04-01 12:24:46,208 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201884805]
[2023-04-01 12:24:46,208 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 12:24:46,208 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 21 states
[2023-04-01 12:24:46,209 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 12:24:46,209 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2023-04-01 12:24:46,209 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420
[2023-04-01 12:24:46,209 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)
[2023-04-01 12:24:46,822 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 12:24:46,823 INFO  L93              Difference]: Finished difference Result 179 states and 194 transitions.
[2023-04-01 12:24:46,823 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. 
[2023-04-01 12:24:46,823 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
[2023-04-01 12:24:46,824 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 12:24:46,825 INFO  L225             Difference]: With dead ends: 179
[2023-04-01 12:24:46,825 INFO  L226             Difference]: Without dead ends: 118
[2023-04-01 12:24:46,825 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=261, Invalid=861, Unknown=0, NotChecked=0, Total=1122
[2023-04-01 12:24:46,826 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, 0.3s IncrementalHoareTripleChecker+Time
[2023-04-01 12:24:46,827 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 118 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2023-04-01 12:24:46,827 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 118 states.
[2023-04-01 12:24:46,857 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94.
[2023-04-01 12:24:46,859 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)
[2023-04-01 12:24:46,860 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions.
[2023-04-01 12:24:46,860 INFO  L78                 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 39
[2023-04-01 12:24:46,860 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 12:24:46,861 INFO  L495      AbstractCegarLoop]: Abstraction has 94 states and 100 transitions.
[2023-04-01 12:24:46,861 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)
[2023-04-01 12:24:46,862 INFO  L276                IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions.
[2023-04-01 12:24:46,862 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 41
[2023-04-01 12:24:46,863 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 12:24:46,863 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 12:24:46,863 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-04-01 12:24:46,863 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 12:24:46,863 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 12:24:46,863 INFO  L85        PathProgramCache]: Analyzing trace with hash 1880309299, now seen corresponding path program 1 times
[2023-04-01 12:24:46,863 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 12:24:46,864 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224929675]
[2023-04-01 12:24:46,864 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 12:24:46,864 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 12:24:46,882 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 12:24:47,353 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 12:24:47,354 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 12:24:47,354 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224929675]
[2023-04-01 12:24:47,354 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224929675] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 12:24:47,354 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 12:24:47,354 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13
[2023-04-01 12:24:47,354 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807540221]
[2023-04-01 12:24:47,354 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 12:24:47,355 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 13 states
[2023-04-01 12:24:47,355 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 12:24:47,356 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2023-04-01 12:24:47,356 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156
[2023-04-01 12:24:47,356 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)
[2023-04-01 12:24:47,578 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 12:24:47,578 INFO  L93              Difference]: Finished difference Result 128 states and 143 transitions.
[2023-04-01 12:24:47,578 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2023-04-01 12:24:47,579 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
[2023-04-01 12:24:47,579 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 12:24:47,582 INFO  L225             Difference]: With dead ends: 128
[2023-04-01 12:24:47,582 INFO  L226             Difference]: Without dead ends: 126
[2023-04-01 12:24:47,583 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462
[2023-04-01 12:24:47,589 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
[2023-04-01 12:24:47,590 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]
[2023-04-01 12:24:47,593 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 126 states.
[2023-04-01 12:24:47,618 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 102.
[2023-04-01 12:24:47,619 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)
[2023-04-01 12:24:47,620 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 108 transitions.
[2023-04-01 12:24:47,620 INFO  L78                 Accepts]: Start accepts. Automaton has 102 states and 108 transitions. Word has length 40
[2023-04-01 12:24:47,621 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 12:24:47,621 INFO  L495      AbstractCegarLoop]: Abstraction has 102 states and 108 transitions.
[2023-04-01 12:24:47,621 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)
[2023-04-01 12:24:47,621 INFO  L276                IsEmpty]: Start isEmpty. Operand 102 states and 108 transitions.
[2023-04-01 12:24:47,623 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 66
[2023-04-01 12:24:47,623 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 12:24:47,623 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]
[2023-04-01 12:24:47,623 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-04-01 12:24:47,624 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 12:24:47,624 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 12:24:47,624 INFO  L85        PathProgramCache]: Analyzing trace with hash 1332897975, now seen corresponding path program 1 times
[2023-04-01 12:24:47,624 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 12:24:47,625 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892729363]
[2023-04-01 12:24:47,625 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 12:24:47,625 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 12:24:47,761 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 12:24:52,781 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2023-04-01 12:24:52,781 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 12:24:52,781 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892729363]
[2023-04-01 12:24:52,781 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892729363] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-01 12:24:52,781 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685456755]
[2023-04-01 12:24:52,782 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 12:24:52,782 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 12:24:52,782 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 12:24:52,784 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-04-01 12:24:52,785 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-04-01 12:24:52,940 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 12:24:52,947 INFO  L262         TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 148 conjunts are in the unsatisfiable core
[2023-04-01 12:24:52,957 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-01 12:25:11,711 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 12:25:11,711 INFO  L327         TraceCheckSpWp]: Computing backward predicates...