/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.6_overflow.ufo.UNBOUNDED.pals.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-04-01 12:25:29,409 INFO  L177        SettingsManager]: Resetting all preferences to default values...
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[2023-04-01 12:25:29,430 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2023-04-01 12:25:29,433 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2023-04-01 12:25:29,433 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
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[2023-04-01 12:25:29,436 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
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[2023-04-01 12:25:29,438 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
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[2023-04-01 12:25:29,460 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-04-01 12:25:29,461 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-04-01 12:25:29,462 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf
[2023-04-01 12:25:29,479 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-04-01 12:25:29,479 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-04-01 12:25:29,479 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-04-01 12:25:29,480 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-04-01 12:25:29,480 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-04-01 12:25:29,480 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-04-01 12:25:29,480 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-04-01 12:25:29,480 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-04-01 12:25:29,481 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-04-01 12:25:29,481 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-04-01 12:25:29,481 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-04-01 12:25:29,481 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-04-01 12:25:29,481 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-04-01 12:25:29,481 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-04-01 12:25:29,481 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-04-01 12:25:29,481 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-04-01 12:25:29,482 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-04-01 12:25:29,482 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-04-01 12:25:29,482 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-04-01 12:25:29,482 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-04-01 12:25:29,482 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-04-01 12:25:29,482 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-04-01 12:25:29,482 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-04-01 12:25:29,483 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-04-01 12:25:29,483 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-04-01 12:25:29,483 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-04-01 12:25:29,483 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-04-01 12:25:29,483 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-04-01 12:25:29,483 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-04-01 12:25:29,483 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-04-01 12:25:29,483 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-04-01 12:25:29,483 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-04-01 12:25:29,484 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 12:25:29,484 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-04-01 12:25:29,485 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-04-01 12:25:29,485 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-04-01 12:25:29,485 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-04-01 12:25:29,485 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-04-01 12:25:29,485 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-04-01 12:25:29,485 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-04-01 12:25:29,485 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-04-01 12:25:29,485 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain
[2023-04-01 12:25:29,654 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-04-01 12:25:29,668 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-04-01 12:25:29,670 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-04-01 12:25:29,670 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-04-01 12:25:29,671 INFO  L275        PluginConnector]: CDTParser initialized
[2023-04-01 12:25:29,672 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.6_overflow.ufo.UNBOUNDED.pals.c
[2023-04-01 12:25:30,635 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-04-01 12:25:30,759 INFO  L351              CDTParser]: Found 1 translation units.
[2023-04-01 12:25:30,760 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.6_overflow.ufo.UNBOUNDED.pals.c
[2023-04-01 12:25:30,775 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e211b7b88/a1667c8858f142c98048930026096bfa/FLAGcfd348447
[2023-04-01 12:25:30,785 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e211b7b88/a1667c8858f142c98048930026096bfa
[2023-04-01 12:25:30,786 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-04-01 12:25:30,787 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-04-01 12:25:30,788 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-04-01 12:25:30,788 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-04-01 12:25:30,790 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-04-01 12:25:30,791 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:25:30" (1/1) ...
[2023-04-01 12:25:30,791 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c4e2631 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:30, skipping insertion in model container
[2023-04-01 12:25:30,791 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:25:30" (1/1) ...
[2023-04-01 12:25:30,795 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-04-01 12:25:30,823 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-04-01 12:25:30,963 WARN  L247   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.6_overflow.ufo.UNBOUNDED.pals.c[15177,15190]
[2023-04-01 12:25:30,965 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 12:25:30,973 INFO  L203         MainTranslator]: Completed pre-run
[2023-04-01 12:25:31,005 WARN  L247   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.6_overflow.ufo.UNBOUNDED.pals.c[15177,15190]
[2023-04-01 12:25:31,006 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 12:25:31,017 INFO  L208         MainTranslator]: Completed translation
[2023-04-01 12:25:31,017 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:31 WrapperNode
[2023-04-01 12:25:31,025 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-04-01 12:25:31,025 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-04-01 12:25:31,025 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-04-01 12:25:31,025 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-04-01 12:25:31,033 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:31" (1/1) ...
[2023-04-01 12:25:31,036 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:31" (1/1) ...
[2023-04-01 12:25:31,042 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:31" (1/1) ...
[2023-04-01 12:25:31,042 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:31" (1/1) ...
[2023-04-01 12:25:31,049 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:31" (1/1) ...
[2023-04-01 12:25:31,055 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:31" (1/1) ...
[2023-04-01 12:25:31,057 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:31" (1/1) ...
[2023-04-01 12:25:31,058 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:31" (1/1) ...
[2023-04-01 12:25:31,061 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-04-01 12:25:31,062 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-04-01 12:25:31,062 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-04-01 12:25:31,062 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-04-01 12:25:31,062 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:31" (1/1) ...
[2023-04-01 12:25:31,071 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 12:25:31,078 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 12:25:31,087 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-04-01 12:25:31,088 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-04-01 12:25:31,110 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-04-01 12:25:31,110 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-04-01 12:25:31,110 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-04-01 12:25:31,110 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2023-04-01 12:25:31,110 INFO  L138     BoogieDeclarations]: Found implementation of procedure node1
[2023-04-01 12:25:31,110 INFO  L138     BoogieDeclarations]: Found implementation of procedure node2
[2023-04-01 12:25:31,110 INFO  L138     BoogieDeclarations]: Found implementation of procedure node3
[2023-04-01 12:25:31,110 INFO  L138     BoogieDeclarations]: Found implementation of procedure node4
[2023-04-01 12:25:31,110 INFO  L138     BoogieDeclarations]: Found implementation of procedure node5
[2023-04-01 12:25:31,110 INFO  L138     BoogieDeclarations]: Found implementation of procedure node6
[2023-04-01 12:25:31,111 INFO  L138     BoogieDeclarations]: Found implementation of procedure init
[2023-04-01 12:25:31,111 INFO  L138     BoogieDeclarations]: Found implementation of procedure check
[2023-04-01 12:25:31,111 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-04-01 12:25:31,111 INFO  L138     BoogieDeclarations]: Found implementation of procedure assert
[2023-04-01 12:25:31,111 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-04-01 12:25:31,111 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-04-01 12:25:31,111 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-04-01 12:25:31,111 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-04-01 12:25:31,111 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2023-04-01 12:25:31,111 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2023-04-01 12:25:31,111 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar
[2023-04-01 12:25:31,111 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2023-04-01 12:25:31,112 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2023-04-01 12:25:31,112 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2023-04-01 12:25:31,112 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2023-04-01 12:25:31,112 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2023-04-01 12:25:31,112 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2023-04-01 12:25:31,112 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2023-04-01 12:25:31,112 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2023-04-01 12:25:31,112 INFO  L130     BoogieDeclarations]: Found specification of procedure node5
[2023-04-01 12:25:31,112 INFO  L130     BoogieDeclarations]: Found specification of procedure node6
[2023-04-01 12:25:31,112 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2023-04-01 12:25:31,112 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2023-04-01 12:25:31,112 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-04-01 12:25:31,112 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-04-01 12:25:31,112 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-04-01 12:25:31,113 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-04-01 12:25:31,113 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-04-01 12:25:31,113 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-04-01 12:25:31,113 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-04-01 12:25:31,225 INFO  L236             CfgBuilder]: Building ICFG
[2023-04-01 12:25:31,227 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-04-01 12:25:31,703 INFO  L277             CfgBuilder]: Performing block encoding
[2023-04-01 12:25:32,030 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-04-01 12:25:32,031 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-04-01 12:25:32,034 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:25:32 BoogieIcfgContainer
[2023-04-01 12:25:32,034 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-04-01 12:25:32,037 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-04-01 12:25:32,037 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-04-01 12:25:32,039 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-04-01 12:25:32,039 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:25:30" (1/3) ...
[2023-04-01 12:25:32,040 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@107f339c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:25:32, skipping insertion in model container
[2023-04-01 12:25:32,040 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:31" (2/3) ...
[2023-04-01 12:25:32,040 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@107f339c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:25:32, skipping insertion in model container
[2023-04-01 12:25:32,040 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:25:32" (3/3) ...
[2023-04-01 12:25:32,041 INFO  L112   eAbstractionObserver]: Analyzing ICFG pals_lcr.6_overflow.ufo.UNBOUNDED.pals.c
[2023-04-01 12:25:32,053 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-04-01 12:25:32,053 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-04-01 12:25:32,095 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-04-01 12:25:32,102 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;@102c03d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-04-01 12:25:32,102 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-04-01 12:25:32,107 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 52 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 12 states have call successors, (12), 12 states have call predecessors, (12), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12)
[2023-04-01 12:25:32,112 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 44
[2023-04-01 12:25:32,112 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 12:25:32,113 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 12:25:32,114 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 12:25:32,118 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 12:25:32,119 INFO  L85        PathProgramCache]: Analyzing trace with hash 1203541051, now seen corresponding path program 1 times
[2023-04-01 12:25:32,125 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 12:25:32,125 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698005653]
[2023-04-01 12:25:32,126 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 12:25:32,126 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 12:25:32,380 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 12:25:35,456 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 12:25:35,457 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 12:25:35,457 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698005653]
[2023-04-01 12:25:35,458 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698005653] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 12:25:35,458 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 12:25:35,458 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28
[2023-04-01 12:25:35,459 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5628367]
[2023-04-01 12:25:35,459 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 12:25:35,463 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 28 states
[2023-04-01 12:25:35,463 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 12:25:35,499 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants.
[2023-04-01 12:25:35,501 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756
[2023-04-01 12:25:35,503 INFO  L87              Difference]: Start difference. First operand  has 52 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 12 states have call successors, (12), 12 states have call predecessors, (12), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand  has 28 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 11 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2023-04-01 12:25:36,848 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 12:25:36,848 INFO  L93              Difference]: Finished difference Result 124 states and 142 transitions.
[2023-04-01 12:25:36,850 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. 
[2023-04-01 12:25:36,851 INFO  L78                 Accepts]: Start accepts. Automaton has  has 28 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 11 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 43
[2023-04-01 12:25:36,851 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 12:25:36,856 INFO  L225             Difference]: With dead ends: 124
[2023-04-01 12:25:36,856 INFO  L226             Difference]: Without dead ends: 85
[2023-04-01 12:25:36,859 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=543, Invalid=2319, Unknown=0, NotChecked=0, Total=2862
[2023-04-01 12:25:36,862 INFO  L413           NwaCegarLoop]: 22 mSDtfsCounter, 357 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2023-04-01 12:25:36,862 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 128 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2023-04-01 12:25:36,897 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 85 states.
[2023-04-01 12:25:36,922 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74.
[2023-04-01 12:25:36,923 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 74 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 37 states have internal predecessors, (40), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19)
[2023-04-01 12:25:36,924 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions.
[2023-04-01 12:25:36,925 INFO  L78                 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 43
[2023-04-01 12:25:36,926 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 12:25:36,926 INFO  L495      AbstractCegarLoop]: Abstraction has 74 states and 78 transitions.
[2023-04-01 12:25:36,926 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 28 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 11 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2023-04-01 12:25:36,926 INFO  L276                IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions.
[2023-04-01 12:25:36,927 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 46
[2023-04-01 12:25:36,927 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 12:25:36,928 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 12:25:36,928 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-04-01 12:25:36,928 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 12:25:36,928 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 12:25:36,929 INFO  L85        PathProgramCache]: Analyzing trace with hash -373529861, now seen corresponding path program 1 times
[2023-04-01 12:25:36,929 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 12:25:36,929 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509458061]
[2023-04-01 12:25:36,929 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 12:25:36,929 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 12:25:37,008 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 12:25:37,360 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 12:25:37,360 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 12:25:37,361 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509458061]
[2023-04-01 12:25:37,361 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509458061] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 12:25:37,361 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 12:25:37,361 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11
[2023-04-01 12:25:37,361 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722855579]
[2023-04-01 12:25:37,361 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 12:25:37,362 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2023-04-01 12:25:37,362 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 12:25:37,363 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2023-04-01 12:25:37,363 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110
[2023-04-01 12:25:37,363 INFO  L87              Difference]: Start difference. First operand 74 states and 78 transitions. Second operand  has 11 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10)
[2023-04-01 12:25:37,668 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 12:25:37,668 INFO  L93              Difference]: Finished difference Result 142 states and 153 transitions.
[2023-04-01 12:25:37,668 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. 
[2023-04-01 12:25:37,669 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 45
[2023-04-01 12:25:37,669 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 12:25:37,671 INFO  L225             Difference]: With dead ends: 142
[2023-04-01 12:25:37,671 INFO  L226             Difference]: Without dead ends: 104
[2023-04-01 12:25:37,671 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272
[2023-04-01 12:25:37,672 INFO  L413           NwaCegarLoop]: 24 mSDtfsCounter, 78 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-04-01 12:25:37,672 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 99 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-04-01 12:25:37,673 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 104 states.
[2023-04-01 12:25:37,689 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 77.
[2023-04-01 12:25:37,689 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 77 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 40 states have internal predecessors, (44), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18)
[2023-04-01 12:25:37,690 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions.
[2023-04-01 12:25:37,690 INFO  L78                 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 45
[2023-04-01 12:25:37,690 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 12:25:37,691 INFO  L495      AbstractCegarLoop]: Abstraction has 77 states and 81 transitions.
[2023-04-01 12:25:37,691 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10)
[2023-04-01 12:25:37,691 INFO  L276                IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions.
[2023-04-01 12:25:37,691 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 46
[2023-04-01 12:25:37,692 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 12:25:37,692 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 12:25:37,692 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-04-01 12:25:37,692 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 12:25:37,692 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 12:25:37,692 INFO  L85        PathProgramCache]: Analyzing trace with hash -1107890013, now seen corresponding path program 1 times
[2023-04-01 12:25:37,692 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 12:25:37,693 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873899253]
[2023-04-01 12:25:37,693 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 12:25:37,693 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 12:25:37,729 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 12:25:39,592 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 12:25:39,592 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 12:25:39,592 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873899253]
[2023-04-01 12:25:39,593 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873899253] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 12:25:39,593 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 12:25:39,593 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28
[2023-04-01 12:25:39,593 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860217741]
[2023-04-01 12:25:39,593 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 12:25:39,593 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 28 states
[2023-04-01 12:25:39,594 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 12:25:39,594 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants.
[2023-04-01 12:25:39,594 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756
[2023-04-01 12:25:39,595 INFO  L87              Difference]: Start difference. First operand 77 states and 81 transitions. Second operand  has 28 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 11 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2023-04-01 12:25:40,749 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 12:25:40,750 INFO  L93              Difference]: Finished difference Result 153 states and 163 transitions.
[2023-04-01 12:25:40,750 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. 
[2023-04-01 12:25:40,750 INFO  L78                 Accepts]: Start accepts. Automaton has  has 28 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 11 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 45
[2023-04-01 12:25:40,751 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 12:25:40,752 INFO  L225             Difference]: With dead ends: 153
[2023-04-01 12:25:40,752 INFO  L226             Difference]: Without dead ends: 115
[2023-04-01 12:25:40,753 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=459, Invalid=1991, Unknown=0, NotChecked=0, Total=2450
[2023-04-01 12:25:40,754 INFO  L413           NwaCegarLoop]: 22 mSDtfsCounter, 502 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2023-04-01 12:25:40,754 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [512 Valid, 120 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2023-04-01 12:25:40,754 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 115 states.
[2023-04-01 12:25:40,770 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 77.
[2023-04-01 12:25:40,771 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 77 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 40 states have internal predecessors, (43), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18)
[2023-04-01 12:25:40,771 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions.
[2023-04-01 12:25:40,772 INFO  L78                 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 45
[2023-04-01 12:25:40,772 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 12:25:40,772 INFO  L495      AbstractCegarLoop]: Abstraction has 77 states and 80 transitions.
[2023-04-01 12:25:40,772 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 28 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 11 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2023-04-01 12:25:40,772 INFO  L276                IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions.
[2023-04-01 12:25:40,773 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 47
[2023-04-01 12:25:40,773 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 12:25:40,773 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 12:25:40,773 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-04-01 12:25:40,773 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 12:25:40,773 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 12:25:40,774 INFO  L85        PathProgramCache]: Analyzing trace with hash -626159269, now seen corresponding path program 1 times
[2023-04-01 12:25:40,774 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 12:25:40,774 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129812717]
[2023-04-01 12:25:40,774 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 12:25:40,774 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 12:25:40,796 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 12:25:41,629 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 12:25:41,629 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 12:25:41,629 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129812717]
[2023-04-01 12:25:41,629 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129812717] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 12:25:41,630 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 12:25:41,630 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13
[2023-04-01 12:25:41,630 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289037094]
[2023-04-01 12:25:41,630 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 12:25:41,630 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 13 states
[2023-04-01 12:25:41,630 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 12:25:41,631 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2023-04-01 12:25:41,631 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156
[2023-04-01 12:25:41,631 INFO  L87              Difference]: Start difference. First operand 77 states and 80 transitions. Second operand  has 13 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10)
[2023-04-01 12:25:41,874 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 12:25:41,875 INFO  L93              Difference]: Finished difference Result 113 states and 126 transitions.
[2023-04-01 12:25:41,875 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2023-04-01 12:25:41,875 INFO  L78                 Accepts]: Start accepts. Automaton has  has 13 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 46
[2023-04-01 12:25:41,875 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 12:25:41,876 INFO  L225             Difference]: With dead ends: 113
[2023-04-01 12:25:41,876 INFO  L226             Difference]: Without dead ends: 111
[2023-04-01 12:25:41,876 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462
[2023-04-01 12:25:41,877 INFO  L413           NwaCegarLoop]: 57 mSDtfsCounter, 35 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-04-01 12:25:41,878 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 607 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-04-01 12:25:41,878 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 111 states.
[2023-04-01 12:25:41,900 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 86.
[2023-04-01 12:25:41,901 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 86 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 47 states have internal predecessors, (49), 20 states have call successors, (20), 20 states have call predecessors, (20), 20 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20)
[2023-04-01 12:25:41,906 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions.
[2023-04-01 12:25:41,906 INFO  L78                 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 46
[2023-04-01 12:25:41,906 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 12:25:41,907 INFO  L495      AbstractCegarLoop]: Abstraction has 86 states and 89 transitions.
[2023-04-01 12:25:41,907 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 13 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10)
[2023-04-01 12:25:41,907 INFO  L276                IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions.
[2023-04-01 12:25:41,912 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 78
[2023-04-01 12:25:41,912 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 12:25:41,912 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 12:25:41,912 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-04-01 12:25:41,912 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 12:25:41,913 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 12:25:41,913 INFO  L85        PathProgramCache]: Analyzing trace with hash -2063318834, now seen corresponding path program 1 times
[2023-04-01 12:25:41,913 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 12:25:41,913 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679284218]
[2023-04-01 12:25:41,913 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 12:25:41,913 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 12:25:42,129 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 12:25:58,669 INFO  L134       CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2023-04-01 12:25:58,669 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 12:25:58,669 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679284218]
[2023-04-01 12:25:58,670 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679284218] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-01 12:25:58,670 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101582645]
[2023-04-01 12:25:58,670 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 12:25:58,670 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 12:25:58,670 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 12:25:58,672 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 12:25:58,673 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 12:25:58,931 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 12:25:58,941 INFO  L262         TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 215 conjunts are in the unsatisfiable core
[2023-04-01 12:25:58,954 INFO  L285         TraceCheckSpWp]: Computing forward predicates...