/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 IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem17_label18.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-03-31 22:21:08,072 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-03-31 22:21:08,075 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2023-03-31 22:21:08,108 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2023-03-31 22:21:08,111 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2023-03-31 22:21:08,113 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2023-03-31 22:21:08,115 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
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[2023-03-31 22:21:08,117 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2023-03-31 22:21:08,117 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2023-03-31 22:21:08,118 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2023-03-31 22:21:08,119 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
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[2023-03-31 22:21:08,120 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2023-03-31 22:21:08,121 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2023-03-31 22:21:08,122 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2023-03-31 22:21:08,122 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2023-03-31 22:21:08,124 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2023-03-31 22:21:08,125 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
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[2023-03-31 22:21:08,131 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2023-03-31 22:21:08,134 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2023-03-31 22:21:08,137 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
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[2023-03-31 22:21:08,138 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
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[2023-03-31 22:21:08,146 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-03-31 22:21:08,149 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-03-31 22:21:08,150 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
[2023-03-31 22:21:08,181 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-03-31 22:21:08,181 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-03-31 22:21:08,182 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-03-31 22:21:08,182 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-03-31 22:21:08,182 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-03-31 22:21:08,183 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-03-31 22:21:08,183 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-03-31 22:21:08,183 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-03-31 22:21:08,183 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-03-31 22:21:08,183 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-03-31 22:21:08,183 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-03-31 22:21:08,183 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-03-31 22:21:08,183 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-03-31 22:21:08,184 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-03-31 22:21:08,184 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-03-31 22:21:08,184 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-03-31 22:21:08,184 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-03-31 22:21:08,184 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-03-31 22:21:08,185 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-03-31 22:21:08,185 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-03-31 22:21:08,185 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-03-31 22:21:08,185 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-03-31 22:21:08,185 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-03-31 22:21:08,185 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-03-31 22:21:08,186 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-03-31 22:21:08,186 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-03-31 22:21:08,186 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-03-31 22:21:08,186 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-03-31 22:21:08,186 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-03-31 22:21:08,187 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-03-31 22:21:08,187 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-03-31 22:21:08,187 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-03-31 22:21:08,187 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-03-31 22:21:08,187 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-03-31 22:21:08,187 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-03-31 22:21:08,187 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-03-31 22:21:08,188 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-03-31 22:21:08,188 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-03-31 22:21:08,188 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-03-31 22:21:08,188 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-03-31 22:21:08,188 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-03-31 22:21:08,188 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain
[2023-03-31 22:21:08,414 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-03-31 22:21:08,442 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-03-31 22:21:08,445 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-03-31 22:21:08,446 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-03-31 22:21:08,446 INFO  L275        PluginConnector]: CDTParser initialized
[2023-03-31 22:21:08,447 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label18.c
[2023-03-31 22:21:09,646 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-03-31 22:21:10,028 INFO  L351              CDTParser]: Found 1 translation units.
[2023-03-31 22:21:10,029 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label18.c
[2023-03-31 22:21:10,050 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c2e9e3d5/242e8bd3487148359b457c1e696294e5/FLAG0a05e7458
[2023-03-31 22:21:10,260 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c2e9e3d5/242e8bd3487148359b457c1e696294e5
[2023-03-31 22:21:10,262 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-03-31 22:21:10,264 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-03-31 22:21:10,266 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-03-31 22:21:10,266 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-03-31 22:21:10,269 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-03-31 22:21:10,270 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:21:10" (1/1) ...
[2023-03-31 22:21:10,271 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2130de96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:21:10, skipping insertion in model container
[2023-03-31 22:21:10,271 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:21:10" (1/1) ...
[2023-03-31 22:21:10,277 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-03-31 22:21:10,371 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-03-31 22:21:10,635 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/eca-rers2012/Problem17_label18.c[8129,8142]
[2023-03-31 22:21:11,079 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-03-31 22:21:11,089 INFO  L203         MainTranslator]: Completed pre-run
[2023-03-31 22:21:11,115 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/eca-rers2012/Problem17_label18.c[8129,8142]
[2023-03-31 22:21:11,369 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-03-31 22:21:11,384 INFO  L208         MainTranslator]: Completed translation
[2023-03-31 22:21:11,385 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:21:11 WrapperNode
[2023-03-31 22:21:11,385 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-03-31 22:21:11,386 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-03-31 22:21:11,386 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-03-31 22:21:11,386 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-03-31 22:21:11,396 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:21:11" (1/1) ...
[2023-03-31 22:21:11,397 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:21:11" (1/1) ...
[2023-03-31 22:21:11,437 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:21:11" (1/1) ...
[2023-03-31 22:21:11,438 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:21:11" (1/1) ...
[2023-03-31 22:21:11,508 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:21:11" (1/1) ...
[2023-03-31 22:21:11,521 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:21:11" (1/1) ...
[2023-03-31 22:21:11,543 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:21:11" (1/1) ...
[2023-03-31 22:21:11,556 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:21:11" (1/1) ...
[2023-03-31 22:21:11,579 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-03-31 22:21:11,580 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-03-31 22:21:11,580 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-03-31 22:21:11,580 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-03-31 22:21:11,581 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:21:11" (1/1) ...
[2023-03-31 22:21:11,588 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-03-31 22:21:11,597 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-03-31 22:21:11,610 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)
[2023-03-31 22:21:11,628 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
[2023-03-31 22:21:11,644 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-03-31 22:21:11,644 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-03-31 22:21:11,644 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-03-31 22:21:11,644 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2023-03-31 22:21:11,644 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2023-03-31 22:21:11,644 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-03-31 22:21:11,644 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2023-03-31 22:21:11,644 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2023-03-31 22:21:11,645 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-03-31 22:21:11,645 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-03-31 22:21:11,645 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-03-31 22:21:11,645 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-03-31 22:21:11,645 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2023-03-31 22:21:11,645 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2023-03-31 22:21:11,645 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-03-31 22:21:11,645 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-03-31 22:21:11,645 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-03-31 22:21:11,645 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-03-31 22:21:11,645 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-03-31 22:21:11,645 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-03-31 22:21:11,646 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-03-31 22:21:11,756 INFO  L236             CfgBuilder]: Building ICFG
[2023-03-31 22:21:11,758 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-03-31 22:21:14,735 INFO  L277             CfgBuilder]: Performing block encoding
[2023-03-31 22:21:23,659 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-03-31 22:21:23,659 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-03-31 22:21:23,664 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:21:23 BoogieIcfgContainer
[2023-03-31 22:21:23,664 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-03-31 22:21:23,666 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-03-31 22:21:23,666 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-03-31 22:21:23,669 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-03-31 22:21:23,669 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:21:10" (1/3) ...
[2023-03-31 22:21:23,670 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69d52030 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:21:23, skipping insertion in model container
[2023-03-31 22:21:23,670 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:21:11" (2/3) ...
[2023-03-31 22:21:23,670 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69d52030 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:21:23, skipping insertion in model container
[2023-03-31 22:21:23,670 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:21:23" (3/3) ...
[2023-03-31 22:21:23,672 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem17_label18.c
[2023-03-31 22:21:23,689 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-03-31 22:21:23,690 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-03-31 22:21:23,751 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-03-31 22:21:23,757 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;@1364bd53, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-03-31 22:21:23,758 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-03-31 22:21:23,764 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2023-03-31 22:21:23,770 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2023-03-31 22:21:23,770 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 22:21:23,771 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 22:21:23,772 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 22:21:23,777 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 22:21:23,777 INFO  L85        PathProgramCache]: Analyzing trace with hash -2084306199, now seen corresponding path program 1 times
[2023-03-31 22:21:23,784 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-03-31 22:21:23,785 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242164704]
[2023-03-31 22:21:23,785 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 22:21:23,785 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 22:21:23,915 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 22:21:24,161 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 22:21:24,162 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-03-31 22:21:24,162 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242164704]
[2023-03-31 22:21:24,162 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242164704] provided 1 perfect and 0 imperfect interpolant sequences
[2023-03-31 22:21:24,163 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-03-31 22:21:24,163 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-03-31 22:21:24,164 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488302245]
[2023-03-31 22:21:24,165 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-03-31 22:21:24,168 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-03-31 22:21:24,168 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-03-31 22:21:24,203 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-03-31 22:21:24,204 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-03-31 22:21:24,208 INFO  L87              Difference]: Start difference. First operand  has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-03-31 22:21:25,835 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-31 22:21:25,835 INFO  L93              Difference]: Finished difference Result 718 states and 1389 transitions.
[2023-03-31 22:21:25,839 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-03-31 22:21:25,840 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11
[2023-03-31 22:21:25,840 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-31 22:21:25,863 INFO  L225             Difference]: With dead ends: 718
[2023-03-31 22:21:25,863 INFO  L226             Difference]: Without dead ends: 471
[2023-03-31 22:21:25,873 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-03-31 22:21:25,877 INFO  L413           NwaCegarLoop]: 180 mSDtfsCounter, 242 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time
[2023-03-31 22:21:25,877 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 195 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time]
[2023-03-31 22:21:25,894 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 471 states.
[2023-03-31 22:21:25,937 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469.
[2023-03-31 22:21:25,939 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 469 states, 459 states have (on average 1.5751633986928104) internal successors, (723), 459 states have internal predecessors, (723), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6)
[2023-03-31 22:21:25,941 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 734 transitions.
[2023-03-31 22:21:25,942 INFO  L78                 Accepts]: Start accepts. Automaton has 469 states and 734 transitions. Word has length 11
[2023-03-31 22:21:25,943 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-31 22:21:25,943 INFO  L495      AbstractCegarLoop]: Abstraction has 469 states and 734 transitions.
[2023-03-31 22:21:25,943 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-03-31 22:21:25,943 INFO  L276                IsEmpty]: Start isEmpty. Operand 469 states and 734 transitions.
[2023-03-31 22:21:25,945 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2023-03-31 22:21:25,945 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 22:21:25,945 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 22:21:25,945 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-03-31 22:21:25,946 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 22:21:25,946 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 22:21:25,946 INFO  L85        PathProgramCache]: Analyzing trace with hash -1764232698, now seen corresponding path program 1 times
[2023-03-31 22:21:25,946 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-03-31 22:21:25,947 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291664034]
[2023-03-31 22:21:25,947 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 22:21:25,947 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 22:21:25,982 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 22:21:26,418 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 22:21:26,418 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-03-31 22:21:26,419 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291664034]
[2023-03-31 22:21:26,419 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291664034] provided 0 perfect and 1 imperfect interpolant sequences
[2023-03-31 22:21:26,419 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997312891]
[2023-03-31 22:21:26,419 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 22:21:26,420 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-03-31 22:21:26,420 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-03-31 22:21:26,425 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-03-31 22:21:26,461 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-03-31 22:21:26,535 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 22:21:26,538 INFO  L262         TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 9 conjunts are in the unsatisfiable core
[2023-03-31 22:21:26,544 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-03-31 22:21:27,996 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 22:21:27,996 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-03-31 22:21:28,707 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 22:21:28,708 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997312891] provided 1 perfect and 1 imperfect interpolant sequences
[2023-03-31 22:21:28,708 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences.
[2023-03-31 22:21:28,708 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13
[2023-03-31 22:21:28,709 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434891540]
[2023-03-31 22:21:28,709 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-03-31 22:21:28,710 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-03-31 22:21:28,710 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-03-31 22:21:28,711 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-03-31 22:21:28,711 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156
[2023-03-31 22:21:28,711 INFO  L87              Difference]: Start difference. First operand 469 states and 734 transitions. Second operand  has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-03-31 22:21:32,903 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []
[2023-03-31 22:21:34,912 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []
[2023-03-31 22:21:36,001 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-31 22:21:36,001 INFO  L93              Difference]: Finished difference Result 1861 states and 2946 transitions.
[2023-03-31 22:21:36,002 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-03-31 22:21:36,002 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26
[2023-03-31 22:21:36,002 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-31 22:21:36,011 INFO  L225             Difference]: With dead ends: 1861
[2023-03-31 22:21:36,012 INFO  L226             Difference]: Without dead ends: 1397
[2023-03-31 22:21:36,013 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156
[2023-03-31 22:21:36,015 INFO  L413           NwaCegarLoop]: 14 mSDtfsCounter, 962 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 1105 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 962 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 2367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1105 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time
[2023-03-31 22:21:36,016 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [962 Valid, 42 Invalid, 2367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1105 Valid, 1260 Invalid, 2 Unknown, 0 Unchecked, 7.2s Time]
[2023-03-31 22:21:36,020 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1397 states.
[2023-03-31 22:21:36,067 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 1131.
[2023-03-31 22:21:36,070 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1131 states, 1113 states have (on average 1.637017070979335) internal successors, (1822), 1115 states have internal predecessors, (1822), 8 states have call successors, (8), 8 states have call predecessors, (8), 9 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26)
[2023-03-31 22:21:36,074 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1856 transitions.
[2023-03-31 22:21:36,074 INFO  L78                 Accepts]: Start accepts. Automaton has 1131 states and 1856 transitions. Word has length 26
[2023-03-31 22:21:36,074 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-31 22:21:36,075 INFO  L495      AbstractCegarLoop]: Abstraction has 1131 states and 1856 transitions.
[2023-03-31 22:21:36,075 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-03-31 22:21:36,075 INFO  L276                IsEmpty]: Start isEmpty. Operand 1131 states and 1856 transitions.
[2023-03-31 22:21:36,077 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 40
[2023-03-31 22:21:36,077 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 22:21:36,077 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 22:21:36,088 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2023-03-31 22:21:36,283 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-03-31 22:21:36,284 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 22:21:36,284 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 22:21:36,284 INFO  L85        PathProgramCache]: Analyzing trace with hash 111957133, now seen corresponding path program 1 times
[2023-03-31 22:21:36,284 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-03-31 22:21:36,285 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144193224]
[2023-03-31 22:21:36,285 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 22:21:36,285 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 22:21:36,310 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 22:21:36,470 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2023-03-31 22:21:36,470 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-03-31 22:21:36,471 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144193224]
[2023-03-31 22:21:36,471 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144193224] provided 0 perfect and 1 imperfect interpolant sequences
[2023-03-31 22:21:36,472 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020240336]
[2023-03-31 22:21:36,472 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 22:21:36,472 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-03-31 22:21:36,472 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-03-31 22:21:36,473 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-03-31 22:21:36,500 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-03-31 22:21:36,573 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 22:21:36,575 INFO  L262         TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 4 conjunts are in the unsatisfiable core
[2023-03-31 22:21:36,578 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-03-31 22:21:36,635 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 22:21:36,635 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-03-31 22:21:36,719 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 22:21:36,719 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020240336] provided 0 perfect and 2 imperfect interpolant sequences
[2023-03-31 22:21:36,720 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [101275677]
[2023-03-31 22:21:36,735 INFO  L159        IcfgInterpreter]: Started Sifa with 22 locations of interest
[2023-03-31 22:21:36,735 INFO  L166        IcfgInterpreter]: Building call graph
[2023-03-31 22:21:36,738 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2023-03-31 22:21:36,742 INFO  L176        IcfgInterpreter]: Starting interpretation
[2023-03-31 22:21:36,742 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2023-03-31 22:21:36,892 INFO  L197        IcfgInterpreter]: Interpreting procedure main with input of size 50 for LOIs
[2023-03-31 22:21:37,066 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 49
[2023-03-31 22:21:37,902 WARN  L176   XnfTransformerHelper]: Simplifying disjunction of 22554 conjuctions. This might take some time...
[2023-03-31 22:21:38,251 INFO  L192   XnfTransformerHelper]: Simplified to disjunction of 158 conjuctions. 
[2023-03-31 22:21:38,316 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 12
[2023-03-31 22:21:38,886 INFO  L197        IcfgInterpreter]: Interpreting procedure calculate_output with input of size 46 for LOIs
[2023-03-31 22:21:39,135 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 49
[2023-03-31 22:21:40,150 WARN  L176   XnfTransformerHelper]: Simplifying disjunction of 15958 conjuctions. This might take some time...
[2023-03-31 22:21:40,575 INFO  L192   XnfTransformerHelper]: Simplified to disjunction of 157 conjuctions. 
[2023-03-31 22:22:05,622 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 12
[2023-03-31 22:22:07,237 WARN  L176   XnfTransformerHelper]: Simplifying disjunction of 486780 conjuctions. This might take some time...