/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_unwindbound20.c


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


This is Ultimate 0.2.2-dev-a10ec3b
[2022-01-09 22:49:58,453 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-01-09 22:49:58,455 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-01-09 22:49:58,518 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-01-09 22:49:58,519 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-01-09 22:49:58,521 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-01-09 22:49:58,523 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-01-09 22:49:58,525 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-01-09 22:49:58,526 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-01-09 22:49:58,529 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-01-09 22:49:58,530 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2022-01-09 22:49:58,531 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-01-09 22:49:58,531 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-01-09 22:49:58,533 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-01-09 22:49:58,534 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-01-09 22:49:58,536 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-01-09 22:49:58,536 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-01-09 22:49:58,537 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-01-09 22:49:58,539 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-01-09 22:49:58,543 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-01-09 22:49:58,543 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-01-09 22:49:58,544 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-01-09 22:49:58,545 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-01-09 22:49:58,546 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-01-09 22:49:58,550 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-01-09 22:49:58,551 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-01-09 22:49:58,551 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-01-09 22:49:58,552 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-01-09 22:49:58,552 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-01-09 22:49:58,552 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-01-09 22:49:58,553 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-01-09 22:49:58,553 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-01-09 22:49:58,554 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-01-09 22:49:58,555 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-01-09 22:49:58,556 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-01-09 22:49:58,556 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-01-09 22:49:58,556 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-01-09 22:49:58,556 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-01-09 22:49:58,556 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-01-09 22:49:58,557 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-01-09 22:49:58,557 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-01-09 22:49:58,559 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf
[2022-01-09 22:49:58,583 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-01-09 22:49:58,584 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-01-09 22:49:58,584 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-01-09 22:49:58,584 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-01-09 22:49:58,585 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2022-01-09 22:49:58,585 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2022-01-09 22:49:58,585 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-01-09 22:49:58,585 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-01-09 22:49:58,585 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-01-09 22:49:58,586 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-01-09 22:49:58,586 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-01-09 22:49:58,586 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-01-09 22:49:58,586 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-01-09 22:49:58,586 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-01-09 22:49:58,586 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-01-09 22:49:58,587 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2022-01-09 22:49:58,587 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-01-09 22:49:58,587 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-01-09 22:49:58,587 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-01-09 22:49:58,587 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-01-09 22:49:58,587 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-01-09 22:49:58,587 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-09 22:49:58,587 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-01-09 22:49:58,587 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-01-09 22:49:58,588 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-01-09 22:49:58,588 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-01-09 22:49:58,588 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-01-09 22:49:58,588 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2022-01-09 22:49:58,589 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-01-09 22:49:58,589 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-01-09 22:49:58,589 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-01-09 22:49:58,765 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-01-09 22:49:58,780 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-01-09 22:49:58,782 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-01-09 22:49:58,782 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-01-09 22:49:58,783 INFO  L275        PluginConnector]: CDTParser initialized
[2022-01-09 22:49:58,784 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_unwindbound20.c
[2022-01-09 22:49:58,818 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b40aea82a/e4e5abe61efd4dd4a06cd88e7d2a8944/FLAG2795c0066
[2022-01-09 22:49:59,252 INFO  L306              CDTParser]: Found 1 translation units.
[2022-01-09 22:49:59,253 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_unwindbound20.c
[2022-01-09 22:49:59,258 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b40aea82a/e4e5abe61efd4dd4a06cd88e7d2a8944/FLAG2795c0066
[2022-01-09 22:49:59,614 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b40aea82a/e4e5abe61efd4dd4a06cd88e7d2a8944
[2022-01-09 22:49:59,616 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-01-09 22:49:59,617 INFO  L131        ToolchainWalker]: Walking toolchain with 5 elements.
[2022-01-09 22:49:59,620 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-01-09 22:49:59,620 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-01-09 22:49:59,622 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-01-09 22:49:59,623 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:49:59" (1/1) ...
[2022-01-09 22:49:59,623 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ac3f8e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:49:59, skipping insertion in model container
[2022-01-09 22:49:59,624 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:49:59" (1/1) ...
[2022-01-09 22:49:59,628 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-01-09 22:49:59,637 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-01-09 22:49:59,743 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_unwindbound20.c[454,467]
[2022-01-09 22:49:59,761 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-09 22:49:59,767 INFO  L203         MainTranslator]: Completed pre-run
[2022-01-09 22:49:59,773 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_unwindbound20.c[454,467]
[2022-01-09 22:49:59,776 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-09 22:49:59,784 INFO  L208         MainTranslator]: Completed translation
[2022-01-09 22:49:59,784 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:49:59 WrapperNode
[2022-01-09 22:49:59,784 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-01-09 22:49:59,785 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-01-09 22:49:59,785 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-01-09 22:49:59,785 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-01-09 22:49:59,790 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:49:59" (1/1) ...
[2022-01-09 22:49:59,794 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:49:59" (1/1) ...
[2022-01-09 22:49:59,804 INFO  L137                Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 38
[2022-01-09 22:49:59,804 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-01-09 22:49:59,805 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-01-09 22:49:59,805 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-01-09 22:49:59,805 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-01-09 22:49:59,809 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:49:59" (1/1) ...
[2022-01-09 22:49:59,809 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:49:59" (1/1) ...
[2022-01-09 22:49:59,810 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:49:59" (1/1) ...
[2022-01-09 22:49:59,810 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:49:59" (1/1) ...
[2022-01-09 22:49:59,817 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:49:59" (1/1) ...
[2022-01-09 22:49:59,819 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:49:59" (1/1) ...
[2022-01-09 22:49:59,821 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:49:59" (1/1) ...
[2022-01-09 22:49:59,827 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-01-09 22:49:59,828 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-01-09 22:49:59,828 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-01-09 22:49:59,829 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-01-09 22:49:59,830 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:49:59" (1/1) ...
[2022-01-09 22:49:59,834 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-09 22:49:59,843 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-09 22:49:59,852 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)
[2022-01-09 22:49:59,872 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
[2022-01-09 22:49:59,883 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-01-09 22:49:59,885 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2022-01-09 22:49:59,885 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-01-09 22:49:59,885 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-01-09 22:49:59,885 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2022-01-09 22:49:59,885 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2022-01-09 22:49:59,919 INFO  L234             CfgBuilder]: Building ICFG
[2022-01-09 22:49:59,920 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-01-09 22:50:00,005 INFO  L275             CfgBuilder]: Performing block encoding
[2022-01-09 22:50:00,008 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-01-09 22:50:00,009 INFO  L299             CfgBuilder]: Removed 1 assume(true) statements.
[2022-01-09 22:50:00,010 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:50:00 BoogieIcfgContainer
[2022-01-09 22:50:00,010 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-01-09 22:50:00,011 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-01-09 22:50:00,011 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-01-09 22:50:00,013 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-01-09 22:50:00,013 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 10:49:59" (1/3) ...
[2022-01-09 22:50:00,013 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c29fde8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:50:00, skipping insertion in model container
[2022-01-09 22:50:00,013 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:49:59" (2/3) ...
[2022-01-09 22:50:00,014 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c29fde8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:50:00, skipping insertion in model container
[2022-01-09 22:50:00,014 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:50:00" (3/3) ...
[2022-01-09 22:50:00,014 INFO  L111   eAbstractionObserver]: Analyzing ICFG ps2-ll_unwindbound20.c
[2022-01-09 22:50:00,017 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-01-09 22:50:00,017 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-01-09 22:50:00,045 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-01-09 22:50:00,049 INFO  L339      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=PETRI_NET, 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, mLoopAccelerationTechnique=FAST_UPR
[2022-01-09 22:50:00,049 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-01-09 22:50:00,059 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2022-01-09 22:50:00,062 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8
[2022-01-09 22:50:00,062 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-09 22:50:00,062 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1]
[2022-01-09 22:50:00,062 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-09 22:50:00,066 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-09 22:50:00,066 INFO  L85        PathProgramCache]: Analyzing trace with hash 1819757606, now seen corresponding path program 1 times
[2022-01-09 22:50:00,071 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-09 22:50:00,071 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721348725]
[2022-01-09 22:50:00,072 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-09 22:50:00,072 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-09 22:50:00,131 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-09 22:50:00,168 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-09 22:50:00,168 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-09 22:50:00,169 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721348725]
[2022-01-09 22:50:00,169 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721348725] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-09 22:50:00,169 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-09 22:50:00,170 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-01-09 22:50:00,171 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734572744]
[2022-01-09 22:50:00,171 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-09 22:50:00,174 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2022-01-09 22:50:00,174 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-09 22:50:00,194 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2022-01-09 22:50:00,195 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-01-09 22:50:00,196 INFO  L87              Difference]: Start difference. First operand  has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand  has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-09 22:50:00,207 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-09 22:50:00,208 INFO  L93              Difference]: Finished difference Result 32 states and 42 transitions.
[2022-01-09 22:50:00,208 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2022-01-09 22:50:00,209 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7
[2022-01-09 22:50:00,209 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-09 22:50:00,213 INFO  L225             Difference]: With dead ends: 32
[2022-01-09 22:50:00,213 INFO  L226             Difference]: Without dead ends: 13
[2022-01-09 22:50:00,215 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-01-09 22:50:00,218 INFO  L933         BasicCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-09 22:50:00,218 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-09 22:50:00,228 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13 states.
[2022-01-09 22:50:00,236 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13.
[2022-01-09 22:50:00,237 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-01-09 22:50:00,238 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions.
[2022-01-09 22:50:00,238 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7
[2022-01-09 22:50:00,238 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-09 22:50:00,239 INFO  L470      AbstractCegarLoop]: Abstraction has 13 states and 15 transitions.
[2022-01-09 22:50:00,239 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-09 22:50:00,239 INFO  L276                IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions.
[2022-01-09 22:50:00,240 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9
[2022-01-09 22:50:00,240 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-09 22:50:00,240 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-09 22:50:00,240 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-01-09 22:50:00,241 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-09 22:50:00,243 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-09 22:50:00,243 INFO  L85        PathProgramCache]: Analyzing trace with hash 178410715, now seen corresponding path program 1 times
[2022-01-09 22:50:00,243 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-09 22:50:00,243 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327224204]
[2022-01-09 22:50:00,243 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-09 22:50:00,244 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-09 22:50:00,268 ERROR L247   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-01-09 22:50:00,269 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1081216391]
[2022-01-09 22:50:00,269 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-09 22:50:00,269 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-09 22:50:00,269 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-09 22:50:00,284 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)
[2022-01-09 22:50:00,299 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-01-09 22:50:00,336 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-09 22:50:00,337 INFO  L263         TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core
[2022-01-09 22:50:00,339 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-09 22:50:00,379 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-09 22:50:00,379 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-01-09 22:50:00,379 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-09 22:50:00,379 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327224204]
[2022-01-09 22:50:00,379 WARN  L312   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-01-09 22:50:00,380 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081216391]
[2022-01-09 22:50:00,380 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081216391] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-09 22:50:00,380 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-09 22:50:00,380 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-01-09 22:50:00,380 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337373200]
[2022-01-09 22:50:00,381 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-09 22:50:00,381 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-01-09 22:50:00,381 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-09 22:50:00,381 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-01-09 22:50:00,381 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-01-09 22:50:00,382 INFO  L87              Difference]: Start difference. First operand 13 states and 15 transitions. Second operand  has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-09 22:50:00,391 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-09 22:50:00,391 INFO  L93              Difference]: Finished difference Result 22 states and 24 transitions.
[2022-01-09 22:50:00,392 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-01-09 22:50:00,392 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8
[2022-01-09 22:50:00,392 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-09 22:50:00,392 INFO  L225             Difference]: With dead ends: 22
[2022-01-09 22:50:00,392 INFO  L226             Difference]: Without dead ends: 15
[2022-01-09 22:50:00,392 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-01-09 22:50:00,393 INFO  L933         BasicCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-09 22:50:00,394 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-09 22:50:00,394 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 15 states.
[2022-01-09 22:50:00,396 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15.
[2022-01-09 22:50:00,396 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-01-09 22:50:00,396 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions.
[2022-01-09 22:50:00,397 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 8
[2022-01-09 22:50:00,397 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-09 22:50:00,397 INFO  L470      AbstractCegarLoop]: Abstraction has 15 states and 17 transitions.
[2022-01-09 22:50:00,397 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-09 22:50:00,397 INFO  L276                IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions.
[2022-01-09 22:50:00,397 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9
[2022-01-09 22:50:00,397 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-09 22:50:00,397 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-09 22:50:00,416 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2022-01-09 22:50:00,613 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-09 22:50:00,614 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-09 22:50:00,614 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-09 22:50:00,614 INFO  L85        PathProgramCache]: Analyzing trace with hash 180198175, now seen corresponding path program 1 times
[2022-01-09 22:50:00,614 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-09 22:50:00,615 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813659366]
[2022-01-09 22:50:00,615 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-09 22:50:00,615 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-09 22:50:00,621 ERROR L247   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-01-09 22:50:00,621 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [350959270]
[2022-01-09 22:50:00,621 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-09 22:50:00,621 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-09 22:50:00,622 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-09 22:50:00,642 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)
[2022-01-09 22:50:00,658 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-01-09 22:50:00,675 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-09 22:50:00,675 INFO  L263         TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-01-09 22:50:00,676 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-09 22:50:00,733 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-09 22:50:00,733 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-01-09 22:50:00,733 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-09 22:50:00,733 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813659366]
[2022-01-09 22:50:00,733 WARN  L312   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-01-09 22:50:00,734 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350959270]
[2022-01-09 22:50:00,734 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [350959270] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-09 22:50:00,734 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-09 22:50:00,734 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-01-09 22:50:00,734 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523155169]
[2022-01-09 22:50:00,734 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-09 22:50:00,734 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-01-09 22:50:00,735 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-09 22:50:00,735 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-01-09 22:50:00,735 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-01-09 22:50:00,735 INFO  L87              Difference]: Start difference. First operand 15 states and 17 transitions. Second operand  has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-09 22:50:00,773 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-09 22:50:00,773 INFO  L93              Difference]: Finished difference Result 24 states and 27 transitions.
[2022-01-09 22:50:00,774 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-01-09 22:50:00,774 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8
[2022-01-09 22:50:00,774 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-09 22:50:00,775 INFO  L225             Difference]: With dead ends: 24
[2022-01-09 22:50:00,775 INFO  L226             Difference]: Without dead ends: 21
[2022-01-09 22:50:00,775 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2022-01-09 22:50:00,776 INFO  L933         BasicCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-09 22:50:00,776 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 45 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-09 22:50:00,777 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 21 states.
[2022-01-09 22:50:00,779 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21.
[2022-01-09 22:50:00,779 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 21 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2022-01-09 22:50:00,780 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions.
[2022-01-09 22:50:00,780 INFO  L78                 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 8
[2022-01-09 22:50:00,780 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-09 22:50:00,780 INFO  L470      AbstractCegarLoop]: Abstraction has 21 states and 23 transitions.
[2022-01-09 22:50:00,780 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-09 22:50:00,780 INFO  L276                IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions.
[2022-01-09 22:50:00,781 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2022-01-09 22:50:00,781 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-09 22:50:00,781 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-09 22:50:00,817 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2022-01-09 22:50:01,018 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2
[2022-01-09 22:50:01,018 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-09 22:50:01,019 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-09 22:50:01,019 INFO  L85        PathProgramCache]: Analyzing trace with hash -1542398814, now seen corresponding path program 1 times
[2022-01-09 22:50:01,019 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-09 22:50:01,019 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348378098]
[2022-01-09 22:50:01,019 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-09 22:50:01,019 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-09 22:50:01,026 ERROR L247   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-01-09 22:50:01,026 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1970672372]
[2022-01-09 22:50:01,026 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-09 22:50:01,026 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-09 22:50:01,026 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-09 22:50:01,042 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-01-09 22:50:01,044 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2022-01-09 22:50:01,077 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-09 22:50:01,077 INFO  L263         TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core
[2022-01-09 22:50:01,078 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-09 22:50:01,117 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-09 22:50:01,118 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-09 22:50:01,162 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-09 22:50:01,163 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-09 22:50:01,163 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348378098]
[2022-01-09 22:50:01,163 WARN  L312   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-01-09 22:50:01,163 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970672372]
[2022-01-09 22:50:01,163 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970672372] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-09 22:50:01,163 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-01-09 22:50:01,163 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8
[2022-01-09 22:50:01,163 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003967800]
[2022-01-09 22:50:01,164 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-01-09 22:50:01,164 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-01-09 22:50:01,164 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-09 22:50:01,164 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-01-09 22:50:01,164 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56
[2022-01-09 22:50:01,165 INFO  L87              Difference]: Start difference. First operand 21 states and 23 transitions. Second operand  has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2022-01-09 22:50:01,207 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-09 22:50:01,207 INFO  L93              Difference]: Finished difference Result 52 states and 58 transitions.
[2022-01-09 22:50:01,207 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2022-01-09 22:50:01,207 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16
[2022-01-09 22:50:01,207 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-09 22:50:01,208 INFO  L225             Difference]: With dead ends: 52
[2022-01-09 22:50:01,208 INFO  L226             Difference]: Without dead ends: 45
[2022-01-09 22:50:01,208 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110
[2022-01-09 22:50:01,209 INFO  L933         BasicCegarLoop]: 16 mSDtfsCounter, 23 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-09 22:50:01,209 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 64 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-09 22:50:01,210 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 45 states.
[2022-01-09 22:50:01,214 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41.
[2022-01-09 22:50:01,214 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 41 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 32 states have internal predecessors, (36), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2022-01-09 22:50:01,215 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions.
[2022-01-09 22:50:01,215 INFO  L78                 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 16
[2022-01-09 22:50:01,215 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-09 22:50:01,215 INFO  L470      AbstractCegarLoop]: Abstraction has 41 states and 47 transitions.
[2022-01-09 22:50:01,215 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2022-01-09 22:50:01,215 INFO  L276                IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions.
[2022-01-09 22:50:01,216 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2022-01-09 22:50:01,216 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-09 22:50:01,216 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-09 22:50:01,242 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2022-01-09 22:50:01,442 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-09 22:50:01,442 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-09 22:50:01,443 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-09 22:50:01,443 INFO  L85        PathProgramCache]: Analyzing trace with hash -1540611354, now seen corresponding path program 1 times
[2022-01-09 22:50:01,443 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-09 22:50:01,443 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621365384]
[2022-01-09 22:50:01,443 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-09 22:50:01,443 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-09 22:50:01,449 ERROR L247   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-01-09 22:50:01,449 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1589933932]
[2022-01-09 22:50:01,449 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-09 22:50:01,449 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-09 22:50:01,449 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-09 22:50:01,450 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-01-09 22:50:01,455 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2022-01-09 22:50:01,485 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-09 22:50:01,487 INFO  L263         TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core
[2022-01-09 22:50:01,489 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-09 22:50:01,563 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-09 22:50:01,563 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-09 22:50:01,643 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2022-01-09 22:50:01,644 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-09 22:50:01,644 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621365384]
[2022-01-09 22:50:01,644 WARN  L312   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-01-09 22:50:01,644 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589933932]
[2022-01-09 22:50:01,644 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589933932] provided 1 perfect and 1 imperfect interpolant sequences
[2022-01-09 22:50:01,644 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2022-01-09 22:50:01,644 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7
[2022-01-09 22:50:01,644 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504107607]
[2022-01-09 22:50:01,644 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-09 22:50:01,645 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-01-09 22:50:01,645 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-09 22:50:01,645 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-01-09 22:50:01,645 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2022-01-09 22:50:01,645 INFO  L87              Difference]: Start difference. First operand 41 states and 47 transitions. Second operand  has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-01-09 22:50:01,660 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-09 22:50:01,660 INFO  L93              Difference]: Finished difference Result 41 states and 47 transitions.
[2022-01-09 22:50:01,660 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-01-09 22:50:01,660 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16
[2022-01-09 22:50:01,661 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-09 22:50:01,661 INFO  L225             Difference]: With dead ends: 41
[2022-01-09 22:50:01,661 INFO  L226             Difference]: Without dead ends: 0
[2022-01-09 22:50:01,661 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2022-01-09 22:50:01,662 INFO  L933         BasicCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-09 22:50:01,662 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 27 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-09 22:50:01,662 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2022-01-09 22:50:01,663 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2022-01-09 22:50:01,663 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-09 22:50:01,663 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2022-01-09 22:50:01,663 INFO  L78                 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16
[2022-01-09 22:50:01,663 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-09 22:50:01,663 INFO  L470      AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2022-01-09 22:50:01,663 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-01-09 22:50:01,663 INFO  L276                IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2022-01-09 22:50:01,663 INFO  L282                IsEmpty]: Finished isEmpty. No accepting run.
[2022-01-09 22:50:01,665 INFO  L764   garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining)
[2022-01-09 22:50:01,705 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2022-01-09 22:50:01,879 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-09 22:50:01,881 INFO  L343    DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.
[2022-01-09 22:50:01,906 INFO  L858   garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed.
[2022-01-09 22:50:01,907 INFO  L858   garLoopResultBuilder]: For program point L27-1(lines 27 36) no Hoare annotation was computed.
[2022-01-09 22:50:01,907 INFO  L854   garLoopResultBuilder]: At program point L27-3(lines 27 36) the Hoare annotation is: (= (* 2 |ULTIMATE.start_main_~x~0#1|) (+ |ULTIMATE.start_main_~y~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)))
[2022-01-09 22:50:01,907 INFO  L854   garLoopResultBuilder]: At program point L27-4(lines 27 36) the Hoare annotation is: (= (* 2 |ULTIMATE.start_main_~x~0#1|) (+ |ULTIMATE.start_main_~y~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)))
[2022-01-09 22:50:01,907 INFO  L858   garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed.
[2022-01-09 22:50:01,907 INFO  L858   garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed.
[2022-01-09 22:50:01,907 INFO  L858   garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed.
[2022-01-09 22:50:01,907 INFO  L854   garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: (= (* 2 |ULTIMATE.start_main_~x~0#1|) (+ |ULTIMATE.start_main_~y~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)))
[2022-01-09 22:50:01,908 INFO  L858   garLoopResultBuilder]: For program point L28-1(lines 27 36) no Hoare annotation was computed.
[2022-01-09 22:50:01,908 INFO  L861   garLoopResultBuilder]: At program point L39(lines 18 40) the Hoare annotation is: true
[2022-01-09 22:50:01,908 INFO  L858   garLoopResultBuilder]: For program point L37(line 37) no Hoare annotation was computed.
[2022-01-09 22:50:01,908 INFO  L861   garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true
[2022-01-09 22:50:01,908 INFO  L858   garLoopResultBuilder]: For program point L11(lines 11 12) no Hoare annotation was computed.
[2022-01-09 22:50:01,908 INFO  L858   garLoopResultBuilder]: For program point L10(lines 10 13) no Hoare annotation was computed.
[2022-01-09 22:50:01,908 INFO  L858   garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed.
[2022-01-09 22:50:01,908 INFO  L858   garLoopResultBuilder]: For program point L10-2(lines 9 15) no Hoare annotation was computed.
[2022-01-09 22:50:01,908 INFO  L858   garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed.
[2022-01-09 22:50:01,910 INFO  L732         BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1]
[2022-01-09 22:50:01,911 INFO  L179   ceAbstractionStarter]: Computing trace abstraction results
[2022-01-09 22:50:01,920 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.01 10:50:01 BoogieIcfgContainer
[2022-01-09 22:50:01,920 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2022-01-09 22:50:01,920 INFO  L158              Benchmark]: Toolchain (without parser) took 2302.96ms. Allocated memory is still 200.3MB. Free memory was 149.6MB in the beginning and 86.3MB in the end (delta: 63.3MB). Peak memory consumption was 63.4MB. Max. memory is 8.0GB.
[2022-01-09 22:50:01,920 INFO  L158              Benchmark]: CDTParser took 0.09ms. Allocated memory is still 200.3MB. Free memory is still 166.0MB. There was no memory consumed. Max. memory is 8.0GB.
[2022-01-09 22:50:01,921 INFO  L158              Benchmark]: CACSL2BoogieTranslator took 164.68ms. Allocated memory is still 200.3MB. Free memory was 149.3MB in the beginning and 177.0MB in the end (delta: -27.7MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB.
[2022-01-09 22:50:01,921 INFO  L158              Benchmark]: Boogie Procedure Inliner took 19.40ms. Allocated memory is still 200.3MB. Free memory was 177.0MB in the beginning and 175.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB.
[2022-01-09 22:50:01,921 INFO  L158              Benchmark]: Boogie Preprocessor took 23.02ms. Allocated memory is still 200.3MB. Free memory was 175.4MB in the beginning and 174.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB.
[2022-01-09 22:50:01,922 INFO  L158              Benchmark]: RCFGBuilder took 181.34ms. Allocated memory is still 200.3MB. Free memory was 174.4MB in the beginning and 164.4MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB.
[2022-01-09 22:50:01,922 INFO  L158              Benchmark]: TraceAbstraction took 1909.27ms. Allocated memory is still 200.3MB. Free memory was 163.9MB in the beginning and 86.3MB in the end (delta: 77.6MB). Peak memory consumption was 77.6MB. Max. memory is 8.0GB.
[2022-01-09 22:50:01,923 INFO  L339   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.09ms. Allocated memory is still 200.3MB. Free memory is still 166.0MB. There was no memory consumed. Max. memory is 8.0GB.
 * CACSL2BoogieTranslator took 164.68ms. Allocated memory is still 200.3MB. Free memory was 149.3MB in the beginning and 177.0MB in the end (delta: -27.7MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB.
 * Boogie Procedure Inliner took 19.40ms. Allocated memory is still 200.3MB. Free memory was 177.0MB in the beginning and 175.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB.
 * Boogie Preprocessor took 23.02ms. Allocated memory is still 200.3MB. Free memory was 175.4MB in the beginning and 174.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB.
 * RCFGBuilder took 181.34ms. Allocated memory is still 200.3MB. Free memory was 174.4MB in the beginning and 164.4MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB.
 * TraceAbstraction took 1909.27ms. Allocated memory is still 200.3MB. Free memory was 163.9MB in the beginning and 86.3MB in the end (delta: 77.6MB). Peak memory consumption was 77.6MB. Max. memory is 8.0GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - StatisticsResult: ErrorAutomatonStatistics
    NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0
  - PositiveResult [Line: 12]: call to reach_error is unreachable
    For all program executions holds that call to reach_error is unreachable at this location
  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.9s, OverallIterations: 5, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 37 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 36 mSDsluCounter, 190 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 121 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 60 IncrementalHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 69 mSDtfsCounter, 60 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 81 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=4, InterpolantAutomatonStates: 26, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 16 PreInvPairs, 30 NumberOfFragments, 29 HoareAnnotationTreeSize, 16 FomulaSimplifications, 131 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 56 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 55 NumberOfCodeBlocks, 55 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 80 ConstructedInterpolants, 0 QuantifiedInterpolants, 250 SizeOfPredicates, 3 NumberOfNonLiveVariables, 238 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 11/18 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
  - AllSpecificationsHoldResult: All specifications hold
    1 specifications checked. All of them hold
  - InvariantResult [Line: 27]: Loop Invariant
    Derived loop invariant: 2 * x == y + y * y
  - InvariantResult [Line: 18]: Loop Invariant
    Derived loop invariant: 1
RESULT: Ultimate proved your program to be correct!
[2022-01-09 22:50:01,946 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0
Received shutdown request...