/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_vardep_2.c


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


This is Ultimate 0.2.1-dev-36cd7be
[2021-02-24 00:17:47,401 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2021-02-24 00:17:47,404 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2021-02-24 00:17:47,450 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-02-24 00:17:47,451 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-02-24 00:17:47,455 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-02-24 00:17:47,459 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2021-02-24 00:17:47,467 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2021-02-24 00:17:47,471 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2021-02-24 00:17:47,477 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2021-02-24 00:17:47,478 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2021-02-24 00:17:47,480 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2021-02-24 00:17:47,481 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2021-02-24 00:17:47,484 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2021-02-24 00:17:47,486 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2021-02-24 00:17:47,488 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-02-24 00:17:47,492 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-02-24 00:17:47,514 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-02-24 00:17:47,522 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-02-24 00:17:47,530 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2021-02-24 00:17:47,533 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-02-24 00:17:47,535 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-02-24 00:17:47,537 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2021-02-24 00:17:47,540 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2021-02-24 00:17:47,549 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2021-02-24 00:17:47,549 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2021-02-24 00:17:47,550 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2021-02-24 00:17:47,552 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2021-02-24 00:17:47,553 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2021-02-24 00:17:47,554 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2021-02-24 00:17:47,554 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2021-02-24 00:17:47,555 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2021-02-24 00:17:47,557 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2021-02-24 00:17:47,558 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2021-02-24 00:17:47,559 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2021-02-24 00:17:47,560 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2021-02-24 00:17:47,561 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2021-02-24 00:17:47,561 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2021-02-24 00:17:47,561 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2021-02-24 00:17:47,562 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2021-02-24 00:17:47,563 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2021-02-24 00:17:47,564 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf
[2021-02-24 00:17:47,587 INFO  L113        SettingsManager]: Loading preferences was successful
[2021-02-24 00:17:47,587 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2021-02-24 00:17:47,591 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-02-24 00:17:47,592 INFO  L138        SettingsManager]:  * sizeof long=4
[2021-02-24 00:17:47,592 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2021-02-24 00:17:47,592 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2021-02-24 00:17:47,592 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2021-02-24 00:17:47,593 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2021-02-24 00:17:47,593 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-02-24 00:17:47,593 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2021-02-24 00:17:47,594 INFO  L138        SettingsManager]:  * sizeof long double=12
[2021-02-24 00:17:47,595 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2021-02-24 00:17:47,595 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2021-02-24 00:17:47,595 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2021-02-24 00:17:47,596 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-02-24 00:17:47,596 INFO  L138        SettingsManager]:  * Size of a code block=SingleStatement
[2021-02-24 00:17:47,596 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2021-02-24 00:17:47,596 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2021-02-24 00:17:47,596 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-02-24 00:17:47,597 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-02-24 00:17:47,597 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=AcceleratedInterpolation
[2021-02-24 00:17:47,597 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-02-24 00:17:47,597 INFO  L138        SettingsManager]:  * Use separate solver for trace checks=false
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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true
[2021-02-24 00:17:48,007 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2021-02-24 00:17:48,033 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-02-24 00:17:48,037 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-02-24 00:17:48,038 INFO  L271        PluginConnector]: Initializing CDTParser...
[2021-02-24 00:17:48,041 INFO  L275        PluginConnector]: CDTParser initialized
[2021-02-24 00:17:48,042 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_vardep_2.c
[2021-02-24 00:17:48,130 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7d635dc0/81a9147a59ac4b5aa474b73f63b78d18/FLAG656848edf
[2021-02-24 00:17:48,735 INFO  L306              CDTParser]: Found 1 translation units.
[2021-02-24 00:17:48,736 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_vardep_2.c
[2021-02-24 00:17:48,743 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7d635dc0/81a9147a59ac4b5aa474b73f63b78d18/FLAG656848edf
[2021-02-24 00:17:49,121 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7d635dc0/81a9147a59ac4b5aa474b73f63b78d18
[2021-02-24 00:17:49,124 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-02-24 00:17:49,139 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2021-02-24 00:17:49,145 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-02-24 00:17:49,145 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-02-24 00:17:49,150 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2021-02-24 00:17:49,151 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:17:49" (1/1) ...
[2021-02-24 00:17:49,152 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b87d29d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:49, skipping insertion in model container
[2021-02-24 00:17:49,153 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:17:49" (1/1) ...
[2021-02-24 00:17:49,163 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2021-02-24 00:17:49,180 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2021-02-24 00:17:49,399 WARN  L226   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_vardep_2.c[584,597]
[2021-02-24 00:17:49,420 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2021-02-24 00:17:49,435 INFO  L203         MainTranslator]: Completed pre-run
[2021-02-24 00:17:49,449 WARN  L226   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_vardep_2.c[584,597]
[2021-02-24 00:17:49,455 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2021-02-24 00:17:49,472 INFO  L208         MainTranslator]: Completed translation
[2021-02-24 00:17:49,473 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:49 WrapperNode
[2021-02-24 00:17:49,473 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-02-24 00:17:49,477 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-02-24 00:17:49,477 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2021-02-24 00:17:49,477 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2021-02-24 00:17:49,490 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:49" (1/1) ...
[2021-02-24 00:17:49,490 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:49" (1/1) ...
[2021-02-24 00:17:49,498 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:49" (1/1) ...
[2021-02-24 00:17:49,498 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:49" (1/1) ...
[2021-02-24 00:17:49,503 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:49" (1/1) ...
[2021-02-24 00:17:49,508 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:49" (1/1) ...
[2021-02-24 00:17:49,509 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:49" (1/1) ...
[2021-02-24 00:17:49,511 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-02-24 00:17:49,513 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-02-24 00:17:49,513 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2021-02-24 00:17:49,513 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2021-02-24 00:17:49,514 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:49" (1/1) ...
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-02-24 00:17:49,612 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2021-02-24 00:17:49,612 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-02-24 00:17:49,612 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2021-02-24 00:17:49,613 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2021-02-24 00:17:49,613 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2021-02-24 00:17:49,613 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2021-02-24 00:17:49,613 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2021-02-24 00:17:49,614 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2021-02-24 00:17:49,614 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-02-24 00:17:49,614 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2021-02-24 00:17:49,615 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2021-02-24 00:17:49,615 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2021-02-24 00:17:49,616 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2021-02-24 00:17:49,616 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-02-24 00:17:49,617 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2021-02-24 00:17:49,617 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2021-02-24 00:17:49,618 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2021-02-24 00:17:49,871 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-02-24 00:17:49,871 INFO  L299             CfgBuilder]: Removed 1 assume(true) statements.
[2021-02-24 00:17:49,873 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:17:49 BoogieIcfgContainer
[2021-02-24 00:17:49,874 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-02-24 00:17:49,896 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-02-24 00:17:49,897 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2021-02-24 00:17:49,908 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2021-02-24 00:17:49,909 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 12:17:49" (1/3) ...
[2021-02-24 00:17:49,910 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41bc308 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:17:49, skipping insertion in model container
[2021-02-24 00:17:49,911 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:49" (2/3) ...
[2021-02-24 00:17:49,911 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41bc308 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:17:49, skipping insertion in model container
[2021-02-24 00:17:49,911 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:17:49" (3/3) ...
[2021-02-24 00:17:49,913 INFO  L111   eAbstractionObserver]: Analyzing ICFG simple_vardep_2.c
[2021-02-24 00:17:49,923 INFO  L153   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2021-02-24 00:17:49,929 INFO  L165   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2021-02-24 00:17:49,954 INFO  L253      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-02-24 00:17:50,004 INFO  L376      AbstractCegarLoop]: Interprodecural is true
[2021-02-24 00:17:50,004 INFO  L377      AbstractCegarLoop]: Hoare is true
[2021-02-24 00:17:50,005 INFO  L378      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2021-02-24 00:17:50,005 INFO  L379      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2021-02-24 00:17:50,005 INFO  L380      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2021-02-24 00:17:50,005 INFO  L381      AbstractCegarLoop]: Difference is false
[2021-02-24 00:17:50,005 INFO  L382      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2021-02-24 00:17:50,005 INFO  L386      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2021-02-24 00:17:50,043 INFO  L276                IsEmpty]: Start isEmpty. Operand 31 states.
[2021-02-24 00:17:50,064 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2021-02-24 00:17:50,064 INFO  L414         BasicCegarLoop]: Found error trace
[2021-02-24 00:17:50,068 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-02-24 00:17:50,069 INFO  L428      AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-24 00:17:50,084 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-02-24 00:17:50,086 INFO  L82        PathProgramCache]: Analyzing trace with hash -1490799159, now seen corresponding path program 1 times
[2021-02-24 00:17:50,105 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-02-24 00:17:50,111 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167150941]
[2021-02-24 00:17:50,112 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-24 00:17:50,339 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-24 00:17:50,595 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 00:17:50,597 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-24 00:17:50,599 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 00:17:50,601 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3
[2021-02-24 00:17:50,631 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 00:17:50,632 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7
[2021-02-24 00:17:50,658 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 00:17:50,663 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10
[2021-02-24 00:17:50,686 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 00:17:50,689 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13
[2021-02-24 00:17:50,741 WARN  L141       QuantifierPusher]: treesize reduction 23, result has 83.6 percent of original size
[2021-02-24 00:17:50,758 WARN  L147       QuantifierPusher]: treesize reduction 23, result has 83.6 percent of original size 117
[2021-02-24 00:17:50,899 WARN  L141       QuantifierPusher]: treesize reduction 46, result has 82.4 percent of original size
[2021-02-24 00:17:50,920 WARN  L147       QuantifierPusher]: treesize reduction 46, result has 82.4 percent of original size 215
[2021-02-24 00:17:51,117 WARN  L202               SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35
[2021-02-24 00:17:51,123 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 00:17:51,124 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4
[2021-02-24 00:17:51,142 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 00:17:51,144 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4
[2021-02-24 00:17:51,158 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 00:17:51,160 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-24 00:17:51,210 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-02-24 00:17:51,227 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-24 00:17:51,252 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 00:17:51,254 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-24 00:17:51,263 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-02-24 00:17:51,265 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167150941]
[2021-02-24 00:17:51,268 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-02-24 00:17:51,268 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11
[2021-02-24 00:17:51,269 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808064738]
[2021-02-24 00:17:51,274 INFO  L460      AbstractCegarLoop]: Interpolant automaton has 11 states
[2021-02-24 00:17:51,274 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2021-02-24 00:17:51,289 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2021-02-24 00:17:51,291 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110
[2021-02-24 00:17:51,293 INFO  L87              Difference]: Start difference. First operand 31 states. Second operand 11 states.
[2021-02-24 00:17:51,936 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-02-24 00:17:51,936 INFO  L93              Difference]: Finished difference Result 59 states and 70 transitions.
[2021-02-24 00:17:51,936 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2021-02-24 00:17:51,938 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 23
[2021-02-24 00:17:51,939 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-02-24 00:17:51,947 INFO  L225             Difference]: With dead ends: 59
[2021-02-24 00:17:51,947 INFO  L226             Difference]: Without dead ends: 37
[2021-02-24 00:17:51,951 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380
[2021-02-24 00:17:51,971 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 37 states.
[2021-02-24 00:17:51,999 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35.
[2021-02-24 00:17:52,001 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 35 states.
[2021-02-24 00:17:52,002 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions.
[2021-02-24 00:17:52,004 INFO  L78                 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 23
[2021-02-24 00:17:52,005 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-02-24 00:17:52,005 INFO  L480      AbstractCegarLoop]: Abstraction has 35 states and 35 transitions.
[2021-02-24 00:17:52,005 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2021-02-24 00:17:52,006 INFO  L276                IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions.
[2021-02-24 00:17:52,007 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 33
[2021-02-24 00:17:52,007 INFO  L414         BasicCegarLoop]: Found error trace
[2021-02-24 00:17:52,007 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-02-24 00:17:52,008 WARN  L517      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-02-24 00:17:52,008 INFO  L428      AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-24 00:17:52,009 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-02-24 00:17:52,009 INFO  L82        PathProgramCache]: Analyzing trace with hash -1740881698, now seen corresponding path program 1 times
[2021-02-24 00:17:52,009 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-02-24 00:17:52,010 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57485349]
[2021-02-24 00:17:52,010 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-24 00:17:52,064 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-24 00:17:52,195 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 00:17:52,196 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-24 00:17:52,196 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 00:17:52,197 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3
[2021-02-24 00:17:52,200 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 00:17:52,201 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7
[2021-02-24 00:17:52,208 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 00:17:52,209 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10
[2021-02-24 00:17:52,218 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 00:17:52,219 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13
[2021-02-24 00:17:52,230 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 00:17:52,231 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20
[2021-02-24 00:17:52,247 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 00:17:52,248 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21
[2021-02-24 00:17:52,265 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 00:17:52,266 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29
[2021-02-24 00:17:52,291 WARN  L141       QuantifierPusher]: treesize reduction 23, result has 84.1 percent of original size
[2021-02-24 00:17:52,294 WARN  L147       QuantifierPusher]: treesize reduction 23, result has 84.1 percent of original size 122
[2021-02-24 00:17:52,374 WARN  L141       QuantifierPusher]: treesize reduction 46, result has 82.4 percent of original size
[2021-02-24 00:17:52,380 WARN  L147       QuantifierPusher]: treesize reduction 46, result has 82.4 percent of original size 215
[2021-02-24 00:17:52,550 WARN  L202               SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35
[2021-02-24 00:17:52,553 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 00:17:52,553 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4
[2021-02-24 00:17:52,568 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 00:17:52,569 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4
[2021-02-24 00:17:52,586 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 00:17:52,587 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-24 00:17:52,626 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-02-24 00:17:52,631 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-24 00:17:52,639 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 00:17:52,640 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-24 00:17:52,640 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19
[2021-02-24 00:17:52,645 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-24 00:17:52,650 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 00:17:52,651 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-24 00:17:52,657 INFO  L134       CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-02-24 00:17:52,657 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57485349]
[2021-02-24 00:17:52,657 INFO  L219   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2021-02-24 00:17:52,658 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14
[2021-02-24 00:17:52,658 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630169061]
[2021-02-24 00:17:52,659 INFO  L460      AbstractCegarLoop]: Interpolant automaton has 14 states
[2021-02-24 00:17:52,660 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2021-02-24 00:17:52,661 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2021-02-24 00:17:52,661 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182
[2021-02-24 00:17:52,661 INFO  L87              Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 14 states.
[2021-02-24 00:17:53,432 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-02-24 00:17:53,432 INFO  L93              Difference]: Finished difference Result 48 states and 48 transitions.
[2021-02-24 00:17:53,433 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. 
[2021-02-24 00:17:53,433 INFO  L78                 Accepts]: Start accepts. Automaton has 14 states. Word has length 32
[2021-02-24 00:17:53,434 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-02-24 00:17:53,435 INFO  L225             Difference]: With dead ends: 48
[2021-02-24 00:17:53,435 INFO  L226             Difference]: Without dead ends: 46
[2021-02-24 00:17:53,437 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650
[2021-02-24 00:17:53,437 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 46 states.
[2021-02-24 00:17:53,453 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44.
[2021-02-24 00:17:53,453 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 44 states.
[2021-02-24 00:17:53,455 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions.
[2021-02-24 00:17:53,455 INFO  L78                 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 32
[2021-02-24 00:17:53,456 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-02-24 00:17:53,456 INFO  L480      AbstractCegarLoop]: Abstraction has 44 states and 44 transitions.
[2021-02-24 00:17:53,456 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 14 states.
[2021-02-24 00:17:53,456 INFO  L276                IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions.
[2021-02-24 00:17:53,457 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 42
[2021-02-24 00:17:53,458 INFO  L414         BasicCegarLoop]: Found error trace
[2021-02-24 00:17:53,458 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-02-24 00:17:53,458 WARN  L517      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-02-24 00:17:53,458 INFO  L428      AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-24 00:17:53,459 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-02-24 00:17:53,459 INFO  L82        PathProgramCache]: Analyzing trace with hash -1811489431, now seen corresponding path program 2 times
[2021-02-24 00:17:53,459 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-02-24 00:17:53,460 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771440485]
[2021-02-24 00:17:53,460 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-24 00:17:53,491 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-24 00:17:53,602 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 00:17:53,603 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-24 00:17:53,603 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 00:17:53,604 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3
[2021-02-24 00:17:53,607 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 00:17:53,608 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7
[2021-02-24 00:17:53,615 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 00:17:53,615 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10
[2021-02-24 00:17:53,625 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 00:17:53,627 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13
[2021-02-24 00:17:53,640 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 00:17:53,641 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20
[2021-02-24 00:17:53,658 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 00:17:53,660 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21
[2021-02-24 00:17:53,679 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 00:17:53,680 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29
[2021-02-24 00:17:53,698 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 00:17:53,703 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25
[2021-02-24 00:17:53,722 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 00:17:53,724 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21
[2021-02-24 00:17:53,726 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 00:17:53,727 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29
[2021-02-24 00:17:53,733 WARN  L141       QuantifierPusher]: treesize reduction 4, result has 97.2 percent of original size
[2021-02-24 00:17:53,738 WARN  L147       QuantifierPusher]: treesize reduction 4, result has 97.2 percent of original size 141
[2021-02-24 00:17:53,823 WARN  L141       QuantifierPusher]: treesize reduction 27, result has 89.7 percent of original size
[2021-02-24 00:17:53,828 WARN  L147       QuantifierPusher]: treesize reduction 27, result has 89.7 percent of original size 234
[2021-02-24 00:17:53,987 WARN  L202               SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 35
[2021-02-24 00:17:53,990 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 00:17:53,990 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4
[2021-02-24 00:17:54,004 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 00:17:54,005 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4
[2021-02-24 00:17:54,019 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 00:17:54,020 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-24 00:17:54,056 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-02-24 00:17:54,059 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-24 00:17:54,065 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 00:17:54,065 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-24 00:17:54,066 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19
[2021-02-24 00:17:54,070 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-24 00:17:54,074 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 00:17:54,074 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-24 00:17:54,075 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28
[2021-02-24 00:17:54,077 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-24 00:17:54,081 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 00:17:54,082 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-24 00:17:54,090 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked.
[2021-02-24 00:17:54,090 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771440485]
[2021-02-24 00:17:54,091 INFO  L219   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2021-02-24 00:17:54,091 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15
[2021-02-24 00:17:54,091 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004584186]
[2021-02-24 00:17:54,092 INFO  L460      AbstractCegarLoop]: Interpolant automaton has 15 states
[2021-02-24 00:17:54,092 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2021-02-24 00:17:54,093 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2021-02-24 00:17:54,093 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210
[2021-02-24 00:17:54,093 INFO  L87              Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 15 states.
[2021-02-24 00:17:54,645 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-02-24 00:17:54,645 INFO  L93              Difference]: Finished difference Result 44 states and 44 transitions.
[2021-02-24 00:17:54,646 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2021-02-24 00:17:54,646 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states. Word has length 41
[2021-02-24 00:17:54,647 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-02-24 00:17:54,647 INFO  L225             Difference]: With dead ends: 44
[2021-02-24 00:17:54,647 INFO  L226             Difference]: Without dead ends: 0
[2021-02-24 00:17:54,648 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600
[2021-02-24 00:17:54,648 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2021-02-24 00:17:54,649 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2021-02-24 00:17:54,649 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 0 states.
[2021-02-24 00:17:54,649 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2021-02-24 00:17:54,649 INFO  L78                 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41
[2021-02-24 00:17:54,649 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-02-24 00:17:54,650 INFO  L480      AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2021-02-24 00:17:54,650 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 15 states.
[2021-02-24 00:17:54,650 INFO  L276                IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2021-02-24 00:17:54,650 INFO  L282                IsEmpty]: Finished isEmpty. No accepting run.
[2021-02-24 00:17:54,650 WARN  L517      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2021-02-24 00:17:54,652 INFO  L343    DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.
[2021-02-24 00:17:55,151 INFO  L189         CegarLoopUtils]: For program point  reach_errorEXIT(line 6)  no Hoare annotation was computed.
[2021-02-24 00:17:55,152 INFO  L189         CegarLoopUtils]: For program point  reach_errorENTRY(line 6)  no Hoare annotation was computed.
[2021-02-24 00:17:55,152 INFO  L189         CegarLoopUtils]: For program point  reach_errorFINAL(line 6)  no Hoare annotation was computed.
[2021-02-24 00:17:55,152 INFO  L192         CegarLoopUtils]: At program point  L-1(line -1)  the Hoare annotation is:  true
[2021-02-24 00:17:55,152 INFO  L192         CegarLoopUtils]: At program point  L-1-1(line -1)  the Hoare annotation is:  true
[2021-02-24 00:17:55,153 INFO  L192         CegarLoopUtils]: At program point  ULTIMATE.initFINAL(line 6)  the Hoare annotation is:  true
[2021-02-24 00:17:55,153 INFO  L185         CegarLoopUtils]: At program point  ULTIMATE.initENTRY(line -1)  the Hoare annotation is:  (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|))
[2021-02-24 00:17:55,153 INFO  L192         CegarLoopUtils]: At program point  L6(line 6)  the Hoare annotation is:  true
[2021-02-24 00:17:55,153 INFO  L192         CegarLoopUtils]: At program point  L6-1(line 6)  the Hoare annotation is:  true
[2021-02-24 00:17:55,153 INFO  L192         CegarLoopUtils]: At program point  L6-2(line 6)  the Hoare annotation is:  true
[2021-02-24 00:17:55,153 INFO  L192         CegarLoopUtils]: At program point  L6-3(line 6)  the Hoare annotation is:  true
[2021-02-24 00:17:55,154 INFO  L192         CegarLoopUtils]: At program point  L6-4(line 6)  the Hoare annotation is:  true
[2021-02-24 00:17:55,154 INFO  L192         CegarLoopUtils]: At program point  ULTIMATE.initEXIT(line -1)  the Hoare annotation is:  true
[2021-02-24 00:17:55,154 INFO  L192         CegarLoopUtils]: At program point  ULTIMATE.startEXIT(line -1)  the Hoare annotation is:  true
[2021-02-24 00:17:55,154 INFO  L192         CegarLoopUtils]: At program point  L-1(line -1)  the Hoare annotation is:  true
[2021-02-24 00:17:55,154 INFO  L192         CegarLoopUtils]: At program point  ULTIMATE.startENTRY(line -1)  the Hoare annotation is:  true
[2021-02-24 00:17:55,154 INFO  L192         CegarLoopUtils]: At program point  ULTIMATE.startFINAL(line -1)  the Hoare annotation is:  true
[2021-02-24 00:17:55,155 INFO  L192         CegarLoopUtils]: At program point  mainENTRY(lines 15 28)  the Hoare annotation is:  true
[2021-02-24 00:17:55,155 INFO  L185         CegarLoopUtils]: At program point  L25(line 25)  the Hoare annotation is:  (let ((.cse0 (* 2 main_~i~0)) (.cse1 (* 3 main_~i~0))) (and (<= .cse0 main_~j~0) (<= main_~j~0 .cse0) (<= .cse1 main_~k~0) (<= main_~k~0 .cse1)))
[2021-02-24 00:17:55,155 INFO  L192         CegarLoopUtils]: At program point  mainEXIT(lines 15 28)  the Hoare annotation is:  true
[2021-02-24 00:17:55,155 INFO  L185         CegarLoopUtils]: At program point  L24(line 24)  the Hoare annotation is:  (let ((.cse1 (* 3 main_~i~0)) (.cse0 (+ main_~k~0 3)) (.cse2 (* 2 main_~i~0))) (and (<= .cse0 .cse1) (<= .cse2 main_~j~0) (<= .cse1 .cse0) (<= main_~j~0 .cse2)))
[2021-02-24 00:17:55,155 INFO  L185         CegarLoopUtils]: At program point  L25-1(lines 21 26)  the Hoare annotation is:  (let ((.cse0 (* 2 main_~i~0)) (.cse1 (* 3 main_~i~0))) (and (<= .cse0 main_~j~0) (<= main_~j~0 .cse0) (<= .cse1 main_~k~0) (<= main_~k~0 .cse1)))
[2021-02-24 00:17:55,156 INFO  L185         CegarLoopUtils]: At program point  L23(line 23)  the Hoare annotation is:  (let ((.cse1 (* 3 main_~i~0)) (.cse0 (+ main_~k~0 3)) (.cse3 (* 2 main_~i~0)) (.cse2 (+ main_~j~0 2))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (<= .cse2 .cse3) (<= .cse3 .cse2)))
[2021-02-24 00:17:55,156 INFO  L185         CegarLoopUtils]: At program point  L22(line 22)  the Hoare annotation is:  (let ((.cse0 (* 2 main_~i~0)) (.cse1 (* 3 main_~i~0))) (and (<= .cse0 main_~j~0) (<= main_~j~0 .cse0) (<= .cse1 main_~k~0) (<= main_~k~0 .cse1)))
[2021-02-24 00:17:55,156 INFO  L185         CegarLoopUtils]: At program point  L19(line 19)  the Hoare annotation is:  (and (= main_~i~0 0) (= main_~j~0 0))
[2021-02-24 00:17:55,156 INFO  L192         CegarLoopUtils]: At program point  L21-2(lines 15 28)  the Hoare annotation is:  true
[2021-02-24 00:17:55,156 INFO  L185         CegarLoopUtils]: At program point  L18(line 18)  the Hoare annotation is:  (= main_~i~0 0)
[2021-02-24 00:17:55,156 INFO  L192         CegarLoopUtils]: At program point  __VERIFIER_assertENTRY(lines 7 13)  the Hoare annotation is:  true
[2021-02-24 00:17:55,157 INFO  L185         CegarLoopUtils]: At program point  L10(line 10)  the Hoare annotation is:  (= |__VERIFIER_assert_#in~cond| 0)
[2021-02-24 00:17:55,157 INFO  L185         CegarLoopUtils]: At program point  __VERIFIER_assertEXIT(lines 7 13)  the Hoare annotation is:  (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0)))
[2021-02-24 00:17:55,157 INFO  L185         CegarLoopUtils]: At program point  L9(lines 9 11)  the Hoare annotation is:  (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0)))
[2021-02-24 00:17:55,157 INFO  L185         CegarLoopUtils]: At program point  L10-1(line 10)  the Hoare annotation is:  (= |__VERIFIER_assert_#in~cond| 0)
[2021-02-24 00:17:55,157 INFO  L185         CegarLoopUtils]: At program point  L9-2(lines 7 13)  the Hoare annotation is:  (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0)))
[2021-02-24 00:17:55,158 INFO  L185         CegarLoopUtils]: At program point  __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 10)  the Hoare annotation is:  (= |__VERIFIER_assert_#in~cond| 0)
[2021-02-24 00:17:55,176 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:17:55 BoogieIcfgContainer
[2021-02-24 00:17:55,176 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2021-02-24 00:17:55,178 INFO  L168              Benchmark]: Toolchain (without parser) took 6051.26 ms. Allocated memory was 159.4 MB in the beginning and 205.5 MB in the end (delta: 46.1 MB). Free memory was 135.9 MB in the beginning and 164.2 MB in the end (delta: -28.3 MB). Peak memory consumption was 112.2 MB. Max. memory is 8.0 GB.
[2021-02-24 00:17:55,178 INFO  L168              Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 159.4 MB. Free memory is still 133.4 MB. There was no memory consumed. Max. memory is 8.0 GB.
[2021-02-24 00:17:55,179 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 328.71 ms. Allocated memory is still 159.4 MB. Free memory was 134.8 MB in the beginning and 125.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB.
[2021-02-24 00:17:55,180 INFO  L168              Benchmark]: Boogie Preprocessor took 34.96 ms. Allocated memory is still 159.4 MB. Free memory was 125.6 MB in the beginning and 124.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB.
[2021-02-24 00:17:55,181 INFO  L168              Benchmark]: RCFGBuilder took 360.92 ms. Allocated memory is still 159.4 MB. Free memory was 124.1 MB in the beginning and 111.1 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB.
[2021-02-24 00:17:55,182 INFO  L168              Benchmark]: TraceAbstraction took 5280.13 ms. Allocated memory was 159.4 MB in the beginning and 205.5 MB in the end (delta: 46.1 MB). Free memory was 142.8 MB in the beginning and 164.2 MB in the end (delta: -21.3 MB). Peak memory consumption was 117.6 MB. Max. memory is 8.0 GB.
[2021-02-24 00:17:55,185 INFO  L339   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.20 ms. Allocated memory is still 159.4 MB. Free memory is still 133.4 MB. There was no memory consumed. Max. memory is 8.0 GB.
 * CACSL2BoogieTranslator took 328.71 ms. Allocated memory is still 159.4 MB. Free memory was 134.8 MB in the beginning and 125.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB.
 * Boogie Preprocessor took 34.96 ms. Allocated memory is still 159.4 MB. Free memory was 125.6 MB in the beginning and 124.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB.
 * RCFGBuilder took 360.92 ms. Allocated memory is still 159.4 MB. Free memory was 124.1 MB in the beginning and 111.1 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB.
 * TraceAbstraction took 5280.13 ms. Allocated memory was 159.4 MB in the beginning and 205.5 MB in the end (delta: 46.1 MB). Free memory was 142.8 MB in the beginning and 164.2 MB in the end (delta: -21.3 MB). Peak memory consumption was 117.6 MB. Max. memory is 8.0 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - PositiveResult [Line: 10]: call to reach_error is unreachable
    For all program executions holds that call to reach_error is unreachable at this location
  - AllSpecificationsHoldResult: All specifications hold
    1 specifications checked. All of them hold
  - InvariantResult [Line: 21]: Loop Invariant
    Derived loop invariant: ((2 * i <= j && j <= 2 * i) && 3 * i <= k) && k <= 3 * i
  - ProcedureContractResult [Line: 15]: Procedure Contract for main
    Derived contract for procedure main: 1
  - ProcedureContractResult [Line: 7]: Procedure Contract for __VERIFIER_assert
    Derived contract for procedure __VERIFIER_assert: \old(cond) == 0 || !(cond == 0)
  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.6s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 58 SDtfs, 88 SDslu, 372 SDs, 0 SdLazy, 382 SolverSat, 40 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=2, 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, 3 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 31 LocationsWithAnnotation, 52 PreInvPairs, 77 NumberOfFragments, 208 HoareAnnotationTreeSize, 52 FomulaSimplifications, 1856 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 31 FomulaSimplificationsInter, 671 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 96 NumberOfCodeBlocks, 96 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 93 ConstructedInterpolants, 0 QuantifiedInterpolants, 36588 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 14/30 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
RESULT: Ultimate proved your program to be correct!
Received shutdown request...