/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/array-fpi/modnf.c


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


This is Ultimate 0.2.1-dev-36cd7be
[2021-02-24 04:46:32,997 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2021-02-24 04:46:33,000 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2021-02-24 04:46:33,036 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-02-24 04:46:33,036 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-02-24 04:46:33,038 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
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[2021-02-24 04:46:33,054 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-02-24 04:46:33,055 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-02-24 04:46:33,057 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-02-24 04:46:33,059 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-02-24 04:46:33,061 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2021-02-24 04:46:33,063 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-02-24 04:46:33,065 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-02-24 04:46:33,067 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2021-02-24 04:46:33,068 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2021-02-24 04:46:33,071 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2021-02-24 04:46:33,072 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
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[2021-02-24 04:46:33,098 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2021-02-24 04:46:33,100 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2021-02-24 04:46:33,102 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf
[2021-02-24 04:46:33,114 INFO  L113        SettingsManager]: Loading preferences was successful
[2021-02-24 04:46:33,115 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2021-02-24 04:46:33,116 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-02-24 04:46:33,117 INFO  L138        SettingsManager]:  * sizeof long=4
[2021-02-24 04:46:33,117 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2021-02-24 04:46:33,117 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2021-02-24 04:46:33,117 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2021-02-24 04:46:33,118 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2021-02-24 04:46:33,118 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-02-24 04:46:33,118 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2021-02-24 04:46:33,118 INFO  L138        SettingsManager]:  * sizeof long double=12
[2021-02-24 04:46:33,118 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2021-02-24 04:46:33,119 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2021-02-24 04:46:33,119 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2021-02-24 04:46:33,119 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-02-24 04:46:33,119 INFO  L138        SettingsManager]:  * Size of a code block=SingleStatement
[2021-02-24 04:46:33,120 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2021-02-24 04:46:33,120 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2021-02-24 04:46:33,120 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-02-24 04:46:33,120 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-02-24 04:46:33,120 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=AcceleratedInterpolation
[2021-02-24 04:46:33,121 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-02-24 04:46:33,121 INFO  L138        SettingsManager]:  * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX
[2021-02-24 04:46:33,121 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2021-02-24 04:46:33,530 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2021-02-24 04:46:33,558 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-02-24 04:46:33,561 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-02-24 04:46:33,563 INFO  L271        PluginConnector]: Initializing CDTParser...
[2021-02-24 04:46:33,563 INFO  L275        PluginConnector]: CDTParser initialized
[2021-02-24 04:46:33,564 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/modnf.c
[2021-02-24 04:46:33,656 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab1542899/6a67904c5b8a409bab04cb1db45b004d/FLAG623f748c9
[2021-02-24 04:46:34,350 INFO  L306              CDTParser]: Found 1 translation units.
[2021-02-24 04:46:34,351 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/modnf.c
[2021-02-24 04:46:34,358 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab1542899/6a67904c5b8a409bab04cb1db45b004d/FLAG623f748c9
[2021-02-24 04:46:34,722 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab1542899/6a67904c5b8a409bab04cb1db45b004d
[2021-02-24 04:46:34,728 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-02-24 04:46:34,740 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2021-02-24 04:46:34,742 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-02-24 04:46:34,742 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-02-24 04:46:34,747 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2021-02-24 04:46:34,748 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:46:34" (1/1) ...
[2021-02-24 04:46:34,749 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11ea6ed4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:34, skipping insertion in model container
[2021-02-24 04:46:34,749 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:46:34" (1/1) ...
[2021-02-24 04:46:34,759 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2021-02-24 04:46:34,775 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2021-02-24 04:46:34,936 WARN  L226   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/modnf.c[588,601]
[2021-02-24 04:46:34,958 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2021-02-24 04:46:34,969 INFO  L203         MainTranslator]: Completed pre-run
[2021-02-24 04:46:34,985 WARN  L226   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/modnf.c[588,601]
[2021-02-24 04:46:34,995 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2021-02-24 04:46:35,014 INFO  L208         MainTranslator]: Completed translation
[2021-02-24 04:46:35,014 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:35 WrapperNode
[2021-02-24 04:46:35,015 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-02-24 04:46:35,016 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-02-24 04:46:35,016 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2021-02-24 04:46:35,016 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2021-02-24 04:46:35,033 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:35" (1/1) ...
[2021-02-24 04:46:35,033 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:35" (1/1) ...
[2021-02-24 04:46:35,054 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:35" (1/1) ...
[2021-02-24 04:46:35,055 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:35" (1/1) ...
[2021-02-24 04:46:35,078 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:35" (1/1) ...
[2021-02-24 04:46:35,089 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:35" (1/1) ...
[2021-02-24 04:46:35,098 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:35" (1/1) ...
[2021-02-24 04:46:35,105 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-02-24 04:46:35,109 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-02-24 04:46:35,110 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2021-02-24 04:46:35,110 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2021-02-24 04:46:35,113 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:35" (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 04:46:35,263 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2021-02-24 04:46:35,263 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-02-24 04:46:35,264 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2021-02-24 04:46:35,264 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2021-02-24 04:46:35,264 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2021-02-24 04:46:35,264 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2021-02-24 04:46:35,265 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2021-02-24 04:46:35,265 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2021-02-24 04:46:35,265 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2021-02-24 04:46:35,266 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-02-24 04:46:35,266 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2021-02-24 04:46:35,266 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2021-02-24 04:46:35,267 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2021-02-24 04:46:35,267 INFO  L130     BoogieDeclarations]: Found specification of procedure malloc
[2021-02-24 04:46:35,267 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2021-02-24 04:46:35,268 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2021-02-24 04:46:35,268 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2021-02-24 04:46:35,269 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2021-02-24 04:46:35,269 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2021-02-24 04:46:35,270 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2021-02-24 04:46:35,271 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2021-02-24 04:46:35,272 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-02-24 04:46:35,838 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-02-24 04:46:35,838 INFO  L299             CfgBuilder]: Removed 3 assume(true) statements.
[2021-02-24 04:46:35,840 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:46:35 BoogieIcfgContainer
[2021-02-24 04:46:35,840 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-02-24 04:46:35,842 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-02-24 04:46:35,842 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2021-02-24 04:46:35,846 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2021-02-24 04:46:35,846 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:46:34" (1/3) ...
[2021-02-24 04:46:35,847 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@564f18d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:46:35, skipping insertion in model container
[2021-02-24 04:46:35,848 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:35" (2/3) ...
[2021-02-24 04:46:35,848 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@564f18d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:46:35, skipping insertion in model container
[2021-02-24 04:46:35,848 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:46:35" (3/3) ...
[2021-02-24 04:46:35,850 INFO  L111   eAbstractionObserver]: Analyzing ICFG modnf.c
[2021-02-24 04:46:35,858 INFO  L153   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION
[2021-02-24 04:46:35,865 INFO  L165   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2021-02-24 04:46:35,902 INFO  L253      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-02-24 04:46:35,935 INFO  L376      AbstractCegarLoop]: Interprodecural is true
[2021-02-24 04:46:35,935 INFO  L377      AbstractCegarLoop]: Hoare is true
[2021-02-24 04:46:35,935 INFO  L378      AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation
[2021-02-24 04:46:35,935 INFO  L379      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2021-02-24 04:46:35,935 INFO  L380      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2021-02-24 04:46:35,936 INFO  L381      AbstractCegarLoop]: Difference is false
[2021-02-24 04:46:35,936 INFO  L382      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2021-02-24 04:46:35,936 INFO  L386      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2021-02-24 04:46:35,955 INFO  L276                IsEmpty]: Start isEmpty. Operand 67 states.
[2021-02-24 04:46:35,968 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 39
[2021-02-24 04:46:35,968 INFO  L414         BasicCegarLoop]: Found error trace
[2021-02-24 04:46:35,969 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-02-24 04:46:35,970 INFO  L428      AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-24 04:46:35,976 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-02-24 04:46:35,977 INFO  L82        PathProgramCache]: Analyzing trace with hash -774145788, now seen corresponding path program 1 times
[2021-02-24 04:46:35,987 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-02-24 04:46:35,987 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240099589]
[2021-02-24 04:46:35,988 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-24 04:46:36,073 INFO  L218   tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-02-24 04:46:36,148 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-24 04:46:36,231 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 04:46:36,233 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-24 04:46:36,235 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 04:46:36,236 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-24 04:46:36,341 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-02-24 04:46:36,364 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-24 04:46:36,397 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 04:46:36,400 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-24 04:46:36,404 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17
[2021-02-24 04:46:36,406 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-24 04:46:36,416 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 04:46:36,418 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-24 04:46:36,432 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 04:46:36,434 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240099589]
[2021-02-24 04:46:36,437 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-02-24 04:46:36,438 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-02-24 04:46:36,438 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429703547]
[2021-02-24 04:46:36,443 INFO  L460      AbstractCegarLoop]: Interpolant automaton has 3 states
[2021-02-24 04:46:36,444 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2021-02-24 04:46:36,459 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-02-24 04:46:36,460 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-02-24 04:46:36,463 INFO  L87              Difference]: Start difference. First operand 67 states. Second operand 3 states.
[2021-02-24 04:46:36,627 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-02-24 04:46:36,628 INFO  L93              Difference]: Finished difference Result 111 states and 126 transitions.
[2021-02-24 04:46:36,628 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-02-24 04:46:36,630 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 38
[2021-02-24 04:46:36,631 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-02-24 04:46:36,639 INFO  L225             Difference]: With dead ends: 111
[2021-02-24 04:46:36,640 INFO  L226             Difference]: Without dead ends: 57
[2021-02-24 04:46:36,644 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-02-24 04:46:36,664 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 57 states.
[2021-02-24 04:46:36,706 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57.
[2021-02-24 04:46:36,708 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 57 states.
[2021-02-24 04:46:36,710 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions.
[2021-02-24 04:46:36,712 INFO  L78                 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 38
[2021-02-24 04:46:36,713 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-02-24 04:46:36,713 INFO  L480      AbstractCegarLoop]: Abstraction has 57 states and 59 transitions.
[2021-02-24 04:46:36,714 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2021-02-24 04:46:36,714 INFO  L276                IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions.
[2021-02-24 04:46:36,715 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 39
[2021-02-24 04:46:36,716 INFO  L414         BasicCegarLoop]: Found error trace
[2021-02-24 04:46:36,716 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-02-24 04:46:36,716 WARN  L517      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-02-24 04:46:36,717 INFO  L428      AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-24 04:46:36,717 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-02-24 04:46:36,718 INFO  L82        PathProgramCache]: Analyzing trace with hash 1387502767, now seen corresponding path program 1 times
[2021-02-24 04:46:36,718 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-02-24 04:46:36,718 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819717101]
[2021-02-24 04:46:36,719 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-24 04:46:36,722 INFO  L218   tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-02-24 04:46:36,754 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-24 04:46:36,792 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 04:46:36,792 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-24 04:46:36,793 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 04:46:36,794 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3
[2021-02-24 04:46:36,808 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 04:46:36,809 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7
[2021-02-24 04:46:36,818 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 04:46:36,819 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-24 04:46:36,848 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-02-24 04:46:36,852 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-24 04:46:36,863 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 04:46:36,864 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-24 04:46:36,865 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17
[2021-02-24 04:46:36,868 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-24 04:46:36,872 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 04:46:36,873 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-24 04:46:36,877 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 04:46:36,878 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819717101]
[2021-02-24 04:46:36,878 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-02-24 04:46:36,879 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2021-02-24 04:46:36,879 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766465940]
[2021-02-24 04:46:36,880 INFO  L460      AbstractCegarLoop]: Interpolant automaton has 5 states
[2021-02-24 04:46:36,880 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2021-02-24 04:46:36,881 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2021-02-24 04:46:36,882 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2021-02-24 04:46:36,882 INFO  L87              Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 5 states.
[2021-02-24 04:46:37,110 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-02-24 04:46:37,111 INFO  L93              Difference]: Finished difference Result 97 states and 103 transitions.
[2021-02-24 04:46:37,111 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2021-02-24 04:46:37,111 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 38
[2021-02-24 04:46:37,112 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-02-24 04:46:37,123 INFO  L225             Difference]: With dead ends: 97
[2021-02-24 04:46:37,123 INFO  L226             Difference]: Without dead ends: 75
[2021-02-24 04:46:37,125 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2021-02-24 04:46:37,126 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 75 states.
[2021-02-24 04:46:37,161 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59.
[2021-02-24 04:46:37,161 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 59 states.
[2021-02-24 04:46:37,163 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions.
[2021-02-24 04:46:37,163 INFO  L78                 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 38
[2021-02-24 04:46:37,164 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-02-24 04:46:37,167 INFO  L480      AbstractCegarLoop]: Abstraction has 59 states and 61 transitions.
[2021-02-24 04:46:37,167 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2021-02-24 04:46:37,168 INFO  L276                IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions.
[2021-02-24 04:46:37,169 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 53
[2021-02-24 04:46:37,170 INFO  L414         BasicCegarLoop]: Found error trace
[2021-02-24 04:46:37,170 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-02-24 04:46:37,170 WARN  L517      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-02-24 04:46:37,170 INFO  L428      AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-24 04:46:37,171 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-02-24 04:46:37,171 INFO  L82        PathProgramCache]: Analyzing trace with hash 388403656, now seen corresponding path program 1 times
[2021-02-24 04:46:37,171 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-02-24 04:46:37,172 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528494063]
[2021-02-24 04:46:37,175 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-24 04:46:37,207 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 04:46:37,221 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27
[2021-02-24 04:46:37,227 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 04:46:37,230 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27
[2021-02-24 04:46:37,238 WARN  L141       QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size
[2021-02-24 04:46:37,253 WARN  L147       QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size 13
[2021-02-24 04:46:37,258 WARN  L141       QuantifierPusher]: treesize reduction 17, result has 63.8 percent of original size
[2021-02-24 04:46:37,261 WARN  L147       QuantifierPusher]: treesize reduction 17, result has 63.8 percent of original size 30
[2021-02-24 04:46:37,262 INFO  L206   tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE
[2021-02-24 04:46:37,288 WARN  L167   FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility
[2021-02-24 04:46:37,288 INFO  L523         BasicCegarLoop]: Counterexample might be feasible
[2021-02-24 04:46:37,293 WARN  L517      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2021-02-24 04:46:37,313 WARN  L227   ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually.
[2021-02-24 04:46:37,314 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:46:37 BoogieIcfgContainer
[2021-02-24 04:46:37,314 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2021-02-24 04:46:37,316 INFO  L168              Benchmark]: Toolchain (without parser) took 2585.25 ms. Allocated memory is still 151.0 MB. Free memory was 128.0 MB in the beginning and 105.6 MB in the end (delta: 22.4 MB). Peak memory consumption was 22.8 MB. Max. memory is 8.0 GB.
[2021-02-24 04:46:37,316 INFO  L168              Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 127.0 MB. There was no memory consumed. Max. memory is 8.0 GB.
[2021-02-24 04:46:37,317 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 272.97 ms. Allocated memory is still 151.0 MB. Free memory was 126.9 MB in the beginning and 117.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB.
[2021-02-24 04:46:37,318 INFO  L168              Benchmark]: Boogie Preprocessor took 89.12 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 115.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB.
[2021-02-24 04:46:37,319 INFO  L168              Benchmark]: RCFGBuilder took 731.09 ms. Allocated memory is still 151.0 MB. Free memory was 115.2 MB in the beginning and 133.9 MB in the end (delta: -18.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 8.0 GB.
[2021-02-24 04:46:37,320 INFO  L168              Benchmark]: TraceAbstraction took 1471.98 ms. Allocated memory is still 151.0 MB. Free memory was 133.4 MB in the beginning and 105.6 MB in the end (delta: 27.8 MB). Peak memory consumption was 27.3 MB. Max. memory is 8.0 GB.
[2021-02-24 04:46:37,323 INFO  L339   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 127.0 MB. There was no memory consumed. Max. memory is 8.0 GB.
 * CACSL2BoogieTranslator took 272.97 ms. Allocated memory is still 151.0 MB. Free memory was 126.9 MB in the beginning and 117.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB.
 * Boogie Preprocessor took 89.12 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 115.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB.
 * RCFGBuilder took 731.09 ms. Allocated memory is still 151.0 MB. Free memory was 115.2 MB in the beginning and 133.9 MB in the end (delta: -18.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 8.0 GB.
 * TraceAbstraction took 1471.98 ms. Allocated memory is still 151.0 MB. Free memory was 133.4 MB in the beginning and 105.6 MB in the end (delta: 27.8 MB). Peak memory consumption was 27.3 MB. Max. memory is 8.0 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable
    Unable to prove that call to reach_error is unreachable
 Reason: unable to decide satisfiability of path constraint. 
Possible FailurePath: 
[L19]              int N;
[L23]              N = __VERIFIER_nondet_int()
[L24]  COND FALSE  !(N <= 0)
[L25]  CALL        assume_abort_if_not(N <= 2147483647/sizeof(int))
[L13]  COND FALSE  !(!cond)
[L25]  RET         assume_abort_if_not(N <= 2147483647/sizeof(int))
[L27]              int i;
[L28]              int sum[1];
[L29]              int *a = malloc(sizeof(int)*N);
[L31]              sum[0] = 0
[L32]              i=0
[L32]  COND TRUE   i<N
[L34]  EXPR        sum[0]
[L34]              sum[0] = sum[0] + 1
[L32]              i++
[L32]  COND FALSE  !(i<N)
[L37]              i=0
[L37]  COND TRUE   i<N
[L39]  EXPR        sum[0]
[L39]              a[i] = sum[0] % N
[L37]              i++
[L37]  COND FALSE  !(i<N)
[L42]              i=0
[L42]  COND TRUE   i<N
[L44]  EXPR        a[i]
[L44]  CALL        __VERIFIER_assert(a[i] == 1)
[L15]  COND TRUE   !(cond)
[L15]              reach_error()

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 6 procedures, 70 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 1.3s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 115 SDtfs, 85 SDslu, 33 SDs, 0 SdLazy, 139 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=0, 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, 2 MinimizatonAttempts, 16 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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 could not prove your program: unable to determine feasibility of some traces
Received shutdown request...