/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/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/terminator_01.c


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


This is Ultimate 0.2.1-dev-b7b32d2
[2021-02-21 21:17:54,891 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2021-02-21 21:17:54,896 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2021-02-21 21:17:55,027 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-02-21 21:17:55,029 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-02-21 21:17:55,036 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-02-21 21:17:55,038 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2021-02-21 21:17:55,043 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-02-21 21:17:55,045 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-02-21 21:17:55,046 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2021-02-21 21:17:55,048 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
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[2021-02-21 21:17:55,071 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2021-02-21 21:17:55,073 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2021-02-21 21:17:55,074 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf
[2021-02-21 21:17:55,096 INFO  L113        SettingsManager]: Loading preferences was successful
[2021-02-21 21:17:55,097 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2021-02-21 21:17:55,102 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-02-21 21:17:55,102 INFO  L138        SettingsManager]:  * sizeof long=4
[2021-02-21 21:17:55,102 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2021-02-21 21:17:55,102 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2021-02-21 21:17:55,103 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2021-02-21 21:17:55,103 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2021-02-21 21:17:55,103 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-02-21 21:17:55,103 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2021-02-21 21:17:55,104 INFO  L138        SettingsManager]:  * sizeof long double=12
[2021-02-21 21:17:55,105 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2021-02-21 21:17:55,105 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2021-02-21 21:17:55,105 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2021-02-21 21:17:55,106 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-02-21 21:17:55,106 INFO  L138        SettingsManager]:  * Size of a code block=SingleStatement
[2021-02-21 21:17:55,106 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2021-02-21 21:17:55,106 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2021-02-21 21:17:55,106 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-02-21 21:17:55,107 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-02-21 21:17:55,107 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=AcceleratedInterpolation
[2021-02-21 21:17:55,107 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-02-21 21:17:55,107 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2021-02-21 21:17:55,524 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2021-02-21 21:17:55,549 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-02-21 21:17:55,552 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-02-21 21:17:55,553 INFO  L271        PluginConnector]: Initializing CDTParser...
[2021-02-21 21:17:55,554 INFO  L275        PluginConnector]: CDTParser initialized
[2021-02-21 21:17:55,555 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/terminator_01.c
[2021-02-21 21:17:55,627 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc8c6db9e/725a58408427469989640c1257c7048e/FLAG53ff942aa
[2021-02-21 21:17:56,184 INFO  L306              CDTParser]: Found 1 translation units.
[2021-02-21 21:17:56,185 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/terminator_01.c
[2021-02-21 21:17:56,191 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc8c6db9e/725a58408427469989640c1257c7048e/FLAG53ff942aa
[2021-02-21 21:17:56,541 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc8c6db9e/725a58408427469989640c1257c7048e
[2021-02-21 21:17:56,544 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-02-21 21:17:56,557 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2021-02-21 21:17:56,559 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-02-21 21:17:56,559 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-02-21 21:17:56,563 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2021-02-21 21:17:56,564 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:17:56" (1/1) ...
[2021-02-21 21:17:56,565 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c432737 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:56, skipping insertion in model container
[2021-02-21 21:17:56,565 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:17:56" (1/1) ...
[2021-02-21 21:17:56,573 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2021-02-21 21:17:56,587 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2021-02-21 21:17:56,753 WARN  L226   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/terminator_01.c[325,338]
[2021-02-21 21:17:56,768 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2021-02-21 21:17:56,778 INFO  L203         MainTranslator]: Completed pre-run
[2021-02-21 21:17:56,791 WARN  L226   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/terminator_01.c[325,338]
[2021-02-21 21:17:56,794 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2021-02-21 21:17:56,811 INFO  L208         MainTranslator]: Completed translation
[2021-02-21 21:17:56,812 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:56 WrapperNode
[2021-02-21 21:17:56,812 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-02-21 21:17:56,813 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-02-21 21:17:56,813 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2021-02-21 21:17:56,814 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2021-02-21 21:17:56,827 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:56" (1/1) ...
[2021-02-21 21:17:56,830 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:56" (1/1) ...
[2021-02-21 21:17:56,838 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:56" (1/1) ...
[2021-02-21 21:17:56,838 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:56" (1/1) ...
[2021-02-21 21:17:56,845 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:56" (1/1) ...
[2021-02-21 21:17:56,850 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:56" (1/1) ...
[2021-02-21 21:17:56,851 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:56" (1/1) ...
[2021-02-21 21:17:56,853 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-02-21 21:17:56,854 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-02-21 21:17:56,855 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2021-02-21 21:17:56,855 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2021-02-21 21:17:56,856 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:56" (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
[2021-02-21 21:17:57,026 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2021-02-21 21:17:57,027 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-02-21 21:17:57,027 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2021-02-21 21:17:57,027 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2021-02-21 21:17:57,028 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2021-02-21 21:17:57,028 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2021-02-21 21:17:57,028 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2021-02-21 21:17:57,028 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2021-02-21 21:17:57,029 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-02-21 21:17:57,029 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2021-02-21 21:17:57,030 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2021-02-21 21:17:57,030 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2021-02-21 21:17:57,030 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2021-02-21 21:17:57,030 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2021-02-21 21:17:57,031 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2021-02-21 21:17:57,031 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2021-02-21 21:17:57,031 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2021-02-21 21:17:57,032 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-02-21 21:17:57,379 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-02-21 21:17:57,379 INFO  L299             CfgBuilder]: Removed 1 assume(true) statements.
[2021-02-21 21:17:57,383 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:17:57 BoogieIcfgContainer
[2021-02-21 21:17:57,383 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-02-21 21:17:57,388 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-02-21 21:17:57,389 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2021-02-21 21:17:57,395 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2021-02-21 21:17:57,398 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 09:17:56" (1/3) ...
[2021-02-21 21:17:57,399 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@750e2c70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:17:57, skipping insertion in model container
[2021-02-21 21:17:57,399 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:56" (2/3) ...
[2021-02-21 21:17:57,400 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@750e2c70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:17:57, skipping insertion in model container
[2021-02-21 21:17:57,400 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:17:57" (3/3) ...
[2021-02-21 21:17:57,401 INFO  L111   eAbstractionObserver]: Analyzing ICFG terminator_01.c
[2021-02-21 21:17:57,408 INFO  L153   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION
[2021-02-21 21:17:57,413 INFO  L165   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2021-02-21 21:17:57,433 INFO  L253      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-02-21 21:17:57,457 INFO  L376      AbstractCegarLoop]: Interprodecural is true
[2021-02-21 21:17:57,457 INFO  L377      AbstractCegarLoop]: Hoare is true
[2021-02-21 21:17:57,457 INFO  L378      AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation
[2021-02-21 21:17:57,457 INFO  L379      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2021-02-21 21:17:57,457 INFO  L380      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2021-02-21 21:17:57,458 INFO  L381      AbstractCegarLoop]: Difference is false
[2021-02-21 21:17:57,458 INFO  L382      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2021-02-21 21:17:57,458 INFO  L386      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2021-02-21 21:17:57,473 INFO  L276                IsEmpty]: Start isEmpty. Operand 41 states.
[2021-02-21 21:17:57,482 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2021-02-21 21:17:57,482 INFO  L414         BasicCegarLoop]: Found error trace
[2021-02-21 21:17:57,483 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]
[2021-02-21 21:17:57,483 INFO  L428      AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-21 21:17:57,490 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-02-21 21:17:57,490 INFO  L82        PathProgramCache]: Analyzing trace with hash 1585410103, now seen corresponding path program 1 times
[2021-02-21 21:17:57,500 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-02-21 21:17:57,500 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571143300]
[2021-02-21 21:17:57,501 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-21 21:17:57,571 INFO  L218   tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-02-21 21:17:57,652 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-21 21:17:57,712 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 21:17:57,714 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-21 21:17:57,716 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 21:17:57,717 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-21 21:17:57,785 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-02-21 21:17:57,792 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-21 21:17:57,806 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 21:17:57,808 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-21 21:17:57,815 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-02-21 21:17:57,816 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571143300]
[2021-02-21 21:17:57,819 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-02-21 21:17:57,819 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-02-21 21:17:57,819 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915703989]
[2021-02-21 21:17:57,825 INFO  L460      AbstractCegarLoop]: Interpolant automaton has 3 states
[2021-02-21 21:17:57,825 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2021-02-21 21:17:57,839 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-02-21 21:17:57,840 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-02-21 21:17:57,843 INFO  L87              Difference]: Start difference. First operand 41 states. Second operand 3 states.
[2021-02-21 21:17:57,965 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-02-21 21:17:57,965 INFO  L93              Difference]: Finished difference Result 55 states and 58 transitions.
[2021-02-21 21:17:57,966 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-02-21 21:17:57,967 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 22
[2021-02-21 21:17:57,968 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-02-21 21:17:57,975 INFO  L225             Difference]: With dead ends: 55
[2021-02-21 21:17:57,975 INFO  L226             Difference]: Without dead ends: 31
[2021-02-21 21:17:57,978 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-02-21 21:17:57,996 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 31 states.
[2021-02-21 21:17:58,018 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31.
[2021-02-21 21:17:58,022 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 31 states.
[2021-02-21 21:17:58,025 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions.
[2021-02-21 21:17:58,027 INFO  L78                 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 22
[2021-02-21 21:17:58,027 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-02-21 21:17:58,027 INFO  L480      AbstractCegarLoop]: Abstraction has 31 states and 31 transitions.
[2021-02-21 21:17:58,027 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2021-02-21 21:17:58,028 INFO  L276                IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions.
[2021-02-21 21:17:58,029 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2021-02-21 21:17:58,029 INFO  L414         BasicCegarLoop]: Found error trace
[2021-02-21 21:17:58,029 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]
[2021-02-21 21:17:58,029 WARN  L517      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-02-21 21:17:58,030 INFO  L428      AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-21 21:17:58,031 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-02-21 21:17:58,031 INFO  L82        PathProgramCache]: Analyzing trace with hash -1903372374, now seen corresponding path program 1 times
[2021-02-21 21:17:58,031 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-02-21 21:17:58,031 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604927912]
[2021-02-21 21:17:58,032 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-21 21:17:58,035 INFO  L218   tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-02-21 21:17:58,068 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2021-02-21 21:17:58,069 INFO  L223             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2021-02-21 21:17:58,094 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2021-02-21 21:17:58,095 INFO  L223             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2021-02-21 21:17:58,137 INFO  L173   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2021-02-21 21:17:58,138 INFO  L523         BasicCegarLoop]: Counterexample might be feasible
[2021-02-21 21:17:58,138 WARN  L517      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-02-21 21:17:58,155 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 09:17:58 BoogieIcfgContainer
[2021-02-21 21:17:58,156 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2021-02-21 21:17:58,158 INFO  L168              Benchmark]: Toolchain (without parser) took 1611.37 ms. Allocated memory was 169.9 MB in the beginning and 204.5 MB in the end (delta: 34.6 MB). Free memory was 152.5 MB in the beginning and 184.9 MB in the end (delta: -32.4 MB). Peak memory consumption was 52.4 MB. Max. memory is 8.0 GB.
[2021-02-21 21:17:58,159 INFO  L168              Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 169.9 MB. Free memory is still 143.0 MB. There was no memory consumed. Max. memory is 8.0 GB.
[2021-02-21 21:17:58,160 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 253.69 ms. Allocated memory is still 169.9 MB. Free memory was 151.5 MB in the beginning and 142.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB.
[2021-02-21 21:17:58,161 INFO  L168              Benchmark]: Boogie Preprocessor took 40.42 ms. Allocated memory is still 169.9 MB. Free memory was 142.0 MB in the beginning and 140.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
[2021-02-21 21:17:58,162 INFO  L168              Benchmark]: RCFGBuilder took 529.04 ms. Allocated memory is still 169.9 MB. Free memory was 140.7 MB in the beginning and 139.9 MB in the end (delta: 791.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB.
[2021-02-21 21:17:58,163 INFO  L168              Benchmark]: TraceAbstraction took 767.41 ms. Allocated memory was 169.9 MB in the beginning and 204.5 MB in the end (delta: 34.6 MB). Free memory was 139.5 MB in the beginning and 184.9 MB in the end (delta: -45.3 MB). Peak memory consumption was 41.2 MB. Max. memory is 8.0 GB.
[2021-02-21 21:17:58,167 INFO  L339   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.21 ms. Allocated memory is still 169.9 MB. Free memory is still 143.0 MB. There was no memory consumed. Max. memory is 8.0 GB.
 * CACSL2BoogieTranslator took 253.69 ms. Allocated memory is still 169.9 MB. Free memory was 151.5 MB in the beginning and 142.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB.
 * Boogie Preprocessor took 40.42 ms. Allocated memory is still 169.9 MB. Free memory was 142.0 MB in the beginning and 140.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
 * RCFGBuilder took 529.04 ms. Allocated memory is still 169.9 MB. Free memory was 140.7 MB in the beginning and 139.9 MB in the end (delta: 791.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB.
 * TraceAbstraction took 767.41 ms. Allocated memory was 169.9 MB in the beginning and 204.5 MB in the end (delta: 34.6 MB). Free memory was 139.5 MB in the beginning and 184.9 MB in the end (delta: -45.3 MB). Peak memory consumption was 41.2 MB. Max. memory is 8.0 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - CounterExampleResult [Line: 7]: a call to reach_error is reachable
    a call to reach_error is reachable
We found a FailurePath: 
[L15]              int x=__VERIFIER_nondet_int();
[L15]              int x=__VERIFIER_nondet_int();
[L16]              int *p = &x;
[L18]  EXPR        \read(x)
[L18]  COND FALSE  !(x<100)
[L21]  CALL        __VERIFIER_assert(0)
[L6]   COND TRUE   !(cond)
[L7]               reach_error()

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 5 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 39 SDtfs, 5 SDslu, 5 SDs, 0 SdLazy, 28 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 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 proved your program to be incorrect!
Received shutdown request...