/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/ldv-regression/test13.c


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


This is Ultimate 0.2.1-dev-36cd7be
[2021-02-23 23:05:10,809 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2021-02-23 23:05:10,812 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2021-02-23 23:05:10,862 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
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[2021-02-23 23:05:10,865 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2021-02-23 23:05:10,867 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-02-23 23:05:10,868 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-02-23 23:05:10,869 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-02-23 23:05:10,883 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-02-23 23:05:10,893 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2021-02-23 23:05:10,895 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-02-23 23:05:10,899 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-02-23 23:05:10,901 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2021-02-23 23:05:10,902 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2021-02-23 23:05:10,908 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2021-02-23 23:05:10,927 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2021-02-23 23:05:10,929 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2021-02-23 23:05:10,935 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf
[2021-02-23 23:05:10,960 INFO  L113        SettingsManager]: Loading preferences was successful
[2021-02-23 23:05:10,960 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2021-02-23 23:05:10,965 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-02-23 23:05:10,966 INFO  L138        SettingsManager]:  * sizeof long=4
[2021-02-23 23:05:10,966 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2021-02-23 23:05:10,966 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2021-02-23 23:05:10,966 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2021-02-23 23:05:10,966 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2021-02-23 23:05:10,966 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-02-23 23:05:10,967 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2021-02-23 23:05:10,968 INFO  L138        SettingsManager]:  * sizeof long double=12
[2021-02-23 23:05:10,968 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2021-02-23 23:05:10,968 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2021-02-23 23:05:10,969 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2021-02-23 23:05:10,969 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-02-23 23:05:10,969 INFO  L138        SettingsManager]:  * Size of a code block=SingleStatement
[2021-02-23 23:05:10,969 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2021-02-23 23:05:10,969 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2021-02-23 23:05:10,970 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-02-23 23:05:10,970 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-02-23 23:05:10,970 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=AcceleratedInterpolation
[2021-02-23 23:05:10,970 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-02-23 23:05:10,970 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true
[2021-02-23 23:05:11,388 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2021-02-23 23:05:11,419 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-02-23 23:05:11,422 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-02-23 23:05:11,424 INFO  L271        PluginConnector]: Initializing CDTParser...
[2021-02-23 23:05:11,425 INFO  L275        PluginConnector]: CDTParser initialized
[2021-02-23 23:05:11,426 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test13.c
[2021-02-23 23:05:11,515 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4fd7de53/71c7993dc9d84d1482aa8c09cb3cb5d7/FLAGcc0ac2e75
[2021-02-23 23:05:12,179 INFO  L306              CDTParser]: Found 1 translation units.
[2021-02-23 23:05:12,179 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test13.c
[2021-02-23 23:05:12,187 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4fd7de53/71c7993dc9d84d1482aa8c09cb3cb5d7/FLAGcc0ac2e75
[2021-02-23 23:05:12,535 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4fd7de53/71c7993dc9d84d1482aa8c09cb3cb5d7
[2021-02-23 23:05:12,539 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-02-23 23:05:12,553 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2021-02-23 23:05:12,554 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-02-23 23:05:12,555 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-02-23 23:05:12,560 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2021-02-23 23:05:12,561 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:05:12" (1/1) ...
[2021-02-23 23:05:12,563 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e908ede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:12, skipping insertion in model container
[2021-02-23 23:05:12,563 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:05:12" (1/1) ...
[2021-02-23 23:05:12,573 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2021-02-23 23:05:12,591 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2021-02-23 23:05:12,732 WARN  L226   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test13.c[377,390]
[2021-02-23 23:05:12,740 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2021-02-23 23:05:12,757 INFO  L203         MainTranslator]: Completed pre-run
[2021-02-23 23:05:12,769 WARN  L226   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test13.c[377,390]
[2021-02-23 23:05:12,771 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2021-02-23 23:05:12,789 INFO  L208         MainTranslator]: Completed translation
[2021-02-23 23:05:12,789 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:12 WrapperNode
[2021-02-23 23:05:12,789 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-02-23 23:05:12,791 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-02-23 23:05:12,791 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2021-02-23 23:05:12,791 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2021-02-23 23:05:12,806 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:12" (1/1) ...
[2021-02-23 23:05:12,806 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:12" (1/1) ...
[2021-02-23 23:05:12,815 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:12" (1/1) ...
[2021-02-23 23:05:12,816 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:12" (1/1) ...
[2021-02-23 23:05:12,822 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:12" (1/1) ...
[2021-02-23 23:05:12,825 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:12" (1/1) ...
[2021-02-23 23:05:12,826 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:12" (1/1) ...
[2021-02-23 23:05:12,829 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-02-23 23:05:12,830 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-02-23 23:05:12,830 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2021-02-23 23:05:12,830 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2021-02-23 23:05:12,831 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:12" (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
[2021-02-23 23:05:12,965 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2021-02-23 23:05:12,966 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-02-23 23:05:12,966 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2021-02-23 23:05:12,966 INFO  L138     BoogieDeclarations]: Found implementation of procedure check
[2021-02-23 23:05:12,967 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2021-02-23 23:05:12,967 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2021-02-23 23:05:12,968 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2021-02-23 23:05:12,968 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2021-02-23 23:05:12,968 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-02-23 23:05:12,968 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2021-02-23 23:05:12,969 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2021-02-23 23:05:12,969 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2021-02-23 23:05:12,970 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2021-02-23 23:05:12,970 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-02-23 23:05:12,971 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2021-02-23 23:05:12,971 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2021-02-23 23:05:12,971 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2021-02-23 23:05:13,313 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-02-23 23:05:13,314 INFO  L299             CfgBuilder]: Removed 0 assume(true) statements.
[2021-02-23 23:05:13,315 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:05:13 BoogieIcfgContainer
[2021-02-23 23:05:13,316 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-02-23 23:05:13,318 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-02-23 23:05:13,318 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2021-02-23 23:05:13,322 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2021-02-23 23:05:13,323 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 11:05:12" (1/3) ...
[2021-02-23 23:05:13,324 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cd03e2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:05:13, skipping insertion in model container
[2021-02-23 23:05:13,325 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:12" (2/3) ...
[2021-02-23 23:05:13,325 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cd03e2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:05:13, skipping insertion in model container
[2021-02-23 23:05:13,325 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:05:13" (3/3) ...
[2021-02-23 23:05:13,327 INFO  L111   eAbstractionObserver]: Analyzing ICFG test13.c
[2021-02-23 23:05:13,336 INFO  L153   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2021-02-23 23:05:13,342 INFO  L165   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2021-02-23 23:05:13,367 INFO  L253      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-02-23 23:05:13,502 INFO  L376      AbstractCegarLoop]: Interprodecural is true
[2021-02-23 23:05:13,503 INFO  L377      AbstractCegarLoop]: Hoare is true
[2021-02-23 23:05:13,503 INFO  L378      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2021-02-23 23:05:13,503 INFO  L379      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2021-02-23 23:05:13,503 INFO  L380      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2021-02-23 23:05:13,503 INFO  L381      AbstractCegarLoop]: Difference is false
[2021-02-23 23:05:13,503 INFO  L382      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2021-02-23 23:05:13,504 INFO  L386      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2021-02-23 23:05:13,527 INFO  L276                IsEmpty]: Start isEmpty. Operand 32 states.
[2021-02-23 23:05:13,538 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2021-02-23 23:05:13,538 INFO  L414         BasicCegarLoop]: Found error trace
[2021-02-23 23:05:13,539 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]
[2021-02-23 23:05:13,540 INFO  L428      AbstractCegarLoop]: === Iteration 1 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-23 23:05:13,547 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-02-23 23:05:13,547 INFO  L82        PathProgramCache]: Analyzing trace with hash -1258297951, now seen corresponding path program 1 times
[2021-02-23 23:05:13,558 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-02-23 23:05:13,558 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15967157]
[2021-02-23 23:05:13,559 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-23 23:05:13,763 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-23 23:05:13,886 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-23 23:05:13,889 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7
[2021-02-23 23:05:13,931 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-23 23:05:13,932 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7
[2021-02-23 23:05:13,944 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-23 23:05:13,945 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7
[2021-02-23 23:05:13,958 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-23 23:05:13,960 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7
[2021-02-23 23:05:13,973 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-23 23:05:13,974 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-23 23:05:14,050 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-02-23 23:05:14,073 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-23 23:05:14,097 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-23 23:05:14,098 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-23 23:05:14,099 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-23 23:05:14,100 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7
[2021-02-23 23:05:14,109 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-02-23 23:05:14,110 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15967157]
[2021-02-23 23:05:14,114 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-02-23 23:05:14,115 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2021-02-23 23:05:14,116 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113972420]
[2021-02-23 23:05:14,124 INFO  L460      AbstractCegarLoop]: Interpolant automaton has 7 states
[2021-02-23 23:05:14,124 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2021-02-23 23:05:14,149 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2021-02-23 23:05:14,150 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2021-02-23 23:05:14,154 INFO  L87              Difference]: Start difference. First operand 32 states. Second operand 7 states.
[2021-02-23 23:05:14,498 WARN  L202               SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 63
[2021-02-23 23:05:14,808 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-02-23 23:05:14,809 INFO  L93              Difference]: Finished difference Result 39 states and 38 transitions.
[2021-02-23 23:05:14,810 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2021-02-23 23:05:14,811 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 23
[2021-02-23 23:05:14,812 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-02-23 23:05:14,819 INFO  L225             Difference]: With dead ends: 39
[2021-02-23 23:05:14,820 INFO  L226             Difference]: Without dead ends: 0
[2021-02-23 23:05:14,824 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110
[2021-02-23 23:05:14,844 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2021-02-23 23:05:14,851 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2021-02-23 23:05:14,852 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 0 states.
[2021-02-23 23:05:14,852 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2021-02-23 23:05:14,854 INFO  L78                 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23
[2021-02-23 23:05:14,854 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-02-23 23:05:14,855 INFO  L480      AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2021-02-23 23:05:14,855 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2021-02-23 23:05:14,855 INFO  L276                IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2021-02-23 23:05:14,855 INFO  L282                IsEmpty]: Finished isEmpty. No accepting run.
[2021-02-23 23:05:14,856 WARN  L517      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-02-23 23:05:14,858 INFO  L343    DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.
[2021-02-23 23:05:15,532 INFO  L189         CegarLoopUtils]: For program point  reach_errorEXIT(line 3)  no Hoare annotation was computed.
[2021-02-23 23:05:15,532 INFO  L189         CegarLoopUtils]: For program point  reach_errorENTRY(line 3)  no Hoare annotation was computed.
[2021-02-23 23:05:15,532 INFO  L189         CegarLoopUtils]: For program point  reach_errorFINAL(line 3)  no Hoare annotation was computed.
[2021-02-23 23:05:15,533 INFO  L192         CegarLoopUtils]: At program point  L3-2(line 3)  the Hoare annotation is:  true
[2021-02-23 23:05:15,533 INFO  L192         CegarLoopUtils]: At program point  L3-3(line 3)  the Hoare annotation is:  true
[2021-02-23 23:05:15,533 INFO  L192         CegarLoopUtils]: At program point  L-1(line -1)  the Hoare annotation is:  true
[2021-02-23 23:05:15,533 INFO  L192         CegarLoopUtils]: At program point  L3-4(line 3)  the Hoare annotation is:  true
[2021-02-23 23:05:15,533 INFO  L192         CegarLoopUtils]: At program point  L-1-1(line -1)  the Hoare annotation is:  true
[2021-02-23 23:05:15,533 INFO  L192         CegarLoopUtils]: At program point  L3-5(line 3)  the Hoare annotation is:  true
[2021-02-23 23:05:15,533 INFO  L185         CegarLoopUtils]: At program point  ULTIMATE.initFINAL(line -1)  the Hoare annotation is:  (and (= ~pa~0.base |~#a~0.base|) (= ~pa~0.offset |~#a~0.offset|))
[2021-02-23 23:05:15,534 INFO  L185         CegarLoopUtils]: At program point  L17(line 17)  the Hoare annotation is:  (and (= ~pa~0.base |~#a~0.base|) (= ~pa~0.offset |~#a~0.offset|))
[2021-02-23 23:05:15,534 INFO  L192         CegarLoopUtils]: At program point  L16(line 16)  the Hoare annotation is:  true
[2021-02-23 23:05:15,534 INFO  L192         CegarLoopUtils]: At program point  L16-1(line 16)  the Hoare annotation is:  true
[2021-02-23 23:05:15,534 INFO  L192         CegarLoopUtils]: At program point  L16-2(line 16)  the Hoare annotation is:  true
[2021-02-23 23:05:15,534 INFO  L192         CegarLoopUtils]: At program point  L16-3(line 16)  the Hoare annotation is:  true
[2021-02-23 23:05:15,535 INFO  L185         CegarLoopUtils]: At program point  ULTIMATE.initENTRY(line -1)  the Hoare annotation is:  (and (= |#t~string5.offset| |old(#t~string5.offset)|) (= ~pa~0.base |old(~pa~0.base)|) (= ~pa~0.offset |old(~pa~0.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |~#a~0.offset| |old(~#a~0.offset)|) (= |~#b~0.base| |old(~#b~0.base)|) (= |~#a~0.base| |old(~#a~0.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |old(#valid)| |#valid|) (= |#t~string5.base| |old(#t~string5.base)|) (= ~pb~0.base |old(~pb~0.base)|) (= |~#b~0.offset| |old(~#b~0.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= ~pb~0.offset |old(~pb~0.offset)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|))
[2021-02-23 23:05:15,535 INFO  L192         CegarLoopUtils]: At program point  L3(line 3)  the Hoare annotation is:  true
[2021-02-23 23:05:15,535 INFO  L192         CegarLoopUtils]: At program point  L3-1(line 3)  the Hoare annotation is:  true
[2021-02-23 23:05:15,535 INFO  L185         CegarLoopUtils]: At program point  ULTIMATE.initEXIT(line -1)  the Hoare annotation is:  (and (= ~pa~0.base |~#a~0.base|) (= ~pa~0.offset |~#a~0.offset|))
[2021-02-23 23:05:15,536 INFO  L185         CegarLoopUtils]: At program point  ULTIMATE.startEXIT(line -1)  the Hoare annotation is:  (and (= ~pa~0.base |~#a~0.base|) (= ~pa~0.offset |~#a~0.offset|))
[2021-02-23 23:05:15,536 INFO  L185         CegarLoopUtils]: At program point  L-1(line -1)  the Hoare annotation is:  (and (= ~pa~0.base |~#a~0.base|) (= ~pa~0.offset |~#a~0.offset|))
[2021-02-23 23:05:15,536 INFO  L192         CegarLoopUtils]: At program point  ULTIMATE.startENTRY(line -1)  the Hoare annotation is:  true
[2021-02-23 23:05:15,536 INFO  L185         CegarLoopUtils]: At program point  ULTIMATE.startFINAL(line -1)  the Hoare annotation is:  (and (= ~pa~0.base |~#a~0.base|) (= ~pa~0.offset |~#a~0.offset|))
[2021-02-23 23:05:15,536 INFO  L192         CegarLoopUtils]: At program point  mainENTRY(lines 19 22)  the Hoare annotation is:  true
[2021-02-23 23:05:15,537 INFO  L192         CegarLoopUtils]: At program point  mainFINAL(lines 19 22)  the Hoare annotation is:  true
[2021-02-23 23:05:15,537 INFO  L192         CegarLoopUtils]: At program point  mainEXIT(lines 19 22)  the Hoare annotation is:  true
[2021-02-23 23:05:15,537 INFO  L192         CegarLoopUtils]: At program point  L20(line 20)  the Hoare annotation is:  true
[2021-02-23 23:05:15,537 INFO  L192         CegarLoopUtils]: At program point  checkENTRY(lines 6 14)  the Hoare annotation is:  true
[2021-02-23 23:05:15,537 INFO  L185         CegarLoopUtils]: At program point  L12(line 12)  the Hoare annotation is:  (or (not (= |~#a~0.offset| ~pa~0.offset)) (not (= |~#a~0.base| ~pa~0.base)) (not (= |check_#in~b.offset| |check_#in~a.offset|)) (not (= |check_#in~a.base| |check_#in~b.base|)))
[2021-02-23 23:05:15,538 INFO  L185         CegarLoopUtils]: At program point  L8(lines 6 14)  the Hoare annotation is:  (or (not (= |~#a~0.offset| ~pa~0.offset)) (not (= |~#a~0.base| ~pa~0.base)) (not (= |check_#in~b.offset| |check_#in~a.offset|)) (not (= |check_#in~a.base| |check_#in~b.base|)))
[2021-02-23 23:05:15,538 INFO  L185         CegarLoopUtils]: At program point  checkErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12)  the Hoare annotation is:  (or (not (= |~#a~0.offset| ~pa~0.offset)) (not (= |~#a~0.base| ~pa~0.base)) (not (= |check_#in~b.offset| |check_#in~a.offset|)) (not (= |check_#in~a.base| |check_#in~b.base|)))
[2021-02-23 23:05:15,538 INFO  L185         CegarLoopUtils]: At program point  L7(lines 7 9)  the Hoare annotation is:  (or (not (= ~pa~0.base |~#a~0.base|)) (and (= check_~a.base check_~b.base) (= check_~a.base |check_#in~b.base|) (= |check_#in~b.offset| check_~a.offset) (= check_~a.offset check_~b.offset)) (not (= |check_#in~b.offset| |check_#in~a.offset|)) (not (= ~pa~0.offset |~#a~0.offset|)) (not (= |check_#in~a.base| |check_#in~b.base|)))
[2021-02-23 23:05:15,539 INFO  L185         CegarLoopUtils]: At program point  checkFINAL(lines 6 14)  the Hoare annotation is:  (or (not (= ~pa~0.base |~#a~0.base|)) (and (= check_~a.base check_~b.base) (= check_~a.base |check_#in~b.base|) (= |check_#in~b.offset| check_~a.offset) (= check_~a.offset check_~b.offset)) (not (= |check_#in~b.offset| |check_#in~a.offset|)) (not (= ~pa~0.offset |~#a~0.offset|)) (not (= |check_#in~a.base| |check_#in~b.base|)))
[2021-02-23 23:05:15,539 INFO  L185         CegarLoopUtils]: At program point  L6(lines 6 14)  the Hoare annotation is:  (or (and (= check_~a.base |check_#in~b.base|) (= |check_#in~b.offset| check_~a.offset)) (not (= ~pa~0.base |~#a~0.base|)) (not (= |check_#in~b.offset| |check_#in~a.offset|)) (not (= ~pa~0.offset |~#a~0.offset|)) (not (= |check_#in~a.base| |check_#in~b.base|)))
[2021-02-23 23:05:15,539 INFO  L185         CegarLoopUtils]: At program point  checkEXIT(lines 6 14)  the Hoare annotation is:  (or (not (= ~pa~0.base |~#a~0.base|)) (and (= check_~a.base check_~b.base) (= check_~a.base |check_#in~b.base|) (= |check_#in~b.offset| check_~a.offset) (= check_~a.offset check_~b.offset)) (not (= |check_#in~b.offset| |check_#in~a.offset|)) (not (= ~pa~0.offset |~#a~0.offset|)) (not (= |check_#in~a.base| |check_#in~b.base|)))
[2021-02-23 23:05:15,561 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 11:05:15 BoogieIcfgContainer
[2021-02-23 23:05:15,562 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2021-02-23 23:05:15,564 INFO  L168              Benchmark]: Toolchain (without parser) took 3022.30 ms. Allocated memory was 151.0 MB in the beginning and 204.5 MB in the end (delta: 53.5 MB). Free memory was 128.1 MB in the beginning and 163.5 MB in the end (delta: -35.3 MB). Peak memory consumption was 103.5 MB. Max. memory is 8.0 GB.
[2021-02-23 23:05:15,565 INFO  L168              Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 151.0 MB. Free memory is still 124.4 MB. There was no memory consumed. Max. memory is 8.0 GB.
[2021-02-23 23:05:15,566 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 235.45 ms. Allocated memory is still 151.0 MB. Free memory was 127.0 MB in the beginning and 117.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB.
[2021-02-23 23:05:15,567 INFO  L168              Benchmark]: Boogie Preprocessor took 38.26 ms. Allocated memory is still 151.0 MB. Free memory was 117.9 MB in the beginning and 116.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
[2021-02-23 23:05:15,568 INFO  L168              Benchmark]: RCFGBuilder took 486.01 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 102.1 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB.
[2021-02-23 23:05:15,569 INFO  L168              Benchmark]: TraceAbstraction took 2243.97 ms. Allocated memory was 151.0 MB in the beginning and 204.5 MB in the end (delta: 53.5 MB). Free memory was 101.7 MB in the beginning and 163.5 MB in the end (delta: -61.8 MB). Peak memory consumption was 76.2 MB. Max. memory is 8.0 GB.
[2021-02-23 23:05:15,573 INFO  L339   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.29 ms. Allocated memory is still 151.0 MB. Free memory is still 124.4 MB. There was no memory consumed. Max. memory is 8.0 GB.
 * CACSL2BoogieTranslator took 235.45 ms. Allocated memory is still 151.0 MB. Free memory was 127.0 MB in the beginning and 117.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB.
 * Boogie Preprocessor took 38.26 ms. Allocated memory is still 151.0 MB. Free memory was 117.9 MB in the beginning and 116.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
 * RCFGBuilder took 486.01 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 102.1 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB.
 * TraceAbstraction took 2243.97 ms. Allocated memory was 151.0 MB in the beginning and 204.5 MB in the end (delta: 53.5 MB). Free memory was 101.7 MB in the beginning and 163.5 MB in the end (delta: -61.8 MB). Peak memory consumption was 76.2 MB. Max. memory is 8.0 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - PositiveResult [Line: 12]: 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: 6]: Loop Invariant
    Derived loop invariant: ((!(a == pa) || !(a == pa)) || !(b == a)) || !(a == b)
  - ProcedureContractResult [Line: 19]: Procedure Contract for main
    Derived contract for procedure main: 1
  - ProcedureContractResult [Line: 6]: Procedure Contract for check
    Derived contract for procedure check: (((!(pa == a) || (((a == b && a == b) && b == a) && a == b)) || !(b == a)) || !(pa == a)) || !(a == b)
  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 5 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.3s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 23 SDtfs, 22 SDslu, 72 SDs, 0 SdLazy, 36 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred 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: 0.0s HoareAnnotationTime, 32 LocationsWithAnnotation, 32 PreInvPairs, 39 NumberOfFragments, 280 HoareAnnotationTreeSize, 32 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 32 FomulaSimplificationsInter, 623 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 2728 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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...