/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/loops-crafted-1/sumt7.c


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


This is Ultimate 0.2.1-dev-36cd7be
[2021-02-24 04:50:19,631 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2021-02-24 04:50:19,635 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2021-02-24 04:50:19,701 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-02-24 04:50:19,705 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2021-02-24 04:50:19,736 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-02-24 04:50:19,740 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-02-24 04:50:19,754 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-02-24 04:50:19,762 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-02-24 04:50:19,770 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2021-02-24 04:50:19,773 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-02-24 04:50:19,775 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-02-24 04:50:19,777 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2021-02-24 04:50:19,779 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2021-02-24 04:50:19,789 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2021-02-24 04:50:19,789 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
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[2021-02-24 04:50:19,803 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2021-02-24 04:50:19,805 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 04:50:19,830 INFO  L113        SettingsManager]: Loading preferences was successful
[2021-02-24 04:50:19,830 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2021-02-24 04:50:19,835 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-02-24 04:50:19,835 INFO  L138        SettingsManager]:  * sizeof long=4
[2021-02-24 04:50:19,836 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2021-02-24 04:50:19,836 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2021-02-24 04:50:19,836 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2021-02-24 04:50:19,836 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2021-02-24 04:50:19,836 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-02-24 04:50:19,837 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2021-02-24 04:50:19,838 INFO  L138        SettingsManager]:  * sizeof long double=12
[2021-02-24 04:50:19,838 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2021-02-24 04:50:19,838 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2021-02-24 04:50:19,839 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2021-02-24 04:50:19,839 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-02-24 04:50:19,839 INFO  L138        SettingsManager]:  * Size of a code block=SingleStatement
[2021-02-24 04:50:19,840 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2021-02-24 04:50:19,840 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2021-02-24 04:50:19,840 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-02-24 04:50:19,840 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-02-24 04:50:19,841 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=AcceleratedInterpolation
[2021-02-24 04:50:19,841 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-02-24 04:50:19,841 INFO  L138        SettingsManager]:  * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX
[2021-02-24 04:50:19,841 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2021-02-24 04:50:20,225 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2021-02-24 04:50:20,262 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-02-24 04:50:20,266 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-02-24 04:50:20,268 INFO  L271        PluginConnector]: Initializing CDTParser...
[2021-02-24 04:50:20,268 INFO  L275        PluginConnector]: CDTParser initialized
[2021-02-24 04:50:20,270 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt7.c
[2021-02-24 04:50:20,358 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70c843c7d/e25f6e32be384c87b29acc91a3d4fea2/FLAG5698a54f5
[2021-02-24 04:50:21,019 INFO  L306              CDTParser]: Found 1 translation units.
[2021-02-24 04:50:21,020 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt7.c
[2021-02-24 04:50:21,033 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70c843c7d/e25f6e32be384c87b29acc91a3d4fea2/FLAG5698a54f5
[2021-02-24 04:50:21,391 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70c843c7d/e25f6e32be384c87b29acc91a3d4fea2
[2021-02-24 04:50:21,394 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-02-24 04:50:21,411 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2021-02-24 04:50:21,419 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-02-24 04:50:21,420 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-02-24 04:50:21,425 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2021-02-24 04:50:21,426 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:50:21" (1/1) ...
[2021-02-24 04:50:21,428 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@657e1742 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:21, skipping insertion in model container
[2021-02-24 04:50:21,428 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:50:21" (1/1) ...
[2021-02-24 04:50:21,439 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2021-02-24 04:50:21,462 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2021-02-24 04:50:21,696 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-crafted-1/sumt7.c[403,416]
[2021-02-24 04:50:21,733 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2021-02-24 04:50:21,744 INFO  L203         MainTranslator]: Completed pre-run
[2021-02-24 04:50:21,757 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-crafted-1/sumt7.c[403,416]
[2021-02-24 04:50:21,785 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2021-02-24 04:50:21,804 INFO  L208         MainTranslator]: Completed translation
[2021-02-24 04:50:21,805 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:21 WrapperNode
[2021-02-24 04:50:21,805 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-02-24 04:50:21,806 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-02-24 04:50:21,807 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2021-02-24 04:50:21,807 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2021-02-24 04:50:21,820 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:21" (1/1) ...
[2021-02-24 04:50:21,820 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:21" (1/1) ...
[2021-02-24 04:50:21,827 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:21" (1/1) ...
[2021-02-24 04:50:21,827 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:21" (1/1) ...
[2021-02-24 04:50:21,834 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:21" (1/1) ...
[2021-02-24 04:50:21,839 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:21" (1/1) ...
[2021-02-24 04:50:21,841 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:21" (1/1) ...
[2021-02-24 04:50:21,844 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-02-24 04:50:21,845 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-02-24 04:50:21,845 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2021-02-24 04:50:21,846 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2021-02-24 04:50:21,846 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:21" (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 04:50:21,945 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2021-02-24 04:50:21,945 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-02-24 04:50:21,946 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2021-02-24 04:50:21,946 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2021-02-24 04:50:21,946 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2021-02-24 04:50:21,946 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2021-02-24 04:50:21,946 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2021-02-24 04:50:21,946 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2021-02-24 04:50:21,947 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2021-02-24 04:50:21,947 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-02-24 04:50:21,947 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2021-02-24 04:50:21,947 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2021-02-24 04:50:21,947 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2021-02-24 04:50:21,948 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2021-02-24 04:50:21,948 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2021-02-24 04:50:21,948 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2021-02-24 04:50:21,948 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-02-24 04:50:21,948 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2021-02-24 04:50:21,948 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2021-02-24 04:50:21,949 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2021-02-24 04:50:22,409 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-02-24 04:50:22,410 INFO  L299             CfgBuilder]: Removed 1 assume(true) statements.
[2021-02-24 04:50:22,411 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:50:22 BoogieIcfgContainer
[2021-02-24 04:50:22,412 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-02-24 04:50:22,414 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-02-24 04:50:22,414 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2021-02-24 04:50:22,417 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2021-02-24 04:50:22,417 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:50:21" (1/3) ...
[2021-02-24 04:50:22,418 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ba2cf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:50:22, skipping insertion in model container
[2021-02-24 04:50:22,418 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:21" (2/3) ...
[2021-02-24 04:50:22,419 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ba2cf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:50:22, skipping insertion in model container
[2021-02-24 04:50:22,419 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:50:22" (3/3) ...
[2021-02-24 04:50:22,421 INFO  L111   eAbstractionObserver]: Analyzing ICFG sumt7.c
[2021-02-24 04:50:22,428 INFO  L153   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION
[2021-02-24 04:50:22,432 INFO  L165   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2021-02-24 04:50:22,453 INFO  L253      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-02-24 04:50:22,481 INFO  L376      AbstractCegarLoop]: Interprodecural is true
[2021-02-24 04:50:22,481 INFO  L377      AbstractCegarLoop]: Hoare is true
[2021-02-24 04:50:22,482 INFO  L378      AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation
[2021-02-24 04:50:22,482 INFO  L379      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2021-02-24 04:50:22,482 INFO  L380      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2021-02-24 04:50:22,482 INFO  L381      AbstractCegarLoop]: Difference is false
[2021-02-24 04:50:22,482 INFO  L382      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2021-02-24 04:50:22,483 INFO  L386      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2021-02-24 04:50:22,501 INFO  L276                IsEmpty]: Start isEmpty. Operand 55 states.
[2021-02-24 04:50:22,512 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 35
[2021-02-24 04:50:22,513 INFO  L414         BasicCegarLoop]: Found error trace
[2021-02-24 04:50:22,514 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]
[2021-02-24 04:50:22,514 INFO  L428      AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-24 04:50:22,521 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-02-24 04:50:22,522 INFO  L82        PathProgramCache]: Analyzing trace with hash -1439556865, now seen corresponding path program 1 times
[2021-02-24 04:50:22,531 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-02-24 04:50:22,532 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646498063]
[2021-02-24 04:50:22,532 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-24 04:50:22,618 INFO  L218   tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-02-24 04:50:22,755 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-24 04:50:22,990 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 04:50:22,992 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-24 04:50:22,993 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 04:50:22,994 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3
[2021-02-24 04:50:23,015 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 04:50:23,016 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7
[2021-02-24 04:50:23,027 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 04:50:23,028 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10
[2021-02-24 04:50:23,042 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 04:50:23,043 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13
[2021-02-24 04:50:23,060 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 04:50:23,062 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16
[2021-02-24 04:50:23,081 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 04:50:23,083 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19
[2021-02-24 04:50:23,105 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 04:50:23,107 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22
[2021-02-24 04:50:23,133 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 04:50:23,135 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25
[2021-02-24 04:50:23,165 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 04:50:23,167 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28
[2021-02-24 04:50:23,215 WARN  L141       QuantifierPusher]: treesize reduction 32, result has 83.0 percent of original size
[2021-02-24 04:50:23,224 WARN  L147       QuantifierPusher]: treesize reduction 32, result has 83.0 percent of original size 156
[2021-02-24 04:50:23,348 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 04:50:23,349 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4
[2021-02-24 04:50:23,384 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 04:50:23,384 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4
[2021-02-24 04:50:23,395 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 04:50:23,396 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-24 04:50:23,433 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-02-24 04:50:23,439 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-24 04:50:23,452 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 04:50:23,452 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-24 04:50:23,467 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 04:50:23,469 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646498063]
[2021-02-24 04:50:23,471 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-02-24 04:50:23,472 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15
[2021-02-24 04:50:23,472 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551778770]
[2021-02-24 04:50:23,477 INFO  L460      AbstractCegarLoop]: Interpolant automaton has 15 states
[2021-02-24 04:50:23,478 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2021-02-24 04:50:23,493 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2021-02-24 04:50:23,495 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210
[2021-02-24 04:50:23,497 INFO  L87              Difference]: Start difference. First operand 55 states. Second operand 15 states.
[2021-02-24 04:50:24,815 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-02-24 04:50:24,815 INFO  L93              Difference]: Finished difference Result 168 states and 229 transitions.
[2021-02-24 04:50:24,816 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2021-02-24 04:50:24,817 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states. Word has length 34
[2021-02-24 04:50:24,819 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-02-24 04:50:24,832 INFO  L225             Difference]: With dead ends: 168
[2021-02-24 04:50:24,833 INFO  L226             Difference]: Without dead ends: 119
[2021-02-24 04:50:24,840 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756
[2021-02-24 04:50:24,862 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 119 states.
[2021-02-24 04:50:24,926 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 57.
[2021-02-24 04:50:24,928 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 57 states.
[2021-02-24 04:50:24,935 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions.
[2021-02-24 04:50:24,937 INFO  L78                 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 34
[2021-02-24 04:50:24,938 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-02-24 04:50:24,939 INFO  L480      AbstractCegarLoop]: Abstraction has 57 states and 63 transitions.
[2021-02-24 04:50:24,939 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 15 states.
[2021-02-24 04:50:24,939 INFO  L276                IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions.
[2021-02-24 04:50:24,943 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 44
[2021-02-24 04:50:24,943 INFO  L414         BasicCegarLoop]: Found error trace
[2021-02-24 04:50:24,945 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-02-24 04:50:24,946 WARN  L517      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-02-24 04:50:24,946 INFO  L428      AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-24 04:50:24,948 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-02-24 04:50:24,949 INFO  L82        PathProgramCache]: Analyzing trace with hash 804824585, now seen corresponding path program 1 times
[2021-02-24 04:50:24,949 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-02-24 04:50:24,950 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218418577]
[2021-02-24 04:50:24,951 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-24 04:50:29,498 WARN  L202               SmtUtils]: Spent 4.49 s on a formula simplification. DAG size of input: 538 DAG size of output: 246
[2021-02-24 04:50:29,511 FATAL L?                        ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception:
java.lang.NullPointerException
	at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.loopaccelerator.AcceleratorWernerOverapprox.accelerateLoop(AcceleratorWernerOverapprox.java:55)
	at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.acceleratedInterpolationCoreIsCorrect(AcceleratedInterpolationCore.java:183)
	at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.<init>(AcceleratedInterpolation.java:162)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:145)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:241)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.<init>(AutomatonFreeRefinementEngine.java:84)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.<init>(TraceAbstractionRefinementEngine.java:74)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:437)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:68)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:62)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateAllErrorsAtOnce(TraceAbstractionStarter.java:317)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.<init>(TraceAbstractionStarter.java:131)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
[2021-02-24 04:50:29,516 INFO  L168              Benchmark]: Toolchain (without parser) took 8117.51 ms. Allocated memory was 151.0 MB in the beginning and 222.3 MB in the end (delta: 71.3 MB). Free memory was 126.7 MB in the beginning and 166.5 MB in the end (delta: -39.8 MB). Peak memory consumption was 123.2 MB. Max. memory is 8.0 GB.
[2021-02-24 04:50:29,517 INFO  L168              Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 151.0 MB. Free memory is still 125.1 MB. There was no memory consumed. Max. memory is 8.0 GB.
[2021-02-24 04:50:29,518 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 386.36 ms. Allocated memory is still 151.0 MB. Free memory was 125.5 MB in the beginning and 115.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB.
[2021-02-24 04:50:29,519 INFO  L168              Benchmark]: Boogie Preprocessor took 37.78 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 114.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
[2021-02-24 04:50:29,520 INFO  L168              Benchmark]: RCFGBuilder took 566.56 ms. Allocated memory is still 151.0 MB. Free memory was 114.2 MB in the beginning and 128.4 MB in the end (delta: -14.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB.
[2021-02-24 04:50:29,521 INFO  L168              Benchmark]: TraceAbstraction took 7100.21 ms. Allocated memory was 151.0 MB in the beginning and 222.3 MB in the end (delta: 71.3 MB). Free memory was 127.9 MB in the beginning and 166.5 MB in the end (delta: -38.6 MB). Peak memory consumption was 124.5 MB. Max. memory is 8.0 GB.
[2021-02-24 04:50:29,526 INFO  L339   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.24 ms. Allocated memory is still 151.0 MB. Free memory is still 125.1 MB. There was no memory consumed. Max. memory is 8.0 GB.
 * CACSL2BoogieTranslator took 386.36 ms. Allocated memory is still 151.0 MB. Free memory was 125.5 MB in the beginning and 115.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB.
 * Boogie Preprocessor took 37.78 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 114.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
 * RCFGBuilder took 566.56 ms. Allocated memory is still 151.0 MB. Free memory was 114.2 MB in the beginning and 128.4 MB in the end (delta: -14.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB.
 * TraceAbstraction took 7100.21 ms. Allocated memory was 151.0 MB in the beginning and 222.3 MB in the end (delta: 71.3 MB). Free memory was 127.9 MB in the beginning and 166.5 MB in the end (delta: -38.6 MB). Peak memory consumption was 124.5 MB. Max. memory is 8.0 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - ExceptionOrErrorResult: NullPointerException: null
    de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.loopaccelerator.AcceleratorWernerOverapprox.accelerateLoop(AcceleratorWernerOverapprox.java:55)
RESULT: Ultimate could not prove your program: Toolchain returned no result.
Received shutdown request...