/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound50.c


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


This is Ultimate 0.2.1-dev-6253b08
[2021-05-06 12:29:48,421 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2021-05-06 12:29:48,423 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2021-05-06 12:29:48,463 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-05-06 12:29:48,464 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-05-06 12:29:48,467 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-05-06 12:29:48,469 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2021-05-06 12:29:48,474 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2021-05-06 12:29:48,476 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2021-05-06 12:29:48,480 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2021-05-06 12:29:48,481 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
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[2021-05-06 12:29:48,483 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2021-05-06 12:29:48,485 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2021-05-06 12:29:48,486 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2021-05-06 12:29:48,488 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-05-06 12:29:48,489 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-05-06 12:29:48,491 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-05-06 12:29:48,493 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-05-06 12:29:48,494 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2021-05-06 12:29:48,495 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-05-06 12:29:48,497 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-05-06 12:29:48,498 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2021-05-06 12:29:48,500 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2021-05-06 12:29:48,507 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2021-05-06 12:29:48,507 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2021-05-06 12:29:48,507 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2021-05-06 12:29:48,509 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2021-05-06 12:29:48,509 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2021-05-06 12:29:48,510 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2021-05-06 12:29:48,510 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2021-05-06 12:29:48,511 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2021-05-06 12:29:48,512 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2021-05-06 12:29:48,514 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2021-05-06 12:29:48,515 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2021-05-06 12:29:48,515 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2021-05-06 12:29:48,516 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
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[2021-05-06 12:29:48,516 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2021-05-06 12:29:48,535 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2021-05-06 12:29:48,538 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf
[2021-05-06 12:29:48,555 INFO  L113        SettingsManager]: Loading preferences was successful
[2021-05-06 12:29:48,555 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2021-05-06 12:29:48,557 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-05-06 12:29:48,558 INFO  L138        SettingsManager]:  * sizeof long=4
[2021-05-06 12:29:48,558 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2021-05-06 12:29:48,558 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2021-05-06 12:29:48,558 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2021-05-06 12:29:48,558 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2021-05-06 12:29:48,558 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-05-06 12:29:48,559 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2021-05-06 12:29:48,559 INFO  L138        SettingsManager]:  * sizeof long double=12
[2021-05-06 12:29:48,559 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2021-05-06 12:29:48,560 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2021-05-06 12:29:48,560 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2021-05-06 12:29:48,560 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-05-06 12:29:48,560 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2021-05-06 12:29:48,560 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2021-05-06 12:29:48,560 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2021-05-06 12:29:48,561 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-05-06 12:29:48,561 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-05-06 12:29:48,561 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=AcceleratedInterpolation
[2021-05-06 12:29:48,561 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-05-06 12:29:48,561 INFO  L138        SettingsManager]:  * Loop acceleration method that is used by accelerated interpolation=JORDAN
[2021-05-06 12:29:48,561 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2021-05-06 12:29:48,858 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2021-05-06 12:29:48,875 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-05-06 12:29:48,877 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-05-06 12:29:48,878 INFO  L271        PluginConnector]: Initializing CDTParser...
[2021-05-06 12:29:48,879 INFO  L275        PluginConnector]: CDTParser initialized
[2021-05-06 12:29:48,880 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound50.c
[2021-05-06 12:29:48,953 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c68851cf/b081c6c20cfb4bbfb2fbfde409937652/FLAGf87fbfb3a
[2021-05-06 12:29:49,455 INFO  L306              CDTParser]: Found 1 translation units.
[2021-05-06 12:29:49,456 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound50.c
[2021-05-06 12:29:49,463 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c68851cf/b081c6c20cfb4bbfb2fbfde409937652/FLAGf87fbfb3a
[2021-05-06 12:29:49,938 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c68851cf/b081c6c20cfb4bbfb2fbfde409937652
[2021-05-06 12:29:49,940 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-05-06 12:29:49,943 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2021-05-06 12:29:49,947 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-05-06 12:29:49,947 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-05-06 12:29:49,951 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2021-05-06 12:29:49,951 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:29:49" (1/1) ...
[2021-05-06 12:29:49,952 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@771d2761 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:29:49, skipping insertion in model container
[2021-05-06 12:29:49,953 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:29:49" (1/1) ...
[2021-05-06 12:29:49,959 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2021-05-06 12:29:49,973 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2021-05-06 12:29:50,074 WARN  L224   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound50.c[524,537]
[2021-05-06 12:29:50,087 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2021-05-06 12:29:50,093 INFO  L203         MainTranslator]: Completed pre-run
[2021-05-06 12:29:50,112 WARN  L224   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound50.c[524,537]
[2021-05-06 12:29:50,118 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2021-05-06 12:29:50,131 INFO  L208         MainTranslator]: Completed translation
[2021-05-06 12:29:50,131 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:29:50 WrapperNode
[2021-05-06 12:29:50,132 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-05-06 12:29:50,134 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-05-06 12:29:50,134 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2021-05-06 12:29:50,134 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2021-05-06 12:29:50,155 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:29:50" (1/1) ...
[2021-05-06 12:29:50,155 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:29:50" (1/1) ...
[2021-05-06 12:29:50,161 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:29:50" (1/1) ...
[2021-05-06 12:29:50,161 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:29:50" (1/1) ...
[2021-05-06 12:29:50,165 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:29:50" (1/1) ...
[2021-05-06 12:29:50,172 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:29:50" (1/1) ...
[2021-05-06 12:29:50,177 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:29:50" (1/1) ...
[2021-05-06 12:29:50,179 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-05-06 12:29:50,180 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-05-06 12:29:50,180 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2021-05-06 12:29:50,180 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2021-05-06 12:29:50,180 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:29:50" (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
[2021-05-06 12:29:50,249 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2021-05-06 12:29:50,249 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-05-06 12:29:50,249 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2021-05-06 12:29:50,250 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2021-05-06 12:29:50,250 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2021-05-06 12:29:50,250 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2021-05-06 12:29:50,250 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2021-05-06 12:29:50,250 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2021-05-06 12:29:50,251 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2021-05-06 12:29:50,251 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-05-06 12:29:50,251 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2021-05-06 12:29:50,251 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2021-05-06 12:29:50,252 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2021-05-06 12:29:50,252 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2021-05-06 12:29:50,252 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2021-05-06 12:29:50,252 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2021-05-06 12:29:50,252 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-05-06 12:29:50,253 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2021-05-06 12:29:50,253 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2021-05-06 12:29:50,254 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2021-05-06 12:29:50,554 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-05-06 12:29:50,554 INFO  L299             CfgBuilder]: Removed 1 assume(true) statements.
[2021-05-06 12:29:50,555 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:29:50 BoogieIcfgContainer
[2021-05-06 12:29:50,556 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-05-06 12:29:50,557 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-05-06 12:29:50,557 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2021-05-06 12:29:50,559 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2021-05-06 12:29:50,559 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 12:29:49" (1/3) ...
[2021-05-06 12:29:50,560 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29f7c713 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:29:50, skipping insertion in model container
[2021-05-06 12:29:50,560 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:29:50" (2/3) ...
[2021-05-06 12:29:50,560 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29f7c713 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:29:50, skipping insertion in model container
[2021-05-06 12:29:50,560 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:29:50" (3/3) ...
[2021-05-06 12:29:50,561 INFO  L111   eAbstractionObserver]: Analyzing ICFG fermat2-ll_valuebound50.c
[2021-05-06 12:29:50,566 INFO  L149   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION
[2021-05-06 12:29:50,569 INFO  L161   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2021-05-06 12:29:50,583 INFO  L253      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-05-06 12:29:50,599 INFO  L376      AbstractCegarLoop]: Interprodecural is true
[2021-05-06 12:29:50,600 INFO  L377      AbstractCegarLoop]: Hoare is true
[2021-05-06 12:29:50,600 INFO  L378      AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation
[2021-05-06 12:29:50,600 INFO  L379      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2021-05-06 12:29:50,600 INFO  L380      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2021-05-06 12:29:50,600 INFO  L381      AbstractCegarLoop]: Difference is false
[2021-05-06 12:29:50,600 INFO  L382      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2021-05-06 12:29:50,600 INFO  L386      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2021-05-06 12:29:50,612 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)
[2021-05-06 12:29:50,618 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 34
[2021-05-06 12:29:50,619 INFO  L515         BasicCegarLoop]: Found error trace
[2021-05-06 12:29:50,619 INFO  L523         BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-05-06 12:29:50,620 INFO  L428      AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-05-06 12:29:50,630 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-05-06 12:29:50,630 INFO  L82        PathProgramCache]: Analyzing trace with hash 1790211013, now seen corresponding path program 1 times
[2021-05-06 12:29:50,641 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-05-06 12:29:50,641 INFO  L361   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179997510]
[2021-05-06 12:29:50,642 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-05-06 12:29:50,701 INFO  L224   tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-05-06 12:29:50,768 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-06 12:29:50,900 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-05-06 12:29:50,909 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-06 12:29:50,934 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2021-05-06 12:29:50,936 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-06 12:29:50,942 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12
[2021-05-06 12:29:50,950 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-06 12:29:50,953 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17
[2021-05-06 12:29:50,954 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-06 12:29:50,960 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22
[2021-05-06 12:29:50,965 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-06 12:29:50,970 INFO  L134       CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked.
[2021-05-06 12:29:50,972 INFO  L179   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2021-05-06 12:29:50,972 INFO  L361   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179997510]
[2021-05-06 12:29:50,973 INFO  L200   FreeRefinementEngine]: IpTcStrategyModulePreferences [179997510] provided 1 perfect and 0 imperfect interpolant sequences
[2021-05-06 12:29:50,973 INFO  L226   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-05-06 12:29:50,974 INFO  L239   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-05-06 12:29:50,974 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893637360]
[2021-05-06 12:29:50,977 INFO  L460      AbstractCegarLoop]: Interpolant automaton has 3 states
[2021-05-06 12:29:50,977 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2021-05-06 12:29:50,987 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-05-06 12:29:50,988 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-05-06 12:29:50,989 INFO  L87              Difference]: Start difference. First operand  has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand  has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)
[2021-05-06 12:29:51,098 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-05-06 12:29:51,098 INFO  L93              Difference]: Finished difference Result 57 states and 80 transitions.
[2021-05-06 12:29:51,099 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-05-06 12:29:51,100 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33
[2021-05-06 12:29:51,100 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-05-06 12:29:51,106 INFO  L225             Difference]: With dead ends: 57
[2021-05-06 12:29:51,106 INFO  L226             Difference]: Without dead ends: 27
[2021-05-06 12:29:51,109 INFO  L779         BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-05-06 12:29:51,119 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 27 states.
[2021-05-06 12:29:51,149 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27.
[2021-05-06 12:29:51,150 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 27 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)
[2021-05-06 12:29:51,151 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions.
[2021-05-06 12:29:51,153 INFO  L78                 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 33
[2021-05-06 12:29:51,153 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-05-06 12:29:51,153 INFO  L480      AbstractCegarLoop]: Abstraction has 27 states and 32 transitions.
[2021-05-06 12:29:51,153 INFO  L481      AbstractCegarLoop]: Interpolant automaton has  has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)
[2021-05-06 12:29:51,163 INFO  L276                IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions.
[2021-05-06 12:29:51,164 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 34
[2021-05-06 12:29:51,164 INFO  L515         BasicCegarLoop]: Found error trace
[2021-05-06 12:29:51,164 INFO  L523         BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-05-06 12:29:51,165 WARN  L517      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-05-06 12:29:51,165 INFO  L428      AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-05-06 12:29:51,165 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-05-06 12:29:51,165 INFO  L82        PathProgramCache]: Analyzing trace with hash -102231875, now seen corresponding path program 1 times
[2021-05-06 12:29:51,165 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-05-06 12:29:51,166 INFO  L361   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663285880]
[2021-05-06 12:29:51,166 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-05-06 12:29:51,168 INFO  L224   tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-05-06 12:29:51,186 WARN  L167   FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility
[2021-05-06 12:29:51,187 INFO  L624         BasicCegarLoop]: Counterexample might be feasible
[2021-05-06 12:29:51,190 WARN  L517      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-05-06 12:29:51,200 WARN  L227   ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually.
[2021-05-06 12:29:51,200 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 12:29:51 BoogieIcfgContainer
[2021-05-06 12:29:51,200 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2021-05-06 12:29:51,204 INFO  L168              Benchmark]: Toolchain (without parser) took 1261.07 ms. Allocated memory is still 182.5 MB. Free memory was 147.4 MB in the beginning and 162.5 MB in the end (delta: -15.0 MB). There was no memory consumed. Max. memory is 8.0 GB.
[2021-05-06 12:29:51,205 INFO  L168              Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 182.5 MB. Free memory is still 164.2 MB. There was no memory consumed. Max. memory is 8.0 GB.
[2021-05-06 12:29:51,205 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 184.79 ms. Allocated memory is still 182.5 MB. Free memory was 147.2 MB in the beginning and 165.8 MB in the end (delta: -18.6 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB.
[2021-05-06 12:29:51,206 INFO  L168              Benchmark]: Boogie Preprocessor took 45.23 ms. Allocated memory is still 182.5 MB. Free memory was 165.8 MB in the beginning and 164.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB.
[2021-05-06 12:29:51,207 INFO  L168              Benchmark]: RCFGBuilder took 376.14 ms. Allocated memory is still 182.5 MB. Free memory was 164.1 MB in the beginning and 149.1 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB.
[2021-05-06 12:29:51,208 INFO  L168              Benchmark]: TraceAbstraction took 645.67 ms. Allocated memory is still 182.5 MB. Free memory was 148.8 MB in the beginning and 162.5 MB in the end (delta: -13.7 MB). There was no memory consumed. Max. memory is 8.0 GB.
[2021-05-06 12:29:51,213 INFO  L339   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.16 ms. Allocated memory is still 182.5 MB. Free memory is still 164.2 MB. There was no memory consumed. Max. memory is 8.0 GB.
 * CACSL2BoogieTranslator took 184.79 ms. Allocated memory is still 182.5 MB. Free memory was 147.2 MB in the beginning and 165.8 MB in the end (delta: -18.6 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB.
 * Boogie Preprocessor took 45.23 ms. Allocated memory is still 182.5 MB. Free memory was 165.8 MB in the beginning and 164.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB.
 * RCFGBuilder took 376.14 ms. Allocated memory is still 182.5 MB. Free memory was 164.1 MB in the beginning and 149.1 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB.
 * TraceAbstraction took 645.67 ms. Allocated memory is still 182.5 MB. Free memory was 148.8 MB in the beginning and 162.5 MB in the end (delta: -13.7 MB). There was no memory consumed. Max. memory is 8.0 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable
    Unable to prove that call to reach_error is unreachable
 Reason: unable to decide satisfiability of path constraint. 
Possible FailurePath: 
[L20]              int A, R;
[L21]              long long u, v, r;
[L22]              A = __VERIFIER_nondet_int()
[L23]  CALL        assume_abort_if_not(A>=0 && A<=50)
[L9]   COND FALSE  !(!cond)
[L23]  RET         assume_abort_if_not(A>=0 && A<=50)
[L24]              R = __VERIFIER_nondet_int()
[L25]  CALL        assume_abort_if_not(R>=0 && R<=50)
[L9]   COND FALSE  !(!cond)
[L25]  RET         assume_abort_if_not(R>=0 && R<=50)
[L27]  CALL        assume_abort_if_not(((long long) R - 1) * ((long long) R - 1) < A)
[L9]   COND FALSE  !(!cond)
[L27]  RET         assume_abort_if_not(((long long) R - 1) * ((long long) R - 1) < A)
[L29]  CALL        assume_abort_if_not(A % 2 == 1)
[L9]   COND FALSE  !(!cond)
[L29]  RET         assume_abort_if_not(A % 2 == 1)
[L31]              u = ((long long) 2 * R) + 1
[L32]              v = 1
[L33]              r = ((long long) R * R) - A
[L35]  COND TRUE   1
[L36]  CALL        __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v)
[L12]  COND TRUE   !(cond)
[L14]              reach_error()

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 6 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 593.1ms, OverallIterations: 2, TraceHistogramMax: 4, EmptinessCheckTime: 11.4ms, AutomataDifference: 130.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 30 SDtfs, 18 SDslu, 3 SDs, 0 SdLazy, 9 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 54.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 73.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 34.4ms 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 could not prove your program: unable to determine feasibility of some traces
Received shutdown request...