/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound10.c
--------------------------------------------------------------------------------
This is Ultimate 0.2.1-dev-1a84f73
[2021-05-01 08:25:36,649 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2021-05-01 08:25:36,652 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2021-05-01 08:25:36,694 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-05-01 08:25:36,695 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-05-01 08:25:36,698 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-05-01 08:25:36,701 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2021-05-01 08:25:36,720 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2021-05-01 08:25:36,721 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-05-01 08:25:36,724 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-05-01 08:25:36,725 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-05-01 08:25:36,728 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-05-01 08:25:36,736 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
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[2021-05-01 08:25:36,739 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-05-01 08:25:36,740 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2021-05-01 08:25:36,743 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
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[2021-05-01 08:25:36,761 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
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[2021-05-01 08:25:36,763 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2021-05-01 08:25:36,764 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf
[2021-05-01 08:25:36,785 INFO L113 SettingsManager]: Loading preferences was successful
[2021-05-01 08:25:36,785 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2021-05-01 08:25:36,789 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-05-01 08:25:36,790 INFO L138 SettingsManager]: * sizeof long=4
[2021-05-01 08:25:36,790 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2021-05-01 08:25:36,790 INFO L138 SettingsManager]: * sizeof POINTER=4
[2021-05-01 08:25:36,790 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2021-05-01 08:25:36,790 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2021-05-01 08:25:36,790 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-05-01 08:25:36,790 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2021-05-01 08:25:36,791 INFO L138 SettingsManager]: * sizeof long double=12
[2021-05-01 08:25:36,791 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2021-05-01 08:25:36,792 INFO L138 SettingsManager]: * Use constant arrays=true
[2021-05-01 08:25:36,792 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2021-05-01 08:25:36,792 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-05-01 08:25:36,792 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2021-05-01 08:25:36,792 INFO L138 SettingsManager]: * To the following directory=./dump/
[2021-05-01 08:25:36,793 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2021-05-01 08:25:36,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-05-01 08:25:36,793 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-05-01 08:25:36,793 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation
[2021-05-01 08:25:36,793 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-05-01 08:25:36,793 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN
[2021-05-01 08:25:36,794 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2021-05-01 08:25:37,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2021-05-01 08:25:37,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-05-01 08:25:37,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-05-01 08:25:37,151 INFO L271 PluginConnector]: Initializing CDTParser...
[2021-05-01 08:25:37,152 INFO L275 PluginConnector]: CDTParser initialized
[2021-05-01 08:25:37,153 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound10.c
[2021-05-01 08:25:37,229 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00093370d/2817f77495114dbc85eb5edc0e561773/FLAGa3ceecb73
[2021-05-01 08:25:37,871 INFO L306 CDTParser]: Found 1 translation units.
[2021-05-01 08:25:37,872 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound10.c
[2021-05-01 08:25:37,878 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00093370d/2817f77495114dbc85eb5edc0e561773/FLAGa3ceecb73
[2021-05-01 08:25:38,245 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00093370d/2817f77495114dbc85eb5edc0e561773
[2021-05-01 08:25:38,247 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-05-01 08:25:38,249 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2021-05-01 08:25:38,255 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-05-01 08:25:38,255 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-05-01 08:25:38,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2021-05-01 08:25:38,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:25:38" (1/1) ...
[2021-05-01 08:25:38,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21e3bef4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:38, skipping insertion in model container
[2021-05-01 08:25:38,260 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:25:38" (1/1) ...
[2021-05-01 08:25:38,266 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2021-05-01 08:25:38,279 INFO L178 MainTranslator]: Built tables and reachable declarations
[2021-05-01 08:25:38,421 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/sqrt1-ll_valuebound10.c[520,533]
[2021-05-01 08:25:38,435 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-05-01 08:25:38,448 INFO L203 MainTranslator]: Completed pre-run
[2021-05-01 08:25:38,464 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/sqrt1-ll_valuebound10.c[520,533]
[2021-05-01 08:25:38,485 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-05-01 08:25:38,500 INFO L208 MainTranslator]: Completed translation
[2021-05-01 08:25:38,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:38 WrapperNode
[2021-05-01 08:25:38,501 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-05-01 08:25:38,503 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-05-01 08:25:38,504 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2021-05-01 08:25:38,504 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2021-05-01 08:25:38,528 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:38" (1/1) ...
[2021-05-01 08:25:38,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:38" (1/1) ...
[2021-05-01 08:25:38,535 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:38" (1/1) ...
[2021-05-01 08:25:38,535 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:38" (1/1) ...
[2021-05-01 08:25:38,547 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:38" (1/1) ...
[2021-05-01 08:25:38,552 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:38" (1/1) ...
[2021-05-01 08:25:38,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:38" (1/1) ...
[2021-05-01 08:25:38,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-05-01 08:25:38,570 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-05-01 08:25:38,570 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2021-05-01 08:25:38,571 INFO L275 PluginConnector]: RCFGBuilder initialized
[2021-05-01 08:25:38,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:38" (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
[2021-05-01 08:25:38,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2021-05-01 08:25:38,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-05-01 08:25:38,654 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error
[2021-05-01 08:25:38,654 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2021-05-01 08:25:38,654 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2021-05-01 08:25:38,654 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2021-05-01 08:25:38,654 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2021-05-01 08:25:38,655 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail
[2021-05-01 08:25:38,655 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error
[2021-05-01 08:25:38,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-05-01 08:25:38,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2021-05-01 08:25:38,656 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2021-05-01 08:25:38,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2021-05-01 08:25:38,656 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2021-05-01 08:25:38,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2021-05-01 08:25:38,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2021-05-01 08:25:38,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-05-01 08:25:38,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2021-05-01 08:25:38,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2021-05-01 08:25:38,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2021-05-01 08:25:38,945 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-05-01 08:25:38,946 INFO L299 CfgBuilder]: Removed 1 assume(true) statements.
[2021-05-01 08:25:38,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:25:38 BoogieIcfgContainer
[2021-05-01 08:25:38,947 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-05-01 08:25:38,948 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-05-01 08:25:38,964 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2021-05-01 08:25:38,968 INFO L275 PluginConnector]: TraceAbstraction initialized
[2021-05-01 08:25:38,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:25:38" (1/3) ...
[2021-05-01 08:25:38,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ae5bb42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:25:38, skipping insertion in model container
[2021-05-01 08:25:38,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:38" (2/3) ...
[2021-05-01 08:25:38,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ae5bb42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:25:38, skipping insertion in model container
[2021-05-01 08:25:38,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:25:38" (3/3) ...
[2021-05-01 08:25:38,970 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_valuebound10.c
[2021-05-01 08:25:38,975 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION
[2021-05-01 08:25:38,979 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2021-05-01 08:25:38,993 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-05-01 08:25:39,010 INFO L376 AbstractCegarLoop]: Interprodecural is true
[2021-05-01 08:25:39,010 INFO L377 AbstractCegarLoop]: Hoare is true
[2021-05-01 08:25:39,010 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation
[2021-05-01 08:25:39,010 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2021-05-01 08:25:39,010 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2021-05-01 08:25:39,010 INFO L381 AbstractCegarLoop]: Difference is false
[2021-05-01 08:25:39,011 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2021-05-01 08:25:39,011 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2021-05-01 08:25:39,022 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9)
[2021-05-01 08:25:39,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2021-05-01 08:25:39,028 INFO L511 BasicCegarLoop]: Found error trace
[2021-05-01 08:25:39,028 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-05-01 08:25:39,029 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-05-01 08:25:39,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-05-01 08:25:39,033 INFO L82 PathProgramCache]: Analyzing trace with hash 326851384, now seen corresponding path program 1 times
[2021-05-01 08:25:39,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-05-01 08:25:39,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526247787]
[2021-05-01 08:25:39,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-05-01 08:25:39,105 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-05-01 08:25:39,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:25:39,234 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:25:39,235 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:25:39,236 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:25:39,237 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:25:39,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-05-01 08:25:39,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:25:39,303 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:25:39,304 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:25:39,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2021-05-01 08:25:39,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:25:39,309 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:25:39,310 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:25:39,310 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:25:39,311 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:25:39,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-05-01 08:25:39,314 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2021-05-01 08:25:39,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526247787]
[2021-05-01 08:25:39,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [526247787] provided 1 perfect and 0 imperfect interpolant sequences
[2021-05-01 08:25:39,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-05-01 08:25:39,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-05-01 08:25:39,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149763860]
[2021-05-01 08:25:39,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states
[2021-05-01 08:25:39,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2021-05-01 08:25:39,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-05-01 08:25:39,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-05-01 08:25:39,333 INFO L87 Difference]: Start difference. First operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2)
[2021-05-01 08:25:39,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-05-01 08:25:39,484 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions.
[2021-05-01 08:25:39,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2021-05-01 08:25:39,487 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17
[2021-05-01 08:25:39,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-05-01 08:25:39,493 INFO L225 Difference]: With dead ends: 53
[2021-05-01 08:25:39,493 INFO L226 Difference]: Without dead ends: 26
[2021-05-01 08:25:39,497 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-05-01 08:25:39,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states.
[2021-05-01 08:25:39,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26.
[2021-05-01 08:25:39,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7)
[2021-05-01 08:25:39,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions.
[2021-05-01 08:25:39,538 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17
[2021-05-01 08:25:39,538 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-05-01 08:25:39,538 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions.
[2021-05-01 08:25:39,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2)
[2021-05-01 08:25:39,538 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions.
[2021-05-01 08:25:39,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2021-05-01 08:25:39,540 INFO L511 BasicCegarLoop]: Found error trace
[2021-05-01 08:25:39,540 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-05-01 08:25:39,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-05-01 08:25:39,540 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-05-01 08:25:39,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-05-01 08:25:39,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1008578050, now seen corresponding path program 1 times
[2021-05-01 08:25:39,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-05-01 08:25:39,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548691356]
[2021-05-01 08:25:39,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-05-01 08:25:39,548 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-05-01 08:25:39,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:25:39,596 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:25:39,597 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:25:39,602 INFO L142 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size
[2021-05-01 08:25:39,603 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13
[2021-05-01 08:25:39,611 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:25:39,611 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4
[2021-05-01 08:25:39,617 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:25:39,617 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4
[2021-05-01 08:25:39,623 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:25:39,624 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:25:39,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-05-01 08:25:39,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:25:39,662 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:25:39,662 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:25:39,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2021-05-01 08:25:39,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:25:39,666 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:25:39,667 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:25:39,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-05-01 08:25:39,667 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2021-05-01 08:25:39,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548691356]
[2021-05-01 08:25:39,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1548691356] provided 1 perfect and 0 imperfect interpolant sequences
[2021-05-01 08:25:39,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-05-01 08:25:39,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2021-05-01 08:25:39,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805410410]
[2021-05-01 08:25:39,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states
[2021-05-01 08:25:39,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2021-05-01 08:25:39,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2021-05-01 08:25:39,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2021-05-01 08:25:39,671 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)
[2021-05-01 08:25:40,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-05-01 08:25:40,078 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions.
[2021-05-01 08:25:40,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2021-05-01 08:25:40,078 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17
[2021-05-01 08:25:40,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-05-01 08:25:40,079 INFO L225 Difference]: With dead ends: 40
[2021-05-01 08:25:40,080 INFO L226 Difference]: Without dead ends: 38
[2021-05-01 08:25:40,081 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 181.5ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90
[2021-05-01 08:25:40,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states.
[2021-05-01 08:25:40,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36.
[2021-05-01 08:25:40,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11)
[2021-05-01 08:25:40,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions.
[2021-05-01 08:25:40,107 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 17
[2021-05-01 08:25:40,108 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-05-01 08:25:40,108 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions.
[2021-05-01 08:25:40,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)
[2021-05-01 08:25:40,108 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions.
[2021-05-01 08:25:40,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2021-05-01 08:25:40,109 INFO L511 BasicCegarLoop]: Found error trace
[2021-05-01 08:25:40,109 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-05-01 08:25:40,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-05-01 08:25:40,109 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-05-01 08:25:40,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-05-01 08:25:40,110 INFO L82 PathProgramCache]: Analyzing trace with hash -789682422, now seen corresponding path program 1 times
[2021-05-01 08:25:40,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-05-01 08:25:40,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143266083]
[2021-05-01 08:25:40,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-05-01 08:25:40,115 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-05-01 08:25:40,128 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility
[2021-05-01 08:25:40,129 INFO L620 BasicCegarLoop]: Counterexample might be feasible
[2021-05-01 08:25:40,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2021-05-01 08:25:40,145 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually.
[2021-05-01 08:25:40,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 08:25:40 BoogieIcfgContainer
[2021-05-01 08:25:40,146 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2021-05-01 08:25:40,147 INFO L168 Benchmark]: Toolchain (without parser) took 1897.14 ms. Allocated memory is still 212.9 MB. Free memory was 177.1 MB in the beginning and 79.7 MB in the end (delta: 97.5 MB). Peak memory consumption was 97.7 MB. Max. memory is 8.0 GB.
[2021-05-01 08:25:40,147 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 212.9 MB. Free memory is still 194.1 MB. There was no memory consumed. Max. memory is 8.0 GB.
[2021-05-01 08:25:40,148 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.03 ms. Allocated memory is still 212.9 MB. Free memory was 176.9 MB in the beginning and 167.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB.
[2021-05-01 08:25:40,148 INFO L168 Benchmark]: Boogie Preprocessor took 66.15 ms. Allocated memory is still 212.9 MB. Free memory was 167.2 MB in the beginning and 195.5 MB in the end (delta: -28.3 MB). Peak memory consumption was 7.6 MB. Max. memory is 8.0 GB.
[2021-05-01 08:25:40,149 INFO L168 Benchmark]: RCFGBuilder took 376.63 ms. Allocated memory is still 212.9 MB. Free memory was 195.5 MB in the beginning and 179.8 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB.
[2021-05-01 08:25:40,149 INFO L168 Benchmark]: TraceAbstraction took 1197.48 ms. Allocated memory is still 212.9 MB. Free memory was 179.3 MB in the beginning and 79.7 MB in the end (delta: 99.6 MB). Peak memory consumption was 99.6 MB. Max. memory is 8.0 GB.
[2021-05-01 08:25:40,151 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.14 ms. Allocated memory is still 212.9 MB. Free memory is still 194.1 MB. There was no memory consumed. Max. memory is 8.0 GB.
* CACSL2BoogieTranslator took 246.03 ms. Allocated memory is still 212.9 MB. Free memory was 176.9 MB in the beginning and 167.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB.
* Boogie Preprocessor took 66.15 ms. Allocated memory is still 212.9 MB. Free memory was 167.2 MB in the beginning and 195.5 MB in the end (delta: -28.3 MB). Peak memory consumption was 7.6 MB. Max. memory is 8.0 GB.
* RCFGBuilder took 376.63 ms. Allocated memory is still 212.9 MB. Free memory was 195.5 MB in the beginning and 179.8 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB.
* TraceAbstraction took 1197.48 ms. Allocated memory is still 212.9 MB. Free memory was 179.3 MB in the beginning and 79.7 MB in the end (delta: 99.6 MB). Peak memory consumption was 99.6 MB. 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:
[L21] int n;
[L22] long long a, s, t;
[L23] n = __VERIFIER_nondet_int()
[L24] CALL assume_abort_if_not(n>=0 && n<=10)
[L9] COND FALSE !(!cond)
[L24] RET assume_abort_if_not(n>=0 && n<=10)
[L26] a = 0
[L27] s = 1
[L28] t = 1
[L30] COND TRUE 1
[L31] CALL __VERIFIER_assert(t == 2*a + 1)
[L12] COND FALSE !(!(cond))
[L31] RET __VERIFIER_assert(t == 2*a + 1)
[L32] CALL __VERIFIER_assert(s == (a + 1) * (a + 1))
[L12] COND TRUE !(cond)
[L14] reach_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 6 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 1127.3ms, OverallIterations: 3, TraceHistogramMax: 2, EmptinessCheckTime: 10.9ms, AutomataDifference: 586.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 49 SDtfs, 40 SDslu, 32 SDs, 0 SdLazy, 99 SolverSat, 35 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 256.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 233.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=2, InterpolantAutomatonStates: 10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 53.2ms AutomataMinimizationTime, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces
Received shutdown request...