/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/sum01-2.i
--------------------------------------------------------------------------------
This is Ultimate 0.2.1-dev-b7b32d2
[2021-02-22 02:21:02,731 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2021-02-22 02:21:02,734 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
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[2021-02-22 02:21:02,774 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
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[2021-02-22 02:21:02,797 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-02-22 02:21:02,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-02-22 02:21:02,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-02-22 02:21:02,803 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
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[2021-02-22 02:21:02,809 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
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[2021-02-22 02:21:02,831 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf
[2021-02-22 02:21:02,850 INFO L113 SettingsManager]: Loading preferences was successful
[2021-02-22 02:21:02,851 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2021-02-22 02:21:02,855 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-02-22 02:21:02,855 INFO L138 SettingsManager]: * sizeof long=4
[2021-02-22 02:21:02,856 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2021-02-22 02:21:02,856 INFO L138 SettingsManager]: * sizeof POINTER=4
[2021-02-22 02:21:02,856 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2021-02-22 02:21:02,856 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2021-02-22 02:21:02,857 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-02-22 02:21:02,857 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2021-02-22 02:21:02,858 INFO L138 SettingsManager]: * sizeof long double=12
[2021-02-22 02:21:02,859 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2021-02-22 02:21:02,859 INFO L138 SettingsManager]: * Use constant arrays=true
[2021-02-22 02:21:02,859 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2021-02-22 02:21:02,860 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-02-22 02:21:02,860 INFO L138 SettingsManager]: * Size of a code block=SingleStatement
[2021-02-22 02:21:02,861 INFO L138 SettingsManager]: * To the following directory=./dump/
[2021-02-22 02:21:02,861 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2021-02-22 02:21:02,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-02-22 02:21:02,861 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-02-22 02:21:02,862 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation
[2021-02-22 02:21:02,862 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-02-22 02:21:02,862 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX
[2021-02-22 02:21:02,862 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2021-02-22 02:21:03,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2021-02-22 02:21:03,327 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-02-22 02:21:03,330 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-02-22 02:21:03,332 INFO L271 PluginConnector]: Initializing CDTParser...
[2021-02-22 02:21:03,332 INFO L275 PluginConnector]: CDTParser initialized
[2021-02-22 02:21:03,334 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-2.i
[2021-02-22 02:21:03,421 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46904207f/45091b70f8f64f619443d3ba7776a2b2/FLAG1e5c83c95
[2021-02-22 02:21:04,149 INFO L306 CDTParser]: Found 1 translation units.
[2021-02-22 02:21:04,150 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-2.i
[2021-02-22 02:21:04,157 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46904207f/45091b70f8f64f619443d3ba7776a2b2/FLAG1e5c83c95
[2021-02-22 02:21:04,492 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46904207f/45091b70f8f64f619443d3ba7776a2b2
[2021-02-22 02:21:04,496 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-02-22 02:21:04,509 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2021-02-22 02:21:04,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-02-22 02:21:04,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-02-22 02:21:04,515 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2021-02-22 02:21:04,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:21:04" (1/1) ...
[2021-02-22 02:21:04,517 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2aa12103 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:04, skipping insertion in model container
[2021-02-22 02:21:04,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:21:04" (1/1) ...
[2021-02-22 02:21:04,526 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2021-02-22 02:21:04,542 INFO L178 MainTranslator]: Built tables and reachable declarations
[2021-02-22 02:21:04,695 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/sum01-2.i[849,862]
[2021-02-22 02:21:04,707 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-02-22 02:21:04,717 INFO L203 MainTranslator]: Completed pre-run
[2021-02-22 02:21:04,731 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/sum01-2.i[849,862]
[2021-02-22 02:21:04,734 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-02-22 02:21:04,751 INFO L208 MainTranslator]: Completed translation
[2021-02-22 02:21:04,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:04 WrapperNode
[2021-02-22 02:21:04,751 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-02-22 02:21:04,753 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-02-22 02:21:04,753 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2021-02-22 02:21:04,753 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2021-02-22 02:21:04,766 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:04" (1/1) ...
[2021-02-22 02:21:04,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:04" (1/1) ...
[2021-02-22 02:21:04,773 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:04" (1/1) ...
[2021-02-22 02:21:04,773 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:04" (1/1) ...
[2021-02-22 02:21:04,779 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:04" (1/1) ...
[2021-02-22 02:21:04,783 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:04" (1/1) ...
[2021-02-22 02:21:04,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:04" (1/1) ...
[2021-02-22 02:21:04,787 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-02-22 02:21:04,788 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-02-22 02:21:04,789 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2021-02-22 02:21:04,789 INFO L275 PluginConnector]: RCFGBuilder initialized
[2021-02-22 02:21:04,790 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:04" (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
[2021-02-22 02:21:04,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2021-02-22 02:21:04,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-02-22 02:21:04,912 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error
[2021-02-22 02:21:04,912 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2021-02-22 02:21:04,912 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2021-02-22 02:21:04,912 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2021-02-22 02:21:04,912 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail
[2021-02-22 02:21:04,913 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail
[2021-02-22 02:21:04,913 INFO L130 BoogieDeclarations]: Found specification of procedure __assert
[2021-02-22 02:21:04,913 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error
[2021-02-22 02:21:04,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-02-22 02:21:04,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2021-02-22 02:21:04,914 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2021-02-22 02:21:04,914 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2021-02-22 02:21:04,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2021-02-22 02:21:04,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2021-02-22 02:21:04,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-02-22 02:21:04,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2021-02-22 02:21:04,915 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2021-02-22 02:21:04,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2021-02-22 02:21:05,195 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-02-22 02:21:05,196 INFO L299 CfgBuilder]: Removed 1 assume(true) statements.
[2021-02-22 02:21:05,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:21:05 BoogieIcfgContainer
[2021-02-22 02:21:05,198 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-02-22 02:21:05,200 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-02-22 02:21:05,201 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2021-02-22 02:21:05,205 INFO L275 PluginConnector]: TraceAbstraction initialized
[2021-02-22 02:21:05,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:21:04" (1/3) ...
[2021-02-22 02:21:05,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55a59657 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:21:05, skipping insertion in model container
[2021-02-22 02:21:05,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:04" (2/3) ...
[2021-02-22 02:21:05,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55a59657 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:21:05, skipping insertion in model container
[2021-02-22 02:21:05,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:21:05" (3/3) ...
[2021-02-22 02:21:05,209 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01-2.i
[2021-02-22 02:21:05,217 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION
[2021-02-22 02:21:05,223 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2021-02-22 02:21:05,246 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-02-22 02:21:05,273 INFO L376 AbstractCegarLoop]: Interprodecural is true
[2021-02-22 02:21:05,273 INFO L377 AbstractCegarLoop]: Hoare is true
[2021-02-22 02:21:05,273 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation
[2021-02-22 02:21:05,273 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2021-02-22 02:21:05,274 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2021-02-22 02:21:05,274 INFO L381 AbstractCegarLoop]: Difference is false
[2021-02-22 02:21:05,274 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2021-02-22 02:21:05,274 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2021-02-22 02:21:05,337 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states.
[2021-02-22 02:21:05,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2021-02-22 02:21:05,349 INFO L414 BasicCegarLoop]: Found error trace
[2021-02-22 02:21:05,350 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-02-22 02:21:05,351 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-22 02:21:05,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-02-22 02:21:05,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1347732111, now seen corresponding path program 1 times
[2021-02-22 02:21:05,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-02-22 02:21:05,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102037728]
[2021-02-22 02:21:05,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-22 02:21:05,453 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-02-22 02:21:05,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-22 02:21:05,574 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 02:21:05,577 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-22 02:21:05,578 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 02:21:05,580 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-22 02:21:05,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-02-22 02:21:05,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-22 02:21:05,694 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 02:21:05,695 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-22 02:21:05,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-02-22 02:21:05,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102037728]
[2021-02-22 02:21:05,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-02-22 02:21:05,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-02-22 02:21:05,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462266813]
[2021-02-22 02:21:05,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states
[2021-02-22 02:21:05,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2021-02-22 02:21:05,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-02-22 02:21:05,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-02-22 02:21:05,730 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states.
[2021-02-22 02:21:05,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-02-22 02:21:05,826 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions.
[2021-02-22 02:21:05,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2021-02-22 02:21:05,829 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23
[2021-02-22 02:21:05,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-02-22 02:21:05,838 INFO L225 Difference]: With dead ends: 47
[2021-02-22 02:21:05,838 INFO L226 Difference]: Without dead ends: 28
[2021-02-22 02:21:05,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-02-22 02:21:05,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states.
[2021-02-22 02:21:05,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28.
[2021-02-22 02:21:05,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states.
[2021-02-22 02:21:05,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions.
[2021-02-22 02:21:05,892 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 23
[2021-02-22 02:21:05,893 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-02-22 02:21:05,893 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions.
[2021-02-22 02:21:05,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2021-02-22 02:21:05,894 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions.
[2021-02-22 02:21:05,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2021-02-22 02:21:05,895 INFO L414 BasicCegarLoop]: Found error trace
[2021-02-22 02:21:05,895 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-02-22 02:21:05,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-02-22 02:21:05,895 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-22 02:21:05,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-02-22 02:21:05,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1339420422, now seen corresponding path program 1 times
[2021-02-22 02:21:05,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-02-22 02:21:05,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974268036]
[2021-02-22 02:21:05,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-22 02:21:05,900 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-02-22 02:21:05,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-22 02:21:05,971 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 02:21:05,972 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-22 02:21:05,982 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 02:21:05,984 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9
[2021-02-22 02:21:05,995 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 02:21:05,996 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4
[2021-02-22 02:21:06,005 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 02:21:06,006 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4
[2021-02-22 02:21:06,024 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 02:21:06,024 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-22 02:21:06,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-02-22 02:21:06,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-22 02:21:06,078 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 02:21:06,079 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-22 02:21:06,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-02-22 02:21:06,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974268036]
[2021-02-22 02:21:06,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-02-22 02:21:06,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2021-02-22 02:21:06,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319189525]
[2021-02-22 02:21:06,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states
[2021-02-22 02:21:06,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2021-02-22 02:21:06,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2021-02-22 02:21:06,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2021-02-22 02:21:06,086 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 6 states.
[2021-02-22 02:21:06,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-02-22 02:21:06,299 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions.
[2021-02-22 02:21:06,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2021-02-22 02:21:06,300 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23
[2021-02-22 02:21:06,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-02-22 02:21:06,302 INFO L225 Difference]: With dead ends: 35
[2021-02-22 02:21:06,302 INFO L226 Difference]: Without dead ends: 30
[2021-02-22 02:21:06,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72
[2021-02-22 02:21:06,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states.
[2021-02-22 02:21:06,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29.
[2021-02-22 02:21:06,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states.
[2021-02-22 02:21:06,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions.
[2021-02-22 02:21:06,316 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 23
[2021-02-22 02:21:06,317 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-02-22 02:21:06,317 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions.
[2021-02-22 02:21:06,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states.
[2021-02-22 02:21:06,317 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions.
[2021-02-22 02:21:06,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29
[2021-02-22 02:21:06,318 INFO L414 BasicCegarLoop]: Found error trace
[2021-02-22 02:21:06,319 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]
[2021-02-22 02:21:06,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-02-22 02:21:06,319 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-22 02:21:06,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-02-22 02:21:06,320 INFO L82 PathProgramCache]: Analyzing trace with hash -924971526, now seen corresponding path program 1 times
[2021-02-22 02:21:06,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-02-22 02:21:06,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573658726]
[2021-02-22 02:21:06,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-22 02:21:06,344 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 02:21:06,358 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15
[2021-02-22 02:21:06,365 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 02:21:06,367 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15
[2021-02-22 02:21:06,374 WARN L141 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size
[2021-02-22 02:21:06,389 WARN L147 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size 13
[2021-02-22 02:21:06,395 WARN L141 QuantifierPusher]: treesize reduction 8, result has 81.8 percent of original size
[2021-02-22 02:21:06,399 WARN L147 QuantifierPusher]: treesize reduction 8, result has 81.8 percent of original size 36
[2021-02-22 02:21:06,400 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE
[2021-02-22 02:21:06,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2021-02-22 02:21:06,427 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2021-02-22 02:21:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2021-02-22 02:21:06,452 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2021-02-22 02:21:06,479 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2021-02-22 02:21:06,479 INFO L523 BasicCegarLoop]: Counterexample might be feasible
[2021-02-22 02:21:06,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2021-02-22 02:21:06,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 02:21:06 BoogieIcfgContainer
[2021-02-22 02:21:06,494 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2021-02-22 02:21:06,495 INFO L168 Benchmark]: Toolchain (without parser) took 1997.60 ms. Allocated memory is still 163.6 MB. Free memory was 140.1 MB in the beginning and 77.1 MB in the end (delta: 63.1 MB). Peak memory consumption was 64.7 MB. Max. memory is 8.0 GB.
[2021-02-22 02:21:06,496 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 163.6 MB. Free memory is still 135.8 MB. There was no memory consumed. Max. memory is 8.0 GB.
[2021-02-22 02:21:06,497 INFO L168 Benchmark]: CACSL2BoogieTranslator took 241.00 ms. Allocated memory is still 163.6 MB. Free memory was 139.1 MB in the beginning and 129.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB.
[2021-02-22 02:21:06,498 INFO L168 Benchmark]: Boogie Preprocessor took 34.29 ms. Allocated memory is still 163.6 MB. Free memory was 129.5 MB in the beginning and 128.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
[2021-02-22 02:21:06,499 INFO L168 Benchmark]: RCFGBuilder took 410.73 ms. Allocated memory is still 163.6 MB. Free memory was 128.0 MB in the beginning and 113.8 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB.
[2021-02-22 02:21:06,500 INFO L168 Benchmark]: TraceAbstraction took 1293.72 ms. Allocated memory is still 163.6 MB. Free memory was 113.3 MB in the beginning and 77.1 MB in the end (delta: 36.3 MB). Peak memory consumption was 37.4 MB. Max. memory is 8.0 GB.
[2021-02-22 02:21:06,505 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.18 ms. Allocated memory is still 163.6 MB. Free memory is still 135.8 MB. There was no memory consumed. Max. memory is 8.0 GB.
* CACSL2BoogieTranslator took 241.00 ms. Allocated memory is still 163.6 MB. Free memory was 139.1 MB in the beginning and 129.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB.
* Boogie Preprocessor took 34.29 ms. Allocated memory is still 163.6 MB. Free memory was 129.5 MB in the beginning and 128.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
* RCFGBuilder took 410.73 ms. Allocated memory is still 163.6 MB. Free memory was 128.0 MB in the beginning and 113.8 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB.
* TraceAbstraction took 1293.72 ms. Allocated memory is still 163.6 MB. Free memory was 113.3 MB in the beginning and 77.1 MB in the end (delta: 36.3 MB). Peak memory consumption was 37.4 MB. Max. memory is 8.0 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- CounterExampleResult [Line: 17]: a call to reach_error is reachable
a call to reach_error is reachable
We found a FailurePath:
[L23] int i, n=__VERIFIER_nondet_int(), sn=0;
[L23] int i, n=__VERIFIER_nondet_int(), sn=0;
[L23] int i, n=__VERIFIER_nondet_int(), sn=0;
[L24] COND FALSE !(!(n < 1000 && n >= -1000))
[L25] i=1
[L25] COND TRUE i<=n
[L26] sn = sn + (2)
[L25] i++
[L25] COND FALSE !(i<=n)
[L28] CALL __VERIFIER_assert(sn==n*(2) || sn == 0)
[L16] COND TRUE !(cond)
[L17] reach_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 5 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 58 SDtfs, 42 SDslu, 42 SDs, 0 SdLazy, 65 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 1 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 proved your program to be incorrect!
Received shutdown request...