/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/ldv-regression/test24-2.c
--------------------------------------------------------------------------------
This is Ultimate 0.2.1-dev-b7b32d2
[2021-02-22 01:57:45,210 INFO L177 SettingsManager]: Resetting all preferences to default values...
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[2021-02-22 01:57:45,272 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
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[2021-02-22 01:57:45,337 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 01:57:45,365 INFO L113 SettingsManager]: Loading preferences was successful
[2021-02-22 01:57:45,366 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2021-02-22 01:57:45,371 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-02-22 01:57:45,372 INFO L138 SettingsManager]: * sizeof long=4
[2021-02-22 01:57:45,372 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2021-02-22 01:57:45,372 INFO L138 SettingsManager]: * sizeof POINTER=4
[2021-02-22 01:57:45,373 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2021-02-22 01:57:45,373 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2021-02-22 01:57:45,373 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-02-22 01:57:45,373 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2021-02-22 01:57:45,375 INFO L138 SettingsManager]: * sizeof long double=12
[2021-02-22 01:57:45,375 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2021-02-22 01:57:45,376 INFO L138 SettingsManager]: * Use constant arrays=true
[2021-02-22 01:57:45,376 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2021-02-22 01:57:45,376 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-02-22 01:57:45,376 INFO L138 SettingsManager]: * Size of a code block=SingleStatement
[2021-02-22 01:57:45,377 INFO L138 SettingsManager]: * To the following directory=./dump/
[2021-02-22 01:57:45,377 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2021-02-22 01:57:45,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-02-22 01:57:45,377 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-02-22 01:57:45,378 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation
[2021-02-22 01:57:45,378 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-02-22 01:57:45,378 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX
[2021-02-22 01:57:45,378 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2021-02-22 01:57:45,822 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2021-02-22 01:57:45,873 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-02-22 01:57:45,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-02-22 01:57:45,878 INFO L271 PluginConnector]: Initializing CDTParser...
[2021-02-22 01:57:45,879 INFO L275 PluginConnector]: CDTParser initialized
[2021-02-22 01:57:45,880 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-2.c
[2021-02-22 01:57:45,975 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad1faf9c9/f260d872c4cd43aa9a2ec06d06f26986/FLAG7eebaeab2
[2021-02-22 01:57:46,604 INFO L306 CDTParser]: Found 1 translation units.
[2021-02-22 01:57:46,604 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test24-2.c
[2021-02-22 01:57:46,612 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad1faf9c9/f260d872c4cd43aa9a2ec06d06f26986/FLAG7eebaeab2
[2021-02-22 01:57:46,987 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad1faf9c9/f260d872c4cd43aa9a2ec06d06f26986
[2021-02-22 01:57:46,990 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-02-22 01:57:47,003 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2021-02-22 01:57:47,004 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-02-22 01:57:47,005 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-02-22 01:57:47,009 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2021-02-22 01:57:47,010 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:57:46" (1/1) ...
[2021-02-22 01:57:47,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2791b517 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:47, skipping insertion in model container
[2021-02-22 01:57:47,012 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:57:46" (1/1) ...
[2021-02-22 01:57:47,020 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2021-02-22 01:57:47,036 INFO L178 MainTranslator]: Built tables and reachable declarations
[2021-02-22 01:57:47,233 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test24-2.c[807,820]
[2021-02-22 01:57:47,238 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-02-22 01:57:47,248 INFO L203 MainTranslator]: Completed pre-run
[2021-02-22 01:57:47,285 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test24-2.c[807,820]
[2021-02-22 01:57:47,292 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-02-22 01:57:47,316 INFO L208 MainTranslator]: Completed translation
[2021-02-22 01:57:47,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:47 WrapperNode
[2021-02-22 01:57:47,317 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-02-22 01:57:47,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-02-22 01:57:47,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2021-02-22 01:57:47,320 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2021-02-22 01:57:47,335 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:47" (1/1) ...
[2021-02-22 01:57:47,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:47" (1/1) ...
[2021-02-22 01:57:47,346 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:47" (1/1) ...
[2021-02-22 01:57:47,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:47" (1/1) ...
[2021-02-22 01:57:47,369 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:47" (1/1) ...
[2021-02-22 01:57:47,377 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:47" (1/1) ...
[2021-02-22 01:57:47,387 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:47" (1/1) ...
[2021-02-22 01:57:47,391 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-02-22 01:57:47,393 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-02-22 01:57:47,394 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2021-02-22 01:57:47,394 INFO L275 PluginConnector]: RCFGBuilder initialized
[2021-02-22 01:57:47,395 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:47" (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 01:57:47,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2021-02-22 01:57:47,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-02-22 01:57:47,546 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error
[2021-02-22 01:57:47,546 INFO L138 BoogieDeclarations]: Found implementation of procedure check
[2021-02-22 01:57:47,547 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2021-02-22 01:57:47,547 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2021-02-22 01:57:47,547 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail
[2021-02-22 01:57:47,547 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error
[2021-02-22 01:57:47,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-02-22 01:57:47,549 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2021-02-22 01:57:47,549 INFO L130 BoogieDeclarations]: Found specification of procedure check
[2021-02-22 01:57:47,549 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2021-02-22 01:57:47,550 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2021-02-22 01:57:47,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2021-02-22 01:57:47,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2021-02-22 01:57:47,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2021-02-22 01:57:47,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2021-02-22 01:57:47,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-02-22 01:57:48,178 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-02-22 01:57:48,178 INFO L299 CfgBuilder]: Removed 2 assume(true) statements.
[2021-02-22 01:57:48,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:57:48 BoogieIcfgContainer
[2021-02-22 01:57:48,181 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-02-22 01:57:48,183 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-02-22 01:57:48,183 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2021-02-22 01:57:48,186 INFO L275 PluginConnector]: TraceAbstraction initialized
[2021-02-22 01:57:48,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 01:57:46" (1/3) ...
[2021-02-22 01:57:48,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21264a04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:57:48, skipping insertion in model container
[2021-02-22 01:57:48,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:47" (2/3) ...
[2021-02-22 01:57:48,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21264a04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:57:48, skipping insertion in model container
[2021-02-22 01:57:48,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:57:48" (3/3) ...
[2021-02-22 01:57:48,191 INFO L111 eAbstractionObserver]: Analyzing ICFG test24-2.c
[2021-02-22 01:57:48,198 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION
[2021-02-22 01:57:48,221 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2021-02-22 01:57:48,243 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-02-22 01:57:48,269 INFO L376 AbstractCegarLoop]: Interprodecural is true
[2021-02-22 01:57:48,269 INFO L377 AbstractCegarLoop]: Hoare is true
[2021-02-22 01:57:48,269 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation
[2021-02-22 01:57:48,270 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2021-02-22 01:57:48,270 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2021-02-22 01:57:48,270 INFO L381 AbstractCegarLoop]: Difference is false
[2021-02-22 01:57:48,270 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2021-02-22 01:57:48,270 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2021-02-22 01:57:48,290 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states.
[2021-02-22 01:57:48,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43
[2021-02-22 01:57:48,302 INFO L414 BasicCegarLoop]: Found error trace
[2021-02-22 01:57:48,304 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-02-22 01:57:48,304 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-22 01:57:48,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-02-22 01:57:48,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1271161021, now seen corresponding path program 1 times
[2021-02-22 01:57:48,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-02-22 01:57:48,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541512351]
[2021-02-22 01:57:48,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-22 01:57:48,407 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-02-22 01:57:48,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-22 01:57:48,540 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 01:57:48,542 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-22 01:57:48,544 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 01:57:48,545 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-22 01:57:48,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-02-22 01:57:48,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-22 01:57:48,702 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 01:57:48,705 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-22 01:57:48,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30
[2021-02-22 01:57:48,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-22 01:57:48,739 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 01:57:48,741 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-22 01:57:48,755 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 01:57:48,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541512351]
[2021-02-22 01:57:48,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-02-22 01:57:48,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-02-22 01:57:48,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960157616]
[2021-02-22 01:57:48,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states
[2021-02-22 01:57:48,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2021-02-22 01:57:48,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-02-22 01:57:48,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-02-22 01:57:48,789 INFO L87 Difference]: Start difference. First operand 70 states. Second operand 3 states.
[2021-02-22 01:57:49,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-02-22 01:57:49,073 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions.
[2021-02-22 01:57:49,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2021-02-22 01:57:49,075 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42
[2021-02-22 01:57:49,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-02-22 01:57:49,085 INFO L225 Difference]: With dead ends: 108
[2021-02-22 01:57:49,085 INFO L226 Difference]: Without dead ends: 58
[2021-02-22 01:57:49,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 01:57:49,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states.
[2021-02-22 01:57:49,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58.
[2021-02-22 01:57:49,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states.
[2021-02-22 01:57:49,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions.
[2021-02-22 01:57:49,142 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 42
[2021-02-22 01:57:49,143 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-02-22 01:57:49,143 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions.
[2021-02-22 01:57:49,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2021-02-22 01:57:49,143 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions.
[2021-02-22 01:57:49,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45
[2021-02-22 01:57:49,145 INFO L414 BasicCegarLoop]: Found error trace
[2021-02-22 01:57:49,145 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-02-22 01:57:49,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-02-22 01:57:49,146 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-22 01:57:49,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-02-22 01:57:49,147 INFO L82 PathProgramCache]: Analyzing trace with hash -645916160, now seen corresponding path program 1 times
[2021-02-22 01:57:49,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-02-22 01:57:49,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413203150]
[2021-02-22 01:57:49,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-22 01:57:49,150 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-02-22 01:57:49,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-22 01:57:49,202 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 01:57:49,204 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-22 01:57:49,206 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 01:57:49,208 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3
[2021-02-22 01:57:49,219 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 01:57:49,220 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-22 01:57:49,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-02-22 01:57:49,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-22 01:57:49,307 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 01:57:49,309 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-22 01:57:49,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32
[2021-02-22 01:57:49,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-22 01:57:49,319 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 01:57:49,320 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-22 01:57:49,326 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 01:57:49,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413203150]
[2021-02-22 01:57:49,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-02-22 01:57:49,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2021-02-22 01:57:49,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208729473]
[2021-02-22 01:57:49,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states
[2021-02-22 01:57:49,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2021-02-22 01:57:49,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2021-02-22 01:57:49,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2021-02-22 01:57:49,330 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 4 states.
[2021-02-22 01:57:49,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-02-22 01:57:49,543 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions.
[2021-02-22 01:57:49,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states.
[2021-02-22 01:57:49,544 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44
[2021-02-22 01:57:49,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-02-22 01:57:49,549 INFO L225 Difference]: With dead ends: 97
[2021-02-22 01:57:49,549 INFO L226 Difference]: Without dead ends: 67
[2021-02-22 01:57:49,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2021-02-22 01:57:49,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states.
[2021-02-22 01:57:49,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59.
[2021-02-22 01:57:49,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states.
[2021-02-22 01:57:49,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions.
[2021-02-22 01:57:49,584 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 44
[2021-02-22 01:57:49,585 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-02-22 01:57:49,586 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions.
[2021-02-22 01:57:49,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states.
[2021-02-22 01:57:49,587 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions.
[2021-02-22 01:57:49,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55
[2021-02-22 01:57:49,590 INFO L414 BasicCegarLoop]: Found error trace
[2021-02-22 01:57:49,592 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-02-22 01:57:49,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-02-22 01:57:49,592 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-22 01:57:49,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-02-22 01:57:49,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1721582074, now seen corresponding path program 1 times
[2021-02-22 01:57:49,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-02-22 01:57:49,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724561539]
[2021-02-22 01:57:49,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-22 01:57:49,645 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 01:57:49,661 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49
[2021-02-22 01:57:49,681 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 01:57:49,685 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49
[2021-02-22 01:57:49,709 WARN L141 QuantifierPusher]: treesize reduction 4, result has 86.7 percent of original size
[2021-02-22 01:57:49,724 INFO L723 QuantifierPusher]: Distributing 5 disjuncts over 3 conjuncts
[2021-02-22 01:57:49,731 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 01:57:49,732 WARN L159 QuantifierPusher]: Ignoring assumption.
[2021-02-22 01:57:49,735 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 01:57:49,743 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58
[2021-02-22 01:57:49,748 WARN L147 QuantifierPusher]: treesize reduction 4, result has 86.7 percent of original size 26
[2021-02-22 01:57:49,755 WARN L141 QuantifierPusher]: treesize reduction 11, result has 86.4 percent of original size
[2021-02-22 01:57:49,760 WARN L147 QuantifierPusher]: treesize reduction 11, result has 86.4 percent of original size 70
[2021-02-22 01:57:49,761 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE
[2021-02-22 01:57:49,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2021-02-22 01:57:49,816 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2021-02-22 01:57:49,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2021-02-22 01:57:49,888 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2021-02-22 01:57:49,948 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2021-02-22 01:57:49,949 INFO L523 BasicCegarLoop]: Counterexample might be feasible
[2021-02-22 01:57:49,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2021-02-22 01:57:49,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 01:57:49 BoogieIcfgContainer
[2021-02-22 01:57:49,975 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2021-02-22 01:57:49,977 INFO L168 Benchmark]: Toolchain (without parser) took 2984.40 ms. Allocated memory was 166.7 MB in the beginning and 207.6 MB in the end (delta: 40.9 MB). Free memory was 142.9 MB in the beginning and 168.9 MB in the end (delta: -26.0 MB). Peak memory consumption was 15.6 MB. Max. memory is 8.0 GB.
[2021-02-22 01:57:49,978 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 166.7 MB. Free memory is still 141.3 MB. There was no memory consumed. Max. memory is 8.0 GB.
[2021-02-22 01:57:49,980 INFO L168 Benchmark]: CACSL2BoogieTranslator took 313.25 ms. Allocated memory is still 166.7 MB. Free memory was 142.0 MB in the beginning and 132.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB.
[2021-02-22 01:57:49,981 INFO L168 Benchmark]: Boogie Preprocessor took 72.87 ms. Allocated memory is still 166.7 MB. Free memory was 132.1 MB in the beginning and 130.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB.
[2021-02-22 01:57:49,982 INFO L168 Benchmark]: RCFGBuilder took 787.39 ms. Allocated memory is still 166.7 MB. Free memory was 130.6 MB in the beginning and 148.0 MB in the end (delta: -17.4 MB). Peak memory consumption was 21.9 MB. Max. memory is 8.0 GB.
[2021-02-22 01:57:49,988 INFO L168 Benchmark]: TraceAbstraction took 1792.69 ms. Allocated memory was 166.7 MB in the beginning and 207.6 MB in the end (delta: 40.9 MB). Free memory was 148.0 MB in the beginning and 168.9 MB in the end (delta: -20.9 MB). Peak memory consumption was 20.0 MB. Max. memory is 8.0 GB.
[2021-02-22 01:57:50,000 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.21 ms. Allocated memory is still 166.7 MB. Free memory is still 141.3 MB. There was no memory consumed. Max. memory is 8.0 GB.
* CACSL2BoogieTranslator took 313.25 ms. Allocated memory is still 166.7 MB. Free memory was 142.0 MB in the beginning and 132.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB.
* Boogie Preprocessor took 72.87 ms. Allocated memory is still 166.7 MB. Free memory was 132.1 MB in the beginning and 130.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB.
* RCFGBuilder took 787.39 ms. Allocated memory is still 166.7 MB. Free memory was 130.6 MB in the beginning and 148.0 MB in the end (delta: -17.4 MB). Peak memory consumption was 21.9 MB. Max. memory is 8.0 GB.
* TraceAbstraction took 1792.69 ms. Allocated memory was 166.7 MB in the beginning and 207.6 MB in the end (delta: 40.9 MB). Free memory was 148.0 MB in the beginning and 168.9 MB in the end (delta: -20.9 MB). Peak memory consumption was 20.0 MB. Max. memory is 8.0 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- CounterExampleResult [Line: 39]: a call to reach_error is reachable
a call to reach_error is reachable
We found a FailurePath:
[L17] struct dummy ad1[20], *ad2;
[L18] int i, j, *pa;
[L19] j=0
[L19] COND TRUE j<20
[L20] ad1[j].a = __VERIFIER_nondet_int()
[L21] ad1[j].b = __VERIFIER_nondet_int()
[L19] j++
[L19] COND FALSE !(j<20)
[L23] i = __VERIFIER_nondet_int()
[L24] COND TRUE i >= 0 && i < 10
[L25] ad2 = ad1
[L26] ad1[i].a = i
[L27] pa = &ad1[i].a
[L28] EXPR ad2[i].a
[L28] i = ad2[i].a + 10
[L29] EXPR \read(*pa)
[L29] COND FALSE !(i < *pa)
[L32] CALL, EXPR check(ad1, i)
[L12] EXPR ad1[b].a
[L12] return ad1[b].a == b;
[L32] RET, EXPR check(ad1, i)
[L32] COND TRUE !check(ad1, i)
[L39] reach_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 5 procedures, 73 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.6s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 121 SDtfs, 20 SDslu, 52 SDs, 0 SdLazy, 121 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred 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, 8 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...