/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/loop-lit/gcnr2008.i
--------------------------------------------------------------------------------
This is Ultimate 0.2.1-dev-b7b32d2
[2021-02-22 02:23:27,901 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2021-02-22 02:23:27,904 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
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[2021-02-22 02:23:28,045 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
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[2021-02-22 02:23:28,108 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 02:23:28,135 INFO L113 SettingsManager]: Loading preferences was successful
[2021-02-22 02:23:28,136 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2021-02-22 02:23:28,142 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-02-22 02:23:28,143 INFO L138 SettingsManager]: * sizeof long=4
[2021-02-22 02:23:28,143 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2021-02-22 02:23:28,143 INFO L138 SettingsManager]: * sizeof POINTER=4
[2021-02-22 02:23:28,144 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2021-02-22 02:23:28,144 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2021-02-22 02:23:28,144 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-02-22 02:23:28,144 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2021-02-22 02:23:28,146 INFO L138 SettingsManager]: * sizeof long double=12
[2021-02-22 02:23:28,146 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2021-02-22 02:23:28,147 INFO L138 SettingsManager]: * Use constant arrays=true
[2021-02-22 02:23:28,147 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2021-02-22 02:23:28,148 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-02-22 02:23:28,148 INFO L138 SettingsManager]: * Size of a code block=SingleStatement
[2021-02-22 02:23:28,148 INFO L138 SettingsManager]: * To the following directory=./dump/
[2021-02-22 02:23:28,148 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2021-02-22 02:23:28,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-02-22 02:23:28,149 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-02-22 02:23:28,149 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation
[2021-02-22 02:23:28,149 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-02-22 02:23:28,149 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX
[2021-02-22 02:23:28,150 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2021-02-22 02:23:28,599 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2021-02-22 02:23:28,629 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-02-22 02:23:28,633 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-02-22 02:23:28,635 INFO L271 PluginConnector]: Initializing CDTParser...
[2021-02-22 02:23:28,638 INFO L275 PluginConnector]: CDTParser initialized
[2021-02-22 02:23:28,640 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gcnr2008.i
[2021-02-22 02:23:28,752 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6dffb06d/dad359458e1043c6b995789573bd4baf/FLAG684cb0f2d
[2021-02-22 02:23:29,474 INFO L306 CDTParser]: Found 1 translation units.
[2021-02-22 02:23:29,475 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gcnr2008.i
[2021-02-22 02:23:29,485 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6dffb06d/dad359458e1043c6b995789573bd4baf/FLAG684cb0f2d
[2021-02-22 02:23:29,856 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6dffb06d/dad359458e1043c6b995789573bd4baf
[2021-02-22 02:23:29,860 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-02-22 02:23:29,878 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2021-02-22 02:23:29,887 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-02-22 02:23:29,887 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-02-22 02:23:29,892 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2021-02-22 02:23:29,893 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:23:29" (1/1) ...
[2021-02-22 02:23:29,895 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3536f330 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:29, skipping insertion in model container
[2021-02-22 02:23:29,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:23:29" (1/1) ...
[2021-02-22 02:23:29,907 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2021-02-22 02:23:29,934 INFO L178 MainTranslator]: Built tables and reachable declarations
[2021-02-22 02:23:30,183 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gcnr2008.i[895,908]
[2021-02-22 02:23:30,201 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-02-22 02:23:30,215 INFO L203 MainTranslator]: Completed pre-run
[2021-02-22 02:23:30,235 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gcnr2008.i[895,908]
[2021-02-22 02:23:30,241 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-02-22 02:23:30,264 INFO L208 MainTranslator]: Completed translation
[2021-02-22 02:23:30,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:30 WrapperNode
[2021-02-22 02:23:30,265 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-02-22 02:23:30,267 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-02-22 02:23:30,267 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2021-02-22 02:23:30,267 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2021-02-22 02:23:30,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:30" (1/1) ...
[2021-02-22 02:23:30,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:30" (1/1) ...
[2021-02-22 02:23:30,296 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:30" (1/1) ...
[2021-02-22 02:23:30,296 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:30" (1/1) ...
[2021-02-22 02:23:30,305 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:30" (1/1) ...
[2021-02-22 02:23:30,311 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:30" (1/1) ...
[2021-02-22 02:23:30,313 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:30" (1/1) ...
[2021-02-22 02:23:30,316 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-02-22 02:23:30,318 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-02-22 02:23:30,318 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2021-02-22 02:23:30,319 INFO L275 PluginConnector]: RCFGBuilder initialized
[2021-02-22 02:23:30,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:30" (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 02:23:30,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2021-02-22 02:23:30,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-02-22 02:23:30,458 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error
[2021-02-22 02:23:30,458 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2021-02-22 02:23:30,458 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2021-02-22 02:23:30,458 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2021-02-22 02:23:30,459 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2021-02-22 02:23:30,459 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail
[2021-02-22 02:23:30,459 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail
[2021-02-22 02:23:30,459 INFO L130 BoogieDeclarations]: Found specification of procedure __assert
[2021-02-22 02:23:30,459 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error
[2021-02-22 02:23:30,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-02-22 02:23:30,460 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2021-02-22 02:23:30,460 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2021-02-22 02:23:30,460 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2021-02-22 02:23:30,460 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2021-02-22 02:23:30,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2021-02-22 02:23:30,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2021-02-22 02:23:30,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-02-22 02:23:30,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2021-02-22 02:23:30,461 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2021-02-22 02:23:30,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2021-02-22 02:23:31,079 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-02-22 02:23:31,079 INFO L299 CfgBuilder]: Removed 1 assume(true) statements.
[2021-02-22 02:23:31,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:23:31 BoogieIcfgContainer
[2021-02-22 02:23:31,082 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-02-22 02:23:31,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-02-22 02:23:31,086 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2021-02-22 02:23:31,091 INFO L275 PluginConnector]: TraceAbstraction initialized
[2021-02-22 02:23:31,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:23:29" (1/3) ...
[2021-02-22 02:23:31,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f902574 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:23:31, skipping insertion in model container
[2021-02-22 02:23:31,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:30" (2/3) ...
[2021-02-22 02:23:31,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f902574 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:23:31, skipping insertion in model container
[2021-02-22 02:23:31,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:23:31" (3/3) ...
[2021-02-22 02:23:31,096 INFO L111 eAbstractionObserver]: Analyzing ICFG gcnr2008.i
[2021-02-22 02:23:31,106 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION
[2021-02-22 02:23:31,114 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2021-02-22 02:23:31,142 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-02-22 02:23:31,172 INFO L376 AbstractCegarLoop]: Interprodecural is true
[2021-02-22 02:23:31,173 INFO L377 AbstractCegarLoop]: Hoare is true
[2021-02-22 02:23:31,173 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation
[2021-02-22 02:23:31,173 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2021-02-22 02:23:31,173 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2021-02-22 02:23:31,174 INFO L381 AbstractCegarLoop]: Difference is false
[2021-02-22 02:23:31,174 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2021-02-22 02:23:31,174 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2021-02-22 02:23:31,194 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states.
[2021-02-22 02:23:31,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2021-02-22 02:23:31,208 INFO L414 BasicCegarLoop]: Found error trace
[2021-02-22 02:23:31,209 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]
[2021-02-22 02:23:31,210 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-22 02:23:31,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-02-22 02:23:31,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1533429808, now seen corresponding path program 1 times
[2021-02-22 02:23:31,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-02-22 02:23:31,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132260151]
[2021-02-22 02:23:31,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-22 02:23:31,340 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-02-22 02:23:31,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-22 02:23:31,471 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 02:23:31,474 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-22 02:23:31,476 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 02:23:31,478 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-22 02:23:31,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-02-22 02:23:31,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-22 02:23:31,562 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 02:23:31,563 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-22 02:23:31,572 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 02:23:31,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132260151]
[2021-02-22 02:23:31,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-02-22 02:23:31,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-02-22 02:23:31,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836045196]
[2021-02-22 02:23:31,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states
[2021-02-22 02:23:31,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2021-02-22 02:23:31,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-02-22 02:23:31,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-02-22 02:23:31,611 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 3 states.
[2021-02-22 02:23:31,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-02-22 02:23:31,740 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions.
[2021-02-22 02:23:31,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2021-02-22 02:23:31,744 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24
[2021-02-22 02:23:31,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-02-22 02:23:31,755 INFO L225 Difference]: With dead ends: 65
[2021-02-22 02:23:31,755 INFO L226 Difference]: Without dead ends: 45
[2021-02-22 02:23:31,759 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 02:23:31,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states.
[2021-02-22 02:23:31,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45.
[2021-02-22 02:23:31,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states.
[2021-02-22 02:23:31,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions.
[2021-02-22 02:23:31,837 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 24
[2021-02-22 02:23:31,837 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-02-22 02:23:31,837 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions.
[2021-02-22 02:23:31,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2021-02-22 02:23:31,838 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions.
[2021-02-22 02:23:31,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2021-02-22 02:23:31,839 INFO L414 BasicCegarLoop]: Found error trace
[2021-02-22 02:23:31,839 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]
[2021-02-22 02:23:31,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-02-22 02:23:31,840 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-22 02:23:31,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-02-22 02:23:31,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1970055643, now seen corresponding path program 1 times
[2021-02-22 02:23:31,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-02-22 02:23:31,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616273003]
[2021-02-22 02:23:31,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-22 02:23:31,845 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-02-22 02:23:31,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2021-02-22 02:23:31,881 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2021-02-22 02:23:31,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2021-02-22 02:23:31,929 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2021-02-22 02:23:31,983 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2021-02-22 02:23:31,984 INFO L523 BasicCegarLoop]: Counterexample might be feasible
[2021-02-22 02:23:31,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-02-22 02:23:32,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 02:23:32 BoogieIcfgContainer
[2021-02-22 02:23:32,014 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2021-02-22 02:23:32,017 INFO L168 Benchmark]: Toolchain (without parser) took 2151.76 ms. Allocated memory is still 151.0 MB. Free memory was 128.0 MB in the beginning and 95.9 MB in the end (delta: 32.1 MB). Peak memory consumption was 31.3 MB. Max. memory is 8.0 GB.
[2021-02-22 02:23:32,018 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 151.0 MB. Free memory is still 124.2 MB. There was no memory consumed. Max. memory is 8.0 GB.
[2021-02-22 02:23:32,019 INFO L168 Benchmark]: CACSL2BoogieTranslator took 379.21 ms. Allocated memory is still 151.0 MB. Free memory was 126.8 MB in the beginning and 117.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB.
[2021-02-22 02:23:32,024 INFO L168 Benchmark]: Boogie Preprocessor took 49.96 ms. Allocated memory is still 151.0 MB. Free memory was 117.1 MB in the beginning and 115.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
[2021-02-22 02:23:32,028 INFO L168 Benchmark]: RCFGBuilder took 764.71 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 131.0 MB in the end (delta: -15.4 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB.
[2021-02-22 02:23:32,033 INFO L168 Benchmark]: TraceAbstraction took 928.84 ms. Allocated memory is still 151.0 MB. Free memory was 130.5 MB in the beginning and 95.9 MB in the end (delta: 34.6 MB). Peak memory consumption was 34.6 MB. Max. memory is 8.0 GB.
[2021-02-22 02:23:32,043 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.28 ms. Allocated memory is still 151.0 MB. Free memory is still 124.2 MB. There was no memory consumed. Max. memory is 8.0 GB.
* CACSL2BoogieTranslator took 379.21 ms. Allocated memory is still 151.0 MB. Free memory was 126.8 MB in the beginning and 117.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB.
* Boogie Preprocessor took 49.96 ms. Allocated memory is still 151.0 MB. Free memory was 117.1 MB in the beginning and 115.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
* RCFGBuilder took 764.71 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 131.0 MB in the end (delta: -15.4 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB.
* TraceAbstraction took 928.84 ms. Allocated memory is still 151.0 MB. Free memory was 130.5 MB in the beginning and 95.9 MB in the end (delta: 34.6 MB). Peak memory consumption was 34.6 MB. Max. memory is 8.0 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- CounterExampleResult [Line: 19]: a call to reach_error is reachable
a call to reach_error is reachable
We found a FailurePath:
[L25] int x,y,z,w;
[L26] EXPR w = 0
[L26] EXPR z = w = 0
[L26] EXPR y = z = w = 0
[L26] x = y = z = w = 0
[L27] COND FALSE !(__VERIFIER_nondet_int() && y < 10000)
[L42] CALL __VERIFIER_assert(x >= 4 && y <= 2)
[L18] COND TRUE !(cond)
[L19] reach_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 6 procedures, 63 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 55 SDtfs, 41 SDslu, 4 SDs, 0 SdLazy, 8 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be incorrect!
Received shutdown request...