/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/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-lit/gj2007b.i
--------------------------------------------------------------------------------
This is Ultimate 0.2.1-dev-b7b32d2
[2021-02-21 21:28:18,608 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2021-02-21 21:28:18,616 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
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[2021-02-21 21:28:18,812 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-02-21 21:28:18,814 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-02-21 21:28:18,818 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
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[2021-02-21 21:28:18,863 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf
[2021-02-21 21:28:18,886 INFO L113 SettingsManager]: Loading preferences was successful
[2021-02-21 21:28:18,887 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2021-02-21 21:28:18,892 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-02-21 21:28:18,892 INFO L138 SettingsManager]: * sizeof long=4
[2021-02-21 21:28:18,893 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2021-02-21 21:28:18,893 INFO L138 SettingsManager]: * sizeof POINTER=4
[2021-02-21 21:28:18,893 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2021-02-21 21:28:18,894 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2021-02-21 21:28:18,894 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-02-21 21:28:18,894 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2021-02-21 21:28:18,894 INFO L138 SettingsManager]: * sizeof long double=12
[2021-02-21 21:28:18,894 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2021-02-21 21:28:18,895 INFO L138 SettingsManager]: * Use constant arrays=true
[2021-02-21 21:28:18,895 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2021-02-21 21:28:18,895 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-02-21 21:28:18,895 INFO L138 SettingsManager]: * Size of a code block=SingleStatement
[2021-02-21 21:28:18,896 INFO L138 SettingsManager]: * To the following directory=./dump/
[2021-02-21 21:28:18,896 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2021-02-21 21:28:18,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-02-21 21:28:18,897 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-02-21 21:28:18,897 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation
[2021-02-21 21:28:18,897 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-02-21 21:28:18,898 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2021-02-21 21:28:19,539 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2021-02-21 21:28:19,604 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-02-21 21:28:19,612 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-02-21 21:28:19,614 INFO L271 PluginConnector]: Initializing CDTParser...
[2021-02-21 21:28:19,616 INFO L275 PluginConnector]: CDTParser initialized
[2021-02-21 21:28:19,618 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007b.i
[2021-02-21 21:28:19,793 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2fdbb614/1319e92205e94660b56e354f80697ccd/FLAG117d27ce3
[2021-02-21 21:28:20,829 INFO L306 CDTParser]: Found 1 translation units.
[2021-02-21 21:28:20,830 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007b.i
[2021-02-21 21:28:20,840 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2fdbb614/1319e92205e94660b56e354f80697ccd/FLAG117d27ce3
[2021-02-21 21:28:20,870 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2fdbb614/1319e92205e94660b56e354f80697ccd
[2021-02-21 21:28:20,876 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-02-21 21:28:20,896 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2021-02-21 21:28:20,902 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-02-21 21:28:20,903 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-02-21 21:28:20,908 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2021-02-21 21:28:20,910 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:28:20" (1/1) ...
[2021-02-21 21:28:20,913 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@313732aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:28:20, skipping insertion in model container
[2021-02-21 21:28:20,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:28:20" (1/1) ...
[2021-02-21 21:28:20,925 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2021-02-21 21:28:20,952 INFO L178 MainTranslator]: Built tables and reachable declarations
[2021-02-21 21:28:21,337 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/gj2007b.i[895,908]
[2021-02-21 21:28:21,374 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-02-21 21:28:21,391 INFO L203 MainTranslator]: Completed pre-run
[2021-02-21 21:28:21,410 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/gj2007b.i[895,908]
[2021-02-21 21:28:21,416 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-02-21 21:28:21,442 INFO L208 MainTranslator]: Completed translation
[2021-02-21 21:28:21,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:28:21 WrapperNode
[2021-02-21 21:28:21,443 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-02-21 21:28:21,445 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-02-21 21:28:21,446 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2021-02-21 21:28:21,446 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2021-02-21 21:28:21,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:28:21" (1/1) ...
[2021-02-21 21:28:21,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:28:21" (1/1) ...
[2021-02-21 21:28:21,479 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:28:21" (1/1) ...
[2021-02-21 21:28:21,480 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:28:21" (1/1) ...
[2021-02-21 21:28:21,489 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:28:21" (1/1) ...
[2021-02-21 21:28:21,498 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:28:21" (1/1) ...
[2021-02-21 21:28:21,500 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:28:21" (1/1) ...
[2021-02-21 21:28:21,504 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-02-21 21:28:21,506 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-02-21 21:28:21,507 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2021-02-21 21:28:21,507 INFO L275 PluginConnector]: RCFGBuilder initialized
[2021-02-21 21:28:21,509 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:28:21" (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
[2021-02-21 21:28:21,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2021-02-21 21:28:21,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-02-21 21:28:21,664 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error
[2021-02-21 21:28:21,664 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2021-02-21 21:28:21,664 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2021-02-21 21:28:21,664 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2021-02-21 21:28:21,665 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2021-02-21 21:28:21,665 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail
[2021-02-21 21:28:21,665 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail
[2021-02-21 21:28:21,665 INFO L130 BoogieDeclarations]: Found specification of procedure __assert
[2021-02-21 21:28:21,666 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error
[2021-02-21 21:28:21,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-02-21 21:28:21,666 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2021-02-21 21:28:21,666 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2021-02-21 21:28:21,666 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2021-02-21 21:28:21,667 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2021-02-21 21:28:21,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2021-02-21 21:28:21,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2021-02-21 21:28:21,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-02-21 21:28:21,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2021-02-21 21:28:21,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2021-02-21 21:28:21,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2021-02-21 21:28:22,311 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-02-21 21:28:22,311 INFO L299 CfgBuilder]: Removed 1 assume(true) statements.
[2021-02-21 21:28:22,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:28:22 BoogieIcfgContainer
[2021-02-21 21:28:22,329 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-02-21 21:28:22,345 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-02-21 21:28:22,346 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2021-02-21 21:28:22,369 INFO L275 PluginConnector]: TraceAbstraction initialized
[2021-02-21 21:28:22,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 09:28:20" (1/3) ...
[2021-02-21 21:28:22,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1049a5de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:28:22, skipping insertion in model container
[2021-02-21 21:28:22,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:28:21" (2/3) ...
[2021-02-21 21:28:22,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1049a5de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:28:22, skipping insertion in model container
[2021-02-21 21:28:22,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:28:22" (3/3) ...
[2021-02-21 21:28:22,391 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007b.i
[2021-02-21 21:28:22,426 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION
[2021-02-21 21:28:22,458 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2021-02-21 21:28:22,563 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-02-21 21:28:22,639 INFO L376 AbstractCegarLoop]: Interprodecural is true
[2021-02-21 21:28:22,640 INFO L377 AbstractCegarLoop]: Hoare is true
[2021-02-21 21:28:22,640 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation
[2021-02-21 21:28:22,640 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2021-02-21 21:28:22,641 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2021-02-21 21:28:22,641 INFO L381 AbstractCegarLoop]: Difference is false
[2021-02-21 21:28:22,641 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2021-02-21 21:28:22,642 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2021-02-21 21:28:22,695 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states.
[2021-02-21 21:28:22,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2021-02-21 21:28:22,723 INFO L414 BasicCegarLoop]: Found error trace
[2021-02-21 21:28:22,725 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]
[2021-02-21 21:28:22,727 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-21 21:28:22,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-02-21 21:28:22,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1543512865, now seen corresponding path program 1 times
[2021-02-21 21:28:22,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-02-21 21:28:22,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910644168]
[2021-02-21 21:28:22,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-21 21:28:22,937 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-02-21 21:28:23,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-21 21:28:23,244 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 21:28:23,251 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-21 21:28:23,254 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 21:28:23,255 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-21 21:28:23,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-02-21 21:28:23,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-21 21:28:23,360 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 21:28:23,362 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-21 21:28:23,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-02-21 21:28:23,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910644168]
[2021-02-21 21:28:23,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-02-21 21:28:23,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-02-21 21:28:23,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302851055]
[2021-02-21 21:28:23,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states
[2021-02-21 21:28:23,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2021-02-21 21:28:23,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-02-21 21:28:23,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-02-21 21:28:23,446 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states.
[2021-02-21 21:28:23,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-02-21 21:28:23,649 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions.
[2021-02-21 21:28:23,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2021-02-21 21:28:23,653 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21
[2021-02-21 21:28:23,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-02-21 21:28:23,672 INFO L225 Difference]: With dead ends: 50
[2021-02-21 21:28:23,673 INFO L226 Difference]: Without dead ends: 31
[2021-02-21 21:28:23,681 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
[2021-02-21 21:28:23,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states.
[2021-02-21 21:28:23,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31.
[2021-02-21 21:28:23,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states.
[2021-02-21 21:28:23,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions.
[2021-02-21 21:28:23,804 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 21
[2021-02-21 21:28:23,805 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-02-21 21:28:23,805 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions.
[2021-02-21 21:28:23,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2021-02-21 21:28:23,806 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions.
[2021-02-21 21:28:23,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2021-02-21 21:28:23,808 INFO L414 BasicCegarLoop]: Found error trace
[2021-02-21 21:28:23,808 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]
[2021-02-21 21:28:23,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-02-21 21:28:23,809 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-21 21:28:23,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-02-21 21:28:23,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1557365680, now seen corresponding path program 1 times
[2021-02-21 21:28:23,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-02-21 21:28:23,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109301281]
[2021-02-21 21:28:23,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-21 21:28:23,816 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-02-21 21:28:23,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-21 21:28:24,044 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 21:28:24,046 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-21 21:28:24,050 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 21:28:24,052 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3
[2021-02-21 21:28:24,085 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size
[2021-02-21 21:28:24,088 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7
[2021-02-21 21:28:24,106 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 21:28:24,107 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4
[2021-02-21 21:28:24,119 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 21:28:24,121 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4
[2021-02-21 21:28:24,134 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 21:28:24,135 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-21 21:28:24,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-02-21 21:28:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-21 21:28:24,224 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 21:28:24,230 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-21 21:28:24,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-02-21 21:28:24,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109301281]
[2021-02-21 21:28:24,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-02-21 21:28:24,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2021-02-21 21:28:24,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705682482]
[2021-02-21 21:28:24,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states
[2021-02-21 21:28:24,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2021-02-21 21:28:24,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2021-02-21 21:28:24,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42
[2021-02-21 21:28:24,261 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 7 states.
[2021-02-21 21:28:24,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-02-21 21:28:24,776 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions.
[2021-02-21 21:28:24,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2021-02-21 21:28:24,778 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21
[2021-02-21 21:28:24,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-02-21 21:28:24,781 INFO L225 Difference]: With dead ends: 46
[2021-02-21 21:28:24,781 INFO L226 Difference]: Without dead ends: 38
[2021-02-21 21:28:24,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110
[2021-02-21 21:28:24,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states.
[2021-02-21 21:28:24,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36.
[2021-02-21 21:28:24,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states.
[2021-02-21 21:28:24,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions.
[2021-02-21 21:28:24,806 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 21
[2021-02-21 21:28:24,806 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-02-21 21:28:24,806 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions.
[2021-02-21 21:28:24,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states.
[2021-02-21 21:28:24,807 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions.
[2021-02-21 21:28:24,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2021-02-21 21:28:24,808 INFO L414 BasicCegarLoop]: Found error trace
[2021-02-21 21:28:24,809 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]
[2021-02-21 21:28:24,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-02-21 21:28:24,810 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-21 21:28:24,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-02-21 21:28:24,812 INFO L82 PathProgramCache]: Analyzing trace with hash -2003455287, now seen corresponding path program 1 times
[2021-02-21 21:28:24,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-02-21 21:28:24,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322581471]
[2021-02-21 21:28:24,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-21 21:28:27,115 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61
[2021-02-21 21:28:27,132 WARN L141 QuantifierPusher]: treesize reduction 6, result has 94.7 percent of original size
[2021-02-21 21:28:27,202 WARN L147 QuantifierPusher]: treesize reduction 6, result has 94.7 percent of original size 108
[2021-02-21 21:28:29,397 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61
[2021-02-21 21:28:29,407 WARN L141 QuantifierPusher]: treesize reduction 6, result has 94.3 percent of original size
[2021-02-21 21:28:29,418 WARN L147 QuantifierPusher]: treesize reduction 6, result has 94.3 percent of original size 100
[2021-02-21 21:28:29,420 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2021-02-21 21:28:29,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2021-02-21 21:28:29,474 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2021-02-21 21:28:29,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2021-02-21 21:28:29,528 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2021-02-21 21:28:29,576 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2021-02-21 21:28:29,576 INFO L523 BasicCegarLoop]: Counterexample might be feasible
[2021-02-21 21:28:29,577 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2021-02-21 21:28:29,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 09:28:29 BoogieIcfgContainer
[2021-02-21 21:28:29,607 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2021-02-21 21:28:29,610 INFO L168 Benchmark]: Toolchain (without parser) took 8728.15 ms. Allocated memory was 151.0 MB in the beginning and 197.1 MB in the end (delta: 46.1 MB). Free memory was 126.8 MB in the beginning and 120.5 MB in the end (delta: 6.3 MB). Peak memory consumption was 53.1 MB. Max. memory is 8.0 GB.
[2021-02-21 21:28:29,611 INFO L168 Benchmark]: CDTParser took 2.13 ms. Allocated memory is still 151.0 MB. Free memory was 123.4 MB in the beginning and 122.9 MB in the end (delta: 429.9 kB). There was no memory consumed. Max. memory is 8.0 GB.
[2021-02-21 21:28:29,612 INFO L168 Benchmark]: CACSL2BoogieTranslator took 542.00 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 116.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB.
[2021-02-21 21:28:29,614 INFO L168 Benchmark]: Boogie Preprocessor took 59.65 ms. Allocated memory is still 151.0 MB. Free memory was 116.1 MB in the beginning and 114.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
[2021-02-21 21:28:29,615 INFO L168 Benchmark]: RCFGBuilder took 822.73 ms. Allocated memory is still 151.0 MB. Free memory was 114.7 MB in the beginning and 132.8 MB in the end (delta: -18.1 MB). Peak memory consumption was 18.8 MB. Max. memory is 8.0 GB.
[2021-02-21 21:28:29,617 INFO L168 Benchmark]: TraceAbstraction took 7262.39 ms. Allocated memory was 151.0 MB in the beginning and 197.1 MB in the end (delta: 46.1 MB). Free memory was 132.3 MB in the beginning and 120.5 MB in the end (delta: 11.8 MB). Peak memory consumption was 58.5 MB. Max. memory is 8.0 GB.
[2021-02-21 21:28:29,621 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 2.13 ms. Allocated memory is still 151.0 MB. Free memory was 123.4 MB in the beginning and 122.9 MB in the end (delta: 429.9 kB). There was no memory consumed. Max. memory is 8.0 GB.
* CACSL2BoogieTranslator took 542.00 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 116.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB.
* Boogie Preprocessor took 59.65 ms. Allocated memory is still 151.0 MB. Free memory was 116.1 MB in the beginning and 114.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
* RCFGBuilder took 822.73 ms. Allocated memory is still 151.0 MB. Free memory was 114.7 MB in the beginning and 132.8 MB in the end (delta: -18.1 MB). Peak memory consumption was 18.8 MB. Max. memory is 8.0 GB.
* TraceAbstraction took 7262.39 ms. Allocated memory was 151.0 MB in the beginning and 197.1 MB in the end (delta: 46.1 MB). Free memory was 132.3 MB in the beginning and 120.5 MB in the end (delta: 11.8 MB). Peak memory consumption was 58.5 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 = 0;
[L26] int m = 0;
[L27] int n = __VERIFIER_nondet_int();
[L28] COND TRUE x < n
[L29] COND TRUE __VERIFIER_nondet_int()
[L30] m = x
[L32] x = x + 1
[L28] COND FALSE !(x < n)
[L34] CALL __VERIFIER_assert((m >= 0 || n <= 0))
[L18] COND TRUE !(cond)
[L19] reach_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 6 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.9s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 66 SDtfs, 69 SDslu, 57 SDs, 0 SdLazy, 93 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred 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: 0.1s AutomataMinimizationTime, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be incorrect!
Received shutdown request...