/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/loops/trex02-1.c
--------------------------------------------------------------------------------
This is Ultimate 0.2.1-dev-b7b32d2
[2021-02-22 02:21:20,913 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2021-02-22 02:21:20,917 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
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[2021-02-22 02:21:20,977 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
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[2021-02-22 02:21:21,012 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
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[2021-02-22 02:21:21,032 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
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[2021-02-22 02:21:21,073 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf
[2021-02-22 02:21:21,096 INFO L113 SettingsManager]: Loading preferences was successful
[2021-02-22 02:21:21,096 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2021-02-22 02:21:21,101 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-02-22 02:21:21,102 INFO L138 SettingsManager]: * sizeof long=4
[2021-02-22 02:21:21,102 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2021-02-22 02:21:21,102 INFO L138 SettingsManager]: * sizeof POINTER=4
[2021-02-22 02:21:21,102 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2021-02-22 02:21:21,103 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2021-02-22 02:21:21,103 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-02-22 02:21:21,103 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2021-02-22 02:21:21,104 INFO L138 SettingsManager]: * sizeof long double=12
[2021-02-22 02:21:21,105 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2021-02-22 02:21:21,105 INFO L138 SettingsManager]: * Use constant arrays=true
[2021-02-22 02:21:21,105 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2021-02-22 02:21:21,106 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-02-22 02:21:21,106 INFO L138 SettingsManager]: * Size of a code block=SingleStatement
[2021-02-22 02:21:21,106 INFO L138 SettingsManager]: * To the following directory=./dump/
[2021-02-22 02:21:21,106 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2021-02-22 02:21:21,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-02-22 02:21:21,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-02-22 02:21:21,107 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation
[2021-02-22 02:21:21,107 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-02-22 02:21:21,107 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX
[2021-02-22 02:21:21,108 INFO L138 SettingsManager]: * Use separate solver for trace checks=false
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2021-02-22 02:21:21,526 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2021-02-22 02:21:21,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-02-22 02:21:21,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-02-22 02:21:21,557 INFO L271 PluginConnector]: Initializing CDTParser...
[2021-02-22 02:21:21,557 INFO L275 PluginConnector]: CDTParser initialized
[2021-02-22 02:21:21,558 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex02-1.c
[2021-02-22 02:21:21,647 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe8434b14/895bb59f010c46a48d529b21b1722338/FLAG594a62610
[2021-02-22 02:21:22,252 INFO L306 CDTParser]: Found 1 translation units.
[2021-02-22 02:21:22,253 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/trex02-1.c
[2021-02-22 02:21:22,261 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe8434b14/895bb59f010c46a48d529b21b1722338/FLAG594a62610
[2021-02-22 02:21:22,624 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe8434b14/895bb59f010c46a48d529b21b1722338
[2021-02-22 02:21:22,627 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-02-22 02:21:22,641 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2021-02-22 02:21:22,648 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-02-22 02:21:22,648 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-02-22 02:21:22,652 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2021-02-22 02:21:22,653 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:21:22" (1/1) ...
[2021-02-22 02:21:22,654 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19eb6c70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:22, skipping insertion in model container
[2021-02-22 02:21:22,655 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:21:22" (1/1) ...
[2021-02-22 02:21:22,664 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2021-02-22 02:21:22,684 INFO L178 MainTranslator]: Built tables and reachable declarations
[2021-02-22 02:21:22,841 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/trex02-1.c[320,333]
[2021-02-22 02:21:22,855 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-02-22 02:21:22,866 INFO L203 MainTranslator]: Completed pre-run
[2021-02-22 02:21:22,881 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/trex02-1.c[320,333]
[2021-02-22 02:21:22,884 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-02-22 02:21:22,902 INFO L208 MainTranslator]: Completed translation
[2021-02-22 02:21:22,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:22 WrapperNode
[2021-02-22 02:21:22,903 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-02-22 02:21:22,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-02-22 02:21:22,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2021-02-22 02:21:22,905 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2021-02-22 02:21:22,920 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:22" (1/1) ...
[2021-02-22 02:21:22,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:22" (1/1) ...
[2021-02-22 02:21:22,929 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:22" (1/1) ...
[2021-02-22 02:21:22,929 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:22" (1/1) ...
[2021-02-22 02:21:22,935 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:22" (1/1) ...
[2021-02-22 02:21:22,940 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:22" (1/1) ...
[2021-02-22 02:21:22,941 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:22" (1/1) ...
[2021-02-22 02:21:22,944 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-02-22 02:21:22,945 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-02-22 02:21:22,945 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2021-02-22 02:21:22,945 INFO L275 PluginConnector]: RCFGBuilder initialized
[2021-02-22 02:21:22,946 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:22" (1/1) ...
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-02-22 02:21:23,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2021-02-22 02:21:23,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-02-22 02:21:23,071 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error
[2021-02-22 02:21:23,071 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2021-02-22 02:21:23,071 INFO L138 BoogieDeclarations]: Found implementation of procedure foo
[2021-02-22 02:21:23,071 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2021-02-22 02:21:23,072 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2021-02-22 02:21:23,072 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail
[2021-02-22 02:21:23,073 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error
[2021-02-22 02:21:23,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-02-22 02:21:23,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2021-02-22 02:21:23,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2021-02-22 02:21:23,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2021-02-22 02:21:23,075 INFO L130 BoogieDeclarations]: Found specification of procedure foo
[2021-02-22 02:21:23,075 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2021-02-22 02:21:23,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2021-02-22 02:21:23,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2021-02-22 02:21:23,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-02-22 02:21:23,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2021-02-22 02:21:23,080 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2021-02-22 02:21:23,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2021-02-22 02:21:23,497 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-02-22 02:21:23,498 INFO L299 CfgBuilder]: Removed 1 assume(true) statements.
[2021-02-22 02:21:23,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:21:23 BoogieIcfgContainer
[2021-02-22 02:21:23,500 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-02-22 02:21:23,520 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-02-22 02:21:23,521 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2021-02-22 02:21:23,524 INFO L275 PluginConnector]: TraceAbstraction initialized
[2021-02-22 02:21:23,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:21:22" (1/3) ...
[2021-02-22 02:21:23,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@694b5f92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:21:23, skipping insertion in model container
[2021-02-22 02:21:23,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:22" (2/3) ...
[2021-02-22 02:21:23,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@694b5f92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:21:23, skipping insertion in model container
[2021-02-22 02:21:23,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:21:23" (3/3) ...
[2021-02-22 02:21:23,527 INFO L111 eAbstractionObserver]: Analyzing ICFG trex02-1.c
[2021-02-22 02:21:23,534 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION
[2021-02-22 02:21:23,538 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2021-02-22 02:21:23,557 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-02-22 02:21:23,590 INFO L376 AbstractCegarLoop]: Interprodecural is true
[2021-02-22 02:21:23,591 INFO L377 AbstractCegarLoop]: Hoare is true
[2021-02-22 02:21:23,591 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation
[2021-02-22 02:21:23,591 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2021-02-22 02:21:23,591 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2021-02-22 02:21:23,591 INFO L381 AbstractCegarLoop]: Difference is false
[2021-02-22 02:21:23,591 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2021-02-22 02:21:23,592 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2021-02-22 02:21:23,606 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states.
[2021-02-22 02:21:23,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2021-02-22 02:21:23,615 INFO L414 BasicCegarLoop]: Found error trace
[2021-02-22 02:21:23,616 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]
[2021-02-22 02:21:23,616 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-22 02:21:23,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-02-22 02:21:23,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1993240371, now seen corresponding path program 1 times
[2021-02-22 02:21:23,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-02-22 02:21:23,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540457556]
[2021-02-22 02:21:23,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-22 02:21:23,710 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-02-22 02:21:23,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-22 02:21:23,830 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 02:21:23,832 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-22 02:21:23,833 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 02:21:23,833 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-22 02:21:23,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-02-22 02:21:23,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-22 02:21:23,903 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 02:21:23,904 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-22 02:21:23,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-02-22 02:21:23,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540457556]
[2021-02-22 02:21:23,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-02-22 02:21:23,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-02-22 02:21:23,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84171894]
[2021-02-22 02:21:23,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states
[2021-02-22 02:21:23,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2021-02-22 02:21:23,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-02-22 02:21:23,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-02-22 02:21:23,938 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states.
[2021-02-22 02:21:24,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-02-22 02:21:24,048 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions.
[2021-02-22 02:21:24,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2021-02-22 02:21:24,050 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21
[2021-02-22 02:21:24,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-02-22 02:21:24,061 INFO L225 Difference]: With dead ends: 50
[2021-02-22 02:21:24,062 INFO L226 Difference]: Without dead ends: 32
[2021-02-22 02:21:24,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-02-22 02:21:24,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states.
[2021-02-22 02:21:24,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32.
[2021-02-22 02:21:24,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states.
[2021-02-22 02:21:24,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions.
[2021-02-22 02:21:24,121 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 21
[2021-02-22 02:21:24,121 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-02-22 02:21:24,121 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions.
[2021-02-22 02:21:24,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2021-02-22 02:21:24,122 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions.
[2021-02-22 02:21:24,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2021-02-22 02:21:24,123 INFO L414 BasicCegarLoop]: Found error trace
[2021-02-22 02:21:24,123 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]
[2021-02-22 02:21:24,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-02-22 02:21:24,124 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-22 02:21:24,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-02-22 02:21:24,125 INFO L82 PathProgramCache]: Analyzing trace with hash -2006169665, now seen corresponding path program 1 times
[2021-02-22 02:21:24,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-02-22 02:21:24,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226234021]
[2021-02-22 02:21:24,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-22 02:21:24,129 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-02-22 02:21:24,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-22 02:21:24,203 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 02:21:24,204 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-22 02:21:24,205 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 02:21:24,206 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-22 02:21:24,208 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 02:21:24,208 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3
[2021-02-22 02:21:24,213 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 02:21:24,214 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4
[2021-02-22 02:21:24,220 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 02:21:24,221 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4
[2021-02-22 02:21:24,227 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 02:21:24,228 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-22 02:21:24,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-02-22 02:21:24,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-22 02:21:24,281 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 02:21:24,281 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-22 02:21:24,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-02-22 02:21:24,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226234021]
[2021-02-22 02:21:24,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-02-22 02:21:24,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2021-02-22 02:21:24,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912496953]
[2021-02-22 02:21:24,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states
[2021-02-22 02:21:24,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2021-02-22 02:21:24,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2021-02-22 02:21:24,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2021-02-22 02:21:24,288 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 6 states.
[2021-02-22 02:21:24,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-02-22 02:21:24,534 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions.
[2021-02-22 02:21:24,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2021-02-22 02:21:24,535 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21
[2021-02-22 02:21:24,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-02-22 02:21:24,536 INFO L225 Difference]: With dead ends: 32
[2021-02-22 02:21:24,536 INFO L226 Difference]: Without dead ends: 0
[2021-02-22 02:21:24,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72
[2021-02-22 02:21:24,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2021-02-22 02:21:24,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2021-02-22 02:21:24,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states.
[2021-02-22 02:21:24,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2021-02-22 02:21:24,540 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21
[2021-02-22 02:21:24,540 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-02-22 02:21:24,540 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2021-02-22 02:21:24,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states.
[2021-02-22 02:21:24,540 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2021-02-22 02:21:24,541 INFO L282 IsEmpty]: Finished isEmpty. No accepting run.
[2021-02-22 02:21:24,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-02-22 02:21:24,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.
[2021-02-22 02:21:24,879 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed.
[2021-02-22 02:21:24,879 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed.
[2021-02-22 02:21:24,879 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed.
[2021-02-22 02:21:24,880 INFO L192 CegarLoopUtils]: At program point L3-2(line 3) the Hoare annotation is: true
[2021-02-22 02:21:24,880 INFO L192 CegarLoopUtils]: At program point L3-3(line 3) the Hoare annotation is: true
[2021-02-22 02:21:24,880 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true
[2021-02-22 02:21:24,880 INFO L192 CegarLoopUtils]: At program point L3-4(line 3) the Hoare annotation is: true
[2021-02-22 02:21:24,880 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true
[2021-02-22 02:21:24,880 INFO L192 CegarLoopUtils]: At program point L3-5(line 3) the Hoare annotation is: true
[2021-02-22 02:21:24,881 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: (<= ~x~0 0)
[2021-02-22 02:21:24,881 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= ~x~0 |old(~x~0)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|))
[2021-02-22 02:21:24,881 INFO L192 CegarLoopUtils]: At program point L3(line 3) the Hoare annotation is: true
[2021-02-22 02:21:24,881 INFO L192 CegarLoopUtils]: At program point L3-1(line 3) the Hoare annotation is: true
[2021-02-22 02:21:24,882 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: (<= ~x~0 0)
[2021-02-22 02:21:24,882 INFO L192 CegarLoopUtils]: At program point L18-1(line 18) the Hoare annotation is: true
[2021-02-22 02:21:24,882 INFO L192 CegarLoopUtils]: At program point fooEXIT(lines 17 19) the Hoare annotation is: true
[2021-02-22 02:21:24,882 INFO L185 CegarLoopUtils]: At program point fooENTRY(lines 17 19) the Hoare annotation is: (= ~x~0 |old(~x~0)|)
[2021-02-22 02:21:24,882 INFO L192 CegarLoopUtils]: At program point fooFINAL(lines 17 19) the Hoare annotation is: true
[2021-02-22 02:21:24,882 INFO L185 CegarLoopUtils]: At program point L18(line 18) the Hoare annotation is: (= ~x~0 |old(~x~0)|)
[2021-02-22 02:21:24,883 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true
[2021-02-22 02:21:24,883 INFO L185 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (<= ~x~0 0)
[2021-02-22 02:21:24,883 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true
[2021-02-22 02:21:24,883 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true
[2021-02-22 02:21:24,883 INFO L192 CegarLoopUtils]: At program point L25(lines 25 26) the Hoare annotation is: true
[2021-02-22 02:21:24,884 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 21 29) the Hoare annotation is: true
[2021-02-22 02:21:24,884 INFO L192 CegarLoopUtils]: At program point L25-1(line 25) the Hoare annotation is: true
[2021-02-22 02:21:24,884 INFO L185 CegarLoopUtils]: At program point L23-2(lines 23 27) the Hoare annotation is: (or (<= ~x~0 0) (not (<= |old(~x~0)| 0)))
[2021-02-22 02:21:24,884 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 21 29) the Hoare annotation is: true
[2021-02-22 02:21:24,884 INFO L185 CegarLoopUtils]: At program point mainENTRY(lines 21 29) the Hoare annotation is: (or (= ~x~0 |old(~x~0)|) (not (<= |old(~x~0)| 0)))
[2021-02-22 02:21:24,885 INFO L192 CegarLoopUtils]: At program point L26(line 26) the Hoare annotation is: true
[2021-02-22 02:21:24,885 INFO L192 CegarLoopUtils]: At program point L26-1(lines 23 27) the Hoare annotation is: true
[2021-02-22 02:21:24,885 INFO L192 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: true
[2021-02-22 02:21:24,885 INFO L192 CegarLoopUtils]: At program point L24-1(line 24) the Hoare annotation is: true
[2021-02-22 02:21:24,885 INFO L185 CegarLoopUtils]: At program point L22(line 22) the Hoare annotation is: (or (= ~x~0 |old(~x~0)|) (not (<= |old(~x~0)| 0)))
[2021-02-22 02:21:24,885 INFO L192 CegarLoopUtils]: At program point L22-1(line 22) the Hoare annotation is: true
[2021-02-22 02:21:24,886 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true
[2021-02-22 02:21:24,886 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 5 10) the Hoare annotation is: true
[2021-02-22 02:21:24,886 INFO L185 CegarLoopUtils]: At program point L7(line 7) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (<= ~x~0 0)))
[2021-02-22 02:21:24,886 INFO L185 CegarLoopUtils]: At program point L6(lines 6 8) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0)) (not (<= ~x~0 0)))
[2021-02-22 02:21:24,886 INFO L185 CegarLoopUtils]: At program point L7-1(line 7) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (<= ~x~0 0)))
[2021-02-22 02:21:24,887 INFO L192 CegarLoopUtils]: At program point L6-2(lines 5 10) the Hoare annotation is: true
[2021-02-22 02:21:24,887 INFO L185 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (<= ~x~0 0)))
[2021-02-22 02:21:24,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 02:21:24 BoogieIcfgContainer
[2021-02-22 02:21:24,899 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2021-02-22 02:21:24,901 INFO L168 Benchmark]: Toolchain (without parser) took 2270.81 ms. Allocated memory is still 151.0 MB. Free memory was 127.4 MB in the beginning and 81.9 MB in the end (delta: 45.5 MB). Peak memory consumption was 46.6 MB. Max. memory is 8.0 GB.
[2021-02-22 02:21:24,902 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 125.2 MB in the end (delta: 118.7 kB). There was no memory consumed. Max. memory is 8.0 GB.
[2021-02-22 02:21:24,903 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.95 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 117.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB.
[2021-02-22 02:21:24,904 INFO L168 Benchmark]: Boogie Preprocessor took 39.52 ms. Allocated memory is still 151.0 MB. Free memory was 117.1 MB in the beginning and 115.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
[2021-02-22 02:21:24,905 INFO L168 Benchmark]: RCFGBuilder took 555.10 ms. Allocated memory is still 151.0 MB. Free memory was 115.6 MB in the beginning and 101.8 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB.
[2021-02-22 02:21:24,906 INFO L168 Benchmark]: TraceAbstraction took 1379.17 ms. Allocated memory is still 151.0 MB. Free memory was 134.0 MB in the beginning and 81.9 MB in the end (delta: 52.0 MB). Peak memory consumption was 52.3 MB. Max. memory is 8.0 GB.
[2021-02-22 02:21:24,910 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 125.2 MB in the end (delta: 118.7 kB). There was no memory consumed. Max. memory is 8.0 GB.
* CACSL2BoogieTranslator took 255.95 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 117.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB.
* Boogie Preprocessor took 39.52 ms. Allocated memory is still 151.0 MB. Free memory was 117.1 MB in the beginning and 115.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
* RCFGBuilder took 555.10 ms. Allocated memory is still 151.0 MB. Free memory was 115.6 MB in the beginning and 101.8 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB.
* TraceAbstraction took 1379.17 ms. Allocated memory is still 151.0 MB. Free memory was 134.0 MB in the beginning and 81.9 MB in the end (delta: 52.0 MB). Peak memory consumption was 52.3 MB. Max. memory is 8.0 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- PositiveResult [Line: 7]: call to reach_error is unreachable
For all program executions holds that call to reach_error is unreachable at this location
- AllSpecificationsHoldResult: All specifications hold
1 specifications checked. All of them hold
- InvariantResult [Line: 23]: Loop Invariant
Derived loop invariant: 1
- ProcedureContractResult [Line: 17]: Procedure Contract for foo
Derived contract for procedure foo: 1
- ProcedureContractResult [Line: 21]: Procedure Contract for main
Derived contract for procedure main: 1
- ProcedureContractResult [Line: 5]: Procedure Contract for __VERIFIER_assert
Derived contract for procedure __VERIFIER_assert: 1
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 6 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 69 SDtfs, 17 SDslu, 84 SDs, 0 SdLazy, 56 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 39 LocationsWithAnnotation, 51 PreInvPairs, 58 NumberOfFragments, 135 HoareAnnotationTreeSize, 51 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 39 FomulaSimplificationsInter, 301 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, 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 correct!
Received shutdown request...