java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/array-crafted/xor3.i
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This is Ultimate 0.1.24-f4eb214f-m
[2019-10-13 19:52:47,378 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2019-10-13 19:52:47,381 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2019-10-13 19:52:47,400 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2019-10-13 19:52:47,400 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2019-10-13 19:52:47,402 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2019-10-13 19:52:47,404 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2019-10-13 19:52:47,409 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2019-10-13 19:52:47,414 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2019-10-13 19:52:47,415 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2019-10-13 19:52:47,416 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2019-10-13 19:52:47,419 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2019-10-13 19:52:47,419 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2019-10-13 19:52:47,420 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2019-10-13 19:52:47,423 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2019-10-13 19:52:47,424 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2019-10-13 19:52:47,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2019-10-13 19:52:47,426 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2019-10-13 19:52:47,432 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2019-10-13 19:52:47,434 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2019-10-13 19:52:47,438 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2019-10-13 19:52:47,441 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2019-10-13 19:52:47,442 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2019-10-13 19:52:47,443 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2019-10-13 19:52:47,447 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2019-10-13 19:52:47,448 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2019-10-13 19:52:47,448 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2019-10-13 19:52:47,449 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
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[2019-10-13 19:52:47,453 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
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[2019-10-13 19:52:47,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2019-10-13 19:52:47,460 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2019-10-13 19:52:47,474 INFO L113 SettingsManager]: Loading preferences was successful
[2019-10-13 19:52:47,475 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2019-10-13 19:52:47,476 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-10-13 19:52:47,476 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2019-10-13 19:52:47,476 INFO L138 SettingsManager]: * Use SBE=true
[2019-10-13 19:52:47,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-10-13 19:52:47,477 INFO L138 SettingsManager]: * sizeof long=4
[2019-10-13 19:52:47,477 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2019-10-13 19:52:47,477 INFO L138 SettingsManager]: * sizeof POINTER=4
[2019-10-13 19:52:47,478 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2019-10-13 19:52:47,478 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2019-10-13 19:52:47,478 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-10-13 19:52:47,478 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2019-10-13 19:52:47,478 INFO L138 SettingsManager]: * sizeof long double=12
[2019-10-13 19:52:47,479 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2019-10-13 19:52:47,479 INFO L138 SettingsManager]: * Use constant arrays=true
[2019-10-13 19:52:47,479 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2019-10-13 19:52:47,479 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-10-13 19:52:47,480 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2019-10-13 19:52:47,480 INFO L138 SettingsManager]: * To the following directory=./dump/
[2019-10-13 19:52:47,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2019-10-13 19:52:47,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-13 19:52:47,481 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-10-13 19:52:47,481 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2019-10-13 19:52:47,481 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-10-13 19:52:47,481 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2019-10-13 19:52:47,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-10-13 19:52:47,482 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-10-13 19:52:47,482 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES
[2019-10-13 19:52:47,792 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp
[2019-10-13 19:52:47,805 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-10-13 19:52:47,812 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-10-13 19:52:47,814 INFO L271 PluginConnector]: Initializing CDTParser...
[2019-10-13 19:52:47,814 INFO L275 PluginConnector]: CDTParser initialized
[2019-10-13 19:52:47,815 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/xor3.i
[2019-10-13 19:52:47,888 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab00c3323/60d8a7d2298a4349b1d3db1c29248dbb/FLAG9a44ffe5c
[2019-10-13 19:52:48,340 INFO L306 CDTParser]: Found 1 translation units.
[2019-10-13 19:52:48,341 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/xor3.i
[2019-10-13 19:52:48,348 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab00c3323/60d8a7d2298a4349b1d3db1c29248dbb/FLAG9a44ffe5c
[2019-10-13 19:52:48,753 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab00c3323/60d8a7d2298a4349b1d3db1c29248dbb
[2019-10-13 19:52:48,764 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-10-13 19:52:48,766 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2019-10-13 19:52:48,767 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-10-13 19:52:48,768 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-10-13 19:52:48,771 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2019-10-13 19:52:48,772 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:52:48" (1/1) ...
[2019-10-13 19:52:48,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76f7640f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:52:48, skipping insertion in model container
[2019-10-13 19:52:48,776 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:52:48" (1/1) ...
[2019-10-13 19:52:48,784 INFO L142 MainTranslator]: Starting translation in SV-COMP mode
[2019-10-13 19:52:48,807 INFO L173 MainTranslator]: Built tables and reachable declarations
[2019-10-13 19:52:49,027 INFO L206 PostProcessor]: Analyzing one entry point: main
[2019-10-13 19:52:49,037 INFO L188 MainTranslator]: Completed pre-run
[2019-10-13 19:52:49,057 INFO L206 PostProcessor]: Analyzing one entry point: main
[2019-10-13 19:52:49,163 INFO L192 MainTranslator]: Completed translation
[2019-10-13 19:52:49,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:52:49 WrapperNode
[2019-10-13 19:52:49,163 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-10-13 19:52:49,164 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-10-13 19:52:49,166 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2019-10-13 19:52:49,166 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2019-10-13 19:52:49,177 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:52:49" (1/1) ...
[2019-10-13 19:52:49,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:52:49" (1/1) ...
[2019-10-13 19:52:49,185 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:52:49" (1/1) ...
[2019-10-13 19:52:49,186 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:52:49" (1/1) ...
[2019-10-13 19:52:49,195 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:52:49" (1/1) ...
[2019-10-13 19:52:49,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:52:49" (1/1) ...
[2019-10-13 19:52:49,205 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:52:49" (1/1) ...
[2019-10-13 19:52:49,211 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-10-13 19:52:49,212 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-10-13 19:52:49,212 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2019-10-13 19:52:49,212 INFO L275 PluginConnector]: RCFGBuilder initialized
[2019-10-13 19:52:49,213 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:52:49" (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
[2019-10-13 19:52:49,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-10-13 19:52:49,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-10-13 19:52:49,266 INFO L138 BoogieDeclarations]: Found implementation of procedure xor
[2019-10-13 19:52:49,266 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2019-10-13 19:52:49,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-10-13 19:52:49,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-10-13 19:52:49,266 INFO L130 BoogieDeclarations]: Found specification of procedure xor
[2019-10-13 19:52:49,266 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2019-10-13 19:52:49,266 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2019-10-13 19:52:49,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2019-10-13 19:52:49,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2019-10-13 19:52:49,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2019-10-13 19:52:49,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-10-13 19:52:49,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-10-13 19:52:49,608 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-10-13 19:52:49,608 INFO L284 CfgBuilder]: Removed 3 assume(true) statements.
[2019-10-13 19:52:49,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:52:49 BoogieIcfgContainer
[2019-10-13 19:52:49,610 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-10-13 19:52:49,611 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-10-13 19:52:49,612 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2019-10-13 19:52:49,616 INFO L275 PluginConnector]: TraceAbstraction initialized
[2019-10-13 19:52:49,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:52:48" (1/3) ...
[2019-10-13 19:52:49,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52346f63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:52:49, skipping insertion in model container
[2019-10-13 19:52:49,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:52:49" (2/3) ...
[2019-10-13 19:52:49,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52346f63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:52:49, skipping insertion in model container
[2019-10-13 19:52:49,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:52:49" (3/3) ...
[2019-10-13 19:52:49,623 INFO L109 eAbstractionObserver]: Analyzing ICFG xor3.i
[2019-10-13 19:52:49,633 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-10-13 19:52:49,640 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-10-13 19:52:49,650 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-10-13 19:52:49,675 INFO L373 AbstractCegarLoop]: Interprodecural is true
[2019-10-13 19:52:49,675 INFO L374 AbstractCegarLoop]: Hoare is true
[2019-10-13 19:52:49,675 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-10-13 19:52:49,675 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-10-13 19:52:49,676 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-10-13 19:52:49,676 INFO L378 AbstractCegarLoop]: Difference is false
[2019-10-13 19:52:49,676 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-10-13 19:52:49,676 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-10-13 19:52:49,693 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states.
[2019-10-13 19:52:49,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33
[2019-10-13 19:52:49,700 INFO L372 BasicCegarLoop]: Found error trace
[2019-10-13 19:52:49,701 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 19:52:49,702 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 19:52:49,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 19:52:49,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1461178031, now seen corresponding path program 1 times
[2019-10-13 19:52:49,715 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN
[2019-10-13 19:52:49,715 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247565803]
[2019-10-13 19:52:49,716 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:52:49,716 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:52:49,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 19:52:49,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:52:49,860 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked.
[2019-10-13 19:52:49,861 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247565803]
[2019-10-13 19:52:49,862 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 19:52:49,862 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2019-10-13 19:52:49,862 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520112602]
[2019-10-13 19:52:49,867 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states
[2019-10-13 19:52:49,869 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN
[2019-10-13 19:52:49,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2019-10-13 19:52:49,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2019-10-13 19:52:49,888 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states.
[2019-10-13 19:52:49,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 19:52:49,915 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions.
[2019-10-13 19:52:49,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states.
[2019-10-13 19:52:49,917 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 32
[2019-10-13 19:52:49,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 19:52:49,927 INFO L225 Difference]: With dead ends: 54
[2019-10-13 19:52:49,928 INFO L226 Difference]: Without dead ends: 26
[2019-10-13 19:52:49,932 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2019-10-13 19:52:49,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states.
[2019-10-13 19:52:49,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26.
[2019-10-13 19:52:49,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states.
[2019-10-13 19:52:49,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions.
[2019-10-13 19:52:49,976 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32
[2019-10-13 19:52:49,976 INFO L84 Accepts]: Finished accepts. word is rejected.
[2019-10-13 19:52:49,977 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions.
[2019-10-13 19:52:49,977 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states.
[2019-10-13 19:52:49,977 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions.
[2019-10-13 19:52:49,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33
[2019-10-13 19:52:49,981 INFO L372 BasicCegarLoop]: Found error trace
[2019-10-13 19:52:49,982 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 19:52:49,982 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 19:52:49,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 19:52:49,983 INFO L82 PathProgramCache]: Analyzing trace with hash -595992629, now seen corresponding path program 1 times
[2019-10-13 19:52:49,983 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN
[2019-10-13 19:52:49,984 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031043216]
[2019-10-13 19:52:49,984 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:52:49,985 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:52:49,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 19:52:50,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:52:50,077 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked.
[2019-10-13 19:52:50,077 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031043216]
[2019-10-13 19:52:50,078 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 19:52:50,078 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-10-13 19:52:50,078 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486177555]
[2019-10-13 19:52:50,080 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-13 19:52:50,081 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN
[2019-10-13 19:52:50,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-13 19:52:50,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-10-13 19:52:50,082 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 3 states.
[2019-10-13 19:52:50,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 19:52:50,103 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions.
[2019-10-13 19:52:50,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2019-10-13 19:52:50,104 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32
[2019-10-13 19:52:50,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 19:52:50,105 INFO L225 Difference]: With dead ends: 46
[2019-10-13 19:52:50,106 INFO L226 Difference]: Without dead ends: 28
[2019-10-13 19:52:50,107 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-10-13 19:52:50,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states.
[2019-10-13 19:52:50,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27.
[2019-10-13 19:52:50,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states.
[2019-10-13 19:52:50,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions.
[2019-10-13 19:52:50,115 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32
[2019-10-13 19:52:50,115 INFO L84 Accepts]: Finished accepts. word is rejected.
[2019-10-13 19:52:50,115 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions.
[2019-10-13 19:52:50,115 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-13 19:52:50,116 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions.
[2019-10-13 19:52:50,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35
[2019-10-13 19:52:50,117 INFO L372 BasicCegarLoop]: Found error trace
[2019-10-13 19:52:50,117 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 19:52:50,117 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 19:52:50,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 19:52:50,118 INFO L82 PathProgramCache]: Analyzing trace with hash 169606189, now seen corresponding path program 1 times
[2019-10-13 19:52:50,118 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN
[2019-10-13 19:52:50,119 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160773661]
[2019-10-13 19:52:50,119 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:52:50,119 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:52:50,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 19:52:50,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:52:50,182 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked.
[2019-10-13 19:52:50,182 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160773661]
[2019-10-13 19:52:50,183 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97312136]
[2019-10-13 19:52:50,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 19:52:50,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:52:50,270 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core
[2019-10-13 19:52:50,278 INFO L279 TraceCheckSpWp]: Computing forward predicates...
[2019-10-13 19:52:50,308 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2019-10-13 19:52:50,308 INFO L321 TraceCheckSpWp]: Computing backward predicates...
[2019-10-13 19:52:50,349 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked.
[2019-10-13 19:52:50,350 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences.
[2019-10-13 19:52:50,350 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5
[2019-10-13 19:52:50,350 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921728202]
[2019-10-13 19:52:50,351 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-13 19:52:50,351 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN
[2019-10-13 19:52:50,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-13 19:52:50,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2019-10-13 19:52:50,352 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states.
[2019-10-13 19:52:50,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 19:52:50,389 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions.
[2019-10-13 19:52:50,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2019-10-13 19:52:50,389 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34
[2019-10-13 19:52:50,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 19:52:50,391 INFO L225 Difference]: With dead ends: 46
[2019-10-13 19:52:50,391 INFO L226 Difference]: Without dead ends: 29
[2019-10-13 19:52:50,392 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2019-10-13 19:52:50,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states.
[2019-10-13 19:52:50,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28.
[2019-10-13 19:52:50,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states.
[2019-10-13 19:52:50,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions.
[2019-10-13 19:52:50,405 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34
[2019-10-13 19:52:50,405 INFO L84 Accepts]: Finished accepts. word is rejected.
[2019-10-13 19:52:50,405 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions.
[2019-10-13 19:52:50,405 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-13 19:52:50,405 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions.
[2019-10-13 19:52:50,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41
[2019-10-13 19:52:50,409 INFO L372 BasicCegarLoop]: Found error trace
[2019-10-13 19:52:50,410 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 19:52:50,620 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 19:52:50,621 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 19:52:50,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 19:52:50,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1462689141, now seen corresponding path program 1 times
[2019-10-13 19:52:50,621 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN
[2019-10-13 19:52:50,622 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756364152]
[2019-10-13 19:52:50,622 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:52:50,622 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:52:50,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 19:52:50,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:52:50,738 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked.
[2019-10-13 19:52:50,739 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756364152]
[2019-10-13 19:52:50,739 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 19:52:50,739 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-10-13 19:52:50,740 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755832008]
[2019-10-13 19:52:50,740 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-13 19:52:50,740 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN
[2019-10-13 19:52:50,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-13 19:52:50,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-10-13 19:52:50,742 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states.
[2019-10-13 19:52:50,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 19:52:50,766 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions.
[2019-10-13 19:52:50,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2019-10-13 19:52:50,767 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40
[2019-10-13 19:52:50,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 19:52:50,768 INFO L225 Difference]: With dead ends: 43
[2019-10-13 19:52:50,768 INFO L226 Difference]: Without dead ends: 30
[2019-10-13 19:52:50,769 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-10-13 19:52:50,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states.
[2019-10-13 19:52:50,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29.
[2019-10-13 19:52:50,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states.
[2019-10-13 19:52:50,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions.
[2019-10-13 19:52:50,779 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40
[2019-10-13 19:52:50,788 INFO L84 Accepts]: Finished accepts. word is rejected.
[2019-10-13 19:52:50,788 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions.
[2019-10-13 19:52:50,789 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-13 19:52:50,789 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions.
[2019-10-13 19:52:50,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43
[2019-10-13 19:52:50,791 INFO L372 BasicCegarLoop]: Found error trace
[2019-10-13 19:52:50,791 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 19:52:50,792 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 19:52:50,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 19:52:50,792 INFO L82 PathProgramCache]: Analyzing trace with hash -233991671, now seen corresponding path program 1 times
[2019-10-13 19:52:50,793 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN
[2019-10-13 19:52:50,793 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479248148]
[2019-10-13 19:52:50,795 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:52:50,796 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:52:50,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 19:52:50,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:52:50,913 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked.
[2019-10-13 19:52:50,914 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479248148]
[2019-10-13 19:52:50,914 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775091089]
[2019-10-13 19:52:50,915 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 19:52:51,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:52:51,005 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core
[2019-10-13 19:52:51,010 INFO L279 TraceCheckSpWp]: Computing forward predicates...
[2019-10-13 19:52:51,031 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked.
[2019-10-13 19:52:51,031 INFO L321 TraceCheckSpWp]: Computing backward predicates...
[2019-10-13 19:52:51,103 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked.
[2019-10-13 19:52:51,104 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [126338218]
[2019-10-13 19:52:51,111 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 43
[2019-10-13 19:52:51,154 INFO L148 AbstractInterpreter]: Using domain IntervalDomain
[2019-10-13 19:52:51,154 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)
[2019-10-13 19:52:51,217 INFO L266 AbstractInterpreter]: Error location(s) were unreachable
[2019-10-13 19:52:51,219 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 15 root evaluator evaluations with a maximum evaluation depth of 0. Performed 15 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 30 variables.
[2019-10-13 19:52:51,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 19:52:51,223 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates
[2019-10-13 19:52:51,265 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes.
[2019-10-13 19:52:51,266 INFO L551 sIntCurrentIteration]: Unifying AI predicates
[2019-10-13 19:52:51,268 INFO L553 sIntCurrentIteration]: We unified 41 AI predicates to 41
[2019-10-13 19:52:51,268 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates
[2019-10-13 19:52:51,269 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences.
[2019-10-13 19:52:51,269 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4, 4, 4] total 7
[2019-10-13 19:52:51,270 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794892410]
[2019-10-13 19:52:51,270 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states
[2019-10-13 19:52:51,271 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN
[2019-10-13 19:52:51,271 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy
[2019-10-13 19:52:51,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2019-10-13 19:52:51,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2019-10-13 19:52:51,272 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 2 states.
[2019-10-13 19:52:51,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 19:52:51,274 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions.
[2019-10-13 19:52:51,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states.
[2019-10-13 19:52:51,275 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 42
[2019-10-13 19:52:51,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 19:52:51,275 INFO L225 Difference]: With dead ends: 29
[2019-10-13 19:52:51,275 INFO L226 Difference]: Without dead ends: 0
[2019-10-13 19:52:51,276 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2019-10-13 19:52:51,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2019-10-13 19:52:51,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2019-10-13 19:52:51,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states.
[2019-10-13 19:52:51,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2019-10-13 19:52:51,277 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 42
[2019-10-13 19:52:51,277 INFO L84 Accepts]: Finished accepts. word is rejected.
[2019-10-13 19:52:51,277 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2019-10-13 19:52:51,278 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states.
[2019-10-13 19:52:51,278 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2019-10-13 19:52:51,278 INFO L282 IsEmpty]: Finished isEmpty. No accepting run.
[2019-10-13 19:52:51,482 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 19:52:51,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.
[2019-10-13 19:52:51,534 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed.
[2019-10-13 19:52:51,534 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true
[2019-10-13 19:52:51,535 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed.
[2019-10-13 19:52:51,535 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed.
[2019-10-13 19:52:51,535 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true
[2019-10-13 19:52:51,535 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true
[2019-10-13 19:52:51,535 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed.
[2019-10-13 19:52:51,535 INFO L443 ceAbstractionStarter]: For program point xorFINAL(lines 7 16) no Hoare annotation was computed.
[2019-10-13 19:52:51,535 INFO L446 ceAbstractionStarter]: At program point xorENTRY(lines 7 16) the Hoare annotation is: true
[2019-10-13 19:52:51,536 INFO L443 ceAbstractionStarter]: For program point L12-2(lines 12 14) no Hoare annotation was computed.
[2019-10-13 19:52:51,536 INFO L446 ceAbstractionStarter]: At program point L12-3(lines 12 14) the Hoare annotation is: true
[2019-10-13 19:52:51,536 INFO L443 ceAbstractionStarter]: For program point L12-4(lines 12 14) no Hoare annotation was computed.
[2019-10-13 19:52:51,536 INFO L443 ceAbstractionStarter]: For program point xorEXIT(lines 7 16) no Hoare annotation was computed.
[2019-10-13 19:52:51,536 INFO L439 ceAbstractionStarter]: At program point L33(line 33) the Hoare annotation is: false
[2019-10-13 19:52:51,536 INFO L443 ceAbstractionStarter]: For program point L35-2(lines 35 37) no Hoare annotation was computed.
[2019-10-13 19:52:51,537 INFO L443 ceAbstractionStarter]: For program point L33-1(line 33) no Hoare annotation was computed.
[2019-10-13 19:52:51,537 INFO L439 ceAbstractionStarter]: At program point L35-3(lines 35 37) the Hoare annotation is: false
[2019-10-13 19:52:51,537 INFO L443 ceAbstractionStarter]: For program point L35-4(lines 35 37) no Hoare annotation was computed.
[2019-10-13 19:52:51,537 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 18 45) no Hoare annotation was computed.
[2019-10-13 19:52:51,537 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 18 45) no Hoare annotation was computed.
[2019-10-13 19:52:51,537 INFO L443 ceAbstractionStarter]: For program point L42(line 42) no Hoare annotation was computed.
[2019-10-13 19:52:51,537 INFO L443 ceAbstractionStarter]: For program point L30(line 30) no Hoare annotation was computed.
[2019-10-13 19:52:51,538 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 18 45) the Hoare annotation is: true
[2019-10-13 19:52:51,538 INFO L443 ceAbstractionStarter]: For program point L26-2(lines 26 28) no Hoare annotation was computed.
[2019-10-13 19:52:51,538 INFO L439 ceAbstractionStarter]: At program point L26-3(lines 26 28) the Hoare annotation is: false
[2019-10-13 19:52:51,538 INFO L439 ceAbstractionStarter]: At program point L26-4(lines 26 28) the Hoare annotation is: false
[2019-10-13 19:52:51,538 INFO L443 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 42) no Hoare annotation was computed.
[2019-10-13 19:52:51,538 INFO L443 ceAbstractionStarter]: For program point L41(lines 41 43) no Hoare annotation was computed.
[2019-10-13 19:52:51,539 INFO L439 ceAbstractionStarter]: At program point L39(line 39) the Hoare annotation is: false
[2019-10-13 19:52:51,539 INFO L443 ceAbstractionStarter]: For program point L41-2(lines 41 43) no Hoare annotation was computed.
[2019-10-13 19:52:51,539 INFO L443 ceAbstractionStarter]: For program point L39-1(line 39) no Hoare annotation was computed.
[2019-10-13 19:52:51,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:52:51 BoogieIcfgContainer
[2019-10-13 19:52:51,547 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2019-10-13 19:52:51,550 INFO L168 Benchmark]: Toolchain (without parser) took 2783.24 ms. Allocated memory was 145.2 MB in the beginning and 235.9 MB in the end (delta: 90.7 MB). Free memory was 101.8 MB in the beginning and 171.8 MB in the end (delta: -70.1 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB.
[2019-10-13 19:52:51,550 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 145.2 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
[2019-10-13 19:52:51,552 INFO L168 Benchmark]: CACSL2BoogieTranslator took 396.32 ms. Allocated memory was 145.2 MB in the beginning and 202.9 MB in the end (delta: 57.7 MB). Free memory was 101.6 MB in the beginning and 181.7 MB in the end (delta: -80.2 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB.
[2019-10-13 19:52:51,552 INFO L168 Benchmark]: Boogie Preprocessor took 47.70 ms. Allocated memory is still 202.9 MB. Free memory was 181.7 MB in the beginning and 179.3 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB.
[2019-10-13 19:52:51,553 INFO L168 Benchmark]: RCFGBuilder took 398.24 ms. Allocated memory is still 202.9 MB. Free memory was 179.3 MB in the beginning and 164.1 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.2 MB. Max. memory is 7.1 GB.
[2019-10-13 19:52:51,554 INFO L168 Benchmark]: TraceAbstraction took 1935.81 ms. Allocated memory was 202.9 MB in the beginning and 235.9 MB in the end (delta: 33.0 MB). Free memory was 163.5 MB in the beginning and 171.8 MB in the end (delta: -8.4 MB). Peak memory consumption was 24.7 MB. Max. memory is 7.1 GB.
[2019-10-13 19:52:51,558 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.21 ms. Allocated memory is still 145.2 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
* CACSL2BoogieTranslator took 396.32 ms. Allocated memory was 145.2 MB in the beginning and 202.9 MB in the end (delta: 57.7 MB). Free memory was 101.6 MB in the beginning and 181.7 MB in the end (delta: -80.2 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 47.70 ms. Allocated memory is still 202.9 MB. Free memory was 181.7 MB in the beginning and 179.3 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 398.24 ms. Allocated memory is still 202.9 MB. Free memory was 179.3 MB in the beginning and 164.1 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.2 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 1935.81 ms. Allocated memory was 202.9 MB in the beginning and 235.9 MB in the end (delta: 33.0 MB). Free memory was 163.5 MB in the beginning and 171.8 MB in the end (delta: -8.4 MB). Peak memory consumption was 24.7 MB. Max. memory is 7.1 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- PositiveResult [Line: 42]: call of __VERIFIER_error() unreachable
For all program executions holds that call of __VERIFIER_error() unreachable at this location
- AllSpecificationsHoldResult: All specifications hold
1 specifications checked. All of them hold
- InvariantResult [Line: 26]: Loop Invariant
Derived loop invariant: 0
- InvariantResult [Line: 12]: Loop Invariant
Derived loop invariant: 1
- InvariantResult [Line: 35]: Loop Invariant
Derived loop invariant: 0
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 4 procedures, 31 locations, 1 error locations. Result: SAFE, OverallTime: 1.8s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 124 SDtfs, 3 SDslu, 78 SDs, 0 SdLazy, 15 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 119 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred 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, 5 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 33 PreInvPairs, 33 NumberOfFragments, 11 HoareAnnotationTreeSize, 33 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 256 NumberOfCodeBlocks, 256 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 323 ConstructedInterpolants, 0 QuantifiedInterpolants, 12829 SizeOfPredicates, 2 NumberOfNonLiveVariables, 267 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 9 InterpolantComputations, 4 PerfectInterpolantSequences, 186/205 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: TIME[ms]: 113, ITERATIONS: 1, WAS_STRONG: 1, WEAKENING_RATIO: 0.9573170731707317, AVG_VARS_REMOVED_DURING_WEAKENING: 1.3902439024390243, AVG_WEAKENED_CONJUNCTS: 0.14634146341463414, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be correct!
Received shutdown request...