/usr/bin/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/while_infinite_loop_4.c
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This is Ultimate 0.1.25-c90d42b
[2020-09-24 15:07:47,090 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-09-24 15:07:47,095 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-24 15:07:47,138 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-24 15:07:47,138 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-24 15:07:47,147 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-24 15:07:47,149 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-24 15:07:47,153 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-24 15:07:47,155 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-24 15:07:47,158 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-09-24 15:07:47,159 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-09-24 15:07:47,160 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-24 15:07:47,160 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-24 15:07:47,163 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-24 15:07:47,165 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-24 15:07:47,167 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-24 15:07:47,169 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-24 15:07:47,170 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-24 15:07:47,171 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-24 15:07:47,180 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-24 15:07:47,182 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-24 15:07:47,183 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-24 15:07:47,184 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-09-24 15:07:47,185 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-24 15:07:47,196 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-24 15:07:47,197 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-24 15:07:47,197 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-24 15:07:47,206 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-24 15:07:47,207 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-24 15:07:47,208 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-24 15:07:47,208 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-24 15:07:47,209 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-24 15:07:47,209 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-24 15:07:47,211 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-24 15:07:47,212 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-24 15:07:47,213 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-24 15:07:47,214 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-09-24 15:07:47,215 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-09-24 15:07:47,215 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2020-09-24 15:07:47,216 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2020-09-24 15:07:47,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-09-24 15:07:47,218 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-09-24 15:07:47,263 INFO L113 SettingsManager]: Loading preferences was successful
[2020-09-24 15:07:47,263 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-24 15:07:47,266 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-24 15:07:47,266 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-09-24 15:07:47,266 INFO L138 SettingsManager]: * Use SBE=true
[2020-09-24 15:07:47,267 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-24 15:07:47,267 INFO L138 SettingsManager]: * sizeof long=4
[2020-09-24 15:07:47,267 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-09-24 15:07:47,267 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-09-24 15:07:47,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-09-24 15:07:47,269 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-09-24 15:07:47,269 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-24 15:07:47,269 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-09-24 15:07:47,270 INFO L138 SettingsManager]: * sizeof long double=12
[2020-09-24 15:07:47,270 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-09-24 15:07:47,270 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-09-24 15:07:47,270 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-09-24 15:07:47,271 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-24 15:07:47,271 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-09-24 15:07:47,271 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-09-24 15:07:47,271 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-09-24 15:07:47,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 15:07:47,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-24 15:07:47,272 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-09-24 15:07:47,272 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-24 15:07:47,272 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-09-24 15:07:47,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-24 15:07:47,273 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-24 15:07:47,273 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-09-24 15:07:47,273 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false
[2020-09-24 15:07:47,752 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-24 15:07:47,778 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-24 15:07:47,783 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-24 15:07:47,785 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-09-24 15:07:47,785 INFO L275 PluginConnector]: CDTParser initialized
[2020-09-24 15:07:47,786 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/while_infinite_loop_4.c
[2020-09-24 15:07:47,880 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d9c8d1097/84bd832608be46e9a7acaf3da0f75a3f/FLAG5005e1c55
[2020-09-24 15:07:48,441 INFO L306 CDTParser]: Found 1 translation units.
[2020-09-24 15:07:48,442 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/while_infinite_loop_4.c
[2020-09-24 15:07:48,455 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d9c8d1097/84bd832608be46e9a7acaf3da0f75a3f/FLAG5005e1c55
[2020-09-24 15:07:48,850 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d9c8d1097/84bd832608be46e9a7acaf3da0f75a3f
[2020-09-24 15:07:48,865 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-24 15:07:48,870 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-24 15:07:48,872 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-24 15:07:48,872 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-24 15:07:48,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-24 15:07:48,877 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:07:48" (1/1) ...
[2020-09-24 15:07:48,882 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9dbf34c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:48, skipping insertion in model container
[2020-09-24 15:07:48,882 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:07:48" (1/1) ...
[2020-09-24 15:07:48,891 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-09-24 15:07:48,916 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-09-24 15:07:49,148 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-24 15:07:49,154 INFO L203 MainTranslator]: Completed pre-run
[2020-09-24 15:07:49,170 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-24 15:07:49,185 INFO L208 MainTranslator]: Completed translation
[2020-09-24 15:07:49,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:49 WrapperNode
[2020-09-24 15:07:49,186 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-24 15:07:49,187 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-24 15:07:49,187 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-24 15:07:49,187 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-09-24 15:07:49,201 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:49" (1/1) ...
[2020-09-24 15:07:49,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:49" (1/1) ...
[2020-09-24 15:07:49,284 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:49" (1/1) ...
[2020-09-24 15:07:49,284 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:49" (1/1) ...
[2020-09-24 15:07:49,288 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:49" (1/1) ...
[2020-09-24 15:07:49,294 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:49" (1/1) ...
[2020-09-24 15:07:49,295 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:49" (1/1) ...
[2020-09-24 15:07:49,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-24 15:07:49,297 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-24 15:07:49,297 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-09-24 15:07:49,297 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-09-24 15:07:49,298 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:49" (1/1) ...
No working directory specified, using /storage/repos/ultimate-2/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
[2020-09-24 15:07:49,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-24 15:07:49,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-24 15:07:49,373 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-09-24 15:07:49,373 INFO L138 BoogieDeclarations]: Found implementation of procedure eval
[2020-09-24 15:07:49,373 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-09-24 15:07:49,374 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-24 15:07:49,374 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-09-24 15:07:49,374 INFO L130 BoogieDeclarations]: Found specification of procedure eval
[2020-09-24 15:07:49,374 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-09-24 15:07:49,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-24 15:07:49,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-24 15:07:49,553 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-24 15:07:49,554 INFO L295 CfgBuilder]: Removed 2 assume(true) statements.
[2020-09-24 15:07:49,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:07:49 BoogieIcfgContainer
[2020-09-24 15:07:49,559 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-24 15:07:49,560 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-24 15:07:49,560 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-09-24 15:07:49,564 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-09-24 15:07:49,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 03:07:48" (1/3) ...
[2020-09-24 15:07:49,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2013459c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:07:49, skipping insertion in model container
[2020-09-24 15:07:49,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:49" (2/3) ...
[2020-09-24 15:07:49,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2013459c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:07:49, skipping insertion in model container
[2020-09-24 15:07:49,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:07:49" (3/3) ...
[2020-09-24 15:07:49,568 INFO L109 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_4.c
[2020-09-24 15:07:49,580 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-24 15:07:49,590 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-24 15:07:49,614 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-24 15:07:49,646 INFO L375 AbstractCegarLoop]: Interprodecural is true
[2020-09-24 15:07:49,646 INFO L376 AbstractCegarLoop]: Hoare is true
[2020-09-24 15:07:49,646 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-24 15:07:49,647 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-24 15:07:49,647 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-24 15:07:49,647 INFO L380 AbstractCegarLoop]: Difference is false
[2020-09-24 15:07:49,647 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-24 15:07:49,647 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-24 15:07:49,670 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states.
[2020-09-24 15:07:49,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2020-09-24 15:07:49,676 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 15:07:49,677 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 15:07:49,678 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:07:49,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:07:49,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1063393928, now seen corresponding path program 1 times
[2020-09-24 15:07:49,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:07:49,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366044417]
[2020-09-24 15:07:49,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:07:49,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:07:49,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:07:49,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:07:49,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 15:07:49,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366044417]
[2020-09-24 15:07:49,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 15:07:49,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-09-24 15:07:49,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662205211]
[2020-09-24 15:07:49,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-09-24 15:07:49,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:07:49,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-09-24 15:07:49,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-09-24 15:07:49,888 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states.
[2020-09-24 15:07:49,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 15:07:49,956 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions.
[2020-09-24 15:07:49,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-09-24 15:07:49,959 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10
[2020-09-24 15:07:49,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 15:07:49,973 INFO L225 Difference]: With dead ends: 39
[2020-09-24 15:07:49,973 INFO L226 Difference]: Without dead ends: 20
[2020-09-24 15:07:49,978 INFO L675 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
[2020-09-24 15:07:50,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states.
[2020-09-24 15:07:50,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18.
[2020-09-24 15:07:50,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states.
[2020-09-24 15:07:50,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions.
[2020-09-24 15:07:50,049 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 10
[2020-09-24 15:07:50,050 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 15:07:50,050 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions.
[2020-09-24 15:07:50,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-09-24 15:07:50,050 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions.
[2020-09-24 15:07:50,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2020-09-24 15:07:50,051 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 15:07:50,052 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 15:07:50,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-24 15:07:50,053 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:07:50,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:07:50,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1652124924, now seen corresponding path program 1 times
[2020-09-24 15:07:50,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:07:50,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155828863]
[2020-09-24 15:07:50,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:07:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-09-24 15:07:50,083 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-09-24 15:07:50,083 INFO L520 BasicCegarLoop]: Counterexample might be feasible
[2020-09-24 15:07:50,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-24 15:07:50,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 03:07:50 BoogieIcfgContainer
[2020-09-24 15:07:50,108 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-09-24 15:07:50,114 INFO L168 Benchmark]: Toolchain (without parser) took 1243.14 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 101.9 MB in the beginning and 144.9 MB in the end (delta: -43.1 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB.
[2020-09-24 15:07:50,115 INFO L168 Benchmark]: CDTParser took 0.60 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB.
[2020-09-24 15:07:50,116 INFO L168 Benchmark]: CACSL2BoogieTranslator took 314.84 ms. Allocated memory is still 138.9 MB. Free memory was 101.2 MB in the beginning and 92.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB.
[2020-09-24 15:07:50,118 INFO L168 Benchmark]: Boogie Preprocessor took 109.70 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 92.0 MB in the beginning and 180.9 MB in the end (delta: -88.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB.
[2020-09-24 15:07:50,119 INFO L168 Benchmark]: RCFGBuilder took 262.05 ms. Allocated memory is still 201.9 MB. Free memory was 180.2 MB in the beginning and 169.2 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB.
[2020-09-24 15:07:50,120 INFO L168 Benchmark]: TraceAbstraction took 548.36 ms. Allocated memory is still 201.9 MB. Free memory was 168.5 MB in the beginning and 144.9 MB in the end (delta: 23.6 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB.
[2020-09-24 15:07:50,126 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.60 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB.
* CACSL2BoogieTranslator took 314.84 ms. Allocated memory is still 138.9 MB. Free memory was 101.2 MB in the beginning and 92.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 109.70 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 92.0 MB in the beginning and 180.9 MB in the end (delta: -88.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 262.05 ms. Allocated memory is still 201.9 MB. Free memory was 180.2 MB in the beginning and 169.2 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 548.36 ms. Allocated memory is still 201.9 MB. Free memory was 168.5 MB in the beginning and 144.9 MB in the end (delta: 23.6 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable
a call of __VERIFIER_error() is reachable
We found a FailurePath:
[L10] int x=0;
[L24] COND TRUE 1
[L26] CALL eval()
[L14] COND TRUE 1
[L15] x=1
[L26] RET eval()
[L27] CALL __VERIFIER_assert(x==0)
[L4] COND TRUE !(cond)
[L5] __VERIFIER_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 19 SDtfs, 7 SDslu, 5 SDs, 0 SdLazy, 4 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 25 NumberOfCodeBlocks, 25 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 99 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be incorrect!
Received shutdown request...