/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 --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1072b.c


--------------------------------------------------------------------------------


This is Ultimate 0.1.25-eb0fd7c
[2020-09-21 10:17:00,607 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-09-21 10:17:00,611 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-21 10:17:00,641 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-21 10:17:00,642 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-21 10:17:00,643 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-21 10:17:00,652 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2020-09-21 10:17:00,663 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
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[2020-09-21 10:17:00,672 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-21 10:17:00,674 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-21 10:17:00,675 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-21 10:17:00,678 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-21 10:17:00,686 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-21 10:17:00,689 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-21 10:17:00,691 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-21 10:17:00,693 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-09-21 10:17:00,694 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-21 10:17:00,708 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-21 10:17:00,708 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-21 10:17:00,708 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
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[2020-09-21 10:17:00,722 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-09-21 10:17:00,725 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-09-21 10:17:00,726 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
[2020-09-21 10:17:00,771 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-09-21 10:17:00,771 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-21 10:17:00,774 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-21 10:17:00,774 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-09-21 10:17:00,775 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-09-21 10:17:00,775 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-21 10:17:00,775 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-09-21 10:17:00,776 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-09-21 10:17:00,776 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-09-21 10:17:00,776 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-09-21 10:17:00,777 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-09-21 10:17:00,778 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-21 10:17:00,778 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-09-21 10:17:00,778 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-09-21 10:17:00,778 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-09-21 10:17:00,779 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-09-21 10:17:00,779 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-09-21 10:17:00,779 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-21 10:17:00,779 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-09-21 10:17:00,780 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-09-21 10:17:00,780 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-09-21 10:17:00,780 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-21 10:17:00,780 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-21 10:17:00,780 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-09-21 10:17:00,781 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-21 10:17:00,781 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-09-21 10:17:00,781 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-21 10:17:00,781 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-21 10:17:00,781 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-09-21 10:17:00,782 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.traceabstraction: Use minimal unsat core enumeration -> false
[2020-09-21 10:17:01,269 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-21 10:17:01,295 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-21 10:17:01,300 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-21 10:17:01,303 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-09-21 10:17:01,304 INFO  L275        PluginConnector]: CDTParser initialized
[2020-09-21 10:17:01,305 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1072b.c
[2020-09-21 10:17:01,402 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ebf74b1ac/a7b0961a588449a7b72123bb255a7607/FLAG90e472735
[2020-09-21 10:17:01,973 INFO  L306              CDTParser]: Found 1 translation units.
[2020-09-21 10:17:01,974 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1072b.c
[2020-09-21 10:17:01,983 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ebf74b1ac/a7b0961a588449a7b72123bb255a7607/FLAG90e472735
[2020-09-21 10:17:02,310 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ebf74b1ac/a7b0961a588449a7b72123bb255a7607
[2020-09-21 10:17:02,323 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-21 10:17:02,329 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-21 10:17:02,332 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-21 10:17:02,333 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-21 10:17:02,337 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-21 10:17:02,338 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:17:02" (1/1) ...
[2020-09-21 10:17:02,344 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@718a405b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:02, skipping insertion in model container
[2020-09-21 10:17:02,344 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:17:02" (1/1) ...
[2020-09-21 10:17:02,354 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-09-21 10:17:02,387 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-09-21 10:17:02,617 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-21 10:17:02,621 INFO  L203         MainTranslator]: Completed pre-run
[2020-09-21 10:17:02,655 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-21 10:17:02,778 INFO  L208         MainTranslator]: Completed translation
[2020-09-21 10:17:02,779 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:02 WrapperNode
[2020-09-21 10:17:02,779 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-21 10:17:02,780 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-21 10:17:02,780 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-21 10:17:02,781 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-09-21 10:17:02,795 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:02" (1/1) ...
[2020-09-21 10:17:02,796 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:02" (1/1) ...
[2020-09-21 10:17:02,812 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:02" (1/1) ...
[2020-09-21 10:17:02,813 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:02" (1/1) ...
[2020-09-21 10:17:02,837 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:02" (1/1) ...
[2020-09-21 10:17:02,844 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:02" (1/1) ...
[2020-09-21 10:17:02,846 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:02" (1/1) ...
[2020-09-21 10:17:02,849 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-21 10:17:02,850 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-21 10:17:02,850 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-09-21 10:17:02,850 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-09-21 10:17:02,851 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:02" (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
[2020-09-21 10:17:02,925 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-21 10:17:02,925 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-21 10:17:02,925 INFO  L138     BoogieDeclarations]: Found implementation of procedure trunc_float
[2020-09-21 10:17:02,926 INFO  L138     BoogieDeclarations]: Found implementation of procedure isinf_float
[2020-09-21 10:17:02,926 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-09-21 10:17:02,926 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-21 10:17:02,927 INFO  L130     BoogieDeclarations]: Found specification of procedure trunc_float
[2020-09-21 10:17:02,927 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-09-21 10:17:02,927 INFO  L130     BoogieDeclarations]: Found specification of procedure write~real
[2020-09-21 10:17:02,928 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2020-09-21 10:17:02,928 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-09-21 10:17:02,929 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2020-09-21 10:17:02,929 INFO  L130     BoogieDeclarations]: Found specification of procedure read~real
[2020-09-21 10:17:02,930 INFO  L130     BoogieDeclarations]: Found specification of procedure isinf_float
[2020-09-21 10:17:02,930 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-09-21 10:17:02,931 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-21 10:17:02,931 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-21 10:17:03,298 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-21 10:17:03,299 INFO  L295             CfgBuilder]: Removed 8 assume(true) statements.
[2020-09-21 10:17:03,304 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:17:03 BoogieIcfgContainer
[2020-09-21 10:17:03,304 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-21 10:17:03,305 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-21 10:17:03,306 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-09-21 10:17:03,310 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-09-21 10:17:03,310 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:17:02" (1/3) ...
[2020-09-21 10:17:03,311 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@759d8bba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:17:03, skipping insertion in model container
[2020-09-21 10:17:03,312 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:02" (2/3) ...
[2020-09-21 10:17:03,312 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@759d8bba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:17:03, skipping insertion in model container
[2020-09-21 10:17:03,312 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:17:03" (3/3) ...
[2020-09-21 10:17:03,315 INFO  L109   eAbstractionObserver]: Analyzing ICFG float_req_bl_1072b.c
[2020-09-21 10:17:03,329 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-21 10:17:03,340 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-21 10:17:03,365 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-21 10:17:03,400 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-09-21 10:17:03,400 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-09-21 10:17:03,400 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-21 10:17:03,401 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-21 10:17:03,401 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-21 10:17:03,401 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-09-21 10:17:03,401 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-21 10:17:03,401 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-21 10:17:03,428 INFO  L276                IsEmpty]: Start isEmpty. Operand 37 states.
[2020-09-21 10:17:03,437 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2020-09-21 10:17:03,437 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-21 10:17:03,438 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-21 10:17:03,439 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-21 10:17:03,445 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-21 10:17:03,446 INFO  L82        PathProgramCache]: Analyzing trace with hash -456969478, now seen corresponding path program 1 times
[2020-09-21 10:17:03,455 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-21 10:17:03,455 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291179832]
[2020-09-21 10:17:03,456 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-21 10:17:03,582 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-21 10:17:03,665 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-21 10:17:03,668 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-21 10:17:03,699 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2020-09-21 10:17:03,703 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-21 10:17:03,709 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15
[2020-09-21 10:17:03,712 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-21 10:17:03,727 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-21 10:17:03,728 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291179832]
[2020-09-21 10:17:03,730 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-21 10:17:03,730 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-09-21 10:17:03,732 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053271134]
[2020-09-21 10:17:03,738 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-09-21 10:17:03,739 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-21 10:17:03,755 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-09-21 10:17:03,756 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-21 10:17:03,758 INFO  L87              Difference]: Start difference. First operand 37 states. Second operand 4 states.
[2020-09-21 10:17:03,976 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-21 10:17:03,976 INFO  L93              Difference]: Finished difference Result 66 states and 89 transitions.
[2020-09-21 10:17:03,978 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-09-21 10:17:03,979 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 24
[2020-09-21 10:17:03,980 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-21 10:17:03,992 INFO  L225             Difference]: With dead ends: 66
[2020-09-21 10:17:03,993 INFO  L226             Difference]: Without dead ends: 33
[2020-09-21 10:17:03,997 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-09-21 10:17:04,021 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 33 states.
[2020-09-21 10:17:04,050 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33.
[2020-09-21 10:17:04,052 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 33 states.
[2020-09-21 10:17:04,053 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions.
[2020-09-21 10:17:04,056 INFO  L78                 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 24
[2020-09-21 10:17:04,056 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-21 10:17:04,056 INFO  L479      AbstractCegarLoop]: Abstraction has 33 states and 35 transitions.
[2020-09-21 10:17:04,056 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-09-21 10:17:04,057 INFO  L276                IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions.
[2020-09-21 10:17:04,058 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2020-09-21 10:17:04,058 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-21 10:17:04,058 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-21 10:17:04,059 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-21 10:17:04,059 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-21 10:17:04,060 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-21 10:17:04,060 INFO  L82        PathProgramCache]: Analyzing trace with hash 1810155496, now seen corresponding path program 1 times
[2020-09-21 10:17:04,060 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-21 10:17:04,061 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656203810]
[2020-09-21 10:17:04,061 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-21 10:17:04,161 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-09-21 10:17:04,167 INFO  L174   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-09-21 10:17:04,168 INFO  L520         BasicCegarLoop]: Counterexample might be feasible
[2020-09-21 10:17:04,182 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-21 10:17:04,202 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:17:04 BoogieIcfgContainer
[2020-09-21 10:17:04,202 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-09-21 10:17:04,206 INFO  L168              Benchmark]: Toolchain (without parser) took 1879.74 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 101.2 MB in the beginning and 114.8 MB in the end (delta: -13.6 MB). Peak memory consumption was 49.8 MB. Max. memory is 7.1 GB.
[2020-09-21 10:17:04,207 INFO  L168              Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB.
[2020-09-21 10:17:04,208 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 447.66 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 100.6 MB in the beginning and 179.5 MB in the end (delta: -78.9 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB.
[2020-09-21 10:17:04,209 INFO  L168              Benchmark]: Boogie Preprocessor took 68.94 ms. Allocated memory is still 201.3 MB. Free memory was 179.5 MB in the beginning and 177.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB.
[2020-09-21 10:17:04,210 INFO  L168              Benchmark]: RCFGBuilder took 454.49 ms. Allocated memory is still 201.3 MB. Free memory was 177.1 MB in the beginning and 157.8 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB.
[2020-09-21 10:17:04,211 INFO  L168              Benchmark]: TraceAbstraction took 897.03 ms. Allocated memory is still 201.3 MB. Free memory was 157.1 MB in the beginning and 114.8 MB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB.
[2020-09-21 10:17:04,215 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.18 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 447.66 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 100.6 MB in the beginning and 179.5 MB in the end (delta: -78.9 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 68.94 ms. Allocated memory is still 201.3 MB. Free memory was 179.5 MB in the beginning and 177.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 454.49 ms. Allocated memory is still 201.3 MB. Free memory was 177.1 MB in the beginning and 157.8 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 897.03 ms. Allocated memory is still 201.3 MB. Free memory was 157.1 MB in the beginning and 114.8 MB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - UnprovableResult [Line: 66]: Unable to prove that call of __VERIFIER_error() unreachable
    Unable to prove that call of __VERIFIER_error() unreachable
 Reason: overapproximation of someBinaryArithmeticFLOAToperation at line 37, overapproximation of bitwiseAnd at line 50. 
Possible FailurePath: 
[L61]              float x = -1.0f / 0.0f;
[L62]  CALL, EXPR  trunc_float(x)
[L12]              __int32_t signbit, w, exponent_less_127;
[L14]              ieee_float_shape_type gf_u;
[L15]              gf_u.value = (x)
[L16]  EXPR        gf_u.word
[L16]              (w) = gf_u.word
[L18]              signbit = w & 0x80000000
[L19]              exponent_less_127 = ((w & 0x7f800000) >> 23) - 127
[L20]  COND FALSE  !(exponent_less_127 < 23)
[L36]  COND TRUE   exponent_less_127 == 255
[L37]              return x + x;
[L62]  RET, EXPR   trunc_float(x)
[L62]              float res = trunc_float(x);
[L65]  CALL, EXPR  isinf_float(res)
[L44]              __int32_t ix;
[L46]              ieee_float_shape_type gf_u;
[L47]              gf_u.value = (x)
[L48]  EXPR        gf_u.word
[L48]              (ix) = gf_u.word
[L50]              ix &= 0x7fffffff
[L51]              return ((ix) == 0x7f800000L);
[L65]  RET, EXPR   isinf_float(res)
[L65]  COND TRUE   !isinf_float(res)
[L66]              __VERIFIER_error()

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 32 SDtfs, 27 SDslu, 5 SDs, 0 SdLazy, 39 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 50 NumberOfCodeBlocks, 50 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 23 ConstructedInterpolants, 0 QuantifiedInterpolants, 1288 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 could not prove your program: unable to determine feasibility of some traces
Received shutdown request...