/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-benchs/float_int_inv_square.c
--------------------------------------------------------------------------------
This is Ultimate 0.1.25-d623d84
[2020-07-20 21:07:07,811 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-07-20 21:07:07,813 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-20 21:07:07,824 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-20 21:07:07,824 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-20 21:07:07,825 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-20 21:07:07,826 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-20 21:07:07,828 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-07-20 21:07:07,830 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-07-20 21:07:07,831 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-07-20 21:07:07,832 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-07-20 21:07:07,833 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-20 21:07:07,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-20 21:07:07,834 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-20 21:07:07,836 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-20 21:07:07,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-20 21:07:07,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-20 21:07:07,839 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-20 21:07:07,840 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-20 21:07:07,843 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-20 21:07:07,844 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-20 21:07:07,845 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-20 21:07:07,847 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-07-20 21:07:07,847 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-20 21:07:07,851 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-20 21:07:07,851 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-20 21:07:07,851 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-20 21:07:07,852 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-20 21:07:07,853 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-07-20 21:07:07,854 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-07-20 21:07:07,854 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-07-20 21:07:07,855 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-07-20 21:07:07,856 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-07-20 21:07:07,857 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2020-07-20 21:07:07,858 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-20 21:07:07,859 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2020-07-20 21:07:07,859 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-07-20 21:07:07,860 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-07-20 21:07:07,860 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2020-07-20 21:07:07,861 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2020-07-20 21:07:07,862 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-07-20 21:07:07,863 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
[2020-07-20 21:07:07,879 INFO L113 SettingsManager]: Loading preferences was successful
[2020-07-20 21:07:07,880 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-20 21:07:07,881 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-20 21:07:07,881 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-07-20 21:07:07,881 INFO L138 SettingsManager]: * Use SBE=true
[2020-07-20 21:07:07,882 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-20 21:07:07,882 INFO L138 SettingsManager]: * sizeof long=4
[2020-07-20 21:07:07,882 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-07-20 21:07:07,882 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-07-20 21:07:07,883 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-07-20 21:07:07,883 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-07-20 21:07:07,883 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-20 21:07:07,883 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-07-20 21:07:07,883 INFO L138 SettingsManager]: * sizeof long double=12
[2020-07-20 21:07:07,884 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-07-20 21:07:07,884 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-07-20 21:07:07,884 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-07-20 21:07:07,884 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-20 21:07:07,884 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-07-20 21:07:07,885 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-07-20 21:07:07,887 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-07-20 21:07:07,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 21:07:07,888 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-20 21:07:07,888 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-07-20 21:07:07,888 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-20 21:07:07,888 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-07-20 21:07:07,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:07:07,889 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-20 21:07:07,889 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-07-20 21:07:07,889 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 -> FPandBPonlyIfFpWasNotPerfect
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4
[2020-07-20 21:07:08,166 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-20 21:07:08,180 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-20 21:07:08,183 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-20 21:07:08,185 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-07-20 21:07:08,185 INFO L275 PluginConnector]: CDTParser initialized
[2020-07-20 21:07:08,186 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/float_int_inv_square.c
[2020-07-20 21:07:08,264 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ca7e1d84/e86d6a55e6ce4c6f89bc800a3f7550da/FLAGfc0c5ed23
[2020-07-20 21:07:08,702 INFO L306 CDTParser]: Found 1 translation units.
[2020-07-20 21:07:08,703 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/float_int_inv_square.c
[2020-07-20 21:07:08,711 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ca7e1d84/e86d6a55e6ce4c6f89bc800a3f7550da/FLAGfc0c5ed23
[2020-07-20 21:07:09,113 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ca7e1d84/e86d6a55e6ce4c6f89bc800a3f7550da
[2020-07-20 21:07:09,126 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-20 21:07:09,129 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-20 21:07:09,133 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-20 21:07:09,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-20 21:07:09,138 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-20 21:07:09,139 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:07:09" (1/1) ...
[2020-07-20 21:07:09,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cb9b4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:09, skipping insertion in model container
[2020-07-20 21:07:09,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:07:09" (1/1) ...
[2020-07-20 21:07:09,153 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-07-20 21:07:09,177 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-07-20 21:07:09,380 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-07-20 21:07:09,385 INFO L203 MainTranslator]: Completed pre-run
[2020-07-20 21:07:09,401 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-07-20 21:07:09,416 INFO L208 MainTranslator]: Completed translation
[2020-07-20 21:07:09,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:09 WrapperNode
[2020-07-20 21:07:09,417 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-20 21:07:09,418 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-20 21:07:09,418 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-20 21:07:09,418 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-07-20 21:07:09,432 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:09" (1/1) ...
[2020-07-20 21:07:09,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:09" (1/1) ...
[2020-07-20 21:07:09,518 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:09" (1/1) ...
[2020-07-20 21:07:09,519 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:09" (1/1) ...
[2020-07-20 21:07:09,524 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:09" (1/1) ...
[2020-07-20 21:07:09,526 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:09" (1/1) ...
[2020-07-20 21:07:09,527 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:09" (1/1) ...
[2020-07-20 21:07:09,528 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-20 21:07:09,529 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-20 21:07:09,529 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-07-20 21:07:09,529 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-07-20 21:07:09,530 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:09" (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
[2020-07-20 21:07:09,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-20 21:07:09,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-20 21:07:09,582 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-07-20 21:07:09,582 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-07-20 21:07:09,582 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-07-20 21:07:09,583 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-20 21:07:09,583 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-07-20 21:07:09,584 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2020-07-20 21:07:09,584 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-07-20 21:07:09,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-07-20 21:07:09,585 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-07-20 21:07:09,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-20 21:07:09,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-20 21:07:09,762 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-20 21:07:09,763 INFO L295 CfgBuilder]: Removed 0 assume(true) statements.
[2020-07-20 21:07:09,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:07:09 BoogieIcfgContainer
[2020-07-20 21:07:09,766 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-20 21:07:09,767 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-20 21:07:09,768 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-07-20 21:07:09,770 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-07-20 21:07:09,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:07:09" (1/3) ...
[2020-07-20 21:07:09,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d58f380 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:07:09, skipping insertion in model container
[2020-07-20 21:07:09,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:09" (2/3) ...
[2020-07-20 21:07:09,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d58f380 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:07:09, skipping insertion in model container
[2020-07-20 21:07:09,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:07:09" (3/3) ...
[2020-07-20 21:07:09,774 INFO L109 eAbstractionObserver]: Analyzing ICFG float_int_inv_square.c
[2020-07-20 21:07:09,784 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-20 21:07:09,790 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-20 21:07:09,804 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-20 21:07:09,827 INFO L375 AbstractCegarLoop]: Interprodecural is true
[2020-07-20 21:07:09,827 INFO L376 AbstractCegarLoop]: Hoare is true
[2020-07-20 21:07:09,827 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-20 21:07:09,827 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-20 21:07:09,828 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-20 21:07:09,828 INFO L380 AbstractCegarLoop]: Difference is false
[2020-07-20 21:07:09,828 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-20 21:07:09,828 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-20 21:07:09,844 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states.
[2020-07-20 21:07:09,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2020-07-20 21:07:09,850 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 21:07:09,851 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 21:07:09,851 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 21:07:09,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 21:07:09,856 INFO L82 PathProgramCache]: Analyzing trace with hash 309552683, now seen corresponding path program 1 times
[2020-07-20 21:07:09,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 21:07:09,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782528555]
[2020-07-20 21:07:09,863 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:07:09,932 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 21:07:09,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 21:07:09,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 1 conjunts are in the unsatisfiable core
[2020-07-20 21:07:09,940 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 21:07:09,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 21:07:09,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 21:07:09,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782528555]
[2020-07-20 21:07:09,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 21:07:09,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2020-07-20 21:07:09,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039251962]
[2020-07-20 21:07:09,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states
[2020-07-20 21:07:09,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 21:07:09,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2020-07-20 21:07:09,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-07-20 21:07:09,988 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states.
[2020-07-20 21:07:10,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 21:07:10,013 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions.
[2020-07-20 21:07:10,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states.
[2020-07-20 21:07:10,018 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15
[2020-07-20 21:07:10,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 21:07:10,044 INFO L225 Difference]: With dead ends: 38
[2020-07-20 21:07:10,047 INFO L226 Difference]: Without dead ends: 16
[2020-07-20 21:07:10,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-07-20 21:07:10,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states.
[2020-07-20 21:07:10,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16.
[2020-07-20 21:07:10,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states.
[2020-07-20 21:07:10,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 15 transitions.
[2020-07-20 21:07:10,133 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 15 transitions. Word has length 15
[2020-07-20 21:07:10,133 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 21:07:10,134 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 15 transitions.
[2020-07-20 21:07:10,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states.
[2020-07-20 21:07:10,134 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 15 transitions.
[2020-07-20 21:07:10,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2020-07-20 21:07:10,136 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 21:07:10,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 21:07:10,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:07:10,352 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 21:07:10,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 21:07:10,352 INFO L82 PathProgramCache]: Analyzing trace with hash -499793943, now seen corresponding path program 1 times
[2020-07-20 21:07:10,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 21:07:10,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273870795]
[2020-07-20 21:07:10,353 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:07:10,386 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 21:07:10,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat
[2020-07-20 21:07:10,386 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-20 21:07:10,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-07-20 21:07:10,397 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-20 21:07:10,411 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-07-20 21:07:10,411 INFO L520 BasicCegarLoop]: Counterexample might be feasible
[2020-07-20 21:07:10,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:07:10,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 09:07:10 BoogieIcfgContainer
[2020-07-20 21:07:10,648 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-20 21:07:10,651 INFO L168 Benchmark]: Toolchain (without parser) took 1522.50 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 101.2 MB in the beginning and 138.5 MB in the end (delta: -37.3 MB). Peak memory consumption was 26.1 MB. Max. memory is 7.1 GB.
[2020-07-20 21:07:10,652 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
[2020-07-20 21:07:10,653 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.42 ms. Allocated memory is still 136.8 MB. Free memory was 101.0 MB in the beginning and 91.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB.
[2020-07-20 21:07:10,655 INFO L168 Benchmark]: Boogie Preprocessor took 110.51 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 91.5 MB in the beginning and 179.4 MB in the end (delta: -88.0 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB.
[2020-07-20 21:07:10,656 INFO L168 Benchmark]: RCFGBuilder took 237.66 ms. Allocated memory is still 200.3 MB. Free memory was 179.4 MB in the beginning and 166.7 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB.
[2020-07-20 21:07:10,656 INFO L168 Benchmark]: TraceAbstraction took 880.72 ms. Allocated memory is still 200.3 MB. Free memory was 166.0 MB in the beginning and 138.5 MB in the end (delta: 27.5 MB). Peak memory consumption was 27.5 MB. Max. memory is 7.1 GB.
[2020-07-20 21:07:10,660 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.23 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
* CACSL2BoogieTranslator took 284.42 ms. Allocated memory is still 136.8 MB. Free memory was 101.0 MB in the beginning and 91.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 110.51 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 91.5 MB in the beginning and 179.4 MB in the end (delta: -88.0 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 237.66 ms. Allocated memory is still 200.3 MB. Free memory was 179.4 MB in the beginning and 166.7 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 880.72 ms. Allocated memory is still 200.3 MB. Free memory was 166.0 MB in the beginning and 138.5 MB in the end (delta: 27.5 MB). Peak memory consumption was 27.5 MB. Max. memory is 7.1 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- UnprovableResult [Line: 9]: Unable to prove that call of __VERIFIER_error() unreachable
Unable to prove that call of __VERIFIER_error() unreachable
Reason: overapproximation of someBinaryFLOATComparisonOperation at line 20, overapproximation of someBinaryArithmeticFLOAToperation at line 19.
Possible FailurePath:
[L13] int x;
[L14] float y, z;
[L16] x = __VERIFIER_nondet_int()
[L17] CALL assume_abort_if_not(x >= -10 && x <= 10)
VAL [\old(cond)=1]
[L7] COND FALSE !(!cond)
VAL [\old(cond)=1, cond=1]
[L17] RET assume_abort_if_not(x >= -10 && x <= 10)
VAL [x=0]
[L19] y = x*x - 4.f
VAL [x=0]
[L20] CALL __VERIFIER_assert(y != 0.f)
VAL [\old(cond)=0]
[L9] COND TRUE !(cond)
VAL [\old(cond)=0, cond=0]
[L9] __VERIFIER_error()
VAL [\old(cond)=0, cond=0]
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 22 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred 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, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 30 NumberOfCodeBlocks, 27 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 196 SizeOfPredicates, 0 NumberOfNonLiveVariables, 30 ConjunctsInSsa, 1 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...