/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 true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/sqrt1.c
--------------------------------------------------------------------------------
This is Ultimate 0.1.25-c90d42b
[2020-09-24 20:44:21,136 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-09-24 20:44:21,141 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-24 20:44:21,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-24 20:44:21,188 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-24 20:44:21,196 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-24 20:44:21,198 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-24 20:44:21,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-24 20:44:21,205 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-24 20:44:21,208 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-09-24 20:44:21,209 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-09-24 20:44:21,210 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-24 20:44:21,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-24 20:44:21,213 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-24 20:44:21,216 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-24 20:44:21,218 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-24 20:44:21,220 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-24 20:44:21,221 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-24 20:44:21,223 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-24 20:44:21,231 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-24 20:44:21,233 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-24 20:44:21,234 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-24 20:44:21,235 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-09-24 20:44:21,236 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-24 20:44:21,248 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-24 20:44:21,249 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-24 20:44:21,249 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-24 20:44:21,255 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-24 20:44:21,256 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-24 20:44:21,257 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-24 20:44:21,260 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-24 20:44:21,261 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-24 20:44:21,262 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-24 20:44:21,263 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-24 20:44:21,266 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-24 20:44:21,266 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-24 20:44:21,267 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-09-24 20:44:21,267 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-09-24 20:44:21,267 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2020-09-24 20:44:21,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2020-09-24 20:44:21,269 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-09-24 20:44:21,272 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 20:44:21,313 INFO L113 SettingsManager]: Loading preferences was successful
[2020-09-24 20:44:21,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-24 20:44:21,316 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-24 20:44:21,316 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-09-24 20:44:21,316 INFO L138 SettingsManager]: * Use SBE=true
[2020-09-24 20:44:21,316 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-24 20:44:21,317 INFO L138 SettingsManager]: * sizeof long=4
[2020-09-24 20:44:21,317 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-09-24 20:44:21,317 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-09-24 20:44:21,317 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-09-24 20:44:21,318 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-09-24 20:44:21,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-24 20:44:21,319 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-09-24 20:44:21,319 INFO L138 SettingsManager]: * sizeof long double=12
[2020-09-24 20:44:21,319 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-09-24 20:44:21,319 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-09-24 20:44:21,320 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-09-24 20:44:21,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-24 20:44:21,320 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-09-24 20:44:21,320 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-09-24 20:44:21,320 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-09-24 20:44:21,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 20:44:21,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-24 20:44:21,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-09-24 20:44:21,321 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-24 20:44:21,322 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-09-24 20:44:21,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-24 20:44:21,322 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-24 20:44:21,322 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-09-24 20:44:21,322 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 -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;
[2020-09-24 20:44:21,782 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-24 20:44:21,808 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-24 20:44:21,815 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-24 20:44:21,817 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-09-24 20:44:21,818 INFO L275 PluginConnector]: CDTParser initialized
[2020-09-24 20:44:21,819 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/sqrt1.c
[2020-09-24 20:44:21,909 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8ddf9e9d6/9f1381c01bce4b43bc1831d15a502ec8/FLAGe6d50c74c
[2020-09-24 20:44:22,460 INFO L306 CDTParser]: Found 1 translation units.
[2020-09-24 20:44:22,461 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/nla-digbench/sqrt1.c
[2020-09-24 20:44:22,471 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8ddf9e9d6/9f1381c01bce4b43bc1831d15a502ec8/FLAGe6d50c74c
[2020-09-24 20:44:22,801 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8ddf9e9d6/9f1381c01bce4b43bc1831d15a502ec8
[2020-09-24 20:44:22,818 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-24 20:44:22,824 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-24 20:44:22,828 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-24 20:44:22,829 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-24 20:44:22,833 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-24 20:44:22,834 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:44:22" (1/1) ...
[2020-09-24 20:44:22,840 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75a18185 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:22, skipping insertion in model container
[2020-09-24 20:44:22,840 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:44:22" (1/1) ...
[2020-09-24 20:44:22,851 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-09-24 20:44:22,881 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-09-24 20:44:23,119 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-24 20:44:23,128 INFO L203 MainTranslator]: Completed pre-run
[2020-09-24 20:44:23,170 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-24 20:44:23,191 INFO L208 MainTranslator]: Completed translation
[2020-09-24 20:44:23,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:23 WrapperNode
[2020-09-24 20:44:23,192 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-24 20:44:23,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-24 20:44:23,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-24 20:44:23,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-09-24 20:44:23,208 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:23" (1/1) ...
[2020-09-24 20:44:23,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:23" (1/1) ...
[2020-09-24 20:44:23,216 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:23" (1/1) ...
[2020-09-24 20:44:23,216 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:23" (1/1) ...
[2020-09-24 20:44:23,220 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:23" (1/1) ...
[2020-09-24 20:44:23,304 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:23" (1/1) ...
[2020-09-24 20:44:23,306 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:23" (1/1) ...
[2020-09-24 20:44:23,312 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-24 20:44:23,312 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-24 20:44:23,313 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-09-24 20:44:23,313 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-09-24 20:44:23,316 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:23" (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 20:44:23,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-24 20:44:23,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-24 20:44:23,387 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-09-24 20:44:23,387 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-09-24 20:44:23,387 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-09-24 20:44:23,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-24 20:44:23,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-09-24 20:44:23,388 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2020-09-24 20:44:23,388 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-09-24 20:44:23,388 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-09-24 20:44:23,388 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-09-24 20:44:23,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-24 20:44:23,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-24 20:44:23,729 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-24 20:44:23,730 INFO L295 CfgBuilder]: Removed 1 assume(true) statements.
[2020-09-24 20:44:23,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:44:23 BoogieIcfgContainer
[2020-09-24 20:44:23,734 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-24 20:44:23,736 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-24 20:44:23,736 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-09-24 20:44:23,741 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-09-24 20:44:23,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 08:44:22" (1/3) ...
[2020-09-24 20:44:23,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c26fd54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:44:23, skipping insertion in model container
[2020-09-24 20:44:23,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:23" (2/3) ...
[2020-09-24 20:44:23,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c26fd54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:44:23, skipping insertion in model container
[2020-09-24 20:44:23,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:44:23" (3/3) ...
[2020-09-24 20:44:23,746 INFO L109 eAbstractionObserver]: Analyzing ICFG sqrt1.c
[2020-09-24 20:44:23,758 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-24 20:44:23,769 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-24 20:44:23,792 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-24 20:44:23,824 INFO L375 AbstractCegarLoop]: Interprodecural is true
[2020-09-24 20:44:23,824 INFO L376 AbstractCegarLoop]: Hoare is true
[2020-09-24 20:44:23,824 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-24 20:44:23,825 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-24 20:44:23,825 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-24 20:44:23,825 INFO L380 AbstractCegarLoop]: Difference is false
[2020-09-24 20:44:23,825 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-24 20:44:23,825 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-24 20:44:23,845 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states.
[2020-09-24 20:44:23,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2020-09-24 20:44:23,852 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 20:44:23,853 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 20:44:23,853 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 20:44:23,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 20:44:23,860 INFO L82 PathProgramCache]: Analyzing trace with hash 37246768, now seen corresponding path program 1 times
[2020-09-24 20:44:23,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 20:44:23,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189501872]
[2020-09-24 20:44:23,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 20:44:23,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:44:23,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:44:24,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:44:24,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:44:24,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28
[2020-09-24 20:44:24,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 20:44:24,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185
[2020-09-24 20:44:24,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:44:24,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5
[2020-09-24 20:44:24,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18
[2020-09-24 20:44:24,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9
[2020-09-24 20:44:24,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4
[2020-09-24 20:44:24,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 20:44:24,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:44:24,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:44:24,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:44:24,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 20:44:24,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 20:44:24,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-09-24 20:44:24,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:44:24,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 20:44:24,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 20:44:24,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 20:44:24,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 20:44:24,329 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 20:44:24,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189501872]
[2020-09-24 20:44:24,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 20:44:24,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-09-24 20:44:24,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330783421]
[2020-09-24 20:44:24,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-09-24 20:44:24,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 20:44:24,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-09-24 20:44:24,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2020-09-24 20:44:24,360 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 6 states.
[2020-09-24 20:44:24,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 20:44:24,548 INFO L93 Difference]: Finished difference Result 74 states and 111 transitions.
[2020-09-24 20:44:24,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2020-09-24 20:44:24,551 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19
[2020-09-24 20:44:24,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 20:44:24,562 INFO L225 Difference]: With dead ends: 74
[2020-09-24 20:44:24,562 INFO L226 Difference]: Without dead ends: 44
[2020-09-24 20:44:24,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2020-09-24 20:44:24,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states.
[2020-09-24 20:44:24,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41.
[2020-09-24 20:44:24,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states.
[2020-09-24 20:44:24,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions.
[2020-09-24 20:44:24,626 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 19
[2020-09-24 20:44:24,627 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 20:44:24,627 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions.
[2020-09-24 20:44:24,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-09-24 20:44:24,627 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions.
[2020-09-24 20:44:24,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2020-09-24 20:44:24,629 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 20:44:24,630 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 20:44:24,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-24 20:44:24,631 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 20:44:24,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 20:44:24,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1680832565, now seen corresponding path program 1 times
[2020-09-24 20:44:24,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 20:44:24,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016993974]
[2020-09-24 20:44:24,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 20:44:24,644 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2020-09-24 20:44:24,645 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility
[2020-09-24 20:44:24,645 INFO L520 BasicCegarLoop]: Counterexample might be feasible
[2020-09-24 20:44:24,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-24 20:44:24,670 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually.
[2020-09-24 20:44:24,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 08:44:24 BoogieIcfgContainer
[2020-09-24 20:44:24,671 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-09-24 20:44:24,675 INFO L168 Benchmark]: Toolchain (without parser) took 1853.97 ms. Allocated memory was 139.5 MB in the beginning and 200.3 MB in the end (delta: 60.8 MB). Free memory was 102.9 MB in the beginning and 120.7 MB in the end (delta: -17.8 MB). Peak memory consumption was 43.0 MB. Max. memory is 7.1 GB.
[2020-09-24 20:44:24,676 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 139.5 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
[2020-09-24 20:44:24,677 INFO L168 Benchmark]: CACSL2BoogieTranslator took 364.17 ms. Allocated memory is still 139.5 MB. Free memory was 102.2 MB in the beginning and 92.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB.
[2020-09-24 20:44:24,679 INFO L168 Benchmark]: Boogie Preprocessor took 119.13 ms. Allocated memory was 139.5 MB in the beginning and 200.3 MB in the end (delta: 60.8 MB). Free memory was 92.6 MB in the beginning and 179.3 MB in the end (delta: -86.7 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB.
[2020-09-24 20:44:24,680 INFO L168 Benchmark]: RCFGBuilder took 422.05 ms. Allocated memory is still 200.3 MB. Free memory was 179.3 MB in the beginning and 165.1 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB.
[2020-09-24 20:44:24,681 INFO L168 Benchmark]: TraceAbstraction took 935.59 ms. Allocated memory is still 200.3 MB. Free memory was 164.4 MB in the beginning and 120.7 MB in the end (delta: 43.7 MB). Peak memory consumption was 43.7 MB. Max. memory is 7.1 GB.
[2020-09-24 20:44:24,685 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 139.5 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
* CACSL2BoogieTranslator took 364.17 ms. Allocated memory is still 139.5 MB. Free memory was 102.2 MB in the beginning and 92.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 119.13 ms. Allocated memory was 139.5 MB in the beginning and 200.3 MB in the end (delta: 60.8 MB). Free memory was 92.6 MB in the beginning and 179.3 MB in the end (delta: -86.7 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 422.05 ms. Allocated memory is still 200.3 MB. Free memory was 179.3 MB in the beginning and 165.1 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 935.59 ms. Allocated memory is still 200.3 MB. Free memory was 164.4 MB in the beginning and 120.7 MB in the end (delta: 43.7 MB). Peak memory consumption was 43.7 MB. Max. memory is 7.1 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- UnprovableResult [Line: 12]: Unable to prove that call of __VERIFIER_error() unreachable
Unable to prove that call of __VERIFIER_error() unreachable
Reason: unable to decide satisfiability of path constraint.
Possible FailurePath:
[L19] int n, a, s, t;
[L20] n = __VERIFIER_nondet_int()
[L22] a = 0
[L23] s = 1
[L24] t = 1
[L26] COND TRUE 1
[L27] CALL __VERIFIER_assert(t == 2*a + 1)
[L10] COND FALSE !(!(cond))
[L27] RET __VERIFIER_assert(t == 2*a + 1)
[L28] CALL __VERIFIER_assert(s == (a + 1) * (a + 1))
[L10] COND TRUE !(cond)
[L12] __VERIFIER_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 5 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 42 SDtfs, 17 SDslu, 112 SDs, 0 SdLazy, 25 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=1, 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, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 19 NumberOfCodeBlocks, 19 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 972 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...