/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/s4iff.c
--------------------------------------------------------------------------------
This is Ultimate 0.1.25-c90d42b
[2020-09-25 08:00:54,184 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-09-25 08:00:54,189 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-25 08:00:54,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-25 08:00:54,238 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-25 08:00:54,249 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-25 08:00:54,251 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-25 08:00:54,255 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-25 08:00:54,258 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-25 08:00:54,262 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-09-25 08:00:54,264 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-09-25 08:00:54,265 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-25 08:00:54,265 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-25 08:00:54,268 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-25 08:00:54,273 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-25 08:00:54,275 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-25 08:00:54,278 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-25 08:00:54,279 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-25 08:00:54,281 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-25 08:00:54,289 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-25 08:00:54,292 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-25 08:00:54,293 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-25 08:00:54,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-09-25 08:00:54,296 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-25 08:00:54,301 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-25 08:00:54,301 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-25 08:00:54,301 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-25 08:00:54,305 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-25 08:00:54,305 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-25 08:00:54,306 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-25 08:00:54,307 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-25 08:00:54,307 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-25 08:00:54,308 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-25 08:00:54,309 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-25 08:00:54,311 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-25 08:00:54,311 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-25 08:00:54,312 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-09-25 08:00:54,312 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-09-25 08:00:54,312 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2020-09-25 08:00:54,314 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2020-09-25 08:00:54,315 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-09-25 08:00:54,316 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
[2020-09-25 08:00:54,368 INFO L113 SettingsManager]: Loading preferences was successful
[2020-09-25 08:00:54,368 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-25 08:00:54,370 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-25 08:00:54,370 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-09-25 08:00:54,371 INFO L138 SettingsManager]: * Use SBE=true
[2020-09-25 08:00:54,371 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-25 08:00:54,371 INFO L138 SettingsManager]: * sizeof long=4
[2020-09-25 08:00:54,372 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-09-25 08:00:54,372 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-09-25 08:00:54,372 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-09-25 08:00:54,373 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-09-25 08:00:54,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-25 08:00:54,374 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-09-25 08:00:54,374 INFO L138 SettingsManager]: * sizeof long double=12
[2020-09-25 08:00:54,375 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-09-25 08:00:54,375 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-09-25 08:00:54,375 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-09-25 08:00:54,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-25 08:00:54,375 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-09-25 08:00:54,376 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-09-25 08:00:54,376 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-09-25 08:00:54,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-25 08:00:54,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-25 08:00:54,377 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-09-25 08:00:54,377 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-25 08:00:54,377 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-09-25 08:00:54,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-25 08:00:54,378 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-25 08:00:54,378 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-09-25 08:00:54,378 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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true;
[2020-09-25 08:00:54,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-25 08:00:54,854 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-25 08:00:54,862 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-25 08:00:54,864 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-09-25 08:00:54,865 INFO L275 PluginConnector]: CDTParser initialized
[2020-09-25 08:00:54,866 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s4iff.c
[2020-09-25 08:00:54,953 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a833ac744/7dff2ff9739341838ad0104ee853797b/FLAGf6543215f
[2020-09-25 08:00:55,560 INFO L306 CDTParser]: Found 1 translation units.
[2020-09-25 08:00:55,561 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/s4iff.c
[2020-09-25 08:00:55,571 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a833ac744/7dff2ff9739341838ad0104ee853797b/FLAGf6543215f
[2020-09-25 08:00:55,893 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a833ac744/7dff2ff9739341838ad0104ee853797b
[2020-09-25 08:00:55,907 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-25 08:00:55,913 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-25 08:00:55,914 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-25 08:00:55,914 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-25 08:00:55,919 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-25 08:00:55,920 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:00:55" (1/1) ...
[2020-09-25 08:00:55,924 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13ad76f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:55, skipping insertion in model container
[2020-09-25 08:00:55,924 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:00:55" (1/1) ...
[2020-09-25 08:00:55,932 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-09-25 08:00:55,954 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-09-25 08:00:56,181 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-25 08:00:56,192 INFO L203 MainTranslator]: Completed pre-run
[2020-09-25 08:00:56,218 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-25 08:00:56,238 INFO L208 MainTranslator]: Completed translation
[2020-09-25 08:00:56,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:56 WrapperNode
[2020-09-25 08:00:56,239 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-25 08:00:56,240 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-25 08:00:56,240 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-25 08:00:56,240 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-09-25 08:00:56,344 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:56" (1/1) ...
[2020-09-25 08:00:56,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:56" (1/1) ...
[2020-09-25 08:00:56,354 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:56" (1/1) ...
[2020-09-25 08:00:56,356 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:56" (1/1) ...
[2020-09-25 08:00:56,367 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:56" (1/1) ...
[2020-09-25 08:00:56,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:56" (1/1) ...
[2020-09-25 08:00:56,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:56" (1/1) ...
[2020-09-25 08:00:56,378 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-25 08:00:56,378 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-25 08:00:56,378 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-09-25 08:00:56,378 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-09-25 08:00:56,380 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:56" (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
[2020-09-25 08:00:56,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-25 08:00:56,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-25 08:00:56,451 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-09-25 08:00:56,451 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-09-25 08:00:56,451 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-09-25 08:00:56,451 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-25 08:00:56,451 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2020-09-25 08:00:56,452 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-09-25 08:00:56,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-09-25 08:00:56,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-09-25 08:00:56,452 INFO L130 BoogieDeclarations]: Found specification of procedure malloc
[2020-09-25 08:00:56,452 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-09-25 08:00:56,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-09-25 08:00:56,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2020-09-25 08:00:56,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2020-09-25 08:00:56,453 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2020-09-25 08:00:56,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-09-25 08:00:56,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-25 08:00:56,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-25 08:00:56,819 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-25 08:00:56,819 INFO L295 CfgBuilder]: Removed 2 assume(true) statements.
[2020-09-25 08:00:56,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:00:56 BoogieIcfgContainer
[2020-09-25 08:00:56,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-25 08:00:56,827 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-25 08:00:56,827 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-09-25 08:00:56,831 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-09-25 08:00:56,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 08:00:55" (1/3) ...
[2020-09-25 08:00:56,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f8ebef1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:00:56, skipping insertion in model container
[2020-09-25 08:00:56,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:56" (2/3) ...
[2020-09-25 08:00:56,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f8ebef1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:00:56, skipping insertion in model container
[2020-09-25 08:00:56,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:00:56" (3/3) ...
[2020-09-25 08:00:56,836 INFO L109 eAbstractionObserver]: Analyzing ICFG s4iff.c
[2020-09-25 08:00:56,849 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-25 08:00:56,860 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-25 08:00:56,897 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-25 08:00:56,926 INFO L375 AbstractCegarLoop]: Interprodecural is true
[2020-09-25 08:00:56,927 INFO L376 AbstractCegarLoop]: Hoare is true
[2020-09-25 08:00:56,927 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-25 08:00:56,927 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-25 08:00:56,927 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-25 08:00:56,927 INFO L380 AbstractCegarLoop]: Difference is false
[2020-09-25 08:00:56,927 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-25 08:00:56,927 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-25 08:00:56,952 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states.
[2020-09-25 08:00:56,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2020-09-25 08:00:56,961 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 08:00:56,962 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, 1, 1, 1, 1, 1]
[2020-09-25 08:00:56,962 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 08:00:56,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 08:00:56,969 INFO L82 PathProgramCache]: Analyzing trace with hash 171473808, now seen corresponding path program 1 times
[2020-09-25 08:00:56,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 08:00:56,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897588875]
[2020-09-25 08:00:56,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 08:00:57,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 08:00:57,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:00:57,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:00:57,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 08:00:57,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42
[2020-09-25 08:00:57,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-25 08:00:57,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 263
[2020-09-25 08:00:57,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 08:00:57,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8
[2020-09-25 08:00:57,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 08:00:57,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34
[2020-09-25 08:00:57,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 08:00:57,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9
[2020-09-25 08:00:57,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 08:00:57,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 08:00:57,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:00:57,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 08:00:57,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12
[2020-09-25 08:00:57,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 08:00:57,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16
[2020-09-25 08:00:57,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 08:00:57,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8
[2020-09-25 08:00:57,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 08:00:57,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 08:00:57,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 08:00:57,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 08:00:57,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12
[2020-09-25 08:00:57,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 08:00:57,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:00:57,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 08:00:57,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10
[2020-09-25 08:00:57,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 08:00:57,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9
[2020-09-25 08:00:57,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 08:00:57,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8
[2020-09-25 08:00:57,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 08:00:57,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 08:00:57,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 08:00:57,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 08:00:57,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 08:00:57,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897588875]
[2020-09-25 08:00:57,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-25 08:00:57,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-09-25 08:00:57,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889277323]
[2020-09-25 08:00:57,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-09-25 08:00:57,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 08:00:57,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-09-25 08:00:57,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-09-25 08:00:57,610 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 3 states.
[2020-09-25 08:00:57,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 08:00:57,803 INFO L93 Difference]: Finished difference Result 113 states and 126 transitions.
[2020-09-25 08:00:57,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-09-25 08:00:57,806 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31
[2020-09-25 08:00:57,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 08:00:57,817 INFO L225 Difference]: With dead ends: 113
[2020-09-25 08:00:57,818 INFO L226 Difference]: Without dead ends: 53
[2020-09-25 08:00:57,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-09-25 08:00:57,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states.
[2020-09-25 08:00:57,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53.
[2020-09-25 08:00:57,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states.
[2020-09-25 08:00:57,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions.
[2020-09-25 08:00:57,877 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 31
[2020-09-25 08:00:57,877 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-25 08:00:57,878 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions.
[2020-09-25 08:00:57,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-09-25 08:00:57,878 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions.
[2020-09-25 08:00:57,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2020-09-25 08:00:57,879 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 08:00:57,880 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, 1, 1, 1, 1, 1]
[2020-09-25 08:00:57,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-25 08:00:57,880 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 08:00:57,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 08:00:57,881 INFO L82 PathProgramCache]: Analyzing trace with hash 921692051, now seen corresponding path program 1 times
[2020-09-25 08:00:57,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 08:00:57,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183794559]
[2020-09-25 08:00:57,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 08:00:57,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 08:00:57,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:00:57,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:00:58,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 08:00:58,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42
[2020-09-25 08:00:58,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-25 08:00:58,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 414
[2020-09-25 08:00:58,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 08:00:58,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8
[2020-09-25 08:00:58,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3
[2020-09-25 08:00:58,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18
[2020-09-25 08:00:58,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17
[2020-09-25 08:00:58,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 08:00:58,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 08:00:58,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 08:00:58,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:00:58,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 08:00:58,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12
[2020-09-25 08:00:58,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 08:00:58,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8
[2020-09-25 08:00:58,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 08:00:58,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8
[2020-09-25 08:00:58,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 08:00:58,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 08:00:58,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 08:00:58,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 08:00:58,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12
[2020-09-25 08:00:58,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 08:00:58,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:00:58,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 08:00:58,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10
[2020-09-25 08:00:58,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 08:00:58,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12
[2020-09-25 08:00:58,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 08:00:58,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8
[2020-09-25 08:00:58,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-25 08:00:58,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 08:00:58,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6
[2020-09-25 08:00:58,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 08:00:58,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 08:00:58,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183794559]
[2020-09-25 08:00:58,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-25 08:00:58,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-25 08:00:58,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913480792]
[2020-09-25 08:00:58,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-25 08:00:58,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 08:00:58,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-25 08:00:58,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-25 08:00:58,411 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 5 states.
[2020-09-25 08:00:58,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 08:00:58,581 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions.
[2020-09-25 08:00:58,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2020-09-25 08:00:58,582 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31
[2020-09-25 08:00:58,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 08:00:58,583 INFO L225 Difference]: With dead ends: 80
[2020-09-25 08:00:58,584 INFO L226 Difference]: Without dead ends: 55
[2020-09-25 08:00:58,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2020-09-25 08:00:58,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states.
[2020-09-25 08:00:58,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55.
[2020-09-25 08:00:58,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states.
[2020-09-25 08:00:58,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions.
[2020-09-25 08:00:58,596 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 31
[2020-09-25 08:00:58,597 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-25 08:00:58,597 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions.
[2020-09-25 08:00:58,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-25 08:00:58,597 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions.
[2020-09-25 08:00:58,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49
[2020-09-25 08:00:58,599 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 08:00:58,599 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 08:00:58,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-25 08:00:58,600 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 08:00:58,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 08:00:58,600 INFO L82 PathProgramCache]: Analyzing trace with hash -827220298, now seen corresponding path program 1 times
[2020-09-25 08:00:58,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 08:00:58,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402934743]
[2020-09-25 08:00:58,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 08:00:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 08:00:58,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:00:58,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:00:59,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:00:59,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:01:00,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:01:00,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:01:00,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:01:01,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:01:01,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:01:03,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 08:01:03,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59
[2020-09-25 08:01:03,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9
[2020-09-25 08:01:03,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007
[2020-09-25 08:01:03,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 08:01:03,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8
[2020-09-25 08:01:03,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19
[2020-09-25 08:01:03,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18
[2020-09-25 08:01:03,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40
[2020-09-25 08:01:03,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 08:01:04,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 08:01:04,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 08:01:04,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:01:04,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 08:01:04,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12
[2020-09-25 08:01:04,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 08:01:04,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7
[2020-09-25 08:01:04,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 08:01:04,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8
[2020-09-25 08:01:04,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 08:01:04,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 08:01:04,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 08:01:04,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 08:01:04,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12
[2020-09-25 08:01:04,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 08:01:04,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:01:04,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 08:01:04,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10
[2020-09-25 08:01:04,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 08:01:04,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10
[2020-09-25 08:01:04,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 08:01:04,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8
[2020-09-25 08:01:04,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-25 08:01:04,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 08:01:04,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6
[2020-09-25 08:01:04,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 08:01:04,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 08:01:04,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402934743]
[2020-09-25 08:01:04,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 08:01:04,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21
[2020-09-25 08:01:04,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395909989]
[2020-09-25 08:01:04,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states
[2020-09-25 08:01:04,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 08:01:04,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2020-09-25 08:01:04,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420
[2020-09-25 08:01:04,642 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 21 states.
[2020-09-25 08:01:06,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 08:01:06,747 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions.
[2020-09-25 08:01:06,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states.
[2020-09-25 08:01:06,749 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48
[2020-09-25 08:01:06,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 08:01:06,752 INFO L225 Difference]: With dead ends: 90
[2020-09-25 08:01:06,752 INFO L226 Difference]: Without dead ends: 84
[2020-09-25 08:01:06,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=288, Invalid=1272, Unknown=0, NotChecked=0, Total=1560
[2020-09-25 08:01:06,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states.
[2020-09-25 08:01:06,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 67.
[2020-09-25 08:01:06,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states.
[2020-09-25 08:01:06,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions.
[2020-09-25 08:01:06,765 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 48
[2020-09-25 08:01:06,767 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-25 08:01:06,767 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions.
[2020-09-25 08:01:06,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states.
[2020-09-25 08:01:06,775 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions.
[2020-09-25 08:01:06,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49
[2020-09-25 08:01:06,777 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 08:01:06,778 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 08:01:06,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-25 08:01:06,778 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 08:01:06,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 08:01:06,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1272927570, now seen corresponding path program 1 times
[2020-09-25 08:01:06,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 08:01:06,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721221810]
[2020-09-25 08:01:06,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 08:01:06,804 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2020-09-25 08:01:06,805 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility
[2020-09-25 08:01:06,805 INFO L520 BasicCegarLoop]: Counterexample might be feasible
[2020-09-25 08:01:06,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-09-25 08:01:06,844 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually.
[2020-09-25 08:01:06,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 08:01:06 BoogieIcfgContainer
[2020-09-25 08:01:06,845 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-09-25 08:01:06,850 INFO L168 Benchmark]: Toolchain (without parser) took 10938.18 ms. Allocated memory was 142.6 MB in the beginning and 290.5 MB in the end (delta: 147.8 MB). Free memory was 103.6 MB in the beginning and 257.7 MB in the end (delta: -154.2 MB). There was no memory consumed. Max. memory is 7.1 GB.
[2020-09-25 08:01:06,851 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 142.6 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB.
[2020-09-25 08:01:06,853 INFO L168 Benchmark]: CACSL2BoogieTranslator took 325.14 ms. Allocated memory is still 142.6 MB. Free memory was 102.9 MB in the beginning and 92.4 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB.
[2020-09-25 08:01:06,855 INFO L168 Benchmark]: Boogie Preprocessor took 138.11 ms. Allocated memory was 142.6 MB in the beginning and 203.9 MB in the end (delta: 61.3 MB). Free memory was 92.4 MB in the beginning and 181.3 MB in the end (delta: -88.9 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB.
[2020-09-25 08:01:06,857 INFO L168 Benchmark]: RCFGBuilder took 447.35 ms. Allocated memory is still 203.9 MB. Free memory was 181.3 MB in the beginning and 162.1 MB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB.
[2020-09-25 08:01:06,863 INFO L168 Benchmark]: TraceAbstraction took 10018.40 ms. Allocated memory was 203.9 MB in the beginning and 290.5 MB in the end (delta: 86.5 MB). Free memory was 161.4 MB in the beginning and 257.7 MB in the end (delta: -96.3 MB). There was no memory consumed. Max. memory is 7.1 GB.
[2020-09-25 08:01:06,867 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.20 ms. Allocated memory is still 142.6 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB.
* CACSL2BoogieTranslator took 325.14 ms. Allocated memory is still 142.6 MB. Free memory was 102.9 MB in the beginning and 92.4 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 138.11 ms. Allocated memory was 142.6 MB in the beginning and 203.9 MB in the end (delta: 61.3 MB). Free memory was 92.4 MB in the beginning and 181.3 MB in the end (delta: -88.9 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 447.35 ms. Allocated memory is still 203.9 MB. Free memory was 181.3 MB in the beginning and 162.1 MB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 10018.40 ms. Allocated memory was 203.9 MB in the beginning and 290.5 MB in the end (delta: 86.5 MB). Free memory was 161.4 MB in the beginning and 257.7 MB in the end (delta: -96.3 MB). There was no memory consumed. Max. memory is 7.1 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- UnprovableResult [Line: 13]: 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:
[L17] int N;
[L21] N = __VERIFIER_nondet_int()
[L22] COND FALSE !(N <= 0)
[L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int))
[L11] COND FALSE !(!cond)
[L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int))
[L25] int i;
[L26] long long sum[1];
[L27] int *a = malloc(sizeof(int)*N);
[L29] sum[0] = 1
[L30] i=0
[L30] COND TRUE i<N
[L32] a[i] = 4
[L30] i++
[L30] COND FALSE !(i<N)
[L35] i=0
[L35] COND TRUE i<N
[L37] EXPR a[i]
[L37] COND FALSE !(a[i] == 4)
[L40] EXPR sum[0]
[L40] EXPR a[i]
[L40] sum[0] = sum[0] * a[i]
[L35] i++
[L35] COND FALSE !(i<N)
[L44] EXPR sum[0]
[L44] CALL __VERIFIER_assert(sum[0] == 5*N)
[L13] COND TRUE !(cond)
[L13] __VERIFIER_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 5 procedures, 65 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 9.8s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 147 SDtfs, 380 SDslu, 205 SDs, 0 SdLazy, 638 SolverSat, 57 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=3, 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, 3 MinimizatonAttempts, 17 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 6.9s InterpolantComputationTime, 110 NumberOfCodeBlocks, 110 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 107 ConstructedInterpolants, 0 QuantifiedInterpolants, 34529 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 0/2 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...