/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=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/heap-manipulation/merge_sort-1.i
--------------------------------------------------------------------------------
This is Ultimate 0.1.25-c90d42b
[2020-09-24 21:36:29,464 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-09-24 21:36:29,468 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-24 21:36:29,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-24 21:36:29,495 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-24 21:36:29,497 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-24 21:36:29,498 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-24 21:36:29,500 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-24 21:36:29,502 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-24 21:36:29,506 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-09-24 21:36:29,507 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-09-24 21:36:29,508 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-24 21:36:29,509 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-24 21:36:29,510 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-24 21:36:29,514 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-24 21:36:29,516 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-24 21:36:29,519 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-24 21:36:29,523 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-24 21:36:29,526 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-24 21:36:29,529 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-24 21:36:29,532 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-24 21:36:29,534 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-24 21:36:29,536 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-09-24 21:36:29,537 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-24 21:36:29,544 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-24 21:36:29,544 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-24 21:36:29,544 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-24 21:36:29,548 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-24 21:36:29,549 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-24 21:36:29,551 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-24 21:36:29,551 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-24 21:36:29,552 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-24 21:36:29,553 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-24 21:36:29,554 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-24 21:36:29,565 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-24 21:36:29,565 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-24 21:36:29,569 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-09-24 21:36:29,569 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-09-24 21:36:29,569 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2020-09-24 21:36:29,571 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2020-09-24 21:36:29,571 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-09-24 21:36:29,572 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 21:36:29,624 INFO L113 SettingsManager]: Loading preferences was successful
[2020-09-24 21:36:29,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-24 21:36:29,626 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-24 21:36:29,627 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-09-24 21:36:29,627 INFO L138 SettingsManager]: * Use SBE=true
[2020-09-24 21:36:29,627 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-24 21:36:29,628 INFO L138 SettingsManager]: * sizeof long=4
[2020-09-24 21:36:29,628 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-09-24 21:36:29,628 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-09-24 21:36:29,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-09-24 21:36:29,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-09-24 21:36:29,630 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-24 21:36:29,630 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-09-24 21:36:29,630 INFO L138 SettingsManager]: * sizeof long double=12
[2020-09-24 21:36:29,633 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-09-24 21:36:29,633 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-09-24 21:36:29,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-09-24 21:36:29,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-24 21:36:29,633 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-09-24 21:36:29,634 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-09-24 21:36:29,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-09-24 21:36:29,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 21:36:29,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-24 21:36:29,634 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-09-24 21:36:29,634 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-24 21:36:29,634 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-09-24 21:36:29,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-24 21:36:29,635 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-24 21:36:29,635 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-09-24 21:36:29,635 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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;log-additional-information=true;
[2020-09-24 21:36:30,140 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-24 21:36:30,157 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-24 21:36:30,162 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-24 21:36:30,164 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-09-24 21:36:30,165 INFO L275 PluginConnector]: CDTParser initialized
[2020-09-24 21:36:30,166 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/merge_sort-1.i
[2020-09-24 21:36:30,256 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ba1abf41d/c8ebbeea6cd449e0a47c3d36f3dcd082/FLAG5e511c2b3
[2020-09-24 21:36:30,905 INFO L306 CDTParser]: Found 1 translation units.
[2020-09-24 21:36:30,905 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-manipulation/merge_sort-1.i
[2020-09-24 21:36:30,920 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ba1abf41d/c8ebbeea6cd449e0a47c3d36f3dcd082/FLAG5e511c2b3
[2020-09-24 21:36:31,159 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ba1abf41d/c8ebbeea6cd449e0a47c3d36f3dcd082
[2020-09-24 21:36:31,172 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-24 21:36:31,176 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-24 21:36:31,177 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-24 21:36:31,177 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-24 21:36:31,183 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-24 21:36:31,184 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:36:31" (1/1) ...
[2020-09-24 21:36:31,188 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68352751 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:36:31, skipping insertion in model container
[2020-09-24 21:36:31,189 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:36:31" (1/1) ...
[2020-09-24 21:36:31,197 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-09-24 21:36:31,252 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-09-24 21:36:31,753 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-24 21:36:31,774 INFO L203 MainTranslator]: Completed pre-run
[2020-09-24 21:36:31,887 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-24 21:36:31,945 INFO L208 MainTranslator]: Completed translation
[2020-09-24 21:36:31,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:36:31 WrapperNode
[2020-09-24 21:36:31,950 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-24 21:36:31,953 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-24 21:36:31,953 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-24 21:36:31,953 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-09-24 21:36:31,980 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:36:31" (1/1) ...
[2020-09-24 21:36:31,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:36:31" (1/1) ...
[2020-09-24 21:36:32,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:36:31" (1/1) ...
[2020-09-24 21:36:32,023 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:36:31" (1/1) ...
[2020-09-24 21:36:32,048 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:36:31" (1/1) ...
[2020-09-24 21:36:32,060 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:36:31" (1/1) ...
[2020-09-24 21:36:32,065 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:36:31" (1/1) ...
[2020-09-24 21:36:32,074 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-24 21:36:32,074 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-24 21:36:32,074 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-09-24 21:36:32,075 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-09-24 21:36:32,076 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:36:31" (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 21:36:32,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-24 21:36:32,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-24 21:36:32,152 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32
[2020-09-24 21:36:32,152 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64
[2020-09-24 21:36:32,152 INFO L138 BoogieDeclarations]: Found implementation of procedure fail
[2020-09-24 21:36:32,153 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node
[2020-09-24 21:36:32,153 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_pair
[2020-09-24 21:36:32,153 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_sort_core
[2020-09-24 21:36:32,153 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_before
[2020-09-24 21:36:32,153 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_after
[2020-09-24 21:36:32,154 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-09-24 21:36:32,154 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-24 21:36:32,154 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32
[2020-09-24 21:36:32,154 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64
[2020-09-24 21:36:32,154 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max
[2020-09-24 21:36:32,155 INFO L130 BoogieDeclarations]: Found specification of procedure atof
[2020-09-24 21:36:32,155 INFO L130 BoogieDeclarations]: Found specification of procedure atoi
[2020-09-24 21:36:32,155 INFO L130 BoogieDeclarations]: Found specification of procedure atol
[2020-09-24 21:36:32,155 INFO L130 BoogieDeclarations]: Found specification of procedure atoll
[2020-09-24 21:36:32,156 INFO L130 BoogieDeclarations]: Found specification of procedure strtod
[2020-09-24 21:36:32,157 INFO L130 BoogieDeclarations]: Found specification of procedure strtof
[2020-09-24 21:36:32,157 INFO L130 BoogieDeclarations]: Found specification of procedure strtold
[2020-09-24 21:36:32,158 INFO L130 BoogieDeclarations]: Found specification of procedure strtol
[2020-09-24 21:36:32,158 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul
[2020-09-24 21:36:32,160 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq
[2020-09-24 21:36:32,160 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq
[2020-09-24 21:36:32,160 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll
[2020-09-24 21:36:32,161 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull
[2020-09-24 21:36:32,161 INFO L130 BoogieDeclarations]: Found specification of procedure l64a
[2020-09-24 21:36:32,161 INFO L130 BoogieDeclarations]: Found specification of procedure a64l
[2020-09-24 21:36:32,161 INFO L130 BoogieDeclarations]: Found specification of procedure select
[2020-09-24 21:36:32,161 INFO L130 BoogieDeclarations]: Found specification of procedure pselect
[2020-09-24 21:36:32,161 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major
[2020-09-24 21:36:32,161 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor
[2020-09-24 21:36:32,162 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev
[2020-09-24 21:36:32,162 INFO L130 BoogieDeclarations]: Found specification of procedure random
[2020-09-24 21:36:32,162 INFO L130 BoogieDeclarations]: Found specification of procedure srandom
[2020-09-24 21:36:32,162 INFO L130 BoogieDeclarations]: Found specification of procedure initstate
[2020-09-24 21:36:32,162 INFO L130 BoogieDeclarations]: Found specification of procedure setstate
[2020-09-24 21:36:32,162 INFO L130 BoogieDeclarations]: Found specification of procedure random_r
[2020-09-24 21:36:32,162 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r
[2020-09-24 21:36:32,163 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r
[2020-09-24 21:36:32,163 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r
[2020-09-24 21:36:32,163 INFO L130 BoogieDeclarations]: Found specification of procedure rand
[2020-09-24 21:36:32,163 INFO L130 BoogieDeclarations]: Found specification of procedure srand
[2020-09-24 21:36:32,163 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r
[2020-09-24 21:36:32,163 INFO L130 BoogieDeclarations]: Found specification of procedure drand48
[2020-09-24 21:36:32,163 INFO L130 BoogieDeclarations]: Found specification of procedure erand48
[2020-09-24 21:36:32,163 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48
[2020-09-24 21:36:32,164 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48
[2020-09-24 21:36:32,164 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48
[2020-09-24 21:36:32,164 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48
[2020-09-24 21:36:32,164 INFO L130 BoogieDeclarations]: Found specification of procedure srand48
[2020-09-24 21:36:32,164 INFO L130 BoogieDeclarations]: Found specification of procedure seed48
[2020-09-24 21:36:32,164 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48
[2020-09-24 21:36:32,164 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r
[2020-09-24 21:36:32,165 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r
[2020-09-24 21:36:32,165 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r
[2020-09-24 21:36:32,165 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r
[2020-09-24 21:36:32,165 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r
[2020-09-24 21:36:32,165 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r
[2020-09-24 21:36:32,165 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r
[2020-09-24 21:36:32,165 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r
[2020-09-24 21:36:32,166 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r
[2020-09-24 21:36:32,166 INFO L130 BoogieDeclarations]: Found specification of procedure malloc
[2020-09-24 21:36:32,166 INFO L130 BoogieDeclarations]: Found specification of procedure calloc
[2020-09-24 21:36:32,166 INFO L130 BoogieDeclarations]: Found specification of procedure realloc
[2020-09-24 21:36:32,166 INFO L130 BoogieDeclarations]: Found specification of procedure free
[2020-09-24 21:36:32,166 INFO L130 BoogieDeclarations]: Found specification of procedure cfree
[2020-09-24 21:36:32,167 INFO L130 BoogieDeclarations]: Found specification of procedure alloca
[2020-09-24 21:36:32,167 INFO L130 BoogieDeclarations]: Found specification of procedure valloc
[2020-09-24 21:36:32,167 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign
[2020-09-24 21:36:32,167 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2020-09-24 21:36:32,167 INFO L130 BoogieDeclarations]: Found specification of procedure atexit
[2020-09-24 21:36:32,167 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit
[2020-09-24 21:36:32,168 INFO L130 BoogieDeclarations]: Found specification of procedure exit
[2020-09-24 21:36:32,168 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit
[2020-09-24 21:36:32,168 INFO L130 BoogieDeclarations]: Found specification of procedure getenv
[2020-09-24 21:36:32,168 INFO L130 BoogieDeclarations]: Found specification of procedure putenv
[2020-09-24 21:36:32,168 INFO L130 BoogieDeclarations]: Found specification of procedure setenv
[2020-09-24 21:36:32,168 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv
[2020-09-24 21:36:32,168 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv
[2020-09-24 21:36:32,169 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp
[2020-09-24 21:36:32,169 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp
[2020-09-24 21:36:32,169 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps
[2020-09-24 21:36:32,169 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp
[2020-09-24 21:36:32,169 INFO L130 BoogieDeclarations]: Found specification of procedure system
[2020-09-24 21:36:32,169 INFO L130 BoogieDeclarations]: Found specification of procedure realpath
[2020-09-24 21:36:32,170 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch
[2020-09-24 21:36:32,170 INFO L130 BoogieDeclarations]: Found specification of procedure qsort
[2020-09-24 21:36:32,170 INFO L130 BoogieDeclarations]: Found specification of procedure abs
[2020-09-24 21:36:32,170 INFO L130 BoogieDeclarations]: Found specification of procedure labs
[2020-09-24 21:36:32,170 INFO L130 BoogieDeclarations]: Found specification of procedure llabs
[2020-09-24 21:36:32,170 INFO L130 BoogieDeclarations]: Found specification of procedure div
[2020-09-24 21:36:32,170 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv
[2020-09-24 21:36:32,171 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv
[2020-09-24 21:36:32,171 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt
[2020-09-24 21:36:32,171 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt
[2020-09-24 21:36:32,171 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt
[2020-09-24 21:36:32,171 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt
[2020-09-24 21:36:32,171 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt
[2020-09-24 21:36:32,171 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt
[2020-09-24 21:36:32,171 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r
[2020-09-24 21:36:32,171 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r
[2020-09-24 21:36:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r
[2020-09-24 21:36:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r
[2020-09-24 21:36:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure mblen
[2020-09-24 21:36:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc
[2020-09-24 21:36:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb
[2020-09-24 21:36:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs
[2020-09-24 21:36:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs
[2020-09-24 21:36:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch
[2020-09-24 21:36:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt
[2020-09-24 21:36:32,173 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg
[2020-09-24 21:36:32,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-09-24 21:36:32,173 INFO L130 BoogieDeclarations]: Found specification of procedure fail
[2020-09-24 21:36:32,173 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node
[2020-09-24 21:36:32,173 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2020-09-24 21:36:32,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2020-09-24 21:36:32,174 INFO L130 BoogieDeclarations]: Found specification of procedure merge_pair
[2020-09-24 21:36:32,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-09-24 21:36:32,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2020-09-24 21:36:32,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-09-24 21:36:32,174 INFO L130 BoogieDeclarations]: Found specification of procedure seq_sort_core
[2020-09-24 21:36:32,174 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_before
[2020-09-24 21:36:32,174 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_after
[2020-09-24 21:36:32,174 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-09-24 21:36:32,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2020-09-24 21:36:32,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2020-09-24 21:36:32,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-24 21:36:32,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-24 21:36:33,131 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-24 21:36:33,131 INFO L295 CfgBuilder]: Removed 33 assume(true) statements.
[2020-09-24 21:36:33,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:36:33 BoogieIcfgContainer
[2020-09-24 21:36:33,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-24 21:36:33,140 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-24 21:36:33,140 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-09-24 21:36:33,144 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-09-24 21:36:33,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:36:31" (1/3) ...
[2020-09-24 21:36:33,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df94c23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:36:33, skipping insertion in model container
[2020-09-24 21:36:33,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:36:31" (2/3) ...
[2020-09-24 21:36:33,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df94c23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:36:33, skipping insertion in model container
[2020-09-24 21:36:33,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:36:33" (3/3) ...
[2020-09-24 21:36:33,148 INFO L109 eAbstractionObserver]: Analyzing ICFG merge_sort-1.i
[2020-09-24 21:36:33,160 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-24 21:36:33,170 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-24 21:36:33,192 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-24 21:36:33,225 INFO L375 AbstractCegarLoop]: Interprodecural is true
[2020-09-24 21:36:33,225 INFO L376 AbstractCegarLoop]: Hoare is true
[2020-09-24 21:36:33,225 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-24 21:36:33,225 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-24 21:36:33,226 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-24 21:36:33,226 INFO L380 AbstractCegarLoop]: Difference is false
[2020-09-24 21:36:33,226 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-24 21:36:33,226 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-24 21:36:33,256 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states.
[2020-09-24 21:36:33,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2020-09-24 21:36:33,265 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 21:36:33,266 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 21:36:33,267 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 21:36:33,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 21:36:33,275 INFO L82 PathProgramCache]: Analyzing trace with hash -2091922853, now seen corresponding path program 1 times
[2020-09-24 21:36:33,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 21:36:33,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465733787]
[2020-09-24 21:36:33,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 21:36:33,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:36:33,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:36:33,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:36:33,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:36:33,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:36:33,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26
[2020-09-24 21:36:33,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-09-24 21:36:33,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 338
[2020-09-24 21:36:33,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:36:33,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 21:36:33,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14
[2020-09-24 21:36:33,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3
[2020-09-24 21:36:33,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3
[2020-09-24 21:36:33,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 21:36:33,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:36:33,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:36:33,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:36:33,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 21:36:33,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 21:36:33,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13
[2020-09-24 21:36:33,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:36:33,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 21:36:33,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 21:36:33,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 21:36:33,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 21:36:33,866 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 21:36:33,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465733787]
[2020-09-24 21:36:33,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 21:36:33,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-09-24 21:36:33,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654520264]
[2020-09-24 21:36:33,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-09-24 21:36:33,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 21:36:33,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-09-24 21:36:33,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-24 21:36:33,899 INFO L87 Difference]: Start difference. First operand 248 states. Second operand 4 states.
[2020-09-24 21:36:34,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 21:36:34,535 INFO L93 Difference]: Finished difference Result 524 states and 685 transitions.
[2020-09-24 21:36:34,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2020-09-24 21:36:34,538 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15
[2020-09-24 21:36:34,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 21:36:34,558 INFO L225 Difference]: With dead ends: 524
[2020-09-24 21:36:34,558 INFO L226 Difference]: Without dead ends: 253
[2020-09-24 21:36:34,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-09-24 21:36:34,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states.
[2020-09-24 21:36:34,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 226.
[2020-09-24 21:36:34,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states.
[2020-09-24 21:36:34,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 249 transitions.
[2020-09-24 21:36:34,652 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 249 transitions. Word has length 15
[2020-09-24 21:36:34,652 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 21:36:34,652 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 249 transitions.
[2020-09-24 21:36:34,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-09-24 21:36:34,653 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 249 transitions.
[2020-09-24 21:36:34,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34
[2020-09-24 21:36:34,654 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 21:36:34,654 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, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 21:36:34,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-24 21:36:34,655 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 21:36:34,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 21:36:34,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1052511289, now seen corresponding path program 1 times
[2020-09-24 21:36:34,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 21:36:34,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896073154]
[2020-09-24 21:36:34,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 21:36:34,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:36:34,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:36:34,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:36:34,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:36:35,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:36:35,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44
[2020-09-24 21:36:35,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-09-24 21:36:35,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 803
[2020-09-24 21:36:35,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:36:35,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-09-24 21:36:35,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25
[2020-09-24 21:36:35,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15
[2020-09-24 21:36:35,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 21:36:35,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 21:36:35,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:36:35,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:36:35,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:36:35,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 21:36:35,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 21:36:35,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8
[2020-09-24 21:36:35,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:36:35,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 21:36:35,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 21:36:35,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 21:36:35,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 21:36:35,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 21:36:35,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896073154]
[2020-09-24 21:36:35,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 21:36:35,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2020-09-24 21:36:35,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9388335]
[2020-09-24 21:36:35,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-09-24 21:36:35,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 21:36:35,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-09-24 21:36:35,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56
[2020-09-24 21:36:35,629 INFO L87 Difference]: Start difference. First operand 226 states and 249 transitions. Second operand 8 states.
[2020-09-24 21:36:36,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 21:36:36,743 INFO L93 Difference]: Finished difference Result 318 states and 355 transitions.
[2020-09-24 21:36:36,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2020-09-24 21:36:36,744 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33
[2020-09-24 21:36:36,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 21:36:36,748 INFO L225 Difference]: With dead ends: 318
[2020-09-24 21:36:36,750 INFO L226 Difference]: Without dead ends: 313
[2020-09-24 21:36:36,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132
[2020-09-24 21:36:36,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states.
[2020-09-24 21:36:36,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 231.
[2020-09-24 21:36:36,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states.
[2020-09-24 21:36:36,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 254 transitions.
[2020-09-24 21:36:36,806 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 254 transitions. Word has length 33
[2020-09-24 21:36:36,806 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 21:36:36,806 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 254 transitions.
[2020-09-24 21:36:36,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-09-24 21:36:36,806 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 254 transitions.
[2020-09-24 21:36:36,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43
[2020-09-24 21:36:36,810 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 21:36:36,810 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 21:36:36,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-24 21:36:36,811 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 21:36:36,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 21:36:36,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1386814406, now seen corresponding path program 1 times
[2020-09-24 21:36:36,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 21:36:36,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394866523]
[2020-09-24 21:36:36,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 21:36:36,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:36:36,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:36:36,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:36:37,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:36:37,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53
[2020-09-24 21:36:37,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 21:36:37,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 865
[2020-09-24 21:36:37,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:36:37,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7
[2020-09-24 21:36:37,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14
[2020-09-24 21:36:37,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34
[2020-09-24 21:36:37,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 21:36:37,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 21:36:37,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:36:37,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:36:37,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:36:37,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 21:36:37,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 21:36:37,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9
[2020-09-24 21:36:37,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:36:37,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 21:36:37,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 21:36:37,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 21:36:37,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 21:36:37,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 21:36:37,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394866523]
[2020-09-24 21:36:37,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 21:36:37,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9
[2020-09-24 21:36:37,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712795692]
[2020-09-24 21:36:37,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states
[2020-09-24 21:36:37,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 21:36:37,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2020-09-24 21:36:37,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72
[2020-09-24 21:36:37,985 INFO L87 Difference]: Start difference. First operand 231 states and 254 transitions. Second operand 9 states.
[2020-09-24 21:36:39,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 21:36:39,778 INFO L93 Difference]: Finished difference Result 390 states and 435 transitions.
[2020-09-24 21:36:39,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states.
[2020-09-24 21:36:39,779 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42
[2020-09-24 21:36:39,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 21:36:39,789 INFO L225 Difference]: With dead ends: 390
[2020-09-24 21:36:39,789 INFO L226 Difference]: Without dead ends: 386
[2020-09-24 21:36:39,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272
[2020-09-24 21:36:39,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states.
[2020-09-24 21:36:39,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 303.
[2020-09-24 21:36:39,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states.
[2020-09-24 21:36:39,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 337 transitions.
[2020-09-24 21:36:39,846 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 337 transitions. Word has length 42
[2020-09-24 21:36:39,847 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 21:36:39,847 INFO L479 AbstractCegarLoop]: Abstraction has 303 states and 337 transitions.
[2020-09-24 21:36:39,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states.
[2020-09-24 21:36:39,847 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 337 transitions.
[2020-09-24 21:36:39,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43
[2020-09-24 21:36:39,848 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 21:36:39,850 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 21:36:39,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-24 21:36:39,850 INFO L427 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 21:36:39,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 21:36:39,851 INFO L82 PathProgramCache]: Analyzing trace with hash 527521680, now seen corresponding path program 1 times
[2020-09-24 21:36:39,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 21:36:39,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529234394]
[2020-09-24 21:36:39,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 21:36:39,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:36:39,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:36:39,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:36:40,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:36:40,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53
[2020-09-24 21:36:40,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 21:36:40,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 672
[2020-09-24 21:36:40,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:36:40,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7
[2020-09-24 21:36:40,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14
[2020-09-24 21:36:40,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29
[2020-09-24 21:36:40,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 21:36:40,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 21:36:40,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:36:40,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:36:40,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:36:40,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 21:36:40,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 21:36:40,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7
[2020-09-24 21:36:40,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:36:40,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 21:36:40,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 21:36:40,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 21:36:40,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 21:36:40,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 21:36:40,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529234394]
[2020-09-24 21:36:40,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 21:36:40,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9
[2020-09-24 21:36:40,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741815136]
[2020-09-24 21:36:40,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states
[2020-09-24 21:36:40,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 21:36:40,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2020-09-24 21:36:40,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72
[2020-09-24 21:36:40,696 INFO L87 Difference]: Start difference. First operand 303 states and 337 transitions. Second operand 9 states.
[2020-09-24 21:36:41,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 21:36:41,929 INFO L93 Difference]: Finished difference Result 498 states and 552 transitions.
[2020-09-24 21:36:41,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states.
[2020-09-24 21:36:41,930 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42
[2020-09-24 21:36:41,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 21:36:41,933 INFO L225 Difference]: With dead ends: 498
[2020-09-24 21:36:41,933 INFO L226 Difference]: Without dead ends: 303
[2020-09-24 21:36:41,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240
[2020-09-24 21:36:41,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states.
[2020-09-24 21:36:41,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 274.
[2020-09-24 21:36:41,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states.
[2020-09-24 21:36:41,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 300 transitions.
[2020-09-24 21:36:41,953 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 300 transitions. Word has length 42
[2020-09-24 21:36:41,954 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 21:36:41,954 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 300 transitions.
[2020-09-24 21:36:41,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states.
[2020-09-24 21:36:41,954 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 300 transitions.
[2020-09-24 21:36:41,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47
[2020-09-24 21:36:41,956 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 21:36:41,956 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, 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 21:36:41,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-09-24 21:36:41,956 INFO L427 AbstractCegarLoop]: === Iteration 5 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 21:36:41,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 21:36:41,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1598586176, now seen corresponding path program 1 times
[2020-09-24 21:36:41,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 21:36:41,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114874831]
[2020-09-24 21:36:41,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 21:36:41,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:36:42,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:36:42,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:36:42,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:36:42,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57
[2020-09-24 21:36:42,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 21:36:42,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 762
[2020-09-24 21:36:42,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:36:42,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9
[2020-09-24 21:36:42,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18
[2020-09-24 21:36:42,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34
[2020-09-24 21:36:42,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 21:36:42,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 21:36:42,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:36:42,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:36:42,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:36:42,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 21:36:42,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 21:36:42,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6
[2020-09-24 21:36:42,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:36:42,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 21:36:42,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 21:36:42,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 21:36:42,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 21:36:42,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 21:36:42,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114874831]
[2020-09-24 21:36:42,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 21:36:42,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10
[2020-09-24 21:36:42,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192769268]
[2020-09-24 21:36:42,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states
[2020-09-24 21:36:42,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 21:36:42,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2020-09-24 21:36:42,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90
[2020-09-24 21:36:42,879 INFO L87 Difference]: Start difference. First operand 274 states and 300 transitions. Second operand 10 states.
[2020-09-24 21:36:44,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 21:36:44,173 INFO L93 Difference]: Finished difference Result 343 states and 380 transitions.
[2020-09-24 21:36:44,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states.
[2020-09-24 21:36:44,173 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46
[2020-09-24 21:36:44,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 21:36:44,178 INFO L225 Difference]: With dead ends: 343
[2020-09-24 21:36:44,178 INFO L226 Difference]: Without dead ends: 339
[2020-09-24 21:36:44,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240
[2020-09-24 21:36:44,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states.
[2020-09-24 21:36:44,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 281.
[2020-09-24 21:36:44,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states.
[2020-09-24 21:36:44,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 307 transitions.
[2020-09-24 21:36:44,194 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 307 transitions. Word has length 46
[2020-09-24 21:36:44,195 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 21:36:44,195 INFO L479 AbstractCegarLoop]: Abstraction has 281 states and 307 transitions.
[2020-09-24 21:36:44,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states.
[2020-09-24 21:36:44,195 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 307 transitions.
[2020-09-24 21:36:44,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53
[2020-09-24 21:36:44,197 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 21:36:44,197 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, 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]
[2020-09-24 21:36:44,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-09-24 21:36:44,197 INFO L427 AbstractCegarLoop]: === Iteration 6 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 21:36:44,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 21:36:44,198 INFO L82 PathProgramCache]: Analyzing trace with hash 797684937, now seen corresponding path program 1 times
[2020-09-24 21:36:44,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 21:36:44,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535686351]
[2020-09-24 21:36:44,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 21:36:44,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-09-24 21:36:44,221 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-09-24 21:36:44,221 INFO L520 BasicCegarLoop]: Counterexample might be feasible
[2020-09-24 21:36:44,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-09-24 21:36:44,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 09:36:44 BoogieIcfgContainer
[2020-09-24 21:36:44,250 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-09-24 21:36:44,254 INFO L168 Benchmark]: Toolchain (without parser) took 13078.82 ms. Allocated memory was 139.5 MB in the beginning and 361.8 MB in the end (delta: 222.3 MB). Free memory was 101.4 MB in the beginning and 283.8 MB in the end (delta: -182.4 MB). Peak memory consumption was 39.9 MB. Max. memory is 7.1 GB.
[2020-09-24 21:36:44,254 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.5 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB.
[2020-09-24 21:36:44,255 INFO L168 Benchmark]: CACSL2BoogieTranslator took 774.47 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 100.5 MB in the beginning and 167.7 MB in the end (delta: -67.2 MB). Peak memory consumption was 25.4 MB. Max. memory is 7.1 GB.
[2020-09-24 21:36:44,256 INFO L168 Benchmark]: Boogie Preprocessor took 121.41 ms. Allocated memory is still 202.9 MB. Free memory was 167.7 MB in the beginning and 163.7 MB in the end (delta: 3.9 MB). Peak memory consumption was 3.9 MB. Max. memory is 7.1 GB.
[2020-09-24 21:36:44,257 INFO L168 Benchmark]: RCFGBuilder took 1064.17 ms. Allocated memory was 202.9 MB in the beginning and 235.9 MB in the end (delta: 33.0 MB). Free memory was 163.7 MB in the beginning and 201.3 MB in the end (delta: -37.6 MB). Peak memory consumption was 80.9 MB. Max. memory is 7.1 GB.
[2020-09-24 21:36:44,258 INFO L168 Benchmark]: TraceAbstraction took 11110.47 ms. Allocated memory was 235.9 MB in the beginning and 361.8 MB in the end (delta: 125.8 MB). Free memory was 201.3 MB in the beginning and 283.8 MB in the end (delta: -82.5 MB). Peak memory consumption was 43.3 MB. Max. memory is 7.1 GB.
[2020-09-24 21:36:44,262 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.5 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB.
* CACSL2BoogieTranslator took 774.47 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 100.5 MB in the beginning and 167.7 MB in the end (delta: -67.2 MB). Peak memory consumption was 25.4 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 121.41 ms. Allocated memory is still 202.9 MB. Free memory was 167.7 MB in the beginning and 163.7 MB in the end (delta: 3.9 MB). Peak memory consumption was 3.9 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 1064.17 ms. Allocated memory was 202.9 MB in the beginning and 235.9 MB in the end (delta: 33.0 MB). Free memory was 163.7 MB in the beginning and 201.3 MB in the end (delta: -37.6 MB). Peak memory consumption was 80.9 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 11110.47 ms. Allocated memory was 235.9 MB in the beginning and 361.8 MB in the end (delta: 125.8 MB). Free memory was 201.3 MB in the beginning and 283.8 MB in the end (delta: -82.5 MB). Peak memory consumption was 43.3 MB. Max. memory is 7.1 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- CounterExampleResult [Line: 554]: a call of __VERIFIER_error() is reachable
a call of __VERIFIER_error() is reachable
We found a FailurePath:
[L627] struct list *data = ((void *)0);
[L628] COND TRUE __VERIFIER_nondet_int()
[L629] struct node *node = malloc(sizeof *node);
[L630] COND FALSE !(!node)
[L632] node->next = node
[L633] node->value = __VERIFIER_nondet_int()
[L634] struct list *item = malloc(sizeof *item);
[L635] COND FALSE !(!item)
[L637] item->slist = node
[L638] item->next = data
[L639] data = item
[L628] COND FALSE !(__VERIFIER_nondet_int())
[L641] COND FALSE !(!data)
[L643] CALL inspect_before(data)
[L604] COND FALSE !(!(shape))
[L605] shape->next
[L605] COND FALSE !(shape->next)
[L611] COND FALSE !(!(shape))
[L612] EXPR shape->next
[L612] COND FALSE !(!(shape->next == ((void *)0)))
[L613] EXPR shape->slist
[L613] COND FALSE !(!(shape->slist))
[L614] EXPR shape->slist
[L614] EXPR shape->slist->next
[L614] COND TRUE !(shape->slist->next == ((void *)0))
[L614] CALL fail()
[L554] __VERIFIER_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 11 procedures, 258 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 11.0s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 6.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1202 SDtfs, 1589 SDslu, 2622 SDs, 0 SdLazy, 4260 SolverSat, 184 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=303occurred 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: 0.2s AutomataMinimizationTime, 5 MinimizatonAttempts, 279 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 4.2s InterpolantComputationTime, 230 NumberOfCodeBlocks, 230 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 173 ConstructedInterpolants, 0 QuantifiedInterpolants, 58754 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 4/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be incorrect!
Received shutdown request...