/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/reducercommutativity/rangesum.i


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


This is Ultimate 0.1.25-d623d84
[2020-07-20 17:36:20,845 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-07-20 17:36:20,849 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-20 17:36:20,875 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-20 17:36:20,875 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-20 17:36:20,879 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-20 17:36:20,881 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-20 17:36:20,894 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-07-20 17:36:20,898 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-07-20 17:36:20,901 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-07-20 17:36:20,903 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-07-20 17:36:20,904 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-20 17:36:20,905 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-20 17:36:20,908 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-20 17:36:20,911 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-20 17:36:20,913 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-20 17:36:20,916 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-20 17:36:20,917 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-20 17:36:20,919 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-20 17:36:20,927 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-20 17:36:20,933 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-20 17:36:20,939 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-20 17:36:20,940 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-07-20 17:36:20,941 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-20 17:36:20,944 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-20 17:36:20,944 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-20 17:36:20,944 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-20 17:36:20,949 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-20 17:36:20,950 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-07-20 17:36:20,952 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-07-20 17:36:20,953 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
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[2020-07-20 17:36:20,957 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-07-20 17:36:20,958 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-20 17:36:20,958 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2020-07-20 17:36:20,959 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-07-20 17:36:20,961 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-07-20 17:36:20,963 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-07-20 17:36:21,006 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-07-20 17:36:21,006 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-20 17:36:21,010 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-20 17:36:21,010 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-07-20 17:36:21,011 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-07-20 17:36:21,011 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-20 17:36:21,014 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-07-20 17:36:21,014 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-07-20 17:36:21,015 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-07-20 17:36:21,015 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-07-20 17:36:21,015 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-07-20 17:36:21,016 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-20 17:36:21,016 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-07-20 17:36:21,019 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-07-20 17:36:21,020 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-07-20 17:36:21,020 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-07-20 17:36:21,020 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-07-20 17:36:21,020 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-20 17:36:21,021 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-07-20 17:36:21,021 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-07-20 17:36:21,021 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-07-20 17:36:21,022 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 17:36:21,023 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-20 17:36:21,023 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-07-20 17:36:21,024 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-20 17:36:21,024 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-07-20 17:36:21,024 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:36:21,024 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-20 17:36:21,024 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-07-20 17:36:21,025 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4
[2020-07-20 17:36:21,362 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-20 17:36:21,377 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-20 17:36:21,381 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-20 17:36:21,383 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-07-20 17:36:21,383 INFO  L275        PluginConnector]: CDTParser initialized
[2020-07-20 17:36:21,384 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum.i
[2020-07-20 17:36:21,461 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af79f0089/d040105b209b4ee2abe5554bc64e0f3c/FLAGca2af478c
[2020-07-20 17:36:22,020 INFO  L306              CDTParser]: Found 1 translation units.
[2020-07-20 17:36:22,021 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum.i
[2020-07-20 17:36:22,032 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af79f0089/d040105b209b4ee2abe5554bc64e0f3c/FLAGca2af478c
[2020-07-20 17:36:22,318 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af79f0089/d040105b209b4ee2abe5554bc64e0f3c
[2020-07-20 17:36:22,327 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-20 17:36:22,330 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-20 17:36:22,331 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-20 17:36:22,331 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-20 17:36:22,336 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-20 17:36:22,337 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:36:22" (1/1) ...
[2020-07-20 17:36:22,340 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57f1137b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:22, skipping insertion in model container
[2020-07-20 17:36:22,340 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:36:22" (1/1) ...
[2020-07-20 17:36:22,349 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-07-20 17:36:22,369 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-07-20 17:36:22,577 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 17:36:22,590 INFO  L203         MainTranslator]: Completed pre-run
[2020-07-20 17:36:22,626 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 17:36:22,650 INFO  L208         MainTranslator]: Completed translation
[2020-07-20 17:36:22,651 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:22 WrapperNode
[2020-07-20 17:36:22,651 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-20 17:36:22,652 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-20 17:36:22,652 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-20 17:36:22,652 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-07-20 17:36:22,785 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:22" (1/1) ...
[2020-07-20 17:36:22,785 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:22" (1/1) ...
[2020-07-20 17:36:22,813 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:22" (1/1) ...
[2020-07-20 17:36:22,814 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:22" (1/1) ...
[2020-07-20 17:36:22,833 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:22" (1/1) ...
[2020-07-20 17:36:22,845 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:22" (1/1) ...
[2020-07-20 17:36:22,850 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:22" (1/1) ...
[2020-07-20 17:36:22,859 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-20 17:36:22,860 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-20 17:36:22,860 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-07-20 17:36:22,861 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-07-20 17:36:22,862 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:22" (1/1) ...
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 17:36:22,940 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-20 17:36:22,940 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-20 17:36:22,940 INFO  L138     BoogieDeclarations]: Found implementation of procedure init_nondet
[2020-07-20 17:36:22,940 INFO  L138     BoogieDeclarations]: Found implementation of procedure rangesum
[2020-07-20 17:36:22,941 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-07-20 17:36:22,941 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-20 17:36:22,941 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-07-20 17:36:22,942 INFO  L130     BoogieDeclarations]: Found specification of procedure init_nondet
[2020-07-20 17:36:22,942 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2020-07-20 17:36:22,942 INFO  L130     BoogieDeclarations]: Found specification of procedure rangesum
[2020-07-20 17:36:22,942 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2020-07-20 17:36:22,943 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-07-20 17:36:22,943 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-07-20 17:36:22,943 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-07-20 17:36:22,943 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-20 17:36:22,943 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-20 17:36:23,336 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-20 17:36:23,336 INFO  L295             CfgBuilder]: Removed 3 assume(true) statements.
[2020-07-20 17:36:23,343 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:36:23 BoogieIcfgContainer
[2020-07-20 17:36:23,343 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-20 17:36:23,345 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-20 17:36:23,346 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-07-20 17:36:23,349 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-07-20 17:36:23,350 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:36:22" (1/3) ...
[2020-07-20 17:36:23,352 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c29d46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:36:23, skipping insertion in model container
[2020-07-20 17:36:23,352 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:22" (2/3) ...
[2020-07-20 17:36:23,352 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c29d46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:36:23, skipping insertion in model container
[2020-07-20 17:36:23,353 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:36:23" (3/3) ...
[2020-07-20 17:36:23,355 INFO  L109   eAbstractionObserver]: Analyzing ICFG rangesum.i
[2020-07-20 17:36:23,369 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-20 17:36:23,379 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-20 17:36:23,400 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-20 17:36:23,449 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-07-20 17:36:23,450 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-07-20 17:36:23,450 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-20 17:36:23,450 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-20 17:36:23,450 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-20 17:36:23,451 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-07-20 17:36:23,451 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-20 17:36:23,451 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-20 17:36:23,474 INFO  L276                IsEmpty]: Start isEmpty. Operand 39 states.
[2020-07-20 17:36:23,484 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 39
[2020-07-20 17:36:23,484 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:36:23,486 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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]
[2020-07-20 17:36:23,486 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:36:23,493 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:36:23,494 INFO  L82        PathProgramCache]: Analyzing trace with hash -1377249276, now seen corresponding path program 1 times
[2020-07-20 17:36:23,505 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:36:23,506 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284728638]
[2020-07-20 17:36:23,506 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:36:23,702 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 17:36:23,703 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:36:23,707 INFO  L263         TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 17:36:23,717 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:36:23,784 INFO  L134       CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked.
[2020-07-20 17:36:23,784 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 17:36:23,786 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284728638]
[2020-07-20 17:36:23,789 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 17:36:23,790 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 17:36:23,793 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425490144]
[2020-07-20 17:36:23,806 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 17:36:23,807 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:36:23,824 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 17:36:23,825 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 17:36:23,828 INFO  L87              Difference]: Start difference. First operand 39 states. Second operand 3 states.
[2020-07-20 17:36:24,076 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:36:24,076 INFO  L93              Difference]: Finished difference Result 73 states and 101 transitions.
[2020-07-20 17:36:24,077 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 17:36:24,079 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 38
[2020-07-20 17:36:24,079 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:36:24,090 INFO  L225             Difference]: With dead ends: 73
[2020-07-20 17:36:24,091 INFO  L226             Difference]: Without dead ends: 39
[2020-07-20 17:36:24,096 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 17:36:24,115 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 39 states.
[2020-07-20 17:36:24,143 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37.
[2020-07-20 17:36:24,145 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 37 states.
[2020-07-20 17:36:24,147 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions.
[2020-07-20 17:36:24,149 INFO  L78                 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 38
[2020-07-20 17:36:24,149 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:36:24,149 INFO  L479      AbstractCegarLoop]: Abstraction has 37 states and 45 transitions.
[2020-07-20 17:36:24,150 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 17:36:24,150 INFO  L276                IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions.
[2020-07-20 17:36:24,153 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 39
[2020-07-20 17:36:24,154 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:36:24,154 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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]
[2020-07-20 17:36:24,361 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:36:24,362 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:36:24,363 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:36:24,363 INFO  L82        PathProgramCache]: Analyzing trace with hash -1742767491, now seen corresponding path program 1 times
[2020-07-20 17:36:24,364 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:36:24,364 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392190565]
[2020-07-20 17:36:24,365 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:36:24,469 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 17:36:24,470 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:36:24,471 INFO  L263         TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 17:36:24,477 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:36:24,516 INFO  L134       CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked.
[2020-07-20 17:36:24,517 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 17:36:24,518 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392190565]
[2020-07-20 17:36:24,518 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 17:36:24,518 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-07-20 17:36:24,518 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718013723]
[2020-07-20 17:36:24,521 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-07-20 17:36:24,522 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:36:24,522 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-07-20 17:36:24,522 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2020-07-20 17:36:24,523 INFO  L87              Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 4 states.
[2020-07-20 17:36:24,621 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:36:24,622 INFO  L93              Difference]: Finished difference Result 65 states and 81 transitions.
[2020-07-20 17:36:24,624 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-07-20 17:36:24,624 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 38
[2020-07-20 17:36:24,625 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:36:24,627 INFO  L225             Difference]: With dead ends: 65
[2020-07-20 17:36:24,628 INFO  L226             Difference]: Without dead ends: 39
[2020-07-20 17:36:24,630 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2020-07-20 17:36:24,630 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 39 states.
[2020-07-20 17:36:24,641 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38.
[2020-07-20 17:36:24,641 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 38 states.
[2020-07-20 17:36:24,644 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions.
[2020-07-20 17:36:24,645 INFO  L78                 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 38
[2020-07-20 17:36:24,646 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:36:24,646 INFO  L479      AbstractCegarLoop]: Abstraction has 38 states and 46 transitions.
[2020-07-20 17:36:24,647 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-07-20 17:36:24,647 INFO  L276                IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions.
[2020-07-20 17:36:24,649 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 41
[2020-07-20 17:36:24,649 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:36:24,650 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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]
[2020-07-20 17:36:24,862 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:36:24,863 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:36:24,863 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:36:24,864 INFO  L82        PathProgramCache]: Analyzing trace with hash 558201179, now seen corresponding path program 1 times
[2020-07-20 17:36:24,864 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:36:24,864 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489032728]
[2020-07-20 17:36:24,865 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:36:24,939 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 17:36:24,939 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:36:24,941 INFO  L263         TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core
[2020-07-20 17:36:24,945 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:36:24,990 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked.
[2020-07-20 17:36:24,991 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 17:36:25,124 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked.
[2020-07-20 17:36:25,125 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489032728]
[2020-07-20 17:36:25,125 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 17:36:25,125 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8
[2020-07-20 17:36:25,126 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613290421]
[2020-07-20 17:36:25,126 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-07-20 17:36:25,127 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:36:25,127 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-07-20 17:36:25,128 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56
[2020-07-20 17:36:25,128 INFO  L87              Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 8 states.
[2020-07-20 17:36:25,293 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:36:25,294 INFO  L93              Difference]: Finished difference Result 67 states and 83 transitions.
[2020-07-20 17:36:25,294 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-07-20 17:36:25,295 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 40
[2020-07-20 17:36:25,295 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:36:25,296 INFO  L225             Difference]: With dead ends: 67
[2020-07-20 17:36:25,297 INFO  L226             Difference]: Without dead ends: 41
[2020-07-20 17:36:25,298 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72
[2020-07-20 17:36:25,299 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 41 states.
[2020-07-20 17:36:25,305 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40.
[2020-07-20 17:36:25,305 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 40 states.
[2020-07-20 17:36:25,307 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions.
[2020-07-20 17:36:25,307 INFO  L78                 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 40
[2020-07-20 17:36:25,307 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:36:25,307 INFO  L479      AbstractCegarLoop]: Abstraction has 40 states and 48 transitions.
[2020-07-20 17:36:25,307 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-07-20 17:36:25,308 INFO  L276                IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions.
[2020-07-20 17:36:25,309 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 43
[2020-07-20 17:36:25,310 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:36:25,310 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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]
[2020-07-20 17:36:25,523 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:36:25,524 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:36:25,525 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:36:25,525 INFO  L82        PathProgramCache]: Analyzing trace with hash -119064391, now seen corresponding path program 2 times
[2020-07-20 17:36:25,525 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:36:25,525 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23867536]
[2020-07-20 17:36:25,526 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:36:25,584 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 17:36:25,585 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:36:25,586 INFO  L263         TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 17:36:25,589 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:36:25,613 INFO  L134       CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked.
[2020-07-20 17:36:25,614 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 17:36:25,615 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23867536]
[2020-07-20 17:36:25,615 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 17:36:25,615 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-07-20 17:36:25,615 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687283103]
[2020-07-20 17:36:25,616 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-07-20 17:36:25,616 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:36:25,617 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-07-20 17:36:25,617 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2020-07-20 17:36:25,618 INFO  L87              Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 4 states.
[2020-07-20 17:36:25,703 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:36:25,703 INFO  L93              Difference]: Finished difference Result 65 states and 84 transitions.
[2020-07-20 17:36:25,704 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-07-20 17:36:25,704 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 42
[2020-07-20 17:36:25,704 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:36:25,707 INFO  L225             Difference]: With dead ends: 65
[2020-07-20 17:36:25,708 INFO  L226             Difference]: Without dead ends: 43
[2020-07-20 17:36:25,708 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2020-07-20 17:36:25,709 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 43 states.
[2020-07-20 17:36:25,720 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42.
[2020-07-20 17:36:25,720 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 42 states.
[2020-07-20 17:36:25,722 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions.
[2020-07-20 17:36:25,722 INFO  L78                 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 42
[2020-07-20 17:36:25,723 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:36:25,723 INFO  L479      AbstractCegarLoop]: Abstraction has 42 states and 50 transitions.
[2020-07-20 17:36:25,723 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-07-20 17:36:25,723 INFO  L276                IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions.
[2020-07-20 17:36:25,725 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 52
[2020-07-20 17:36:25,725 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:36:25,725 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 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]
[2020-07-20 17:36:25,940 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:36:25,941 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:36:25,942 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:36:25,942 INFO  L82        PathProgramCache]: Analyzing trace with hash -12268618, now seen corresponding path program 1 times
[2020-07-20 17:36:25,943 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:36:25,943 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375118749]
[2020-07-20 17:36:25,944 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:36:26,002 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 17:36:26,003 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:36:26,005 INFO  L263         TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core
[2020-07-20 17:36:26,008 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:36:26,052 INFO  L134       CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked.
[2020-07-20 17:36:26,052 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 17:36:26,159 INFO  L134       CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked.
[2020-07-20 17:36:26,160 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375118749]
[2020-07-20 17:36:26,160 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 17:36:26,160 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8
[2020-07-20 17:36:26,161 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326675725]
[2020-07-20 17:36:26,162 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-07-20 17:36:26,162 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:36:26,163 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-07-20 17:36:26,163 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56
[2020-07-20 17:36:26,163 INFO  L87              Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 8 states.
[2020-07-20 17:36:26,299 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:36:26,299 INFO  L93              Difference]: Finished difference Result 70 states and 89 transitions.
[2020-07-20 17:36:26,301 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-07-20 17:36:26,301 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 51
[2020-07-20 17:36:26,302 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:36:26,303 INFO  L225             Difference]: With dead ends: 70
[2020-07-20 17:36:26,303 INFO  L226             Difference]: Without dead ends: 46
[2020-07-20 17:36:26,304 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72
[2020-07-20 17:36:26,305 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 46 states.
[2020-07-20 17:36:26,320 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45.
[2020-07-20 17:36:26,320 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 45 states.
[2020-07-20 17:36:26,322 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions.
[2020-07-20 17:36:26,327 INFO  L78                 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 51
[2020-07-20 17:36:26,328 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:36:26,329 INFO  L479      AbstractCegarLoop]: Abstraction has 45 states and 53 transitions.
[2020-07-20 17:36:26,329 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-07-20 17:36:26,329 INFO  L276                IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions.
[2020-07-20 17:36:26,330 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 61
[2020-07-20 17:36:26,331 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:36:26,331 INFO  L422         BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 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]
[2020-07-20 17:36:26,533 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:36:26,534 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:36:26,535 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:36:26,535 INFO  L82        PathProgramCache]: Analyzing trace with hash 456134489, now seen corresponding path program 2 times
[2020-07-20 17:36:26,535 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:36:26,536 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042277684]
[2020-07-20 17:36:26,538 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:36:26,623 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 17:36:26,623 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:36:26,625 INFO  L263         TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 17:36:26,628 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:36:26,658 INFO  L134       CoverageAnalysis]: Checked inductivity of 82 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked.
[2020-07-20 17:36:26,659 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 17:36:26,674 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042277684]
[2020-07-20 17:36:26,675 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 17:36:26,676 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-07-20 17:36:26,676 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923947128]
[2020-07-20 17:36:26,677 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-07-20 17:36:26,677 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:36:26,677 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-07-20 17:36:26,678 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2020-07-20 17:36:26,678 INFO  L87              Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 4 states.
[2020-07-20 17:36:26,767 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:36:26,768 INFO  L93              Difference]: Finished difference Result 69 states and 82 transitions.
[2020-07-20 17:36:26,769 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-07-20 17:36:26,769 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 60
[2020-07-20 17:36:26,770 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:36:26,771 INFO  L225             Difference]: With dead ends: 69
[2020-07-20 17:36:26,772 INFO  L226             Difference]: Without dead ends: 47
[2020-07-20 17:36:26,773 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2020-07-20 17:36:26,773 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 47 states.
[2020-07-20 17:36:26,780 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46.
[2020-07-20 17:36:26,780 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 46 states.
[2020-07-20 17:36:26,781 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions.
[2020-07-20 17:36:26,781 INFO  L78                 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 60
[2020-07-20 17:36:26,782 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:36:26,782 INFO  L479      AbstractCegarLoop]: Abstraction has 46 states and 54 transitions.
[2020-07-20 17:36:26,782 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-07-20 17:36:26,782 INFO  L276                IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions.
[2020-07-20 17:36:26,784 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 63
[2020-07-20 17:36:26,784 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:36:26,785 INFO  L422         BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 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]
[2020-07-20 17:36:26,999 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:36:27,000 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:36:27,000 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:36:27,001 INFO  L82        PathProgramCache]: Analyzing trace with hash -619650601, now seen corresponding path program 1 times
[2020-07-20 17:36:27,001 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:36:27,002 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121209463]
[2020-07-20 17:36:27,002 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:36:27,087 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 17:36:27,088 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:36:27,090 INFO  L263         TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 19 conjunts are in the unsatisfiable core
[2020-07-20 17:36:27,093 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:36:27,202 INFO  L134       CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked.
[2020-07-20 17:36:27,202 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 17:36:27,203 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121209463]
[2020-07-20 17:36:27,203 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 17:36:27,203 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9
[2020-07-20 17:36:27,203 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258556319]
[2020-07-20 17:36:27,204 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 9 states
[2020-07-20 17:36:27,204 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:36:27,204 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2020-07-20 17:36:27,205 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72
[2020-07-20 17:36:27,205 INFO  L87              Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 9 states.
[2020-07-20 17:36:27,290 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:36:27,290 INFO  L93              Difference]: Finished difference Result 74 states and 89 transitions.
[2020-07-20 17:36:27,290 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2020-07-20 17:36:27,290 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states. Word has length 62
[2020-07-20 17:36:27,291 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:36:27,293 INFO  L225             Difference]: With dead ends: 74
[2020-07-20 17:36:27,293 INFO  L226             Difference]: Without dead ends: 70
[2020-07-20 17:36:27,294 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72
[2020-07-20 17:36:27,294 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 70 states.
[2020-07-20 17:36:27,306 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 56.
[2020-07-20 17:36:27,306 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 56 states.
[2020-07-20 17:36:27,308 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions.
[2020-07-20 17:36:27,308 INFO  L78                 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 62
[2020-07-20 17:36:27,308 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:36:27,308 INFO  L479      AbstractCegarLoop]: Abstraction has 56 states and 70 transitions.
[2020-07-20 17:36:27,309 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 9 states.
[2020-07-20 17:36:27,309 INFO  L276                IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions.
[2020-07-20 17:36:27,310 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 66
[2020-07-20 17:36:27,311 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:36:27,311 INFO  L422         BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 2, 2, 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]
[2020-07-20 17:36:27,525 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:36:27,527 INFO  L427      AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:36:27,527 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:36:27,527 INFO  L82        PathProgramCache]: Analyzing trace with hash 1679269433, now seen corresponding path program 1 times
[2020-07-20 17:36:27,528 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:36:27,528 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940828492]
[2020-07-20 17:36:27,529 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:36:27,620 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 17:36:27,620 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:36:27,623 INFO  L263         TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjunts are in the unsatisfiable core
[2020-07-20 17:36:27,626 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:36:27,731 INFO  L134       CoverageAnalysis]: Checked inductivity of 104 backedges. 66 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked.
[2020-07-20 17:36:27,732 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 17:36:27,938 INFO  L134       CoverageAnalysis]: Checked inductivity of 104 backedges. 66 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked.
[2020-07-20 17:36:27,940 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940828492]
[2020-07-20 17:36:27,940 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 17:36:27,940 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13
[2020-07-20 17:36:27,941 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101232540]
[2020-07-20 17:36:27,943 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-07-20 17:36:27,944 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:36:27,944 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-07-20 17:36:27,945 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156
[2020-07-20 17:36:27,945 INFO  L87              Difference]: Start difference. First operand 56 states and 70 transitions. Second operand 13 states.
[2020-07-20 17:36:28,221 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:36:28,222 INFO  L93              Difference]: Finished difference Result 139 states and 179 transitions.
[2020-07-20 17:36:28,222 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. 
[2020-07-20 17:36:28,222 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 65
[2020-07-20 17:36:28,223 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:36:28,224 INFO  L225             Difference]: With dead ends: 139
[2020-07-20 17:36:28,224 INFO  L226             Difference]: Without dead ends: 78
[2020-07-20 17:36:28,226 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 112 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2020-07-20 17:36:28,227 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 78 states.
[2020-07-20 17:36:28,239 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77.
[2020-07-20 17:36:28,240 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 77 states.
[2020-07-20 17:36:28,241 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 97 transitions.
[2020-07-20 17:36:28,241 INFO  L78                 Accepts]: Start accepts. Automaton has 77 states and 97 transitions. Word has length 65
[2020-07-20 17:36:28,242 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:36:28,242 INFO  L479      AbstractCegarLoop]: Abstraction has 77 states and 97 transitions.
[2020-07-20 17:36:28,242 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-07-20 17:36:28,242 INFO  L276                IsEmpty]: Start isEmpty. Operand 77 states and 97 transitions.
[2020-07-20 17:36:28,244 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 68
[2020-07-20 17:36:28,244 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:36:28,244 INFO  L422         BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 3, 3, 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]
[2020-07-20 17:36:28,460 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:36:28,461 INFO  L427      AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:36:28,461 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:36:28,461 INFO  L82        PathProgramCache]: Analyzing trace with hash -2040052581, now seen corresponding path program 2 times
[2020-07-20 17:36:28,462 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:36:28,462 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806657702]
[2020-07-20 17:36:28,463 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:36:28,553 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 17:36:28,554 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:36:28,556 INFO  L263         TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core
[2020-07-20 17:36:28,559 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:36:28,638 INFO  L134       CoverageAnalysis]: Checked inductivity of 109 backedges. 47 proven. 10 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked.
[2020-07-20 17:36:28,638 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 17:36:28,826 INFO  L134       CoverageAnalysis]: Checked inductivity of 109 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked.
[2020-07-20 17:36:28,826 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806657702]
[2020-07-20 17:36:28,826 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 17:36:28,827 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13
[2020-07-20 17:36:28,829 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652514172]
[2020-07-20 17:36:28,830 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-07-20 17:36:28,830 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:36:28,830 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-07-20 17:36:28,830 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156
[2020-07-20 17:36:28,830 INFO  L87              Difference]: Start difference. First operand 77 states and 97 transitions. Second operand 13 states.
[2020-07-20 17:36:29,084 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:36:29,085 INFO  L93              Difference]: Finished difference Result 129 states and 173 transitions.
[2020-07-20 17:36:29,086 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. 
[2020-07-20 17:36:29,086 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 67
[2020-07-20 17:36:29,086 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:36:29,087 INFO  L225             Difference]: With dead ends: 129
[2020-07-20 17:36:29,088 INFO  L226             Difference]: Without dead ends: 72
[2020-07-20 17:36:29,089 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 116 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272
[2020-07-20 17:36:29,090 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 72 states.
[2020-07-20 17:36:29,102 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56.
[2020-07-20 17:36:29,102 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 56 states.
[2020-07-20 17:36:29,103 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions.
[2020-07-20 17:36:29,104 INFO  L78                 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 67
[2020-07-20 17:36:29,104 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:36:29,104 INFO  L479      AbstractCegarLoop]: Abstraction has 56 states and 68 transitions.
[2020-07-20 17:36:29,104 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-07-20 17:36:29,104 INFO  L276                IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions.
[2020-07-20 17:36:29,106 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 74
[2020-07-20 17:36:29,106 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:36:29,107 INFO  L422         BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 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]
[2020-07-20 17:36:29,320 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:36:29,321 INFO  L427      AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:36:29,322 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:36:29,322 INFO  L82        PathProgramCache]: Analyzing trace with hash -737365673, now seen corresponding path program 1 times
[2020-07-20 17:36:29,322 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:36:29,323 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087394270]
[2020-07-20 17:36:29,323 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:36:29,444 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 17:36:29,444 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:36:29,448 INFO  L263         TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 7 conjunts are in the unsatisfiable core
[2020-07-20 17:36:29,451 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:36:29,523 INFO  L134       CoverageAnalysis]: Checked inductivity of 160 backedges. 80 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked.
[2020-07-20 17:36:29,524 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 17:36:29,652 INFO  L134       CoverageAnalysis]: Checked inductivity of 160 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked.
[2020-07-20 17:36:29,653 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087394270]
[2020-07-20 17:36:29,653 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 17:36:29,653 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10
[2020-07-20 17:36:29,654 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30231259]
[2020-07-20 17:36:29,654 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 10 states
[2020-07-20 17:36:29,654 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:36:29,655 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2020-07-20 17:36:29,655 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90
[2020-07-20 17:36:29,655 INFO  L87              Difference]: Start difference. First operand 56 states and 68 transitions. Second operand 10 states.
[2020-07-20 17:36:29,816 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:36:29,816 INFO  L93              Difference]: Finished difference Result 86 states and 103 transitions.
[2020-07-20 17:36:29,817 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2020-07-20 17:36:29,817 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states. Word has length 73
[2020-07-20 17:36:29,818 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:36:29,819 INFO  L225             Difference]: With dead ends: 86
[2020-07-20 17:36:29,819 INFO  L226             Difference]: Without dead ends: 62
[2020-07-20 17:36:29,821 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 133 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132
[2020-07-20 17:36:29,821 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 62 states.
[2020-07-20 17:36:29,834 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60.
[2020-07-20 17:36:29,835 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 60 states.
[2020-07-20 17:36:29,838 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions.
[2020-07-20 17:36:29,838 INFO  L78                 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 73
[2020-07-20 17:36:29,838 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:36:29,839 INFO  L479      AbstractCegarLoop]: Abstraction has 60 states and 72 transitions.
[2020-07-20 17:36:29,839 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 10 states.
[2020-07-20 17:36:29,839 INFO  L276                IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions.
[2020-07-20 17:36:29,841 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 76
[2020-07-20 17:36:29,841 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:36:29,842 INFO  L422         BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 2, 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]
[2020-07-20 17:36:30,055 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:36:30,056 INFO  L427      AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:36:30,056 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:36:30,056 INFO  L82        PathProgramCache]: Analyzing trace with hash 132738585, now seen corresponding path program 2 times
[2020-07-20 17:36:30,056 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:36:30,057 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653977097]
[2020-07-20 17:36:30,057 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:36:30,339 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 17:36:30,340 INFO  L229   tOrderPrioritization]: Conjunction of SSA is sat
[2020-07-20 17:36:30,340 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-20 17:36:30,420 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-07-20 17:36:30,420 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-20 17:36:30,483 INFO  L174   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-07-20 17:36:30,484 INFO  L520         BasicCegarLoop]: Counterexample might be feasible
[2020-07-20 17:36:30,698 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:36:30,787 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:36:30 BoogieIcfgContainer
[2020-07-20 17:36:30,787 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-20 17:36:30,790 INFO  L168              Benchmark]: Toolchain (without parser) took 8460.28 ms. Allocated memory was 137.4 MB in the beginning and 273.2 MB in the end (delta: 135.8 MB). Free memory was 101.9 MB in the beginning and 172.5 MB in the end (delta: -70.6 MB). Peak memory consumption was 65.2 MB. Max. memory is 7.1 GB.
[2020-07-20 17:36:30,791 INFO  L168              Benchmark]: CDTParser took 0.42 ms. Allocated memory is still 137.4 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB.
[2020-07-20 17:36:30,791 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 320.55 ms. Allocated memory is still 137.4 MB. Free memory was 101.7 MB in the beginning and 91.1 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB.
[2020-07-20 17:36:30,792 INFO  L168              Benchmark]: Boogie Preprocessor took 207.45 ms. Allocated memory was 137.4 MB in the beginning and 203.9 MB in the end (delta: 66.6 MB). Free memory was 91.1 MB in the beginning and 181.4 MB in the end (delta: -90.3 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB.
[2020-07-20 17:36:30,793 INFO  L168              Benchmark]: RCFGBuilder took 483.85 ms. Allocated memory is still 203.9 MB. Free memory was 181.4 MB in the beginning and 162.7 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB.
[2020-07-20 17:36:30,794 INFO  L168              Benchmark]: TraceAbstraction took 7442.10 ms. Allocated memory was 203.9 MB in the beginning and 273.2 MB in the end (delta: 69.2 MB). Free memory was 162.0 MB in the beginning and 172.5 MB in the end (delta: -10.5 MB). Peak memory consumption was 58.7 MB. Max. memory is 7.1 GB.
[2020-07-20 17:36:30,797 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.42 ms. Allocated memory is still 137.4 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 320.55 ms. Allocated memory is still 137.4 MB. Free memory was 101.7 MB in the beginning and 91.1 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 207.45 ms. Allocated memory was 137.4 MB in the beginning and 203.9 MB in the end (delta: 66.6 MB). Free memory was 91.1 MB in the beginning and 181.4 MB in the end (delta: -90.3 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 483.85 ms. Allocated memory is still 203.9 MB. Free memory was 181.4 MB in the beginning and 162.7 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 7442.10 ms. Allocated memory was 203.9 MB in the beginning and 273.2 MB in the end (delta: 69.2 MB). Free memory was 162.0 MB in the beginning and 172.5 MB in the end (delta: -10.5 MB). Peak memory consumption was 58.7 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - CounterExampleResult [Line: 53]: a call of __VERIFIER_error() is reachable
    a call of __VERIFIER_error() is reachable
We found a FailurePath: 
[L4]               int N;
       VAL         [\old(N)=5, N=0]
[L32]              N = __VERIFIER_nondet_int()
[L33]  COND TRUE   N > 1
[L34]              int x[N];
       VAL         [\old(N)=0, N=3, x={2:0}]
[L35]  CALL        init_nondet(x)
       VAL         [\old(N)=0, N=3, x={2:0}]
[L6]               int i;
[L7]               i = 0
       VAL         [\old(N)=0, i=0, N=3, x={2:0}, x={2:0}]
[L7]   COND TRUE   i < N
[L8]               x[i] = __VERIFIER_nondet_int()
[L7]               i++
       VAL         [\old(N)=0, i=1, N=3, x={2:0}, x={2:0}]
[L7]   COND TRUE   i < N
[L8]               x[i] = __VERIFIER_nondet_int()
[L7]               i++
       VAL         [\old(N)=0, i=2, N=3, x={2:0}, x={2:0}]
[L7]   COND TRUE   i < N
[L8]               x[i] = __VERIFIER_nondet_int()
[L7]               i++
       VAL         [\old(N)=0, i=3, N=3, x={2:0}, x={2:0}]
[L7]   COND FALSE  !(i < N)
       VAL         [\old(N)=0, i=3, N=3, x={2:0}, x={2:0}]
[L35]  RET         init_nondet(x)
       VAL         [\old(N)=0, N=3, x={2:0}]
[L36]              int temp;
[L37]              int ret;
[L38]              int ret2;
[L39]              int ret5;
       VAL         [\old(N)=0, N=3, x={2:0}]
[L41]  CALL, EXPR  rangesum(x)
       VAL         [\old(N)=0, N=3, x={2:0}]
[L14]              int i;
[L15]              long long ret;
[L16]              ret = 0
[L17]              int cnt = 0;
[L18]              i = 0
       VAL         [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}]
[L18]  COND TRUE   i < N
       VAL         [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}]
[L19]  COND FALSE  !(i > N/2)
       VAL         [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}]
[L18]              i++
       VAL         [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}]
[L18]  COND TRUE   i < N
       VAL         [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}]
[L19]  COND FALSE  !(i > N/2)
       VAL         [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}]
[L18]              i++
       VAL         [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}]
[L18]  COND TRUE   i < N
       VAL         [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}]
[L19]  COND TRUE   i > N/2
[L20]  EXPR        x[i]
[L20]              ret = ret + x[i]
[L21]              cnt = cnt + 1
       VAL         [\old(N)=0, cnt=1, i=2, N=3, ret=1, x={2:0}, x={2:0}]
[L18]              i++
       VAL         [\old(N)=0, cnt=1, i=3, N=3, ret=1, x={2:0}, x={2:0}]
[L18]  COND FALSE  !(i < N)
       VAL         [\old(N)=0, cnt=1, i=3, N=3, ret=1, x={2:0}, x={2:0}]
[L24]  COND TRUE   cnt !=0
[L25]              return ret / cnt;
       VAL         [\old(N)=0, \result=1, cnt=1, i=3, N=3, ret=1, x={2:0}, x={2:0}]
[L41]  RET, EXPR   rangesum(x)
       VAL         [\old(N)=0, N=3, rangesum(x)=1, x={2:0}]
[L41]              ret = rangesum(x)
[L43]  EXPR        x[0]
[L43]              temp=x[0]
[L43]  EXPR        x[1]
[L43]              x[0] = x[1]
[L43]              x[1] = temp
       VAL         [\old(N)=0, N=3, ret=1, temp=2, x={2:0}]
[L44]  CALL, EXPR  rangesum(x)
       VAL         [\old(N)=0, N=3, x={2:0}]
[L14]              int i;
[L15]              long long ret;
[L16]              ret = 0
[L17]              int cnt = 0;
[L18]              i = 0
       VAL         [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}]
[L18]  COND TRUE   i < N
       VAL         [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}]
[L19]  COND FALSE  !(i > N/2)
       VAL         [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}]
[L18]              i++
       VAL         [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}]
[L18]  COND TRUE   i < N
       VAL         [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}]
[L19]  COND FALSE  !(i > N/2)
       VAL         [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}]
[L18]              i++
       VAL         [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}]
[L18]  COND TRUE   i < N
       VAL         [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}]
[L19]  COND TRUE   i > N/2
[L20]  EXPR        x[i]
[L20]              ret = ret + x[i]
[L21]              cnt = cnt + 1
       VAL         [\old(N)=0, cnt=1, i=2, N=3, ret=1, x={2:0}, x={2:0}]
[L18]              i++
       VAL         [\old(N)=0, cnt=1, i=3, N=3, ret=1, x={2:0}, x={2:0}]
[L18]  COND FALSE  !(i < N)
       VAL         [\old(N)=0, cnt=1, i=3, N=3, ret=1, x={2:0}, x={2:0}]
[L24]  COND TRUE   cnt !=0
[L25]              return ret / cnt;
       VAL         [\old(N)=0, \result=1, cnt=1, i=3, N=3, ret=1, x={2:0}, x={2:0}]
[L44]  RET, EXPR   rangesum(x)
       VAL         [\old(N)=0, N=3, rangesum(x)=1, ret=1, temp=2, x={2:0}]
[L44]              ret2 = rangesum(x)
[L45]  EXPR        x[0]
[L45]              temp=x[0]
[L46]              int i =0 ;
       VAL         [\old(N)=0, i=0, N=3, ret=1, ret2=1, temp=3, x={2:0}]
[L46]  COND TRUE   i<N-1
[L47]  EXPR        x[i+1]
[L47]              x[i] = x[i+1]
[L46]              i++
       VAL         [\old(N)=0, i=1, N=3, ret=1, ret2=1, temp=3, x={2:0}]
[L46]  COND TRUE   i<N-1
[L47]  EXPR        x[i+1]
[L47]              x[i] = x[i+1]
[L46]              i++
       VAL         [\old(N)=0, i=2, N=3, ret=1, ret2=1, temp=3, x={2:0}]
[L46]  COND FALSE  !(i<N-1)
       VAL         [\old(N)=0, i=2, N=3, ret=1, ret2=1, temp=3, x={2:0}]
[L49]              x[N-1] = temp
       VAL         [\old(N)=0, i=2, N=3, ret=1, ret2=1, temp=3, x={2:0}]
[L50]  CALL, EXPR  rangesum(x)
       VAL         [\old(N)=0, N=3, x={2:0}]
[L14]              int i;
[L15]              long long ret;
[L16]              ret = 0
[L17]              int cnt = 0;
[L18]              i = 0
       VAL         [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}]
[L18]  COND TRUE   i < N
       VAL         [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}]
[L19]  COND FALSE  !(i > N/2)
       VAL         [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}]
[L18]              i++
       VAL         [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}]
[L18]  COND TRUE   i < N
       VAL         [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}]
[L19]  COND FALSE  !(i > N/2)
       VAL         [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}]
[L18]              i++
       VAL         [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}]
[L18]  COND TRUE   i < N
       VAL         [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}]
[L19]  COND TRUE   i > N/2
[L20]  EXPR        x[i]
[L20]              ret = ret + x[i]
[L21]              cnt = cnt + 1
       VAL         [\old(N)=0, cnt=1, i=2, N=3, ret=3, x={2:0}, x={2:0}]
[L18]              i++
       VAL         [\old(N)=0, cnt=1, i=3, N=3, ret=3, x={2:0}, x={2:0}]
[L18]  COND FALSE  !(i < N)
       VAL         [\old(N)=0, cnt=1, i=3, N=3, ret=3, x={2:0}, x={2:0}]
[L24]  COND TRUE   cnt !=0
[L25]              return ret / cnt;
       VAL         [\old(N)=0, \result=3, cnt=1, i=3, N=3, ret=3, x={2:0}, x={2:0}]
[L50]  RET, EXPR   rangesum(x)
       VAL         [\old(N)=0, i=2, N=3, rangesum(x)=3, ret=1, ret2=1, temp=3, x={2:0}]
[L50]              ret5 = rangesum(x)
[L52]  COND TRUE   ret != ret2 || ret !=ret5
       VAL         [\old(N)=0, i=2, N=3, ret=1, ret2=1, ret5=3, temp=3, x={2:0}]
[L53]              __VERIFIER_error()
       VAL         [\old(N)=0, i=2, N=3, ret=1, ret2=1, ret5=3, temp=3, x={2:0}]

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.2s, OverallIterations: 11, TraceHistogramMax: 9, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 329 SDtfs, 280 SDslu, 591 SDs, 0 SdLazy, 640 SolverSat, 68 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 832 GetRequests, 745 SyntacticMatches, 22 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 40 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 611 NumberOfCodeBlocks, 432 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 817 ConstructedInterpolants, 0 QuantifiedInterpolants, 98205 SizeOfPredicates, 22 NumberOfNonLiveVariables, 1424 ConjunctsInSsa, 62 ConjunctsInUnsatCore, 15 InterpolantComputations, 5 PerfectInterpolantSequences, 957/1066 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...