/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 BIGGEST_EQUIVALENCE_CLASS --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/bitvector-loops/diamond_2-1.c


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


This is Ultimate 0.1.25-d623d84
[2020-07-21 00:31:28,074 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-07-21 00:31:28,077 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-21 00:31:28,096 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-21 00:31:28,096 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-21 00:31:28,099 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-21 00:31:28,100 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-21 00:31:28,114 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
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[2020-07-21 00:31:28,117 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-07-21 00:31:28,118 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-07-21 00:31:28,120 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-21 00:31:28,120 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-21 00:31:28,124 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-21 00:31:28,126 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-21 00:31:28,128 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-21 00:31:28,130 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-21 00:31:28,132 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-21 00:31:28,134 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-21 00:31:28,140 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-21 00:31:28,143 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-21 00:31:28,144 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-21 00:31:28,146 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-07-21 00:31:28,147 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-21 00:31:28,150 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2020-07-21 00:31:28,151 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
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[2020-07-21 00:31:28,153 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
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[2020-07-21 00:31:28,154 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
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[2020-07-21 00:31:28,162 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-07-21 00:31:28,164 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-07-21 00:31:28,165 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
[2020-07-21 00:31:28,188 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-07-21 00:31:28,188 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-21 00:31:28,190 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-21 00:31:28,190 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-07-21 00:31:28,190 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-07-21 00:31:28,191 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-21 00:31:28,191 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-07-21 00:31:28,191 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-07-21 00:31:28,191 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-07-21 00:31:28,191 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-07-21 00:31:28,193 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-07-21 00:31:28,193 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-21 00:31:28,193 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-07-21 00:31:28,193 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-07-21 00:31:28,194 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-07-21 00:31:28,194 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-07-21 00:31:28,194 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-07-21 00:31:28,194 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-21 00:31:28,194 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-07-21 00:31:28,195 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-07-21 00:31:28,195 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-07-21 00:31:28,195 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-21 00:31:28,195 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-21 00:31:28,195 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-07-21 00:31:28,196 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-21 00:31:28,196 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-07-21 00:31:28,196 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 00:31:28,196 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-21 00:31:28,196 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-07-21 00:31:28,197 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 -> BIGGEST_EQUIVALENCE_CLASS
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
[2020-07-21 00:31:28,481 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-21 00:31:28,494 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-21 00:31:28,498 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-21 00:31:28,500 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-07-21 00:31:28,500 INFO  L275        PluginConnector]: CDTParser initialized
[2020-07-21 00:31:28,501 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector-loops/diamond_2-1.c
[2020-07-21 00:31:28,563 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be17e6519/c3614e00afe3458c91808f3d51d7ae63/FLAG617570aab
[2020-07-21 00:31:28,993 INFO  L306              CDTParser]: Found 1 translation units.
[2020-07-21 00:31:28,994 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector-loops/diamond_2-1.c
[2020-07-21 00:31:29,002 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be17e6519/c3614e00afe3458c91808f3d51d7ae63/FLAG617570aab
[2020-07-21 00:31:29,370 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be17e6519/c3614e00afe3458c91808f3d51d7ae63
[2020-07-21 00:31:29,381 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-21 00:31:29,384 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-21 00:31:29,385 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-21 00:31:29,386 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-21 00:31:29,390 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-21 00:31:29,391 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:31:29" (1/1) ...
[2020-07-21 00:31:29,394 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b3607cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:29, skipping insertion in model container
[2020-07-21 00:31:29,395 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:31:29" (1/1) ...
[2020-07-21 00:31:29,405 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-07-21 00:31:29,423 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-07-21 00:31:29,612 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-21 00:31:29,616 INFO  L203         MainTranslator]: Completed pre-run
[2020-07-21 00:31:29,637 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-21 00:31:29,651 INFO  L208         MainTranslator]: Completed translation
[2020-07-21 00:31:29,651 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:29 WrapperNode
[2020-07-21 00:31:29,651 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-21 00:31:29,652 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-21 00:31:29,652 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-21 00:31:29,652 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-07-21 00:31:29,663 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:29" (1/1) ...
[2020-07-21 00:31:29,663 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:29" (1/1) ...
[2020-07-21 00:31:29,750 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:29" (1/1) ...
[2020-07-21 00:31:29,750 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:29" (1/1) ...
[2020-07-21 00:31:29,755 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:29" (1/1) ...
[2020-07-21 00:31:29,761 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:29" (1/1) ...
[2020-07-21 00:31:29,762 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:29" (1/1) ...
[2020-07-21 00:31:29,764 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-21 00:31:29,764 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-21 00:31:29,765 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-07-21 00:31:29,765 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-07-21 00:31:29,766 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:29" (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
[2020-07-21 00:31:29,828 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-21 00:31:29,828 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-21 00:31:29,828 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-07-21 00:31:29,829 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-07-21 00:31:29,829 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-21 00:31:29,829 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint
[2020-07-21 00:31:29,829 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-07-21 00:31:29,829 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-07-21 00:31:29,829 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-21 00:31:29,830 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-21 00:31:30,102 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-21 00:31:30,102 INFO  L295             CfgBuilder]: Removed 1 assume(true) statements.
[2020-07-21 00:31:30,106 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:31:30 BoogieIcfgContainer
[2020-07-21 00:31:30,107 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-21 00:31:30,109 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-21 00:31:30,109 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-07-21 00:31:30,112 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-07-21 00:31:30,113 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:31:29" (1/3) ...
[2020-07-21 00:31:30,114 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13ef496c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:31:30, skipping insertion in model container
[2020-07-21 00:31:30,114 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:29" (2/3) ...
[2020-07-21 00:31:30,115 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13ef496c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:31:30, skipping insertion in model container
[2020-07-21 00:31:30,115 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:31:30" (3/3) ...
[2020-07-21 00:31:30,117 INFO  L109   eAbstractionObserver]: Analyzing ICFG diamond_2-1.c
[2020-07-21 00:31:30,128 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-21 00:31:30,140 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-21 00:31:30,156 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-21 00:31:30,191 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-07-21 00:31:30,191 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-07-21 00:31:30,192 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-21 00:31:30,192 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-21 00:31:30,192 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-21 00:31:30,193 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-07-21 00:31:30,193 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-21 00:31:30,193 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-21 00:31:30,222 INFO  L276                IsEmpty]: Start isEmpty. Operand 27 states.
[2020-07-21 00:31:30,228 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2020-07-21 00:31:30,228 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-21 00:31:30,230 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-21 00:31:30,230 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 00:31:30,237 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 00:31:30,238 INFO  L82        PathProgramCache]: Analyzing trace with hash 1906239810, now seen corresponding path program 1 times
[2020-07-21 00:31:30,249 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 00:31:30,250 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833196808]
[2020-07-21 00:31:30,251 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
[2020-07-21 00:31:30,316 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-21 00:31:30,317 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 00:31:30,319 INFO  L263         TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 1 conjunts are in the unsatisfiable core
[2020-07-21 00:31:30,327 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 00:31:30,365 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-21 00:31:30,366 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-21 00:31:30,367 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833196808]
[2020-07-21 00:31:30,368 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-21 00:31:30,368 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2020-07-21 00:31:30,369 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773240856]
[2020-07-21 00:31:30,374 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 2 states
[2020-07-21 00:31:30,375 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 00:31:30,388 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2020-07-21 00:31:30,389 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-07-21 00:31:30,392 INFO  L87              Difference]: Start difference. First operand 27 states. Second operand 2 states.
[2020-07-21 00:31:30,417 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 00:31:30,418 INFO  L93              Difference]: Finished difference Result 38 states and 51 transitions.
[2020-07-21 00:31:30,418 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2020-07-21 00:31:30,419 INFO  L78                 Accepts]: Start accepts. Automaton has 2 states. Word has length 10
[2020-07-21 00:31:30,420 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 00:31:30,428 INFO  L225             Difference]: With dead ends: 38
[2020-07-21 00:31:30,429 INFO  L226             Difference]: Without dead ends: 21
[2020-07-21 00:31:30,432 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-07-21 00:31:30,451 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 21 states.
[2020-07-21 00:31:30,468 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21.
[2020-07-21 00:31:30,469 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 21 states.
[2020-07-21 00:31:30,470 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 31 transitions.
[2020-07-21 00:31:30,472 INFO  L78                 Accepts]: Start accepts. Automaton has 21 states and 31 transitions. Word has length 10
[2020-07-21 00:31:30,472 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-21 00:31:30,472 INFO  L479      AbstractCegarLoop]: Abstraction has 21 states and 31 transitions.
[2020-07-21 00:31:30,472 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 2 states.
[2020-07-21 00:31:30,472 INFO  L276                IsEmpty]: Start isEmpty. Operand 21 states and 31 transitions.
[2020-07-21 00:31:30,473 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2020-07-21 00:31:30,473 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-21 00:31:30,473 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-21 00:31:30,686 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 00:31:30,686 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 00:31:30,687 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 00:31:30,688 INFO  L82        PathProgramCache]: Analyzing trace with hash 1847134466, now seen corresponding path program 1 times
[2020-07-21 00:31:30,688 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 00:31:30,689 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [267664854]
[2020-07-21 00:31:30,690 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
[2020-07-21 00:31:30,714 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-21 00:31:30,715 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 00:31:30,722 INFO  L263         TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-21 00:31:30,724 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 00:31:30,755 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-21 00:31:30,756 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-21 00:31:30,756 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [267664854]
[2020-07-21 00:31:30,758 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-21 00:31:30,759 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-21 00:31:30,759 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618036658]
[2020-07-21 00:31:30,761 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-21 00:31:30,761 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 00:31:30,763 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-21 00:31:30,764 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 00:31:30,764 INFO  L87              Difference]: Start difference. First operand 21 states and 31 transitions. Second operand 3 states.
[2020-07-21 00:31:30,865 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 00:31:30,865 INFO  L93              Difference]: Finished difference Result 28 states and 39 transitions.
[2020-07-21 00:31:30,866 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-21 00:31:30,866 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 10
[2020-07-21 00:31:30,867 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 00:31:30,869 INFO  L225             Difference]: With dead ends: 28
[2020-07-21 00:31:30,870 INFO  L226             Difference]: Without dead ends: 23
[2020-07-21 00:31:30,871 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 00:31:30,872 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23 states.
[2020-07-21 00:31:30,877 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22.
[2020-07-21 00:31:30,877 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 22 states.
[2020-07-21 00:31:30,879 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions.
[2020-07-21 00:31:30,879 INFO  L78                 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 10
[2020-07-21 00:31:30,879 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-21 00:31:30,879 INFO  L479      AbstractCegarLoop]: Abstraction has 22 states and 32 transitions.
[2020-07-21 00:31:30,880 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-21 00:31:30,880 INFO  L276                IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions.
[2020-07-21 00:31:30,881 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-07-21 00:31:30,881 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-21 00:31:30,881 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-21 00:31:31,094 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 00:31:31,095 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 00:31:31,096 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 00:31:31,097 INFO  L82        PathProgramCache]: Analyzing trace with hash -129940435, now seen corresponding path program 1 times
[2020-07-21 00:31:31,098 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 00:31:31,098 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991417590]
[2020-07-21 00:31:31,099 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
[2020-07-21 00:31:31,152 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-21 00:31:31,152 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 00:31:31,153 INFO  L263         TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 2 conjunts are in the unsatisfiable core
[2020-07-21 00:31:31,156 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 00:31:31,198 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts
[2020-07-21 00:31:31,201 INFO  L501       QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts
[2020-07-21 00:31:31,212 INFO  L501       QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts
[2020-07-21 00:31:31,235 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-21 00:31:31,236 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-21 00:31:31,236 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991417590]
[2020-07-21 00:31:31,236 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-21 00:31:31,237 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-21 00:31:31,237 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635870022]
[2020-07-21 00:31:31,238 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-21 00:31:31,239 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 00:31:31,239 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-21 00:31:31,239 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 00:31:31,240 INFO  L87              Difference]: Start difference. First operand 22 states and 32 transitions. Second operand 3 states.
[2020-07-21 00:31:31,341 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 00:31:31,341 INFO  L93              Difference]: Finished difference Result 50 states and 81 transitions.
[2020-07-21 00:31:31,342 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-21 00:31:31,342 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 21
[2020-07-21 00:31:31,342 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 00:31:31,344 INFO  L225             Difference]: With dead ends: 50
[2020-07-21 00:31:31,344 INFO  L226             Difference]: Without dead ends: 34
[2020-07-21 00:31:31,345 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 00:31:31,346 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 34 states.
[2020-07-21 00:31:31,351 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33.
[2020-07-21 00:31:31,352 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 33 states.
[2020-07-21 00:31:31,353 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions.
[2020-07-21 00:31:31,353 INFO  L78                 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 21
[2020-07-21 00:31:31,354 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-21 00:31:31,354 INFO  L479      AbstractCegarLoop]: Abstraction has 33 states and 44 transitions.
[2020-07-21 00:31:31,354 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-21 00:31:31,354 INFO  L276                IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions.
[2020-07-21 00:31:31,355 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-07-21 00:31:31,355 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-21 00:31:31,355 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-21 00:31:31,570 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 00:31:31,571 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 00:31:31,572 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 00:31:31,572 INFO  L82        PathProgramCache]: Analyzing trace with hash 263086575, now seen corresponding path program 1 times
[2020-07-21 00:31:31,572 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 00:31:31,573 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275187102]
[2020-07-21 00:31:31,573 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
[2020-07-21 00:31:31,635 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-21 00:31:31,636 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 00:31:31,639 INFO  L263         TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 23 conjunts are in the unsatisfiable core
[2020-07-21 00:31:31,642 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 00:31:31,839 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-21 00:31:31,840 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-21 00:31:36,489 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-21 00:31:36,490 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275187102]
[2020-07-21 00:31:36,490 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-21 00:31:36,490 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24
[2020-07-21 00:31:36,491 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415088175]
[2020-07-21 00:31:36,491 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 24 states
[2020-07-21 00:31:36,492 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 00:31:36,492 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants.
[2020-07-21 00:31:36,493 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=384, Unknown=2, NotChecked=0, Total=552
[2020-07-21 00:31:36,493 INFO  L87              Difference]: Start difference. First operand 33 states and 44 transitions. Second operand 24 states.
[2020-07-21 00:31:41,364 WARN  L193               SmtUtils]: Spent 4.53 s on a formula simplification. DAG size of input: 56 DAG size of output: 11
[2020-07-21 00:31:43,438 WARN  L193               SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 11
[2020-07-21 00:31:45,974 WARN  L193               SmtUtils]: Spent 2.27 s on a formula simplification. DAG size of input: 53 DAG size of output: 13
[2020-07-21 00:31:56,442 WARN  L193               SmtUtils]: Spent 2.34 s on a formula simplification. DAG size of input: 48 DAG size of output: 13
[2020-07-21 00:32:13,539 WARN  L193               SmtUtils]: Spent 2.34 s on a formula simplification. DAG size of input: 38 DAG size of output: 13
[2020-07-21 00:32:20,946 WARN  L193               SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 13
[2020-07-21 00:32:38,575 WARN  L193               SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 13
[2020-07-21 00:32:58,806 WARN  L193               SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 46 DAG size of output: 11
[2020-07-21 00:33:10,143 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 00:33:10,143 INFO  L93              Difference]: Finished difference Result 118 states and 138 transitions.
[2020-07-21 00:33:10,144 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. 
[2020-07-21 00:33:10,144 INFO  L78                 Accepts]: Start accepts. Automaton has 24 states. Word has length 21
[2020-07-21 00:33:10,145 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 00:33:10,146 INFO  L225             Difference]: With dead ends: 118
[2020-07-21 00:33:10,146 INFO  L226             Difference]: Without dead ends: 113
[2020-07-21 00:33:10,148 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 50.3s TimeCoverageRelationStatistics Valid=612, Invalid=1104, Unknown=6, NotChecked=0, Total=1722
[2020-07-21 00:33:10,148 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 113 states.
[2020-07-21 00:33:10,156 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 56.
[2020-07-21 00:33:10,156 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 56 states.
[2020-07-21 00:33:10,157 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions.
[2020-07-21 00:33:10,158 INFO  L78                 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 21
[2020-07-21 00:33:10,158 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-21 00:33:10,158 INFO  L479      AbstractCegarLoop]: Abstraction has 56 states and 69 transitions.
[2020-07-21 00:33:10,158 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 24 states.
[2020-07-21 00:33:10,158 INFO  L276                IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions.
[2020-07-21 00:33:10,159 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-07-21 00:33:10,159 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-21 00:33:10,159 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-21 00:33:10,360 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 00:33:10,361 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 00:33:10,361 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 00:33:10,361 INFO  L82        PathProgramCache]: Analyzing trace with hash -402778255, now seen corresponding path program 1 times
[2020-07-21 00:33:10,362 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 00:33:10,362 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737275189]
[2020-07-21 00:33:10,363 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
[2020-07-21 00:33:10,393 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-21 00:33:10,393 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 00:33:10,395 INFO  L263         TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core
[2020-07-21 00:33:10,396 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 00:33:10,423 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-21 00:33:10,426 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts
[2020-07-21 00:33:10,439 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-21 00:33:10,439 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-21 00:33:10,439 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737275189]
[2020-07-21 00:33:10,440 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-21 00:33:10,440 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-21 00:33:10,440 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484912488]
[2020-07-21 00:33:10,440 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-21 00:33:10,441 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 00:33:10,441 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-21 00:33:10,441 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 00:33:10,441 INFO  L87              Difference]: Start difference. First operand 56 states and 69 transitions. Second operand 3 states.
[2020-07-21 00:33:10,510 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 00:33:10,510 INFO  L93              Difference]: Finished difference Result 83 states and 96 transitions.
[2020-07-21 00:33:10,511 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-21 00:33:10,511 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 21
[2020-07-21 00:33:10,511 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 00:33:10,512 INFO  L225             Difference]: With dead ends: 83
[2020-07-21 00:33:10,512 INFO  L226             Difference]: Without dead ends: 57
[2020-07-21 00:33:10,513 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 00:33:10,513 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 57 states.
[2020-07-21 00:33:10,518 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55.
[2020-07-21 00:33:10,519 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 55 states.
[2020-07-21 00:33:10,520 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions.
[2020-07-21 00:33:10,520 INFO  L78                 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 21
[2020-07-21 00:33:10,520 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-21 00:33:10,520 INFO  L479      AbstractCegarLoop]: Abstraction has 55 states and 57 transitions.
[2020-07-21 00:33:10,520 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-21 00:33:10,521 INFO  L276                IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions.
[2020-07-21 00:33:10,521 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-07-21 00:33:10,521 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-21 00:33:10,522 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-21 00:33:10,722 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 00:33:10,723 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 00:33:10,723 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 00:33:10,723 INFO  L82        PathProgramCache]: Analyzing trace with hash -345519953, now seen corresponding path program 1 times
[2020-07-21 00:33:10,724 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 00:33:10,724 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858245286]
[2020-07-21 00:33:10,724 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
[2020-07-21 00:33:10,755 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-21 00:33:10,755 INFO  L229   tOrderPrioritization]: Conjunction of SSA is sat
[2020-07-21 00:33:10,755 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-21 00:33:10,764 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-07-21 00:33:10,764 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-21 00:33:10,778 INFO  L174   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-07-21 00:33:10,779 INFO  L520         BasicCegarLoop]: Counterexample might be feasible
[2020-07-21 00:33:10,979 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 00:33:11,005 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 12:33:11 BoogieIcfgContainer
[2020-07-21 00:33:11,005 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-21 00:33:11,007 INFO  L168              Benchmark]: Toolchain (without parser) took 101624.27 ms. Allocated memory was 146.3 MB in the beginning and 244.3 MB in the end (delta: 98.0 MB). Free memory was 103.8 MB in the beginning and 142.1 MB in the end (delta: -38.3 MB). Peak memory consumption was 59.7 MB. Max. memory is 7.1 GB.
[2020-07-21 00:33:11,008 INFO  L168              Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 146.3 MB. Free memory was 122.5 MB in the beginning and 122.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
[2020-07-21 00:33:11,009 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 266.48 ms. Allocated memory is still 146.3 MB. Free memory was 103.4 MB in the beginning and 93.3 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB.
[2020-07-21 00:33:11,010 INFO  L168              Benchmark]: Boogie Preprocessor took 111.90 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 93.3 MB in the beginning and 181.5 MB in the end (delta: -88.2 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB.
[2020-07-21 00:33:11,010 INFO  L168              Benchmark]: RCFGBuilder took 342.56 ms. Allocated memory is still 203.4 MB. Free memory was 181.5 MB in the beginning and 165.3 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB.
[2020-07-21 00:33:11,011 INFO  L168              Benchmark]: TraceAbstraction took 100896.49 ms. Allocated memory was 203.4 MB in the beginning and 244.3 MB in the end (delta: 40.9 MB). Free memory was 165.3 MB in the beginning and 142.1 MB in the end (delta: 23.2 MB). Peak memory consumption was 64.1 MB. Max. memory is 7.1 GB.
[2020-07-21 00:33:11,016 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.22 ms. Allocated memory is still 146.3 MB. Free memory was 122.5 MB in the beginning and 122.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 266.48 ms. Allocated memory is still 146.3 MB. Free memory was 103.4 MB in the beginning and 93.3 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 111.90 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 93.3 MB in the beginning and 181.5 MB in the end (delta: -88.2 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 342.56 ms. Allocated memory is still 203.4 MB. Free memory was 181.5 MB in the beginning and 165.3 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 100896.49 ms. Allocated memory was 203.4 MB in the beginning and 244.3 MB in the end (delta: 40.9 MB). Free memory was 165.3 MB in the beginning and 142.1 MB in the end (delta: 23.2 MB). Peak memory consumption was 64.1 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable
    a call of __VERIFIER_error() is reachable
We found a FailurePath: 
[L12]              unsigned int x = 0;
[L13]              unsigned int y = __VERIFIER_nondet_uint();
[L15]  COND TRUE   x < 99
       VAL         [x=0, y=4294967295]
[L16]  COND FALSE  !(y % 2 == 0)
[L17]              x += 2
       VAL         [x=2, y=4294967295]
[L19]  COND FALSE  !(y % 2 == 0)
[L20]              x -= 2
       VAL         [x=0, y=4294967295]
[L22]  COND FALSE  !(y % 2 == 0)
[L23]              x += 2
       VAL         [x=2, y=4294967295]
[L25]  COND FALSE  !(y % 2 == 0)
[L26]              x -= 2
       VAL         [x=0, y=4294967295]
[L28]  COND FALSE  !(y % 2 == 0)
[L29]              x += 2
       VAL         [x=2, y=4294967295]
[L31]  COND FALSE  !(y % 2 == 0)
[L32]              x -= 4
       VAL         [x=4294967294, y=4294967295]
[L34]  COND FALSE  !(y % 2 == 0)
[L35]              x += 4
       VAL         [x=2, y=4294967295]
[L37]  COND FALSE  !(y % 2 == 0)
[L38]              x += 2
       VAL         [x=4, y=4294967295]
[L40]  COND FALSE  !(y % 2 == 0)
[L41]              x -= 4
       VAL         [x=0, y=4294967295]
[L43]  COND FALSE  !(y % 2 == 0)
[L44]              x -= 4
       VAL         [x=4294967292, y=4294967295]
[L15]  COND FALSE  !(x < 99)
       VAL         [x=4294967292, y=4294967295]
[L47]  CALL        __VERIFIER_assert((x % 2) == (y % 2))
       VAL         [\old(cond)=0]
[L5]   COND TRUE   !(cond)
       VAL         [\old(cond)=0, cond=0]
[L6]               __VERIFIER_error()
       VAL         [\old(cond)=0, cond=0]

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 100.7s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 94.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 120 SDtfs, 62 SDslu, 124 SDs, 0 SdLazy, 699 SolverSat, 426 SolverUnsat, 21 SolverUnknown, 0 SolverNotchecked, 46.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 123 GetRequests, 74 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 50.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 61 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 5.0s InterpolantComputationTime, 104 NumberOfCodeBlocks, 81 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 98 ConstructedInterpolants, 0 QuantifiedInterpolants, 4960 SizeOfPredicates, 4 NumberOfNonLiveVariables, 179 ConjunctsInSsa, 31 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 2/4 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...