/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_FUNCTIONS --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
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This is Ultimate 0.1.25-d623d84
[2020-07-20 13:06:44,207 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-07-20 13:06:44,210 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-20 13:06:44,227 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-20 13:06:44,228 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-20 13:06:44,230 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-20 13:06:44,231 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-20 13:06:44,237 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-07-20 13:06:44,238 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-07-20 13:06:44,239 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-07-20 13:06:44,240 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-07-20 13:06:44,241 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-20 13:06:44,241 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-20 13:06:44,242 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-20 13:06:44,247 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-20 13:06:44,248 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-20 13:06:44,249 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-20 13:06:44,249 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-20 13:06:44,251 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-20 13:06:44,253 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-20 13:06:44,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-20 13:06:44,255 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-20 13:06:44,256 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-07-20 13:06:44,257 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-20 13:06:44,259 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-20 13:06:44,260 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-20 13:06:44,260 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-20 13:06:44,261 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-20 13:06:44,261 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-07-20 13:06:44,262 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-07-20 13:06:44,262 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-07-20 13:06:44,263 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-07-20 13:06:44,264 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-07-20 13:06:44,264 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2020-07-20 13:06:44,265 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-20 13:06:44,266 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2020-07-20 13:06:44,266 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-07-20 13:06:44,267 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-07-20 13:06:44,267 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2020-07-20 13:06:44,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2020-07-20 13:06:44,268 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-07-20 13:06:44,269 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 13:06:44,283 INFO L113 SettingsManager]: Loading preferences was successful
[2020-07-20 13:06:44,283 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-20 13:06:44,284 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-20 13:06:44,285 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-07-20 13:06:44,285 INFO L138 SettingsManager]: * Use SBE=true
[2020-07-20 13:06:44,285 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-20 13:06:44,285 INFO L138 SettingsManager]: * sizeof long=4
[2020-07-20 13:06:44,285 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-07-20 13:06:44,286 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-07-20 13:06:44,286 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-07-20 13:06:44,286 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-07-20 13:06:44,286 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-20 13:06:44,286 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-07-20 13:06:44,287 INFO L138 SettingsManager]: * sizeof long double=12
[2020-07-20 13:06:44,287 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-07-20 13:06:44,287 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-07-20 13:06:44,287 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-07-20 13:06:44,287 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-20 13:06:44,288 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-07-20 13:06:44,288 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-07-20 13:06:44,288 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-07-20 13:06:44,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 13:06:44,289 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-20 13:06:44,289 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-07-20 13:06:44,289 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-20 13:06:44,289 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-07-20 13:06:44,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:06:44,289 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-20 13:06:44,290 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-07-20 13:06:44,290 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_FUNCTIONS
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 13:06:44,565 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-20 13:06:44,584 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-20 13:06:44,587 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-20 13:06:44,588 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-07-20 13:06:44,590 INFO L275 PluginConnector]: CDTParser initialized
[2020-07-20 13:06:44,591 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector-loops/diamond_2-1.c
[2020-07-20 13:06:44,661 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/430d73855/ff3efe3f639944dc9dc54cb88132522e/FLAG967e16062
[2020-07-20 13:06:45,096 INFO L306 CDTParser]: Found 1 translation units.
[2020-07-20 13:06:45,097 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector-loops/diamond_2-1.c
[2020-07-20 13:06:45,104 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/430d73855/ff3efe3f639944dc9dc54cb88132522e/FLAG967e16062
[2020-07-20 13:06:45,482 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/430d73855/ff3efe3f639944dc9dc54cb88132522e
[2020-07-20 13:06:45,490 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-20 13:06:45,492 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-20 13:06:45,493 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-20 13:06:45,493 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-20 13:06:45,497 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-20 13:06:45,498 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:06:45" (1/1) ...
[2020-07-20 13:06:45,500 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bd8c312 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:45, skipping insertion in model container
[2020-07-20 13:06:45,501 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:06:45" (1/1) ...
[2020-07-20 13:06:45,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-07-20 13:06:45,528 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-07-20 13:06:45,720 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-07-20 13:06:45,724 INFO L203 MainTranslator]: Completed pre-run
[2020-07-20 13:06:45,754 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-07-20 13:06:45,771 INFO L208 MainTranslator]: Completed translation
[2020-07-20 13:06:45,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:45 WrapperNode
[2020-07-20 13:06:45,771 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-20 13:06:45,772 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-20 13:06:45,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-20 13:06:45,772 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-07-20 13:06:45,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:45" (1/1) ...
[2020-07-20 13:06:45,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:45" (1/1) ...
[2020-07-20 13:06:45,789 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:45" (1/1) ...
[2020-07-20 13:06:45,789 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:45" (1/1) ...
[2020-07-20 13:06:45,794 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:45" (1/1) ...
[2020-07-20 13:06:45,800 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:45" (1/1) ...
[2020-07-20 13:06:45,801 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:45" (1/1) ...
[2020-07-20 13:06:45,890 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-20 13:06:45,892 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-20 13:06:45,892 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-07-20 13:06:45,892 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-07-20 13:06:45,893 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:45" (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 13:06:45,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-20 13:06:45,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-20 13:06:45,952 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-07-20 13:06:45,952 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-07-20 13:06:45,952 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-20 13:06:45,953 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint
[2020-07-20 13:06:45,953 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-07-20 13:06:45,953 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-07-20 13:06:45,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-20 13:06:45,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-20 13:06:46,200 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-20 13:06:46,200 INFO L295 CfgBuilder]: Removed 1 assume(true) statements.
[2020-07-20 13:06:46,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:06:46 BoogieIcfgContainer
[2020-07-20 13:06:46,204 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-20 13:06:46,205 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-20 13:06:46,205 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-07-20 13:06:46,208 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-07-20 13:06:46,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:06:45" (1/3) ...
[2020-07-20 13:06:46,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23daf0cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:06:46, skipping insertion in model container
[2020-07-20 13:06:46,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:45" (2/3) ...
[2020-07-20 13:06:46,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23daf0cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:06:46, skipping insertion in model container
[2020-07-20 13:06:46,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:06:46" (3/3) ...
[2020-07-20 13:06:46,212 INFO L109 eAbstractionObserver]: Analyzing ICFG diamond_2-1.c
[2020-07-20 13:06:46,222 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-20 13:06:46,230 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-20 13:06:46,243 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-20 13:06:46,266 INFO L375 AbstractCegarLoop]: Interprodecural is true
[2020-07-20 13:06:46,266 INFO L376 AbstractCegarLoop]: Hoare is true
[2020-07-20 13:06:46,267 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-20 13:06:46,267 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-20 13:06:46,267 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-20 13:06:46,267 INFO L380 AbstractCegarLoop]: Difference is false
[2020-07-20 13:06:46,267 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-20 13:06:46,267 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-20 13:06:46,285 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states.
[2020-07-20 13:06:46,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2020-07-20 13:06:46,291 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 13:06:46,292 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 13:06:46,292 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:06:46,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:06:46,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1906239810, now seen corresponding path program 1 times
[2020-07-20 13:06:46,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:06:46,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449878163]
[2020-07-20 13:06:46,304 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 13:06:46,375 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 13:06:46,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:06:46,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 1 conjunts are in the unsatisfiable core
[2020-07-20 13:06:46,387 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:06:46,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 13:06:46,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 13:06:46,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449878163]
[2020-07-20 13:06:46,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 13:06:46,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2020-07-20 13:06:46,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638956006]
[2020-07-20 13:06:46,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states
[2020-07-20 13:06:46,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:06:46,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2020-07-20 13:06:46,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-07-20 13:06:46,441 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states.
[2020-07-20 13:06:46,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:06:46,465 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions.
[2020-07-20 13:06:46,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states.
[2020-07-20 13:06:46,467 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10
[2020-07-20 13:06:46,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:06:46,475 INFO L225 Difference]: With dead ends: 38
[2020-07-20 13:06:46,475 INFO L226 Difference]: Without dead ends: 21
[2020-07-20 13:06:46,478 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
[2020-07-20 13:06:46,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states.
[2020-07-20 13:06:46,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21.
[2020-07-20 13:06:46,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states.
[2020-07-20 13:06:46,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 31 transitions.
[2020-07-20 13:06:46,525 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 31 transitions. Word has length 10
[2020-07-20 13:06:46,525 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:06:46,525 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 31 transitions.
[2020-07-20 13:06:46,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states.
[2020-07-20 13:06:46,526 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 31 transitions.
[2020-07-20 13:06:46,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2020-07-20 13:06:46,527 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 13:06:46,527 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 13:06:46,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:06:46,741 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:06:46,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:06:46,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1847134466, now seen corresponding path program 1 times
[2020-07-20 13:06:46,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:06:46,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541909093]
[2020-07-20 13:06:46,743 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 13:06:46,773 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s)
[2020-07-20 13:06:46,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:06:46,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 13:06:46,776 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:06:46,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 13:06:46,797 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 13:06:46,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541909093]
[2020-07-20 13:06:46,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 13:06:46,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 13:06:46,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86802691]
[2020-07-20 13:06:46,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 13:06:46,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:06:46,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 13:06:46,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 13:06:46,801 INFO L87 Difference]: Start difference. First operand 21 states and 31 transitions. Second operand 3 states.
[2020-07-20 13:06:46,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:06:46,887 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions.
[2020-07-20 13:06:46,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-07-20 13:06:46,888 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10
[2020-07-20 13:06:46,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:06:46,891 INFO L225 Difference]: With dead ends: 28
[2020-07-20 13:06:46,891 INFO L226 Difference]: Without dead ends: 23
[2020-07-20 13:06:46,892 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
[2020-07-20 13:06:46,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states.
[2020-07-20 13:06:46,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22.
[2020-07-20 13:06:46,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states.
[2020-07-20 13:06:46,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions.
[2020-07-20 13:06:46,899 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 10
[2020-07-20 13:06:46,899 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:06:46,899 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions.
[2020-07-20 13:06:46,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 13:06:46,900 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions.
[2020-07-20 13:06:46,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-07-20 13:06:46,901 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 13:06:46,901 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]
[2020-07-20 13:06:47,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:06:47,116 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:06:47,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:06:47,117 INFO L82 PathProgramCache]: Analyzing trace with hash -129940435, now seen corresponding path program 1 times
[2020-07-20 13:06:47,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:06:47,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136688878]
[2020-07-20 13:06:47,119 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 13:06:47,168 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s)
[2020-07-20 13:06:47,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:06:47,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 2 conjunts are in the unsatisfiable core
[2020-07-20 13:06:47,171 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:06:47,225 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts
[2020-07-20 13:06:47,229 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts
[2020-07-20 13:06:47,238 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts
[2020-07-20 13:06:47,249 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts
[2020-07-20 13:06:47,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 13:06:47,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 13:06:47,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136688878]
[2020-07-20 13:06:47,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 13:06:47,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 13:06:47,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462023895]
[2020-07-20 13:06:47,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 13:06:47,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:06:47,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 13:06:47,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 13:06:47,286 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand 3 states.
[2020-07-20 13:06:47,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:06:47,409 INFO L93 Difference]: Finished difference Result 50 states and 81 transitions.
[2020-07-20 13:06:47,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-07-20 13:06:47,410 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21
[2020-07-20 13:06:47,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:06:47,412 INFO L225 Difference]: With dead ends: 50
[2020-07-20 13:06:47,412 INFO L226 Difference]: Without dead ends: 34
[2020-07-20 13:06:47,413 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
[2020-07-20 13:06:47,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states.
[2020-07-20 13:06:47,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33.
[2020-07-20 13:06:47,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states.
[2020-07-20 13:06:47,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions.
[2020-07-20 13:06:47,427 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 21
[2020-07-20 13:06:47,427 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:06:47,427 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions.
[2020-07-20 13:06:47,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 13:06:47,428 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions.
[2020-07-20 13:06:47,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-07-20 13:06:47,429 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 13:06:47,429 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]
[2020-07-20 13:06:47,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:06:47,633 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:06:47,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:06:47,634 INFO L82 PathProgramCache]: Analyzing trace with hash 263086575, now seen corresponding path program 1 times
[2020-07-20 13:06:47,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:06:47,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238416601]
[2020-07-20 13:06:47,636 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 13:06:47,675 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 13:06:47,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:06:47,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 23 conjunts are in the unsatisfiable core
[2020-07-20 13:06:47,679 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:06:47,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 13:06:47,824 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 13:06:52,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 13:06:52,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238416601]
[2020-07-20 13:06:52,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 13:06:52,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24
[2020-07-20 13:06:52,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59549309]
[2020-07-20 13:06:52,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states
[2020-07-20 13:06:52,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:06:52,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants.
[2020-07-20 13:06:52,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=384, Unknown=2, NotChecked=0, Total=552
[2020-07-20 13:06:52,452 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand 24 states.
[2020-07-20 13:06:53,131 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 11
[2020-07-20 13:06:53,907 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 11
[2020-07-20 13:06:56,509 WARN L193 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 53 DAG size of output: 13
[2020-07-20 13:07:11,147 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 38 DAG size of output: 13
[2020-07-20 13:07:27,611 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 21 DAG size of output: 11
[2020-07-20 13:07:32,825 WARN L193 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 48 DAG size of output: 13
[2020-07-20 13:07:44,153 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 13
[2020-07-20 13:08:02,426 WARN L193 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 38 DAG size of output: 13
[2020-07-20 13:08:11,310 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 33 DAG size of output: 13
[2020-07-20 13:08:27,067 WARN L193 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 51 DAG size of output: 11
[2020-07-20 13:08:43,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:08:43,271 INFO L93 Difference]: Finished difference Result 117 states and 137 transitions.
[2020-07-20 13:08:43,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states.
[2020-07-20 13:08:43,271 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 21
[2020-07-20 13:08:43,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:08:43,273 INFO L225 Difference]: With dead ends: 117
[2020-07-20 13:08:43,273 INFO L226 Difference]: Without dead ends: 112
[2020-07-20 13:08:43,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 55.1s TimeCoverageRelationStatistics Valid=700, Invalid=1271, Unknown=9, NotChecked=0, Total=1980
[2020-07-20 13:08:43,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states.
[2020-07-20 13:08:43,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 56.
[2020-07-20 13:08:43,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states.
[2020-07-20 13:08:43,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions.
[2020-07-20 13:08:43,286 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 21
[2020-07-20 13:08:43,286 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:08:43,286 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions.
[2020-07-20 13:08:43,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states.
[2020-07-20 13:08:43,287 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions.
[2020-07-20 13:08:43,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-07-20 13:08:43,288 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 13:08:43,288 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]
[2020-07-20 13:08:43,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:08:43,490 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:08:43,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:08:43,491 INFO L82 PathProgramCache]: Analyzing trace with hash -402778255, now seen corresponding path program 1 times
[2020-07-20 13:08:43,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:08:43,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213514443]
[2020-07-20 13:08:43,493 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 13:08:43,517 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 13:08:43,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:08:43,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core
[2020-07-20 13:08:43,520 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:08:43,556 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 13:08:43,558 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts
[2020-07-20 13:08:43,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 13:08:43,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 13:08:43,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213514443]
[2020-07-20 13:08:43,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 13:08:43,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 13:08:43,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213811827]
[2020-07-20 13:08:43,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 13:08:43,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:08:43,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 13:08:43,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 13:08:43,571 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand 3 states.
[2020-07-20 13:08:43,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:08:43,643 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions.
[2020-07-20 13:08:43,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-07-20 13:08:43,647 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21
[2020-07-20 13:08:43,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:08:43,648 INFO L225 Difference]: With dead ends: 83
[2020-07-20 13:08:43,648 INFO L226 Difference]: Without dead ends: 57
[2020-07-20 13:08:43,650 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
[2020-07-20 13:08:43,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states.
[2020-07-20 13:08:43,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55.
[2020-07-20 13:08:43,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states.
[2020-07-20 13:08:43,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions.
[2020-07-20 13:08:43,663 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 21
[2020-07-20 13:08:43,663 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:08:43,663 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions.
[2020-07-20 13:08:43,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 13:08:43,663 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions.
[2020-07-20 13:08:43,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-07-20 13:08:43,664 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 13:08:43,664 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]
[2020-07-20 13:08:43,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:08:43,880 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:08:43,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:08:43,880 INFO L82 PathProgramCache]: Analyzing trace with hash -345519953, now seen corresponding path program 1 times
[2020-07-20 13:08:43,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:08:43,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1754871390]
[2020-07-20 13:08:43,881 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 13:08:43,910 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 13:08:43,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat
[2020-07-20 13:08:43,910 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-20 13:08:43,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-07-20 13:08:43,919 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-20 13:08:43,930 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-07-20 13:08:43,931 INFO L520 BasicCegarLoop]: Counterexample might be feasible
[2020-07-20 13:08:44,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:08:44,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:08:44 BoogieIcfgContainer
[2020-07-20 13:08:44,160 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-20 13:08:44,162 INFO L168 Benchmark]: Toolchain (without parser) took 118670.76 ms. Allocated memory was 144.7 MB in the beginning and 247.5 MB in the end (delta: 102.8 MB). Free memory was 102.8 MB in the beginning and 146.3 MB in the end (delta: -43.5 MB). Peak memory consumption was 59.3 MB. Max. memory is 7.1 GB.
[2020-07-20 13:08:44,163 INFO L168 Benchmark]: CDTParser took 0.44 ms. Allocated memory is still 144.7 MB. Free memory is still 120.5 MB. There was no memory consumed. Max. memory is 7.1 GB.
[2020-07-20 13:08:44,163 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.84 ms. Allocated memory is still 144.7 MB. Free memory was 102.4 MB in the beginning and 92.0 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB.
[2020-07-20 13:08:44,164 INFO L168 Benchmark]: Boogie Preprocessor took 117.76 ms. Allocated memory was 144.7 MB in the beginning and 201.3 MB in the end (delta: 56.6 MB). Free memory was 92.0 MB in the beginning and 180.9 MB in the end (delta: -88.9 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB.
[2020-07-20 13:08:44,165 INFO L168 Benchmark]: RCFGBuilder took 312.16 ms. Allocated memory is still 201.3 MB. Free memory was 180.0 MB in the beginning and 164.0 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB.
[2020-07-20 13:08:44,166 INFO L168 Benchmark]: TraceAbstraction took 117955.22 ms. Allocated memory was 201.3 MB in the beginning and 247.5 MB in the end (delta: 46.1 MB). Free memory was 163.1 MB in the beginning and 146.3 MB in the end (delta: 16.7 MB). Peak memory consumption was 62.9 MB. Max. memory is 7.1 GB.
[2020-07-20 13:08:44,170 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.44 ms. Allocated memory is still 144.7 MB. Free memory is still 120.5 MB. There was no memory consumed. Max. memory is 7.1 GB.
* CACSL2BoogieTranslator took 278.84 ms. Allocated memory is still 144.7 MB. Free memory was 102.4 MB in the beginning and 92.0 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 117.76 ms. Allocated memory was 144.7 MB in the beginning and 201.3 MB in the end (delta: 56.6 MB). Free memory was 92.0 MB in the beginning and 180.9 MB in the end (delta: -88.9 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 312.16 ms. Allocated memory is still 201.3 MB. Free memory was 180.0 MB in the beginning and 164.0 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 117955.22 ms. Allocated memory was 201.3 MB in the beginning and 247.5 MB in the end (delta: 46.1 MB). Free memory was 163.1 MB in the beginning and 146.3 MB in the end (delta: 16.7 MB). Peak memory consumption was 62.9 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=3]
[L16] COND FALSE !(y % 2 == 0)
[L17] x += 2
VAL [x=2, y=3]
[L19] COND FALSE !(y % 2 == 0)
[L20] x -= 2
VAL [x=0, y=3]
[L22] COND FALSE !(y % 2 == 0)
[L23] x += 2
VAL [x=2, y=3]
[L25] COND FALSE !(y % 2 == 0)
[L26] x -= 2
VAL [x=0, y=3]
[L28] COND FALSE !(y % 2 == 0)
[L29] x += 2
VAL [x=2, y=3]
[L31] COND FALSE !(y % 2 == 0)
[L32] x -= 4
VAL [x=4294967294, y=3]
[L34] COND FALSE !(y % 2 == 0)
[L35] x += 4
VAL [x=2, y=3]
[L37] COND FALSE !(y % 2 == 0)
[L38] x += 2
VAL [x=4, y=3]
[L40] COND FALSE !(y % 2 == 0)
[L41] x -= 4
VAL [x=0, y=3]
[L43] COND FALSE !(y % 2 == 0)
[L44] x -= 4
VAL [x=4294967292, y=3]
[L15] COND FALSE !(x < 99)
VAL [x=4294967292, y=3]
[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: 117.8s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 111.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 120 SDtfs, 58 SDslu, 124 SDs, 0 SdLazy, 672 SolverSat, 414 SolverUnsat, 27 SolverUnknown, 0 SolverNotchecked, 58.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 127 GetRequests, 74 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 55.1s 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, 60 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 4.9s InterpolantComputationTime, 104 NumberOfCodeBlocks, 69 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 98 ConstructedInterpolants, 0 QuantifiedInterpolants, 4960 SizeOfPredicates, 4 NumberOfNonLiveVariables, 160 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...