/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/cggmp2005_variant.i


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


This is Ultimate 0.1.25-d623d84
[2020-07-20 17:55:31,186 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-07-20 17:55:31,190 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-20 17:55:31,210 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-20 17:55:31,210 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-20 17:55:31,213 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-20 17:55:31,215 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-20 17:55:31,225 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-07-20 17:55:31,230 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-07-20 17:55:31,233 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-07-20 17:55:31,235 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-07-20 17:55:31,236 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-20 17:55:31,236 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-20 17:55:31,239 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-20 17:55:31,241 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-20 17:55:31,243 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-20 17:55:31,244 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-20 17:55:31,245 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-20 17:55:31,247 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-20 17:55:31,252 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-20 17:55:31,257 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-20 17:55:31,262 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-20 17:55:31,263 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-07-20 17:55:31,264 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-20 17:55:31,266 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-20 17:55:31,267 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-20 17:55:31,267 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-20 17:55:31,270 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-20 17:55:31,271 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-07-20 17:55:31,272 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-07-20 17:55:31,272 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-07-20 17:55:31,273 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
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[2020-07-20 17:55:31,275 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-07-20 17:55:31,276 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-20 17:55:31,277 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-07-20 17:55:31,278 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
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[2020-07-20 17:55:31,278 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-07-20 17:55:31,281 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-07-20 17:55:31,282 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-07-20 17:55:31,312 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-07-20 17:55:31,312 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-20 17:55:31,315 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-20 17:55:31,315 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-07-20 17:55:31,316 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-07-20 17:55:31,316 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-20 17:55:31,316 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-07-20 17:55:31,316 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-07-20 17:55:31,316 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-07-20 17:55:31,317 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-07-20 17:55:31,318 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-07-20 17:55:31,318 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-20 17:55:31,318 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-07-20 17:55:31,319 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-07-20 17:55:31,319 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-07-20 17:55:31,319 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-07-20 17:55:31,319 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-07-20 17:55:31,320 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-20 17:55:31,320 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-07-20 17:55:31,321 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-07-20 17:55:31,321 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-07-20 17:55:31,323 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 17:55:31,323 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-20 17:55:31,325 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-07-20 17:55:31,325 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-20 17:55:31,326 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-07-20 17:55:31,326 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:55:31,326 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-20 17:55:31,326 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-07-20 17:55:31,326 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4
[2020-07-20 17:55:31,607 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-20 17:55:31,629 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-20 17:55:31,633 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-20 17:55:31,635 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-07-20 17:55:31,638 INFO  L275        PluginConnector]: CDTParser initialized
[2020-07-20 17:55:31,639 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005_variant.i
[2020-07-20 17:55:31,719 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af9681d3a/bcf4b9152f8c4026a0832f25098a4c46/FLAGdd31bf9f5
[2020-07-20 17:55:32,158 INFO  L306              CDTParser]: Found 1 translation units.
[2020-07-20 17:55:32,159 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005_variant.i
[2020-07-20 17:55:32,165 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af9681d3a/bcf4b9152f8c4026a0832f25098a4c46/FLAGdd31bf9f5
[2020-07-20 17:55:32,551 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af9681d3a/bcf4b9152f8c4026a0832f25098a4c46
[2020-07-20 17:55:32,562 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-20 17:55:32,564 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-20 17:55:32,566 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-20 17:55:32,566 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-20 17:55:32,571 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-20 17:55:32,572 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:55:32" (1/1) ...
[2020-07-20 17:55:32,575 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bbde3ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:32, skipping insertion in model container
[2020-07-20 17:55:32,575 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:55:32" (1/1) ...
[2020-07-20 17:55:32,586 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-07-20 17:55:32,607 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-07-20 17:55:32,832 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 17:55:32,837 INFO  L203         MainTranslator]: Completed pre-run
[2020-07-20 17:55:32,857 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 17:55:32,874 INFO  L208         MainTranslator]: Completed translation
[2020-07-20 17:55:32,875 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:32 WrapperNode
[2020-07-20 17:55:32,875 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-20 17:55:32,876 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-20 17:55:32,876 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-20 17:55:32,876 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-07-20 17:55:32,890 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:32" (1/1) ...
[2020-07-20 17:55:32,891 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:32" (1/1) ...
[2020-07-20 17:55:32,896 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:32" (1/1) ...
[2020-07-20 17:55:32,896 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:32" (1/1) ...
[2020-07-20 17:55:32,900 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:32" (1/1) ...
[2020-07-20 17:55:32,906 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:32" (1/1) ...
[2020-07-20 17:55:32,907 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:32" (1/1) ...
[2020-07-20 17:55:32,909 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-20 17:55:32,909 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-20 17:55:32,909 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-07-20 17:55:32,910 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-07-20 17:55:32,911 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:32" (1/1) ...
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 17:55:33,085 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-20 17:55:33,086 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-20 17:55:33,086 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-07-20 17:55:33,086 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-07-20 17:55:33,086 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-07-20 17:55:33,086 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-20 17:55:33,086 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-07-20 17:55:33,086 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-07-20 17:55:33,087 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-07-20 17:55:33,087 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-07-20 17:55:33,087 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-07-20 17:55:33,087 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-20 17:55:33,087 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-20 17:55:33,312 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-20 17:55:33,312 INFO  L295             CfgBuilder]: Removed 1 assume(true) statements.
[2020-07-20 17:55:33,318 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:55:33 BoogieIcfgContainer
[2020-07-20 17:55:33,318 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-20 17:55:33,320 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-20 17:55:33,320 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-07-20 17:55:33,325 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-07-20 17:55:33,325 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:55:32" (1/3) ...
[2020-07-20 17:55:33,326 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cbc1695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:55:33, skipping insertion in model container
[2020-07-20 17:55:33,327 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:32" (2/3) ...
[2020-07-20 17:55:33,334 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cbc1695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:55:33, skipping insertion in model container
[2020-07-20 17:55:33,334 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:55:33" (3/3) ...
[2020-07-20 17:55:33,336 INFO  L109   eAbstractionObserver]: Analyzing ICFG cggmp2005_variant.i
[2020-07-20 17:55:33,351 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-20 17:55:33,359 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-20 17:55:33,389 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-20 17:55:33,415 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-07-20 17:55:33,415 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-07-20 17:55:33,416 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-20 17:55:33,416 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-20 17:55:33,416 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-20 17:55:33,416 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-07-20 17:55:33,416 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-20 17:55:33,417 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-20 17:55:33,434 INFO  L276                IsEmpty]: Start isEmpty. Operand 19 states.
[2020-07-20 17:55:33,441 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2020-07-20 17:55:33,441 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:55:33,442 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 17:55:33,443 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:55:33,448 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:55:33,448 INFO  L82        PathProgramCache]: Analyzing trace with hash 1608903343, now seen corresponding path program 1 times
[2020-07-20 17:55:33,455 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:55:33,456 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862280880]
[2020-07-20 17:55:33,456 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:55:33,554 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 17:55:33,554 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:55:33,561 INFO  L263         TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core
[2020-07-20 17:55:33,572 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:55:33,603 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 17:55:33,603 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 17:55:33,604 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862280880]
[2020-07-20 17:55:33,605 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 17:55:33,605 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 17:55:33,606 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029994363]
[2020-07-20 17:55:33,611 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 17:55:33,611 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:55:33,621 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 17:55:33,622 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 17:55:33,625 INFO  L87              Difference]: Start difference. First operand 19 states. Second operand 3 states.
[2020-07-20 17:55:33,670 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:55:33,671 INFO  L93              Difference]: Finished difference Result 32 states and 38 transitions.
[2020-07-20 17:55:33,671 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 17:55:33,672 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 11
[2020-07-20 17:55:33,673 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:55:33,680 INFO  L225             Difference]: With dead ends: 32
[2020-07-20 17:55:33,680 INFO  L226             Difference]: Without dead ends: 13
[2020-07-20 17:55:33,683 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 17:55:33,697 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13 states.
[2020-07-20 17:55:33,714 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13.
[2020-07-20 17:55:33,716 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 13 states.
[2020-07-20 17:55:33,716 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions.
[2020-07-20 17:55:33,718 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11
[2020-07-20 17:55:33,719 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:55:33,719 INFO  L479      AbstractCegarLoop]: Abstraction has 13 states and 13 transitions.
[2020-07-20 17:55:33,719 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 17:55:33,719 INFO  L276                IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions.
[2020-07-20 17:55:33,720 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2020-07-20 17:55:33,720 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:55:33,720 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 17:55:33,934 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:55:33,934 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:55:33,935 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:55:33,936 INFO  L82        PathProgramCache]: Analyzing trace with hash -1628066164, now seen corresponding path program 1 times
[2020-07-20 17:55:33,936 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:55:33,937 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387908057]
[2020-07-20 17:55:33,937 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:55:33,969 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 17:55:33,970 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:55:33,971 INFO  L263         TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core
[2020-07-20 17:55:33,973 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:55:34,114 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts
[2020-07-20 17:55:34,166 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 17:55:34,166 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 17:55:34,196 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 17:55:34,332 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 17:55:34,332 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387908057]
[2020-07-20 17:55:34,333 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 17:55:34,333 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12
[2020-07-20 17:55:34,333 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063384810]
[2020-07-20 17:55:34,335 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 12 states
[2020-07-20 17:55:34,335 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:55:34,335 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2020-07-20 17:55:34,336 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132
[2020-07-20 17:55:34,336 INFO  L87              Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states.
[2020-07-20 17:55:34,559 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:55:34,559 INFO  L93              Difference]: Finished difference Result 21 states and 22 transitions.
[2020-07-20 17:55:34,560 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2020-07-20 17:55:34,560 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states. Word has length 12
[2020-07-20 17:55:34,561 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:55:34,561 INFO  L225             Difference]: With dead ends: 21
[2020-07-20 17:55:34,561 INFO  L226             Difference]: Without dead ends: 15
[2020-07-20 17:55:34,563 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272
[2020-07-20 17:55:34,564 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 15 states.
[2020-07-20 17:55:34,568 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15.
[2020-07-20 17:55:34,568 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 15 states.
[2020-07-20 17:55:34,569 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions.
[2020-07-20 17:55:34,569 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12
[2020-07-20 17:55:34,570 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:55:34,570 INFO  L479      AbstractCegarLoop]: Abstraction has 15 states and 15 transitions.
[2020-07-20 17:55:34,570 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 12 states.
[2020-07-20 17:55:34,570 INFO  L276                IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions.
[2020-07-20 17:55:34,571 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2020-07-20 17:55:34,571 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:55:34,571 INFO  L422         BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 17:55:34,786 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:55:34,786 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:55:34,787 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:55:34,788 INFO  L82        PathProgramCache]: Analyzing trace with hash -66279700, now seen corresponding path program 2 times
[2020-07-20 17:55:34,788 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:55:34,789 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258853590]
[2020-07-20 17:55:34,789 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:55:34,823 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 17:55:34,824 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:55:34,825 WARN  L261         TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 26 conjunts are in the unsatisfiable core
[2020-07-20 17:55:34,827 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:55:34,936 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts
[2020-07-20 17:55:34,971 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 17:55:34,972 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 17:55:35,002 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 17:55:35,128 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 17:55:35,128 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258853590]
[2020-07-20 17:55:35,129 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 17:55:35,129 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15
[2020-07-20 17:55:35,129 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749700715]
[2020-07-20 17:55:35,130 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 15 states
[2020-07-20 17:55:35,130 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:55:35,130 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2020-07-20 17:55:35,131 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210
[2020-07-20 17:55:35,131 INFO  L87              Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 15 states.
[2020-07-20 17:55:35,578 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:55:35,578 INFO  L93              Difference]: Finished difference Result 25 states and 28 transitions.
[2020-07-20 17:55:35,579 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. 
[2020-07-20 17:55:35,579 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states. Word has length 14
[2020-07-20 17:55:35,580 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:55:35,580 INFO  L225             Difference]: With dead ends: 25
[2020-07-20 17:55:35,580 INFO  L226             Difference]: Without dead ends: 19
[2020-07-20 17:55:35,581 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600
[2020-07-20 17:55:35,582 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 19 states.
[2020-07-20 17:55:35,587 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19.
[2020-07-20 17:55:35,588 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 19 states.
[2020-07-20 17:55:35,589 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions.
[2020-07-20 17:55:35,589 INFO  L78                 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 14
[2020-07-20 17:55:35,589 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:55:35,590 INFO  L479      AbstractCegarLoop]: Abstraction has 19 states and 19 transitions.
[2020-07-20 17:55:35,590 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 15 states.
[2020-07-20 17:55:35,590 INFO  L276                IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions.
[2020-07-20 17:55:35,591 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2020-07-20 17:55:35,591 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:55:35,591 INFO  L422         BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 17:55:35,804 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:55:35,805 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:55:35,805 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:55:35,806 INFO  L82        PathProgramCache]: Analyzing trace with hash -43331668, now seen corresponding path program 3 times
[2020-07-20 17:55:35,806 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:55:35,806 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521112965]
[2020-07-20 17:55:35,806 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:55:35,845 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 17:55:35,845 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:55:35,847 WARN  L261         TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 50 conjunts are in the unsatisfiable core
[2020-07-20 17:55:35,849 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:55:36,024 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts
[2020-07-20 17:55:36,072 INFO  L134       CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 17:55:36,072 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 17:55:36,110 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 17:55:36,405 INFO  L134       CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 17:55:36,406 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521112965]
[2020-07-20 17:55:36,406 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 17:55:36,407 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23
[2020-07-20 17:55:36,407 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649534735]
[2020-07-20 17:55:36,408 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 23 states
[2020-07-20 17:55:36,408 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:55:36,408 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2020-07-20 17:55:36,409 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506
[2020-07-20 17:55:36,409 INFO  L87              Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 23 states.
[2020-07-20 17:55:37,592 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:55:37,592 INFO  L93              Difference]: Finished difference Result 33 states and 40 transitions.
[2020-07-20 17:55:37,593 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. 
[2020-07-20 17:55:37,593 INFO  L78                 Accepts]: Start accepts. Automaton has 23 states. Word has length 18
[2020-07-20 17:55:37,593 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:55:37,594 INFO  L225             Difference]: With dead ends: 33
[2020-07-20 17:55:37,594 INFO  L226             Difference]: Without dead ends: 27
[2020-07-20 17:55:37,596 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=356, Invalid=1284, Unknown=0, NotChecked=0, Total=1640
[2020-07-20 17:55:37,596 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 27 states.
[2020-07-20 17:55:37,602 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27.
[2020-07-20 17:55:37,603 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 27 states.
[2020-07-20 17:55:37,604 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions.
[2020-07-20 17:55:37,604 INFO  L78                 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 18
[2020-07-20 17:55:37,605 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:55:37,605 INFO  L479      AbstractCegarLoop]: Abstraction has 27 states and 27 transitions.
[2020-07-20 17:55:37,605 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 23 states.
[2020-07-20 17:55:37,605 INFO  L276                IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions.
[2020-07-20 17:55:37,606 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2020-07-20 17:55:37,606 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:55:37,606 INFO  L422         BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 17:55:37,819 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:55:37,820 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:55:37,821 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:55:37,821 INFO  L82        PathProgramCache]: Analyzing trace with hash 101712172, now seen corresponding path program 4 times
[2020-07-20 17:55:37,821 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:55:37,822 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282264651]
[2020-07-20 17:55:37,822 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:55:37,874 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 17:55:37,875 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:55:37,877 WARN  L261         TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 98 conjunts are in the unsatisfiable core
[2020-07-20 17:55:37,880 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:55:38,234 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts
[2020-07-20 17:55:38,307 INFO  L134       CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 17:55:38,307 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 17:55:38,377 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 17:55:39,299 INFO  L134       CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 17:55:39,302 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282264651]
[2020-07-20 17:55:39,303 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 17:55:39,303 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40
[2020-07-20 17:55:39,303 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119997056]
[2020-07-20 17:55:39,304 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 40 states
[2020-07-20 17:55:39,304 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:55:39,305 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants.
[2020-07-20 17:55:39,306 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=1250, Unknown=0, NotChecked=0, Total=1560
[2020-07-20 17:55:39,306 INFO  L87              Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 40 states.
[2020-07-20 17:55:40,186 WARN  L193               SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 113
[2020-07-20 17:55:40,469 WARN  L193               SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 76
[2020-07-20 17:55:40,671 WARN  L193               SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 99
[2020-07-20 17:55:40,892 WARN  L193               SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 66
[2020-07-20 17:55:41,083 WARN  L193               SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 93
[2020-07-20 17:55:43,009 WARN  L193               SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 103
[2020-07-20 17:55:43,020 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:55:43,020 INFO  L93              Difference]: Finished difference Result 49 states and 64 transitions.
[2020-07-20 17:55:43,021 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. 
[2020-07-20 17:55:43,021 INFO  L78                 Accepts]: Start accepts. Automaton has 40 states. Word has length 26
[2020-07-20 17:55:43,022 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:55:43,022 INFO  L225             Difference]: With dead ends: 49
[2020-07-20 17:55:43,022 INFO  L226             Difference]: Without dead ends: 43
[2020-07-20 17:55:43,025 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1203, Invalid=4199, Unknown=0, NotChecked=0, Total=5402
[2020-07-20 17:55:43,026 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 43 states.
[2020-07-20 17:55:43,036 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43.
[2020-07-20 17:55:43,036 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 43 states.
[2020-07-20 17:55:43,037 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions.
[2020-07-20 17:55:43,038 INFO  L78                 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 26
[2020-07-20 17:55:43,038 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:55:43,038 INFO  L479      AbstractCegarLoop]: Abstraction has 43 states and 43 transitions.
[2020-07-20 17:55:43,038 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 40 states.
[2020-07-20 17:55:43,038 INFO  L276                IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions.
[2020-07-20 17:55:43,039 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 43
[2020-07-20 17:55:43,039 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:55:43,040 INFO  L422         BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 17:55:43,246 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:55:43,247 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:55:43,247 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:55:43,248 INFO  L82        PathProgramCache]: Analyzing trace with hash -868359124, now seen corresponding path program 5 times
[2020-07-20 17:55:43,248 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:55:43,249 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945124394]
[2020-07-20 17:55:43,249 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:55:43,310 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 17:55:43,311 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:55:43,315 WARN  L261         TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 194 conjunts are in the unsatisfiable core
[2020-07-20 17:55:43,325 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:55:44,393 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts
[2020-07-20 17:55:44,508 INFO  L134       CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 17:55:44,508 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 17:55:44,622 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 17:55:47,768 INFO  L134       CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 17:55:47,768 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945124394]
[2020-07-20 17:55:47,769 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 17:55:47,769 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 72
[2020-07-20 17:55:47,777 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81194278]
[2020-07-20 17:55:47,778 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 72 states
[2020-07-20 17:55:47,780 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:55:47,782 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants.
[2020-07-20 17:55:47,785 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1110, Invalid=4002, Unknown=0, NotChecked=0, Total=5112
[2020-07-20 17:55:47,785 INFO  L87              Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 72 states.
[2020-07-20 17:55:50,746 WARN  L193               SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 217
[2020-07-20 17:55:51,377 WARN  L193               SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 140
[2020-07-20 17:55:51,990 WARN  L193               SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 203
[2020-07-20 17:55:52,542 WARN  L193               SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 130
[2020-07-20 17:55:53,111 WARN  L193               SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 197
[2020-07-20 17:55:53,772 WARN  L193               SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 190
[2020-07-20 17:55:54,306 WARN  L193               SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 184
[2020-07-20 17:55:54,857 WARN  L193               SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 177
[2020-07-20 17:55:55,414 WARN  L193               SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 171
[2020-07-20 17:55:55,948 WARN  L193               SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 164
[2020-07-20 17:55:56,455 WARN  L193               SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 158
[2020-07-20 17:55:56,952 WARN  L193               SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 151
[2020-07-20 17:55:57,441 WARN  L193               SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 145
[2020-07-20 17:55:57,929 WARN  L193               SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 138
[2020-07-20 17:55:58,369 WARN  L193               SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 132
[2020-07-20 17:55:58,787 WARN  L193               SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 125
[2020-07-20 17:55:59,198 WARN  L193               SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 119
[2020-07-20 17:55:59,588 WARN  L193               SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 112
[2020-07-20 17:55:59,986 WARN  L193               SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 106
[2020-07-20 17:56:00,360 WARN  L193               SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 99
[2020-07-20 17:56:00,712 WARN  L193               SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 93
[2020-07-20 17:56:01,055 WARN  L193               SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 86
[2020-07-20 17:56:04,630 WARN  L193               SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 207
[2020-07-20 17:56:04,642 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:56:04,643 INFO  L93              Difference]: Finished difference Result 81 states and 112 transitions.
[2020-07-20 17:56:04,643 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. 
[2020-07-20 17:56:04,644 INFO  L78                 Accepts]: Start accepts. Automaton has 72 states. Word has length 42
[2020-07-20 17:56:04,644 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:56:04,646 INFO  L225             Difference]: With dead ends: 81
[2020-07-20 17:56:04,646 INFO  L226             Difference]: Without dead ends: 75
[2020-07-20 17:56:04,651 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2465 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=4419, Invalid=14487, Unknown=0, NotChecked=0, Total=18906
[2020-07-20 17:56:04,651 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 75 states.
[2020-07-20 17:56:04,673 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75.
[2020-07-20 17:56:04,673 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 75 states.
[2020-07-20 17:56:04,675 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions.
[2020-07-20 17:56:04,675 INFO  L78                 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 42
[2020-07-20 17:56:04,675 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:56:04,675 INFO  L479      AbstractCegarLoop]: Abstraction has 75 states and 75 transitions.
[2020-07-20 17:56:04,676 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 72 states.
[2020-07-20 17:56:04,676 INFO  L276                IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions.
[2020-07-20 17:56:04,678 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 75
[2020-07-20 17:56:04,678 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:56:04,678 INFO  L422         BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 17:56:04,892 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:56:04,893 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:56:04,894 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:56:04,894 INFO  L82        PathProgramCache]: Analyzing trace with hash 1445440044, now seen corresponding path program 6 times
[2020-07-20 17:56:04,894 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:56:04,895 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115176546]
[2020-07-20 17:56:04,895 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:56:04,995 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 17:56:04,995 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:56:05,014 WARN  L261         TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 386 conjunts are in the unsatisfiable core
[2020-07-20 17:56:05,020 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:56:08,999 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts
[2020-07-20 17:56:09,243 INFO  L134       CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 17:56:09,243 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 17:56:09,461 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 17:56:22,223 INFO  L134       CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 17:56:22,224 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115176546]
[2020-07-20 17:56:22,224 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 17:56:22,224 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 135
[2020-07-20 17:56:22,225 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952861874]
[2020-07-20 17:56:22,226 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 135 states
[2020-07-20 17:56:22,226 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:56:22,227 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants.
[2020-07-20 17:56:22,232 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=4241, Invalid=13849, Unknown=0, NotChecked=0, Total=18090
[2020-07-20 17:56:22,233 INFO  L87              Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 135 states.
[2020-07-20 17:56:32,945 WARN  L193               SmtUtils]: Spent 977.00 ms on a formula simplification that was a NOOP. DAG size: 427
[2020-07-20 17:56:34,766 WARN  L193               SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 428 DAG size of output: 270
[2020-07-20 17:56:37,219 WARN  L193               SmtUtils]: Spent 844.00 ms on a formula simplification that was a NOOP. DAG size: 411
[2020-07-20 17:56:38,754 WARN  L193               SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 416 DAG size of output: 258
[2020-07-20 17:56:41,156 WARN  L193               SmtUtils]: Spent 843.00 ms on a formula simplification that was a NOOP. DAG size: 405
[2020-07-20 17:56:43,769 WARN  L193               SmtUtils]: Spent 851.00 ms on a formula simplification that was a NOOP. DAG size: 398
[2020-07-20 17:56:46,180 WARN  L193               SmtUtils]: Spent 827.00 ms on a formula simplification that was a NOOP. DAG size: 392
[2020-07-20 17:56:48,554 WARN  L193               SmtUtils]: Spent 811.00 ms on a formula simplification that was a NOOP. DAG size: 385
[2020-07-20 17:56:50,904 WARN  L193               SmtUtils]: Spent 794.00 ms on a formula simplification that was a NOOP. DAG size: 379
[2020-07-20 17:56:53,287 WARN  L193               SmtUtils]: Spent 813.00 ms on a formula simplification that was a NOOP. DAG size: 372
[2020-07-20 17:56:55,655 WARN  L193               SmtUtils]: Spent 783.00 ms on a formula simplification that was a NOOP. DAG size: 366
[2020-07-20 17:56:57,984 WARN  L193               SmtUtils]: Spent 764.00 ms on a formula simplification that was a NOOP. DAG size: 359
[2020-07-20 17:57:00,343 WARN  L193               SmtUtils]: Spent 780.00 ms on a formula simplification that was a NOOP. DAG size: 353
[2020-07-20 17:57:02,713 WARN  L193               SmtUtils]: Spent 756.00 ms on a formula simplification that was a NOOP. DAG size: 346
[2020-07-20 17:57:05,048 WARN  L193               SmtUtils]: Spent 753.00 ms on a formula simplification that was a NOOP. DAG size: 340
[2020-07-20 17:57:07,359 WARN  L193               SmtUtils]: Spent 720.00 ms on a formula simplification that was a NOOP. DAG size: 333
[2020-07-20 17:57:09,690 WARN  L193               SmtUtils]: Spent 741.00 ms on a formula simplification that was a NOOP. DAG size: 327
[2020-07-20 17:57:11,955 WARN  L193               SmtUtils]: Spent 672.00 ms on a formula simplification that was a NOOP. DAG size: 320
[2020-07-20 17:57:14,230 WARN  L193               SmtUtils]: Spent 682.00 ms on a formula simplification that was a NOOP. DAG size: 314
[2020-07-20 17:57:16,479 WARN  L193               SmtUtils]: Spent 678.00 ms on a formula simplification that was a NOOP. DAG size: 307
[2020-07-20 17:57:18,697 WARN  L193               SmtUtils]: Spent 662.00 ms on a formula simplification that was a NOOP. DAG size: 301
[2020-07-20 17:57:20,899 WARN  L193               SmtUtils]: Spent 628.00 ms on a formula simplification that was a NOOP. DAG size: 294
[2020-07-20 17:57:23,099 WARN  L193               SmtUtils]: Spent 636.00 ms on a formula simplification that was a NOOP. DAG size: 288
[2020-07-20 17:57:25,359 WARN  L193               SmtUtils]: Spent 694.00 ms on a formula simplification that was a NOOP. DAG size: 281
[2020-07-20 17:57:27,584 WARN  L193               SmtUtils]: Spent 609.00 ms on a formula simplification that was a NOOP. DAG size: 275
[2020-07-20 17:57:29,709 WARN  L193               SmtUtils]: Spent 614.00 ms on a formula simplification that was a NOOP. DAG size: 268
[2020-07-20 17:57:31,880 WARN  L193               SmtUtils]: Spent 605.00 ms on a formula simplification that was a NOOP. DAG size: 262
[2020-07-20 17:57:33,984 WARN  L193               SmtUtils]: Spent 570.00 ms on a formula simplification that was a NOOP. DAG size: 255
[2020-07-20 17:57:36,050 WARN  L193               SmtUtils]: Spent 564.00 ms on a formula simplification that was a NOOP. DAG size: 249
[2020-07-20 17:57:38,128 WARN  L193               SmtUtils]: Spent 552.00 ms on a formula simplification that was a NOOP. DAG size: 242
[2020-07-20 17:57:40,178 WARN  L193               SmtUtils]: Spent 527.00 ms on a formula simplification that was a NOOP. DAG size: 236
[2020-07-20 17:57:42,162 WARN  L193               SmtUtils]: Spent 523.00 ms on a formula simplification that was a NOOP. DAG size: 229
[2020-07-20 17:57:44,132 WARN  L193               SmtUtils]: Spent 514.00 ms on a formula simplification that was a NOOP. DAG size: 223
[2020-07-20 17:57:46,027 WARN  L193               SmtUtils]: Spent 485.00 ms on a formula simplification that was a NOOP. DAG size: 216
[2020-07-20 17:57:47,969 WARN  L193               SmtUtils]: Spent 513.00 ms on a formula simplification that was a NOOP. DAG size: 210
[2020-07-20 17:57:49,793 WARN  L193               SmtUtils]: Spent 457.00 ms on a formula simplification that was a NOOP. DAG size: 203
[2020-07-20 17:57:51,658 WARN  L193               SmtUtils]: Spent 467.00 ms on a formula simplification that was a NOOP. DAG size: 197
[2020-07-20 17:57:53,456 WARN  L193               SmtUtils]: Spent 420.00 ms on a formula simplification that was a NOOP. DAG size: 190
[2020-07-20 17:57:55,194 WARN  L193               SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 184
[2020-07-20 17:57:56,912 WARN  L193               SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 177
[2020-07-20 17:57:58,581 WARN  L193               SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 171
[2020-07-20 17:58:00,290 WARN  L193               SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 164
[2020-07-20 17:58:01,892 WARN  L193               SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 158
[2020-07-20 17:58:03,467 WARN  L193               SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 151
[2020-07-20 17:58:05,027 WARN  L193               SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 145
[2020-07-20 17:58:06,556 WARN  L193               SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 138
[2020-07-20 17:58:08,005 WARN  L193               SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 132
[2020-07-20 17:58:09,375 WARN  L193               SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 125
[2020-07-20 17:58:10,718 WARN  L193               SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 119
[2020-07-20 17:58:12,014 WARN  L193               SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 112
[2020-07-20 17:58:13,320 WARN  L193               SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 106
[2020-07-20 17:58:14,562 WARN  L193               SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 99
[2020-07-20 17:58:15,751 WARN  L193               SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 93
[2020-07-20 17:58:16,861 WARN  L193               SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 86
[2020-07-20 17:58:17,952 WARN  L193               SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 80
[2020-07-20 17:58:19,005 WARN  L193               SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 73
[2020-07-20 17:58:20,082 WARN  L193               SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 67
[2020-07-20 17:58:21,037 WARN  L193               SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 60
[2020-07-20 17:58:21,960 WARN  L193               SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 54
[2020-07-20 17:58:22,850 WARN  L193               SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 47
[2020-07-20 17:58:23,703 WARN  L193               SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 41
[2020-07-20 17:58:31,028 WARN  L193               SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 415
[2020-07-20 17:58:31,053 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:58:31,053 INFO  L93              Difference]: Finished difference Result 145 states and 208 transitions.
[2020-07-20 17:58:31,055 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. 
[2020-07-20 17:58:31,055 INFO  L78                 Accepts]: Start accepts. Automaton has 135 states. Word has length 74
[2020-07-20 17:58:31,056 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:58:31,058 INFO  L225             Difference]: With dead ends: 145
[2020-07-20 17:58:31,058 INFO  L226             Difference]: Without dead ends: 139
[2020-07-20 17:58:31,065 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8959 ImplicationChecksByTransitivity, 139.0s TimeCoverageRelationStatistics Valid=16988, Invalid=52972, Unknown=0, NotChecked=0, Total=69960
[2020-07-20 17:58:31,066 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 139 states.
[2020-07-20 17:58:31,118 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139.
[2020-07-20 17:58:31,118 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 139 states.
[2020-07-20 17:58:31,120 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions.
[2020-07-20 17:58:31,121 INFO  L78                 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 74
[2020-07-20 17:58:31,121 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:58:31,121 INFO  L479      AbstractCegarLoop]: Abstraction has 139 states and 139 transitions.
[2020-07-20 17:58:31,121 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 135 states.
[2020-07-20 17:58:31,122 INFO  L276                IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions.
[2020-07-20 17:58:31,124 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 139
[2020-07-20 17:58:31,124 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:58:31,124 INFO  L422         BasicCegarLoop]: trace histogram [127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 17:58:31,339 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:58:31,340 INFO  L427      AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:58:31,341 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:58:31,341 INFO  L82        PathProgramCache]: Analyzing trace with hash -1338821076, now seen corresponding path program 7 times
[2020-07-20 17:58:31,341 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:58:31,342 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430905563]
[2020-07-20 17:58:31,342 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:58:31,554 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 17:58:31,568 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:58:31,603 WARN  L261         TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 770 conjunts are in the unsatisfiable core
[2020-07-20 17:58:31,612 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:58:57,358 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts
[2020-07-20 17:58:58,211 INFO  L134       CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 17:58:58,211 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 17:58:59,033 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 18:00:48,104 INFO  L134       CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 18:00:48,104 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430905563]
[2020-07-20 18:00:48,105 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 18:00:48,105 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 134] total 263
[2020-07-20 18:00:48,105 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664663218]
[2020-07-20 18:00:48,106 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 263 states
[2020-07-20 18:00:48,106 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 18:00:48,109 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 263 interpolants.
[2020-07-20 18:00:48,113 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=16657, Invalid=52249, Unknown=0, NotChecked=0, Total=68906
[2020-07-20 18:00:48,114 INFO  L87              Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 263 states.
[2020-07-20 18:04:07,340 WARN  L193               SmtUtils]: Spent 12.81 s on a formula simplification that was a NOOP. DAG size: 843
[2020-07-20 18:04:22,829 WARN  L193               SmtUtils]: Spent 12.44 s on a formula simplification. DAG size of input: 844 DAG size of output: 526
[2020-07-20 18:05:54,230 WARN  L193               SmtUtils]: Spent 11.15 s on a formula simplification that was a NOOP. DAG size: 827
[2020-07-20 18:06:09,090 WARN  L193               SmtUtils]: Spent 12.79 s on a formula simplification. DAG size of input: 832 DAG size of output: 514
[2020-07-20 18:07:47,126 WARN  L193               SmtUtils]: Spent 12.34 s on a formula simplification that was a NOOP. DAG size: 821
[2020-07-20 18:09:32,263 WARN  L193               SmtUtils]: Spent 12.78 s on a formula simplification that was a NOOP. DAG size: 814