/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/locks/test_locks_10.c


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


This is Ultimate 0.1.25-d623d84
[2020-07-20 17:12:18,112 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-07-20 17:12:18,116 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-20 17:12:18,133 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-20 17:12:18,134 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-20 17:12:18,136 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-20 17:12:18,139 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2020-07-20 17:12:18,151 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
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[2020-07-20 17:12:18,155 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-20 17:12:18,157 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-20 17:12:18,159 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-20 17:12:18,161 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-20 17:12:18,163 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-20 17:12:18,168 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-20 17:12:18,171 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-20 17:12:18,173 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-20 17:12:18,175 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-07-20 17:12:18,176 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-20 17:12:18,181 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-20 17:12:18,182 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-20 17:12:18,182 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-20 17:12:18,184 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-20 17:12:18,185 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
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[2020-07-20 17:12:18,187 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
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[2020-07-20 17:12:18,196 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2020-07-20 17:12:18,198 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-07-20 17:12:18,200 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-07-20 17:12:18,202 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 17:12:18,224 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-07-20 17:12:18,225 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-20 17:12:18,228 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-20 17:12:18,229 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-07-20 17:12:18,229 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-07-20 17:12:18,229 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-20 17:12:18,230 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-07-20 17:12:18,230 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-07-20 17:12:18,230 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-07-20 17:12:18,230 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-07-20 17:12:18,231 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-07-20 17:12:18,231 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-20 17:12:18,231 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-07-20 17:12:18,231 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-07-20 17:12:18,232 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-07-20 17:12:18,232 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-07-20 17:12:18,232 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-07-20 17:12:18,232 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-20 17:12:18,232 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-07-20 17:12:18,233 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-07-20 17:12:18,233 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-07-20 17:12:18,233 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 17:12:18,233 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-20 17:12:18,233 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-07-20 17:12:18,234 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-20 17:12:18,234 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-07-20 17:12:18,234 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:18,234 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-20 17:12:18,234 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-07-20 17:12:18,235 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 17:12:18,647 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-20 17:12:18,690 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-20 17:12:18,697 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-20 17:12:18,700 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-07-20 17:12:18,701 INFO  L275        PluginConnector]: CDTParser initialized
[2020-07-20 17:12:18,703 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c
[2020-07-20 17:12:18,798 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84ed8d726/dcb2ba0cc294477da16cb9caccc39a4d/FLAG9cb361f25
[2020-07-20 17:12:19,575 INFO  L306              CDTParser]: Found 1 translation units.
[2020-07-20 17:12:19,576 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_10.c
[2020-07-20 17:12:19,596 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84ed8d726/dcb2ba0cc294477da16cb9caccc39a4d/FLAG9cb361f25
[2020-07-20 17:12:19,844 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84ed8d726/dcb2ba0cc294477da16cb9caccc39a4d
[2020-07-20 17:12:19,868 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-20 17:12:19,873 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-20 17:12:19,875 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-20 17:12:19,876 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-20 17:12:19,882 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-20 17:12:19,884 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:12:19" (1/1) ...
[2020-07-20 17:12:19,889 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e9bc63f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:12:19, skipping insertion in model container
[2020-07-20 17:12:19,890 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:12:19" (1/1) ...
[2020-07-20 17:12:19,903 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-07-20 17:12:19,939 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-07-20 17:12:20,224 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 17:12:20,232 INFO  L203         MainTranslator]: Completed pre-run
[2020-07-20 17:12:20,293 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 17:12:20,316 INFO  L208         MainTranslator]: Completed translation
[2020-07-20 17:12:20,317 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:12:20 WrapperNode
[2020-07-20 17:12:20,318 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-20 17:12:20,319 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-20 17:12:20,319 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-20 17:12:20,319 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-07-20 17:12:20,339 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:12:20" (1/1) ...
[2020-07-20 17:12:20,340 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:12:20" (1/1) ...
[2020-07-20 17:12:20,484 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:12:20" (1/1) ...
[2020-07-20 17:12:20,486 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:12:20" (1/1) ...
[2020-07-20 17:12:20,506 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:12:20" (1/1) ...
[2020-07-20 17:12:20,522 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:12:20" (1/1) ...
[2020-07-20 17:12:20,530 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:12:20" (1/1) ...
[2020-07-20 17:12:20,536 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-20 17:12:20,537 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-20 17:12:20,538 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-07-20 17:12:20,538 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-07-20 17:12:20,540 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:12:20" (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 17:12:20,635 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-20 17:12:20,635 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-20 17:12:20,635 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-07-20 17:12:20,636 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-20 17:12:20,636 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-07-20 17:12:20,636 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-07-20 17:12:20,636 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-20 17:12:20,637 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-20 17:12:21,107 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-20 17:12:21,107 INFO  L295             CfgBuilder]: Removed 1 assume(true) statements.
[2020-07-20 17:12:21,121 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:12:21 BoogieIcfgContainer
[2020-07-20 17:12:21,122 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-20 17:12:21,126 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-20 17:12:21,127 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-07-20 17:12:21,133 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-07-20 17:12:21,134 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:12:19" (1/3) ...
[2020-07-20 17:12:21,135 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b45bc95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:12:21, skipping insertion in model container
[2020-07-20 17:12:21,136 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:12:20" (2/3) ...
[2020-07-20 17:12:21,136 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b45bc95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:12:21, skipping insertion in model container
[2020-07-20 17:12:21,136 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:12:21" (3/3) ...
[2020-07-20 17:12:21,140 INFO  L109   eAbstractionObserver]: Analyzing ICFG test_locks_10.c
[2020-07-20 17:12:21,166 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-20 17:12:21,183 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-20 17:12:21,226 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-20 17:12:21,285 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-07-20 17:12:21,286 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-07-20 17:12:21,286 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-20 17:12:21,286 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-20 17:12:21,286 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-20 17:12:21,287 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-07-20 17:12:21,287 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-20 17:12:21,287 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-20 17:12:21,326 INFO  L276                IsEmpty]: Start isEmpty. Operand 44 states.
[2020-07-20 17:12:21,347 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2020-07-20 17:12:21,348 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:12:21,352 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]
[2020-07-20 17:12:21,353 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:12:21,363 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:12:21,363 INFO  L82        PathProgramCache]: Analyzing trace with hash -917347053, now seen corresponding path program 1 times
[2020-07-20 17:12:21,388 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:12:21,389 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90758147]
[2020-07-20 17:12:21,390 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 17:12:21,572 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 17:12:21,573 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:12:21,578 INFO  L263         TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 17:12:21,588 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:12:21,646 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 17:12:21,647 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 17:12:21,649 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90758147]
[2020-07-20 17:12:21,651 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 17:12:21,652 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 17:12:21,654 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256935279]
[2020-07-20 17:12:21,665 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 17:12:21,666 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:12:21,685 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 17:12:21,687 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 17:12:21,690 INFO  L87              Difference]: Start difference. First operand 44 states. Second operand 3 states.
[2020-07-20 17:12:21,801 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:12:21,802 INFO  L93              Difference]: Finished difference Result 87 states and 150 transitions.
[2020-07-20 17:12:21,804 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 17:12:21,807 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 20
[2020-07-20 17:12:21,809 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:12:21,855 INFO  L225             Difference]: With dead ends: 87
[2020-07-20 17:12:21,860 INFO  L226             Difference]: Without dead ends: 72
[2020-07-20 17:12:21,871 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 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 17:12:21,916 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 72 states.
[2020-07-20 17:12:21,981 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50.
[2020-07-20 17:12:21,983 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 50 states.
[2020-07-20 17:12:21,990 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 89 transitions.
[2020-07-20 17:12:21,994 INFO  L78                 Accepts]: Start accepts. Automaton has 50 states and 89 transitions. Word has length 20
[2020-07-20 17:12:21,995 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:12:21,997 INFO  L479      AbstractCegarLoop]: Abstraction has 50 states and 89 transitions.
[2020-07-20 17:12:21,997 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 17:12:21,998 INFO  L276                IsEmpty]: Start isEmpty. Operand 50 states and 89 transitions.
[2020-07-20 17:12:22,000 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2020-07-20 17:12:22,000 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:12:22,001 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]
[2020-07-20 17:12:22,215 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:22,216 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:12:22,217 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:12:22,218 INFO  L82        PathProgramCache]: Analyzing trace with hash -1504153067, now seen corresponding path program 1 times
[2020-07-20 17:12:22,218 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:12:22,219 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242216269]
[2020-07-20 17:12:22,219 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 17:12:22,344 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 17:12:22,344 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:12:22,347 INFO  L263         TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 17:12:22,350 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:12:22,363 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 17:12:22,364 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 17:12:22,365 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242216269]
[2020-07-20 17:12:22,365 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 17:12:22,365 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 17:12:22,366 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732725249]
[2020-07-20 17:12:22,368 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 17:12:22,368 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:12:22,369 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 17:12:22,370 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 17:12:22,371 INFO  L87              Difference]: Start difference. First operand 50 states and 89 transitions. Second operand 3 states.
[2020-07-20 17:12:22,412 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:12:22,413 INFO  L93              Difference]: Finished difference Result 117 states and 212 transitions.
[2020-07-20 17:12:22,413 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 17:12:22,414 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 20
[2020-07-20 17:12:22,414 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:12:22,416 INFO  L225             Difference]: With dead ends: 117
[2020-07-20 17:12:22,417 INFO  L226             Difference]: Without dead ends: 72
[2020-07-20 17:12:22,419 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 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 17:12:22,421 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 72 states.
[2020-07-20 17:12:22,431 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70.
[2020-07-20 17:12:22,431 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 70 states.
[2020-07-20 17:12:22,433 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 125 transitions.
[2020-07-20 17:12:22,434 INFO  L78                 Accepts]: Start accepts. Automaton has 70 states and 125 transitions. Word has length 20
[2020-07-20 17:12:22,435 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:12:22,435 INFO  L479      AbstractCegarLoop]: Abstraction has 70 states and 125 transitions.
[2020-07-20 17:12:22,435 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 17:12:22,436 INFO  L276                IsEmpty]: Start isEmpty. Operand 70 states and 125 transitions.
[2020-07-20 17:12:22,437 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-07-20 17:12:22,437 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:12:22,437 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 17:12:22,652 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:22,654 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:12:22,654 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:12:22,655 INFO  L82        PathProgramCache]: Analyzing trace with hash 1627225809, now seen corresponding path program 1 times
[2020-07-20 17:12:22,656 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:12:22,657 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165032658]
[2020-07-20 17:12:22,657 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 17:12:22,722 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 17:12:22,723 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:12:22,724 INFO  L263         TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 17:12:22,727 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:12:22,745 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 17:12:22,749 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 17:12:22,750 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165032658]
[2020-07-20 17:12:22,750 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 17:12:22,751 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 17:12:22,751 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904641413]
[2020-07-20 17:12:22,752 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 17:12:22,752 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:12:22,752 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 17:12:22,753 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 17:12:22,753 INFO  L87              Difference]: Start difference. First operand 70 states and 125 transitions. Second operand 3 states.
[2020-07-20 17:12:22,782 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:12:22,783 INFO  L93              Difference]: Finished difference Result 108 states and 189 transitions.
[2020-07-20 17:12:22,785 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 17:12:22,785 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 21
[2020-07-20 17:12:22,786 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:12:22,787 INFO  L225             Difference]: With dead ends: 108
[2020-07-20 17:12:22,788 INFO  L226             Difference]: Without dead ends: 75
[2020-07-20 17:12:22,789 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 17:12:22,790 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 75 states.
[2020-07-20 17:12:22,801 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73.
[2020-07-20 17:12:22,802 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 73 states.
[2020-07-20 17:12:22,805 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 127 transitions.
[2020-07-20 17:12:22,806 INFO  L78                 Accepts]: Start accepts. Automaton has 73 states and 127 transitions. Word has length 21
[2020-07-20 17:12:22,806 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:12:22,806 INFO  L479      AbstractCegarLoop]: Abstraction has 73 states and 127 transitions.
[2020-07-20 17:12:22,806 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 17:12:22,807 INFO  L276                IsEmpty]: Start isEmpty. Operand 73 states and 127 transitions.
[2020-07-20 17:12:22,808 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-07-20 17:12:22,809 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:12:22,809 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 17:12:23,025 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:23,026 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:12:23,027 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:12:23,028 INFO  L82        PathProgramCache]: Analyzing trace with hash 616108559, now seen corresponding path program 1 times
[2020-07-20 17:12:23,029 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:12:23,029 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001247155]
[2020-07-20 17:12:23,030 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 17:12:23,125 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 17:12:23,126 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:12:23,128 INFO  L263         TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 17:12:23,135 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:12:23,160 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 17:12:23,161 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 17:12:23,162 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001247155]
[2020-07-20 17:12:23,163 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 17:12:23,163 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 17:12:23,163 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772892519]
[2020-07-20 17:12:23,165 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 17:12:23,166 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:12:23,167 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 17:12:23,167 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 17:12:23,168 INFO  L87              Difference]: Start difference. First operand 73 states and 127 transitions. Second operand 3 states.
[2020-07-20 17:12:23,231 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:12:23,232 INFO  L93              Difference]: Finished difference Result 136 states and 240 transitions.
[2020-07-20 17:12:23,235 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 17:12:23,236 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 21
[2020-07-20 17:12:23,236 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:12:23,239 INFO  L225             Difference]: With dead ends: 136
[2020-07-20 17:12:23,240 INFO  L226             Difference]: Without dead ends: 134
[2020-07-20 17:12:23,241 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 17:12:23,245 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 134 states.
[2020-07-20 17:12:23,274 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 96.
[2020-07-20 17:12:23,275 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 96 states.
[2020-07-20 17:12:23,277 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 168 transitions.
[2020-07-20 17:12:23,278 INFO  L78                 Accepts]: Start accepts. Automaton has 96 states and 168 transitions. Word has length 21
[2020-07-20 17:12:23,278 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:12:23,279 INFO  L479      AbstractCegarLoop]: Abstraction has 96 states and 168 transitions.
[2020-07-20 17:12:23,279 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 17:12:23,279 INFO  L276                IsEmpty]: Start isEmpty. Operand 96 states and 168 transitions.
[2020-07-20 17:12:23,280 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-07-20 17:12:23,280 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:12:23,281 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 17:12:23,487 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:23,488 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:12:23,488 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:12:23,489 INFO  L82        PathProgramCache]: Analyzing trace with hash 29302545, now seen corresponding path program 1 times
[2020-07-20 17:12:23,490 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:12:23,490 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373889285]
[2020-07-20 17:12:23,491 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 17:12:23,567 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 17:12:23,568 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:12:23,570 INFO  L263         TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 17:12:23,572 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:12:23,584 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 17:12:23,585 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 17:12:23,585 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373889285]
[2020-07-20 17:12:23,586 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 17:12:23,586 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 17:12:23,586 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700468208]
[2020-07-20 17:12:23,587 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 17:12:23,587 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:12:23,587 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 17:12:23,588 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 17:12:23,588 INFO  L87              Difference]: Start difference. First operand 96 states and 168 transitions. Second operand 3 states.
[2020-07-20 17:12:23,632 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:12:23,633 INFO  L93              Difference]: Finished difference Result 224 states and 398 transitions.
[2020-07-20 17:12:23,633 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 17:12:23,633 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 21
[2020-07-20 17:12:23,634 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:12:23,635 INFO  L225             Difference]: With dead ends: 224
[2020-07-20 17:12:23,635 INFO  L226             Difference]: Without dead ends: 136
[2020-07-20 17:12:23,637 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 17:12:23,638 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 136 states.
[2020-07-20 17:12:23,650 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134.
[2020-07-20 17:12:23,651 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 134 states.
[2020-07-20 17:12:23,653 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 234 transitions.
[2020-07-20 17:12:23,654 INFO  L78                 Accepts]: Start accepts. Automaton has 134 states and 234 transitions. Word has length 21
[2020-07-20 17:12:23,654 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:12:23,654 INFO  L479      AbstractCegarLoop]: Abstraction has 134 states and 234 transitions.
[2020-07-20 17:12:23,655 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 17:12:23,655 INFO  L276                IsEmpty]: Start isEmpty. Operand 134 states and 234 transitions.
[2020-07-20 17:12:23,656 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2020-07-20 17:12:23,657 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:12:23,657 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, 1]
[2020-07-20 17:12:23,867 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:23,870 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:12:23,870 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:12:23,871 INFO  L82        PathProgramCache]: Analyzing trace with hash 1919709866, now seen corresponding path program 1 times
[2020-07-20 17:12:23,871 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:12:23,872 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664853447]
[2020-07-20 17:12:23,872 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 17:12:23,925 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 17:12:23,925 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:12:23,927 INFO  L263         TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 17:12:23,929 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:12:23,945 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 17:12:23,946 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 17:12:23,946 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664853447]
[2020-07-20 17:12:23,947 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 17:12:23,948 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 17:12:23,948 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765141619]
[2020-07-20 17:12:23,949 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 17:12:23,952 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:12:23,952 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 17:12:23,953 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 17:12:23,954 INFO  L87              Difference]: Start difference. First operand 134 states and 234 transitions. Second operand 3 states.
[2020-07-20 17:12:23,988 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:12:23,989 INFO  L93              Difference]: Finished difference Result 201 states and 349 transitions.
[2020-07-20 17:12:23,989 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 17:12:23,990 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 22
[2020-07-20 17:12:23,990 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:12:23,993 INFO  L225             Difference]: With dead ends: 201
[2020-07-20 17:12:23,993 INFO  L226             Difference]: Without dead ends: 138
[2020-07-20 17:12:23,994 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 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 17:12:23,995 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 138 states.
[2020-07-20 17:12:24,005 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136.
[2020-07-20 17:12:24,006 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 136 states.
[2020-07-20 17:12:24,008 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 234 transitions.
[2020-07-20 17:12:24,009 INFO  L78                 Accepts]: Start accepts. Automaton has 136 states and 234 transitions. Word has length 22
[2020-07-20 17:12:24,009 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:12:24,009 INFO  L479      AbstractCegarLoop]: Abstraction has 136 states and 234 transitions.
[2020-07-20 17:12:24,010 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 17:12:24,010 INFO  L276                IsEmpty]: Start isEmpty. Operand 136 states and 234 transitions.
[2020-07-20 17:12:24,011 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2020-07-20 17:12:24,011 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:12:24,012 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, 1]
[2020-07-20 17:12:24,226 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:24,227 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:12:24,228 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:12:24,229 INFO  L82        PathProgramCache]: Analyzing trace with hash 908592616, now seen corresponding path program 1 times
[2020-07-20 17:12:24,229 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:12:24,230 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233908092]
[2020-07-20 17:12:24,230 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 17:12:24,287 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 17:12:24,287 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:12:24,289 INFO  L263         TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 17:12:24,301 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:12:24,320 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 17:12:24,320 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 17:12:24,321 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233908092]
[2020-07-20 17:12:24,322 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 17:12:24,322 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 17:12:24,322 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348364626]
[2020-07-20 17:12:24,323 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 17:12:24,324 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:12:24,325 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 17:12:24,325 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 17:12:24,326 INFO  L87              Difference]: Start difference. First operand 136 states and 234 transitions. Second operand 3 states.
[2020-07-20 17:12:24,364 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:12:24,364 INFO  L93              Difference]: Finished difference Result 252 states and 440 transitions.
[2020-07-20 17:12:24,365 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 17:12:24,365 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 22
[2020-07-20 17:12:24,366 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:12:24,368 INFO  L225             Difference]: With dead ends: 252
[2020-07-20 17:12:24,369 INFO  L226             Difference]: Without dead ends: 250
[2020-07-20 17:12:24,370 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 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 17:12:24,372 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 250 states.
[2020-07-20 17:12:24,386 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 184.
[2020-07-20 17:12:24,386 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 184 states.
[2020-07-20 17:12:24,389 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 314 transitions.
[2020-07-20 17:12:24,389 INFO  L78                 Accepts]: Start accepts. Automaton has 184 states and 314 transitions. Word has length 22
[2020-07-20 17:12:24,390 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:12:24,390 INFO  L479      AbstractCegarLoop]: Abstraction has 184 states and 314 transitions.
[2020-07-20 17:12:24,390 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 17:12:24,391 INFO  L276                IsEmpty]: Start isEmpty. Operand 184 states and 314 transitions.
[2020-07-20 17:12:24,393 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2020-07-20 17:12:24,393 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:12:24,393 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, 1]
[2020-07-20 17:12:24,609 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:24,610 INFO  L427      AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:12:24,610 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:12:24,611 INFO  L82        PathProgramCache]: Analyzing trace with hash 321786602, now seen corresponding path program 1 times
[2020-07-20 17:12:24,612 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:12:24,612 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133458496]
[2020-07-20 17:12:24,612 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 17:12:24,662 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 17:12:24,663 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:12:24,665 INFO  L263         TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 17:12:24,667 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:12:24,686 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 17:12:24,687 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 17:12:24,687 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133458496]
[2020-07-20 17:12:24,687 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 17:12:24,688 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 17:12:24,688 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607525225]
[2020-07-20 17:12:24,688 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 17:12:24,688 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:12:24,689 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 17:12:24,689 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 17:12:24,689 INFO  L87              Difference]: Start difference. First operand 184 states and 314 transitions. Second operand 3 states.
[2020-07-20 17:12:24,733 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:12:24,734 INFO  L93              Difference]: Finished difference Result 432 states and 744 transitions.
[2020-07-20 17:12:24,734 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 17:12:24,735 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 22
[2020-07-20 17:12:24,735 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:12:24,737 INFO  L225             Difference]: With dead ends: 432
[2020-07-20 17:12:24,738 INFO  L226             Difference]: Without dead ends: 258
[2020-07-20 17:12:24,744 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 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 17:12:24,746 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 258 states.
[2020-07-20 17:12:24,765 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256.
[2020-07-20 17:12:24,766 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 256 states.
[2020-07-20 17:12:24,769 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 434 transitions.
[2020-07-20 17:12:24,769 INFO  L78                 Accepts]: Start accepts. Automaton has 256 states and 434 transitions. Word has length 22
[2020-07-20 17:12:24,770 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:12:24,770 INFO  L479      AbstractCegarLoop]: Abstraction has 256 states and 434 transitions.
[2020-07-20 17:12:24,770 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 17:12:24,770 INFO  L276                IsEmpty]: Start isEmpty. Operand 256 states and 434 transitions.
[2020-07-20 17:12:24,772 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-07-20 17:12:24,773 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:12:24,773 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, 1, 1]
[2020-07-20 17:12:24,987 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:24,988 INFO  L427      AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:12:24,989 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:12:24,989 INFO  L82        PathProgramCache]: Analyzing trace with hash -1898185914, now seen corresponding path program 1 times
[2020-07-20 17:12:24,990 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:12:24,991 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495934584]
[2020-07-20 17:12:24,991 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:25,042 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 17:12:25,043 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:12:25,043 INFO  L263         TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 17:12:25,046 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:12:25,066 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 17:12:25,067 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 17:12:25,067 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495934584]
[2020-07-20 17:12:25,068 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 17:12:25,068 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 17:12:25,068 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900078579]
[2020-07-20 17:12:25,069 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 17:12:25,069 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:12:25,070 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 17:12:25,070 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 17:12:25,071 INFO  L87              Difference]: Start difference. First operand 256 states and 434 transitions. Second operand 3 states.
[2020-07-20 17:12:25,106 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:12:25,107 INFO  L93              Difference]: Finished difference Result 384 states and 648 transitions.
[2020-07-20 17:12:25,108 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 17:12:25,108 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 23
[2020-07-20 17:12:25,109 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:12:25,112 INFO  L225             Difference]: With dead ends: 384
[2020-07-20 17:12:25,113 INFO  L226             Difference]: Without dead ends: 262
[2020-07-20 17:12:25,115 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 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 17:12:25,116 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 262 states.
[2020-07-20 17:12:25,131 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260.
[2020-07-20 17:12:25,132 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 260 states.
[2020-07-20 17:12:25,134 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 434 transitions.
[2020-07-20 17:12:25,135 INFO  L78                 Accepts]: Start accepts. Automaton has 260 states and 434 transitions. Word has length 23
[2020-07-20 17:12:25,136 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:12:25,136 INFO  L479      AbstractCegarLoop]: Abstraction has 260 states and 434 transitions.
[2020-07-20 17:12:25,136 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 17:12:25,137 INFO  L276                IsEmpty]: Start isEmpty. Operand 260 states and 434 transitions.
[2020-07-20 17:12:25,139 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-07-20 17:12:25,139 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:12:25,139 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, 1, 1]
[2020-07-20 17:12:25,354 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:25,356 INFO  L427      AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:12:25,356 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:12:25,357 INFO  L82        PathProgramCache]: Analyzing trace with hash 1385664132, now seen corresponding path program 1 times
[2020-07-20 17:12:25,357 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:12:25,358 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58562815]
[2020-07-20 17:12:25,358 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:25,422 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 17:12:25,423 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:12:25,425 INFO  L263         TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 17:12:25,427 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:12:25,436 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 17:12:25,437 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 17:12:25,437 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58562815]
[2020-07-20 17:12:25,438 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 17:12:25,438 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 17:12:25,439 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887301579]
[2020-07-20 17:12:25,439 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 17:12:25,440 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:12:25,440 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 17:12:25,440 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 17:12:25,440 INFO  L87              Difference]: Start difference. First operand 260 states and 434 transitions. Second operand 3 states.
[2020-07-20 17:12:25,472 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:12:25,472 INFO  L93              Difference]: Finished difference Result 476 states and 808 transitions.
[2020-07-20 17:12:25,473 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 17:12:25,473 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 23
[2020-07-20 17:12:25,474 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:12:25,478 INFO  L225             Difference]: With dead ends: 476
[2020-07-20 17:12:25,478 INFO  L226             Difference]: Without dead ends: 474
[2020-07-20 17:12:25,480 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 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 17:12:25,482 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 474 states.
[2020-07-20 17:12:25,501 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 360.
[2020-07-20 17:12:25,502 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 360 states.
[2020-07-20 17:12:25,507 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 590 transitions.
[2020-07-20 17:12:25,508 INFO  L78                 Accepts]: Start accepts. Automaton has 360 states and 590 transitions. Word has length 23
[2020-07-20 17:12:25,508 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:12:25,509 INFO  L479      AbstractCegarLoop]: Abstraction has 360 states and 590 transitions.
[2020-07-20 17:12:25,509 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 17:12:25,509 INFO  L276                IsEmpty]: Start isEmpty. Operand 360 states and 590 transitions.
[2020-07-20 17:12:25,511 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-07-20 17:12:25,512 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:12:25,512 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, 1, 1]
[2020-07-20 17:12:25,716 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:25,717 INFO  L427      AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:12:25,717 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:12:25,718 INFO  L82        PathProgramCache]: Analyzing trace with hash 798858118, now seen corresponding path program 1 times
[2020-07-20 17:12:25,718 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:12:25,719 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258353016]
[2020-07-20 17:12:25,719 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:25,771 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 17:12:25,772 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:12:25,774 INFO  L263         TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 17:12:25,776 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:12:25,794 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 17:12:25,795 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 17:12:25,796 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258353016]
[2020-07-20 17:12:25,796 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 17:12:25,796 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 17:12:25,797 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890109234]
[2020-07-20 17:12:25,797 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 17:12:25,798 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:12:25,798 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 17:12:25,798 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 17:12:25,798 INFO  L87              Difference]: Start difference. First operand 360 states and 590 transitions. Second operand 3 states.
[2020-07-20 17:12:25,852 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:12:25,853 INFO  L93              Difference]: Finished difference Result 844 states and 1392 transitions.
[2020-07-20 17:12:25,853 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 17:12:25,853 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 23
[2020-07-20 17:12:25,854 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:12:25,859 INFO  L225             Difference]: With dead ends: 844
[2020-07-20 17:12:25,859 INFO  L226             Difference]: Without dead ends: 498
[2020-07-20 17:12:25,861 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 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 17:12:25,863 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 498 states.
[2020-07-20 17:12:25,883 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 496.
[2020-07-20 17:12:25,884 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 496 states.
[2020-07-20 17:12:25,888 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 806 transitions.
[2020-07-20 17:12:25,888 INFO  L78                 Accepts]: Start accepts. Automaton has 496 states and 806 transitions. Word has length 23
[2020-07-20 17:12:25,889 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:12:25,889 INFO  L479      AbstractCegarLoop]: Abstraction has 496 states and 806 transitions.
[2020-07-20 17:12:25,889 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 17:12:25,889 INFO  L276                IsEmpty]: Start isEmpty. Operand 496 states and 806 transitions.
[2020-07-20 17:12:25,890 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2020-07-20 17:12:25,891 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:12:25,891 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, 1, 1, 1]
[2020-07-20 17:12:26,106 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:26,107 INFO  L427      AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:12:26,108 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:12:26,108 INFO  L82        PathProgramCache]: Analyzing trace with hash 6129535, now seen corresponding path program 1 times
[2020-07-20 17:12:26,109 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:12:26,109 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816717399]
[2020-07-20 17:12:26,110 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 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:26,193 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 17:12:26,193 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:12:26,194 INFO  L263         TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 17:12:26,209 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:12:26,230 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 17:12:26,232 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 17:12:26,233 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816717399]
[2020-07-20 17:12:26,234 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 17:12:26,234 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 17:12:26,234 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385063273]
[2020-07-20 17:12:26,235 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 17:12:26,235 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:12:26,235 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 17:12:26,236 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 17:12:26,236 INFO  L87              Difference]: Start difference. First operand 496 states and 806 transitions. Second operand 3 states.
[2020-07-20 17:12:26,279 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:12:26,279 INFO  L93              Difference]: Finished difference Result 744 states and 1204 transitions.
[2020-07-20 17:12:26,280 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 17:12:26,280 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 24
[2020-07-20 17:12:26,281 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:12:26,286 INFO  L225             Difference]: With dead ends: 744
[2020-07-20 17:12:26,287 INFO  L226             Difference]: Without dead ends: 506
[2020-07-20 17:12:26,288 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 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 17:12:26,292 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 506 states.
[2020-07-20 17:12:26,314 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 504.
[2020-07-20 17:12:26,315 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 504 states.
[2020-07-20 17:12:26,318 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 806 transitions.
[2020-07-20 17:12:26,319 INFO  L78                 Accepts]: Start accepts. Automaton has 504 states and 806 transitions. Word has length 24
[2020-07-20 17:12:26,320 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:12:26,320 INFO  L479      AbstractCegarLoop]: Abstraction has 504 states and 806 transitions.
[2020-07-20 17:12:26,320 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 17:12:26,321 INFO  L276                IsEmpty]: Start isEmpty. Operand 504 states and 806 transitions.
[2020-07-20 17:12:26,322 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2020-07-20 17:12:26,322 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:12:26,323 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, 1, 1, 1]
[2020-07-20 17:12:26,538 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:26,539 INFO  L427      AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:12:26,539 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:12:26,539 INFO  L82        PathProgramCache]: Analyzing trace with hash -1004987715, now seen corresponding path program 1 times
[2020-07-20 17:12:26,540 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:12:26,540 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592912812]
[2020-07-20 17:12:26,541 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 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:26,595 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 17:12:26,595 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:12:26,597 INFO  L263         TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 17:12:26,600 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:12:26,611 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 17:12:26,612 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 17:12:26,612 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592912812]
[2020-07-20 17:12:26,613 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 17:12:26,613 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 17:12:26,613 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314697324]
[2020-07-20 17:12:26,614 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 17:12:26,615 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:12:26,615 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 17:12:26,616 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 17:12:26,616 INFO  L87              Difference]: Start difference. First operand 504 states and 806 transitions. Second operand 3 states.
[2020-07-20 17:12:26,656 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:12:26,656 INFO  L93              Difference]: Finished difference Result 908 states and 1480 transitions.
[2020-07-20 17:12:26,657 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 17:12:26,657 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 24
[2020-07-20 17:12:26,658 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:12:26,666 INFO  L225             Difference]: With dead ends: 908
[2020-07-20 17:12:26,667 INFO  L226             Difference]: Without dead ends: 906
[2020-07-20 17:12:26,668 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 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 17:12:26,670 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 906 states.
[2020-07-20 17:12:26,697 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 712.
[2020-07-20 17:12:26,698 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 712 states.
[2020-07-20 17:12:26,703 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1110 transitions.
[2020-07-20 17:12:26,703 INFO  L78                 Accepts]: Start accepts. Automaton has 712 states and 1110 transitions. Word has length 24
[2020-07-20 17:12:26,704 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:12:26,704 INFO  L479      AbstractCegarLoop]: Abstraction has 712 states and 1110 transitions.
[2020-07-20 17:12:26,704 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 17:12:26,704 INFO  L276                IsEmpty]: Start isEmpty. Operand 712 states and 1110 transitions.
[2020-07-20 17:12:26,706 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2020-07-20 17:12:26,706 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:12:26,706 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, 1, 1, 1]
[2020-07-20 17:12:26,921 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:26,921 INFO  L427      AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:12:26,922 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:12:26,922 INFO  L82        PathProgramCache]: Analyzing trace with hash -1591793729, now seen corresponding path program 1 times
[2020-07-20 17:12:26,923 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:12:26,923 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191433824]
[2020-07-20 17:12:26,924 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 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:27,003 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 17:12:27,004 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:12:27,006 INFO  L263         TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 17:12:27,009 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:12:27,023 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 17:12:27,024 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 17:12:27,027 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191433824]
[2020-07-20 17:12:27,028 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 17:12:27,028 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 17:12:27,029 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793555223]
[2020-07-20 17:12:27,030 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 17:12:27,030 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:12:27,031 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 17:12:27,031 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 17:12:27,031 INFO  L87              Difference]: Start difference. First operand 712 states and 1110 transitions. Second operand 3 states.
[2020-07-20 17:12:27,091 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:12:27,091 INFO  L93              Difference]: Finished difference Result 1660 states and 2600 transitions.
[2020-07-20 17:12:27,092 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 17:12:27,093 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 24
[2020-07-20 17:12:27,093 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:12:27,103 INFO  L225             Difference]: With dead ends: 1660
[2020-07-20 17:12:27,103 INFO  L226             Difference]: Without dead ends: 970
[2020-07-20 17:12:27,108 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 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 17:12:27,112 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 970 states.
[2020-07-20 17:12:27,161 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 968.
[2020-07-20 17:12:27,161 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 968 states.
[2020-07-20 17:12:27,170 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1494 transitions.
[2020-07-20 17:12:27,171 INFO  L78                 Accepts]: Start accepts. Automaton has 968 states and 1494 transitions. Word has length 24
[2020-07-20 17:12:27,172 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:12:27,172 INFO  L479      AbstractCegarLoop]: Abstraction has 968 states and 1494 transitions.
[2020-07-20 17:12:27,172 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 17:12:27,173 INFO  L276                IsEmpty]: Start isEmpty. Operand 968 states and 1494 transitions.
[2020-07-20 17:12:27,176 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2020-07-20 17:12:27,177 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:12:27,177 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, 1, 1, 1, 1]
[2020-07-20 17:12:27,382 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:27,383 INFO  L427      AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:12:27,384 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:12:27,384 INFO  L82        PathProgramCache]: Analyzing trace with hash -1089633349, now seen corresponding path program 1 times
[2020-07-20 17:12:27,385 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:12:27,386 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59343398]
[2020-07-20 17:12:27,386 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 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:27,475 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 17:12:27,476 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:12:27,480 INFO  L263         TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 17:12:27,482 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:12:27,506 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 17:12:27,507 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 17:12:27,510 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59343398]
[2020-07-20 17:12:27,510 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 17:12:27,510 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 17:12:27,511 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287003690]
[2020-07-20 17:12:27,511 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 17:12:27,511 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:12:27,512 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 17:12:27,512 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 17:12:27,512 INFO  L87              Difference]: Start difference. First operand 968 states and 1494 transitions. Second operand 3 states.
[2020-07-20 17:12:27,554 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:12:27,554 INFO  L93              Difference]: Finished difference Result 1452 states and 2232 transitions.
[2020-07-20 17:12:27,555 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 17:12:27,555 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 25
[2020-07-20 17:12:27,556 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:12:27,564 INFO  L225             Difference]: With dead ends: 1452
[2020-07-20 17:12:27,564 INFO  L226             Difference]: Without dead ends: 986
[2020-07-20 17:12:27,570 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 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 17:12:27,573 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 986 states.
[2020-07-20 17:12:27,614 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 984.
[2020-07-20 17:12:27,615 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 984 states.
[2020-07-20 17:12:27,626 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1494 transitions.
[2020-07-20 17:12:27,627 INFO  L78                 Accepts]: Start accepts. Automaton has 984 states and 1494 transitions. Word has length 25
[2020-07-20 17:12:27,629 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:12:27,629 INFO  L479      AbstractCegarLoop]: Abstraction has 984 states and 1494 transitions.
[2020-07-20 17:12:27,630 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 17:12:27,631 INFO  L276                IsEmpty]: Start isEmpty. Operand 984 states and 1494 transitions.
[2020-07-20 17:12:27,633 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2020-07-20 17:12:27,633 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:12:27,633 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, 1, 1, 1, 1]
[2020-07-20 17:12:27,850 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:27,851 INFO  L427      AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:12:27,852 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:12:27,852 INFO  L82        PathProgramCache]: Analyzing trace with hash -2100750599, now seen corresponding path program 1 times
[2020-07-20 17:12:27,853 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:12:27,854 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466607291]
[2020-07-20 17:12:27,855 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 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:27,922 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 17:12:27,923 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:12:27,925 INFO  L263         TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 17:12:27,933 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:12:27,945 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 17:12:27,946 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 17:12:27,946 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466607291]
[2020-07-20 17:12:27,947 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 17:12:27,947 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 17:12:27,953 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488670827]
[2020-07-20 17:12:27,954 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 17:12:27,954 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:12:27,955 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 17:12:27,957 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 17:12:27,958 INFO  L87              Difference]: Start difference. First operand 984 states and 1494 transitions. Second operand 3 states.
[2020-07-20 17:12:28,019 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:12:28,020 INFO  L93              Difference]: Finished difference Result 1740 states and 2696 transitions.
[2020-07-20 17:12:28,021 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 17:12:28,021 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 25
[2020-07-20 17:12:28,022 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:12:28,034 INFO  L225             Difference]: With dead ends: 1740
[2020-07-20 17:12:28,035 INFO  L226             Difference]: Without dead ends: 1738
[2020-07-20 17:12:28,037 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 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 17:12:28,044 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1738 states.
[2020-07-20 17:12:28,102 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1416.
[2020-07-20 17:12:28,103 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1416 states.
[2020-07-20 17:12:28,112 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2086 transitions.
[2020-07-20 17:12:28,112 INFO  L78                 Accepts]: Start accepts. Automaton has 1416 states and 2086 transitions. Word has length 25
[2020-07-20 17:12:28,112 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:12:28,113 INFO  L479      AbstractCegarLoop]: Abstraction has 1416 states and 2086 transitions.
[2020-07-20 17:12:28,113 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 17:12:28,113 INFO  L276                IsEmpty]: Start isEmpty. Operand 1416 states and 2086 transitions.
[2020-07-20 17:12:28,116 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2020-07-20 17:12:28,117 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:12:28,117 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, 1, 1, 1, 1]
[2020-07-20 17:12:28,332 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:28,332 INFO  L427      AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:12:28,332 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:12:28,333 INFO  L82        PathProgramCache]: Analyzing trace with hash 1607410683, now seen corresponding path program 1 times
[2020-07-20 17:12:28,333 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:12:28,333 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374033364]
[2020-07-20 17:12:28,333 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 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:28,413 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 17:12:28,413 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:12:28,415 INFO  L263         TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 17:12:28,417 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:12:28,424 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 17:12:28,425 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 17:12:28,425 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374033364]
[2020-07-20 17:12:28,426 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 17:12:28,426 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 17:12:28,426 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061156212]
[2020-07-20 17:12:28,427 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 17:12:28,428 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:12:28,428 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 17:12:28,428 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 17:12:28,428 INFO  L87              Difference]: Start difference. First operand 1416 states and 2086 transitions. Second operand 3 states.
[2020-07-20 17:12:28,499 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:12:28,500 INFO  L93              Difference]: Finished difference Result 3276 states and 4840 transitions.
[2020-07-20 17:12:28,500 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 17:12:28,501 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 25
[2020-07-20 17:12:28,501 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:12:28,516 INFO  L225             Difference]: With dead ends: 3276
[2020-07-20 17:12:28,517 INFO  L226             Difference]: Without dead ends: 1898
[2020-07-20 17:12:28,523 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 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 17:12:28,526 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1898 states.
[2020-07-20 17:12:28,604 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1896.
[2020-07-20 17:12:28,605 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1896 states.
[2020-07-20 17:12:28,616 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2758 transitions.
[2020-07-20 17:12:28,618 INFO  L78                 Accepts]: Start accepts. Automaton has 1896 states and 2758 transitions. Word has length 25
[2020-07-20 17:12:28,618 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:12:28,618 INFO  L479      AbstractCegarLoop]: Abstraction has 1896 states and 2758 transitions.
[2020-07-20 17:12:28,619 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 17:12:28,619 INFO  L276                IsEmpty]: Start isEmpty. Operand 1896 states and 2758 transitions.
[2020-07-20 17:12:28,624 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2020-07-20 17:12:28,624 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:12:28,624 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, 1, 1, 1, 1, 1]
[2020-07-20 17:12:28,838 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:28,839 INFO  L427      AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:12:28,839 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:12:28,840 INFO  L82        PathProgramCache]: Analyzing trace with hash -698544044, now seen corresponding path program 1 times
[2020-07-20 17:12:28,840 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:12:28,840 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443831793]
[2020-07-20 17:12:28,840 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 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:28,898 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 17:12:28,898 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:12:28,900 INFO  L263         TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 17:12:28,908 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:12:28,923 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 17:12:28,924 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 17:12:28,925 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443831793]
[2020-07-20 17:12:28,925 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 17:12:28,925 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 17:12:28,926 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128775136]
[2020-07-20 17:12:28,927 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 17:12:28,928 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:12:28,928 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 17:12:28,928 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 17:12:28,929 INFO  L87              Difference]: Start difference. First operand 1896 states and 2758 transitions. Second operand 3 states.
[2020-07-20 17:12:28,990 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:12:28,991 INFO  L93              Difference]: Finished difference Result 2844 states and 4120 transitions.
[2020-07-20 17:12:28,991 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 17:12:28,991 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 26
[2020-07-20 17:12:28,992 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:12:29,008 INFO  L225             Difference]: With dead ends: 2844
[2020-07-20 17:12:29,008 INFO  L226             Difference]: Without dead ends: 1930
[2020-07-20 17:12:29,012 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 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 17:12:29,017 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1930 states.
[2020-07-20 17:12:29,094 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1928.
[2020-07-20 17:12:29,095 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1928 states.
[2020-07-20 17:12:29,108 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 2758 transitions.
[2020-07-20 17:12:29,108 INFO  L78                 Accepts]: Start accepts. Automaton has 1928 states and 2758 transitions. Word has length 26
[2020-07-20 17:12:29,109 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:12:29,109 INFO  L479      AbstractCegarLoop]: Abstraction has 1928 states and 2758 transitions.
[2020-07-20 17:12:29,109 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 17:12:29,109 INFO  L276                IsEmpty]: Start isEmpty. Operand 1928 states and 2758 transitions.
[2020-07-20 17:12:29,114 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2020-07-20 17:12:29,114 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:12:29,114 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, 1, 1, 1, 1, 1]
[2020-07-20 17:12:29,329 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:29,330 INFO  L427      AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:12:29,330 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:12:29,331 INFO  L82        PathProgramCache]: Analyzing trace with hash -1709661294, now seen corresponding path program 1 times
[2020-07-20 17:12:29,331 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:12:29,332 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502802857]
[2020-07-20 17:12:29,332 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 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:29,391 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 17:12:29,392 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:12:29,394 INFO  L263         TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 17:12:29,395 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:12:29,404 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 17:12:29,404 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 17:12:29,405 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502802857]
[2020-07-20 17:12:29,405 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 17:12:29,405 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 17:12:29,406 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432084191]
[2020-07-20 17:12:29,406 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 17:12:29,407 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:12:29,407 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 17:12:29,407 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 17:12:29,407 INFO  L87              Difference]: Start difference. First operand 1928 states and 2758 transitions. Second operand 3 states.
[2020-07-20 17:12:29,489 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:12:29,489 INFO  L93              Difference]: Finished difference Result 3340 states and 4872 transitions.
[2020-07-20 17:12:29,490 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 17:12:29,491 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 26
[2020-07-20 17:12:29,491 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:12:29,516 INFO  L225             Difference]: With dead ends: 3340
[2020-07-20 17:12:29,516 INFO  L226             Difference]: Without dead ends: 3338
[2020-07-20 17:12:29,519 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 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 17:12:29,526 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3338 states.
[2020-07-20 17:12:29,637 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2824.
[2020-07-20 17:12:29,637 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2824 states.
[2020-07-20 17:12:29,722 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 3910 transitions.
[2020-07-20 17:12:29,723 INFO  L78                 Accepts]: Start accepts. Automaton has 2824 states and 3910 transitions. Word has length 26
[2020-07-20 17:12:29,723 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:12:29,724 INFO  L479      AbstractCegarLoop]: Abstraction has 2824 states and 3910 transitions.
[2020-07-20 17:12:29,724 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 17:12:29,724 INFO  L276                IsEmpty]: Start isEmpty. Operand 2824 states and 3910 transitions.
[2020-07-20 17:12:29,732 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2020-07-20 17:12:29,733 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:12:29,733 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, 1, 1, 1, 1, 1]
[2020-07-20 17:12:29,934 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:29,935 INFO  L427      AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:12:29,935 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:12:29,936 INFO  L82        PathProgramCache]: Analyzing trace with hash 1998499988, now seen corresponding path program 1 times
[2020-07-20 17:12:29,936 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:12:29,936 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636875767]
[2020-07-20 17:12:29,936 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 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:29,980 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 17:12:29,981 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:12:29,982 INFO  L263         TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 17:12:29,983 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:12:29,994 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 17:12:29,995 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 17:12:29,996 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636875767]
[2020-07-20 17:12:29,996 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 17:12:29,996 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 17:12:29,997 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818822716]
[2020-07-20 17:12:30,000 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 17:12:30,000 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:12:30,001 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 17:12:30,001 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 17:12:30,001 INFO  L87              Difference]: Start difference. First operand 2824 states and 3910 transitions. Second operand 3 states.
[2020-07-20 17:12:30,106 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:12:30,106 INFO  L93              Difference]: Finished difference Result 6476 states and 8968 transitions.
[2020-07-20 17:12:30,107 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 17:12:30,107 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 26
[2020-07-20 17:12:30,107 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:12:30,135 INFO  L225             Difference]: With dead ends: 6476
[2020-07-20 17:12:30,136 INFO  L226             Difference]: Without dead ends: 3722
[2020-07-20 17:12:30,145 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 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 17:12:30,152 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3722 states.
[2020-07-20 17:12:30,326 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3720.
[2020-07-20 17:12:30,327 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3720 states.
[2020-07-20 17:12:30,347 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 5062 transitions.
[2020-07-20 17:12:30,348 INFO  L78                 Accepts]: Start accepts. Automaton has 3720 states and 5062 transitions. Word has length 26
[2020-07-20 17:12:30,348 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:12:30,349 INFO  L479      AbstractCegarLoop]: Abstraction has 3720 states and 5062 transitions.
[2020-07-20 17:12:30,349 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 17:12:30,349 INFO  L276                IsEmpty]: Start isEmpty. Operand 3720 states and 5062 transitions.
[2020-07-20 17:12:30,358 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-07-20 17:12:30,359 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:12:30,359 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, 1, 1, 1, 1, 1, 1]
[2020-07-20 17:12:30,573 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:30,575 INFO  L427      AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:12:30,576 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:12:30,576 INFO  L82        PathProgramCache]: Analyzing trace with hash -1459677136, now seen corresponding path program 1 times
[2020-07-20 17:12:30,577 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:12:30,577 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816921000]
[2020-07-20 17:12:30,578 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 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:30,643 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 17:12:30,643 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:12:30,645 INFO  L263         TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 17:12:30,647 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:12:30,655 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 17:12:30,656 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 17:12:30,657 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816921000]
[2020-07-20 17:12:30,657 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 17:12:30,657 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 17:12:30,657 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708453320]
[2020-07-20 17:12:30,658 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 17:12:30,658 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:12:30,658 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 17:12:30,658 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 17:12:30,659 INFO  L87              Difference]: Start difference. First operand 3720 states and 5062 transitions. Second operand 3 states.
[2020-07-20 17:12:30,748 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:12:30,748 INFO  L93              Difference]: Finished difference Result 5580 states and 7560 transitions.
[2020-07-20 17:12:30,749 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 17:12:30,749 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 27
[2020-07-20 17:12:30,749 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:12:30,775 INFO  L225             Difference]: With dead ends: 5580
[2020-07-20 17:12:30,775 INFO  L226             Difference]: Without dead ends: 3786
[2020-07-20 17:12:30,783 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 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 17:12:30,790 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3786 states.
[2020-07-20 17:12:30,917 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 3784.
[2020-07-20 17:12:30,917 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3784 states.
[2020-07-20 17:12:30,933 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 5062 transitions.
[2020-07-20 17:12:30,934 INFO  L78                 Accepts]: Start accepts. Automaton has 3784 states and 5062 transitions. Word has length 27
[2020-07-20 17:12:30,935 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:12:30,935 INFO  L479      AbstractCegarLoop]: Abstraction has 3784 states and 5062 transitions.
[2020-07-20 17:12:30,935 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 17:12:30,935 INFO  L276                IsEmpty]: Start isEmpty. Operand 3784 states and 5062 transitions.
[2020-07-20 17:12:30,943 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-07-20 17:12:30,944 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:12:30,944 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, 1, 1, 1, 1, 1, 1]
[2020-07-20 17:12:31,160 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:31,160 INFO  L427      AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:12:31,160 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:12:31,161 INFO  L82        PathProgramCache]: Analyzing trace with hash 1824172910, now seen corresponding path program 1 times
[2020-07-20 17:12:31,161 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:12:31,161 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635881440]
[2020-07-20 17:12:31,161 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 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:31,211 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 17:12:31,212 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:12:31,213 INFO  L263         TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 17:12:31,215 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:12:31,224 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 17:12:31,224 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 17:12:31,224 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635881440]
[2020-07-20 17:12:31,225 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 17:12:31,225 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 17:12:31,225 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867029817]
[2020-07-20 17:12:31,226 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 17:12:31,226 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:12:31,226 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 17:12:31,227 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 17:12:31,227 INFO  L87              Difference]: Start difference. First operand 3784 states and 5062 transitions. Second operand 3 states.
[2020-07-20 17:12:31,446 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:12:31,448 INFO  L93              Difference]: Finished difference Result 10956 states and 14408 transitions.
[2020-07-20 17:12:31,449 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 17:12:31,449 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 27
[2020-07-20 17:12:31,450 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:12:31,514 INFO  L225             Difference]: With dead ends: 10956
[2020-07-20 17:12:31,515 INFO  L226             Difference]: Without dead ends: 7306
[2020-07-20 17:12:31,528 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 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 17:12:31,540 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7306 states.
[2020-07-20 17:12:31,790 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7306 to 7304.
[2020-07-20 17:12:31,791 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 7304 states.
[2020-07-20 17:12:31,818 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9350 transitions.
[2020-07-20 17:12:31,819 INFO  L78                 Accepts]: Start accepts. Automaton has 7304 states and 9350 transitions. Word has length 27
[2020-07-20 17:12:31,820 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:12:31,820 INFO  L479      AbstractCegarLoop]: Abstraction has 7304 states and 9350 transitions.
[2020-07-20 17:12:31,820 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 17:12:31,821 INFO  L276                IsEmpty]: Start isEmpty. Operand 7304 states and 9350 transitions.
[2020-07-20 17:12:31,837 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-07-20 17:12:31,838 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:12:31,838 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, 1, 1, 1, 1, 1, 1]
[2020-07-20 17:12:32,052 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:32,053 INFO  L427      AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:12:32,054 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:12:32,054 INFO  L82        PathProgramCache]: Analyzing trace with hash -1883988372, now seen corresponding path program 1 times
[2020-07-20 17:12:32,054 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:12:32,055 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534760997]
[2020-07-20 17:12:32,055 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 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:32,106 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 17:12:32,107 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:12:32,108 INFO  L263         TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 17:12:32,109 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:12:32,117 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 17:12:32,123 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 17:12:32,123 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534760997]
[2020-07-20 17:12:32,123 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 17:12:32,124 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 17:12:32,124 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142816547]
[2020-07-20 17:12:32,127 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 17:12:32,127 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:12:32,128 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 17:12:32,128 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 17:12:32,129 INFO  L87              Difference]: Start difference. First operand 7304 states and 9350 transitions. Second operand 3 states.
[2020-07-20 17:12:32,294 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:12:32,294 INFO  L93              Difference]: Finished difference Result 8076 states and 10632 transitions.
[2020-07-20 17:12:32,295 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 17:12:32,295 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 27
[2020-07-20 17:12:32,295 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:12:32,326 INFO  L225             Difference]: With dead ends: 8076
[2020-07-20 17:12:32,326 INFO  L226             Difference]: Without dead ends: 8074
[2020-07-20 17:12:32,334 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 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 17:12:32,350 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8074 states.
[2020-07-20 17:12:32,609 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 7304.
[2020-07-20 17:12:32,610 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 7304 states.
[2020-07-20 17:12:32,635 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9222 transitions.
[2020-07-20 17:12:32,636 INFO  L78                 Accepts]: Start accepts. Automaton has 7304 states and 9222 transitions. Word has length 27
[2020-07-20 17:12:32,636 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:12:32,636 INFO  L479      AbstractCegarLoop]: Abstraction has 7304 states and 9222 transitions.
[2020-07-20 17:12:32,636 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 17:12:32,636 INFO  L276                IsEmpty]: Start isEmpty. Operand 7304 states and 9222 transitions.
[2020-07-20 17:12:32,651 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 29
[2020-07-20 17:12:32,652 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:12:32,652 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, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 17:12:32,866 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:32,867 INFO  L427      AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:12:32,867 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:12:32,867 INFO  L82        PathProgramCache]: Analyzing trace with hash 715001129, now seen corresponding path program 1 times
[2020-07-20 17:12:32,868 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:12:32,868 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861860156]
[2020-07-20 17:12:32,869 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 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:32,918 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 17:12:32,918 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:12:32,919 INFO  L263         TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 17:12:32,920 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:12:32,928 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 17:12:32,928 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 17:12:32,928 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861860156]
[2020-07-20 17:12:32,928 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 17:12:32,929 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 17:12:32,929 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497013985]
[2020-07-20 17:12:32,929 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 17:12:32,930 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:12:32,931 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 17:12:32,932 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 17:12:32,932 INFO  L87              Difference]: Start difference. First operand 7304 states and 9222 transitions. Second operand 3 states.
[2020-07-20 17:12:33,132 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:12:33,132 INFO  L93              Difference]: Finished difference Result 12172 states and 15496 transitions.
[2020-07-20 17:12:33,133 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 17:12:33,133 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 28
[2020-07-20 17:12:33,133 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:12:33,173 INFO  L225             Difference]: With dead ends: 12172
[2020-07-20 17:12:33,173 INFO  L226             Difference]: Without dead ends: 12170
[2020-07-20 17:12:33,184 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 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 17:12:33,205 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12170 states.
[2020-07-20 17:12:33,672 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12170 to 11144.
[2020-07-20 17:12:33,673 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 11144 states.
[2020-07-20 17:12:33,709 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 11144 states to 11144 states and 13702 transitions.
[2020-07-20 17:12:33,710 INFO  L78                 Accepts]: Start accepts. Automaton has 11144 states and 13702 transitions. Word has length 28
[2020-07-20 17:12:33,710 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:12:33,710 INFO  L479      AbstractCegarLoop]: Abstraction has 11144 states and 13702 transitions.
[2020-07-20 17:12:33,710 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 17:12:33,710 INFO  L276                IsEmpty]: Start isEmpty. Operand 11144 states and 13702 transitions.
[2020-07-20 17:12:33,744 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 29
[2020-07-20 17:12:33,744 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:12:33,745 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, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 17:12:33,958 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:33,959 INFO  L427      AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:12:33,960 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:12:33,960 INFO  L82        PathProgramCache]: Analyzing trace with hash 128195115, now seen corresponding path program 1 times
[2020-07-20 17:12:33,960 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:12:33,960 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749560147]
[2020-07-20 17:12:33,960 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 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:34,014 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 17:12:34,015 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:12:34,016 INFO  L263         TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 17:12:34,018 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:12:34,026 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 17:12:34,026 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 17:12:34,027 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749560147]
[2020-07-20 17:12:34,027 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 17:12:34,027 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 17:12:34,027 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092834162]
[2020-07-20 17:12:34,028 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 17:12:34,028 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:12:34,028 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 17:12:34,028 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 17:12:34,029 INFO  L87              Difference]: Start difference. First operand 11144 states and 13702 transitions. Second operand 3 states.
[2020-07-20 17:12:34,315 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:12:34,316 INFO  L93              Difference]: Finished difference Result 25228 states and 30856 transitions.
[2020-07-20 17:12:34,317 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 17:12:34,317 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 28
[2020-07-20 17:12:34,317 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:12:34,371 INFO  L225             Difference]: With dead ends: 25228
[2020-07-20 17:12:34,371 INFO  L226             Difference]: Without dead ends: 14218
[2020-07-20 17:12:34,417 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 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 17:12:34,441 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14218 states.
[2020-07-20 17:12:34,988 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14218 to 14216.
[2020-07-20 17:12:34,988 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 14216 states.
[2020-07-20 17:12:35,035 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14216 states to 14216 states and 16902 transitions.
[2020-07-20 17:12:35,035 INFO  L78                 Accepts]: Start accepts. Automaton has 14216 states and 16902 transitions. Word has length 28
[2020-07-20 17:12:35,036 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:12:35,036 INFO  L479      AbstractCegarLoop]: Abstraction has 14216 states and 16902 transitions.
[2020-07-20 17:12:35,036 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 17:12:35,036 INFO  L276                IsEmpty]: Start isEmpty. Operand 14216 states and 16902 transitions.
[2020-07-20 17:12:35,064 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2020-07-20 17:12:35,064 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:12:35,064 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, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 17:12:35,278 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:35,278 INFO  L427      AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:12:35,279 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:12:35,279 INFO  L82        PathProgramCache]: Analyzing trace with hash 690414627, now seen corresponding path program 1 times
[2020-07-20 17:12:35,279 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:12:35,280 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428738858]
[2020-07-20 17:12:35,280 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 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:35,335 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 17:12:35,335 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:12:35,337 INFO  L263         TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 17:12:35,343 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:12:35,353 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 17:12:35,353 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 17:12:35,354 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428738858]
[2020-07-20 17:12:35,354 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 17:12:35,354 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 17:12:35,358 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145166441]
[2020-07-20 17:12:35,359 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 17:12:35,359 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:12:35,360 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 17:12:35,360 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 17:12:35,360 INFO  L87              Difference]: Start difference. First operand 14216 states and 16902 transitions. Second operand 3 states.
[2020-07-20 17:12:35,578 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:12:35,579 INFO  L93              Difference]: Finished difference Result 21516 states and 25608 transitions.
[2020-07-20 17:12:35,579 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 17:12:35,579 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 29
[2020-07-20 17:12:35,579 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:12:35,633 INFO  L225             Difference]: With dead ends: 21516
[2020-07-20 17:12:35,633 INFO  L226             Difference]: Without dead ends: 14602
[2020-07-20 17:12:35,666 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 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 17:12:35,686 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14602 states.
[2020-07-20 17:12:36,805 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14602 to 14600.
[2020-07-20 17:12:36,805 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 14600 states.
[2020-07-20 17:12:36,862 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14600 states to 14600 states and 17158 transitions.
[2020-07-20 17:12:36,863 INFO  L78                 Accepts]: Start accepts. Automaton has 14600 states and 17158 transitions. Word has length 29
[2020-07-20 17:12:36,864 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:12:36,864 INFO  L479      AbstractCegarLoop]: Abstraction has 14600 states and 17158 transitions.
[2020-07-20 17:12:36,864 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 17:12:36,864 INFO  L276                IsEmpty]: Start isEmpty. Operand 14600 states and 17158 transitions.
[2020-07-20 17:12:36,902 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2020-07-20 17:12:36,903 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:12:36,903 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, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 17:12:37,118 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:37,119 INFO  L427      AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:12:37,120 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:12:37,120 INFO  L82        PathProgramCache]: Analyzing trace with hash -320702623, now seen corresponding path program 1 times
[2020-07-20 17:12:37,121 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:12:37,121 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646344643]
[2020-07-20 17:12:37,121 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 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:37,165 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 17:12:37,166 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:12:37,168 INFO  L263         TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 17:12:37,169 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:12:37,182 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 17:12:37,183 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 17:12:37,183 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646344643]
[2020-07-20 17:12:37,184 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 17:12:37,184 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 17:12:37,185 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859559611]
[2020-07-20 17:12:37,185 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 17:12:37,185 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:12:37,185 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 17:12:37,186 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 17:12:37,186 INFO  L87              Difference]: Start difference. First operand 14600 states and 17158 transitions. Second operand 3 states.
[2020-07-20 17:12:37,509 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:12:37,510 INFO  L93              Difference]: Finished difference Result 23562 states and 27399 transitions.
[2020-07-20 17:12:37,510 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 17:12:37,510 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 29
[2020-07-20 17:12:37,510 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:12:37,606 INFO  L225             Difference]: With dead ends: 23562
[2020-07-20 17:12:37,607 INFO  L226             Difference]: Without dead ends: 23560
[2020-07-20 17:12:37,629 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 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 17:12:37,661 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23560 states.
[2020-07-20 17:12:38,216 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23560 to 22536.
[2020-07-20 17:12:38,216 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 22536 states.
[2020-07-20 17:12:38,280 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 22536 states to 22536 states and 25862 transitions.
[2020-07-20 17:12:38,281 INFO  L78                 Accepts]: Start accepts. Automaton has 22536 states and 25862 transitions. Word has length 29
[2020-07-20 17:12:38,281 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:12:38,281 INFO  L479      AbstractCegarLoop]: Abstraction has 22536 states and 25862 transitions.
[2020-07-20 17:12:38,281 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 17:12:38,281 INFO  L276                IsEmpty]: Start isEmpty. Operand 22536 states and 25862 transitions.
[2020-07-20 17:12:38,337 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2020-07-20 17:12:38,337 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:12:38,337 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, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 17:12:38,551 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:38,552 INFO  L427      AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:12:38,552 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:12:38,553 INFO  L82        PathProgramCache]: Analyzing trace with hash -907508637, now seen corresponding path program 1 times
[2020-07-20 17:12:38,553 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:12:38,553 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157862529]
[2020-07-20 17:12:38,553 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 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:38,599 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 17:12:38,599 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:12:38,601 INFO  L263         TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 17:12:38,603 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:12:38,622 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 17:12:38,623 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 17:12:38,623 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157862529]
[2020-07-20 17:12:38,624 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 17:12:38,624 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 17:12:38,624 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899083849]
[2020-07-20 17:12:38,624 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 17:12:38,625 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:12:38,625 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 17:12:38,625 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 17:12:38,625 INFO  L87              Difference]: Start difference. First operand 22536 states and 25862 transitions. Second operand 3 states.
[2020-07-20 17:12:39,108 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:12:39,109 INFO  L93              Difference]: Finished difference Result 50184 states and 56582 transitions.
[2020-07-20 17:12:39,109 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 17:12:39,109 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 29
[2020-07-20 17:12:39,110 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:12:39,110 INFO  L225             Difference]: With dead ends: 50184
[2020-07-20 17:12:39,110 INFO  L226             Difference]: Without dead ends: 0
[2020-07-20 17:12:39,206 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 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 17:12:39,207 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2020-07-20 17:12:39,207 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2020-07-20 17:12:39,207 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 0 states.
[2020-07-20 17:12:39,207 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2020-07-20 17:12:39,208 INFO  L78                 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29
[2020-07-20 17:12:39,208 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:12:39,208 INFO  L479      AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2020-07-20 17:12:39,209 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 17:12:39,209 INFO  L276                IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2020-07-20 17:12:39,209 INFO  L282                IsEmpty]: Finished isEmpty. No accepting run.
[2020-07-20 17:12:39,425 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:12:39,429 INFO  L343    DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.
[2020-07-20 17:12:39,517 INFO  L271        CegarLoopResult]: At program point  ULTIMATE.initFINAL(line -1)  the Hoare annotation is:  true
[2020-07-20 17:12:39,517 INFO  L268        CegarLoopResult]: For program point  ULTIMATE.initEXIT(line -1)  no Hoare annotation was computed.
[2020-07-20 17:12:39,518 INFO  L268        CegarLoopResult]: For program point  ULTIMATE.startEXIT(line -1)  no Hoare annotation was computed.
[2020-07-20 17:12:39,518 INFO  L271        CegarLoopResult]: At program point  L-1(line -1)  the Hoare annotation is:  true
[2020-07-20 17:12:39,518 INFO  L271        CegarLoopResult]: At program point  ULTIMATE.startENTRY(line -1)  the Hoare annotation is:  true
[2020-07-20 17:12:39,518 INFO  L268        CegarLoopResult]: For program point  ULTIMATE.startFINAL(line -1)  no Hoare annotation was computed.
[2020-07-20 17:12:39,518 INFO  L271        CegarLoopResult]: At program point  L159(lines 5 163)  the Hoare annotation is:  true
[2020-07-20 17:12:39,519 INFO  L268        CegarLoopResult]: For program point  mainEXIT(lines 4 163)  no Hoare annotation was computed.
[2020-07-20 17:12:39,519 INFO  L268        CegarLoopResult]: For program point  L118-1(lines 39 158)  no Hoare annotation was computed.
[2020-07-20 17:12:39,519 INFO  L268        CegarLoopResult]: For program point  L143-1(lines 39 158)  no Hoare annotation was computed.
[2020-07-20 17:12:39,519 INFO  L268        CegarLoopResult]: For program point  L102-1(lines 39 158)  no Hoare annotation was computed.
[2020-07-20 17:12:39,520 INFO  L268        CegarLoopResult]: For program point  L94-1(lines 39 158)  no Hoare annotation was computed.
[2020-07-20 17:12:39,521 INFO  L268        CegarLoopResult]: For program point  L119(line 119)  no Hoare annotation was computed.
[2020-07-20 17:12:39,521 INFO  L268        CegarLoopResult]: For program point  L86-1(lines 39 158)  no Hoare annotation was computed.
[2020-07-20 17:12:39,521 INFO  L268        CegarLoopResult]: For program point  L144(line 144)  no Hoare annotation was computed.
[2020-07-20 17:12:39,521 INFO  L268        CegarLoopResult]: For program point  L78-1(lines 39 158)  no Hoare annotation was computed.
[2020-07-20 17:12:39,521 INFO  L268        CegarLoopResult]: For program point  L70-1(lines 39 158)  no Hoare annotation was computed.
[2020-07-20 17:12:39,522 INFO  L268        CegarLoopResult]: For program point  L128-1(lines 39 158)  no Hoare annotation was computed.
[2020-07-20 17:12:39,522 INFO  L271        CegarLoopResult]: At program point  L153-1(lines 39 158)  the Hoare annotation is:  true
[2020-07-20 17:12:39,522 INFO  L268        CegarLoopResult]: For program point  mainFINAL(lines 4 163)  no Hoare annotation was computed.
[2020-07-20 17:12:39,522 INFO  L268        CegarLoopResult]: For program point  L129(line 129)  no Hoare annotation was computed.
[2020-07-20 17:12:39,523 INFO  L268        CegarLoopResult]: For program point  mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 161)  no Hoare annotation was computed.
[2020-07-20 17:12:39,523 INFO  L271        CegarLoopResult]: At program point  mainENTRY(lines 4 163)  the Hoare annotation is:  true
[2020-07-20 17:12:39,523 INFO  L268        CegarLoopResult]: For program point  L154(line 154)  no Hoare annotation was computed.
[2020-07-20 17:12:39,523 INFO  L264        CegarLoopResult]: At program point  L154-1(lines 5 163)  the Hoare annotation is:  false
[2020-07-20 17:12:39,523 INFO  L268        CegarLoopResult]: For program point  L113-1(lines 39 158)  no Hoare annotation was computed.
[2020-07-20 17:12:39,523 INFO  L268        CegarLoopResult]: For program point  L138-1(lines 39 158)  no Hoare annotation was computed.
[2020-07-20 17:12:39,524 INFO  L268        CegarLoopResult]: For program point  L114(line 114)  no Hoare annotation was computed.
[2020-07-20 17:12:39,524 INFO  L268        CegarLoopResult]: For program point  L139(line 139)  no Hoare annotation was computed.
[2020-07-20 17:12:39,524 INFO  L268        CegarLoopResult]: For program point  L98-1(lines 39 158)  no Hoare annotation was computed.
[2020-07-20 17:12:39,524 INFO  L268        CegarLoopResult]: For program point  L123-1(lines 39 158)  no Hoare annotation was computed.
[2020-07-20 17:12:39,524 INFO  L268        CegarLoopResult]: For program point  L90-1(lines 39 158)  no Hoare annotation was computed.
[2020-07-20 17:12:39,524 INFO  L268        CegarLoopResult]: For program point  L148-1(lines 39 158)  no Hoare annotation was computed.
[2020-07-20 17:12:39,524 INFO  L268        CegarLoopResult]: For program point  L82-1(lines 39 158)  no Hoare annotation was computed.
[2020-07-20 17:12:39,525 INFO  L268        CegarLoopResult]: For program point  L41(lines 41 43)  no Hoare annotation was computed.
[2020-07-20 17:12:39,525 INFO  L268        CegarLoopResult]: For program point  L74-1(lines 39 158)  no Hoare annotation was computed.
[2020-07-20 17:12:39,525 INFO  L268        CegarLoopResult]: For program point  L66(lines 66 68)  no Hoare annotation was computed.
[2020-07-20 17:12:39,525 INFO  L268        CegarLoopResult]: For program point  L66-2(lines 39 158)  no Hoare annotation was computed.
[2020-07-20 17:12:39,525 INFO  L268        CegarLoopResult]: For program point  L124(line 124)  no Hoare annotation was computed.
[2020-07-20 17:12:39,525 INFO  L268        CegarLoopResult]: For program point  L149(line 149)  no Hoare annotation was computed.
[2020-07-20 17:12:39,525 INFO  L268        CegarLoopResult]: For program point  L108-1(lines 39 158)  no Hoare annotation was computed.
[2020-07-20 17:12:39,526 INFO  L268        CegarLoopResult]: For program point  L133-1(lines 39 158)  no Hoare annotation was computed.
[2020-07-20 17:12:39,526 INFO  L268        CegarLoopResult]: For program point  L109(line 109)  no Hoare annotation was computed.
[2020-07-20 17:12:39,526 INFO  L268        CegarLoopResult]: For program point  L134(line 134)  no Hoare annotation was computed.
[2020-07-20 17:12:39,553 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:12:39 BoogieIcfgContainer
[2020-07-20 17:12:39,553 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-20 17:12:39,558 INFO  L168              Benchmark]: Toolchain (without parser) took 19686.42 ms. Allocated memory was 144.2 MB in the beginning and 630.7 MB in the end (delta: 486.5 MB). Free memory was 102.1 MB in the beginning and 223.4 MB in the end (delta: -121.2 MB). Peak memory consumption was 365.3 MB. Max. memory is 7.1 GB.
[2020-07-20 17:12:39,559 INFO  L168              Benchmark]: CDTParser took 0.61 ms. Allocated memory is still 144.2 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
[2020-07-20 17:12:39,559 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 443.47 ms. Allocated memory is still 144.2 MB. Free memory was 101.7 MB in the beginning and 91.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB.
[2020-07-20 17:12:39,560 INFO  L168              Benchmark]: Boogie Preprocessor took 217.11 ms. Allocated memory was 144.2 MB in the beginning and 201.9 MB in the end (delta: 57.7 MB). Free memory was 91.2 MB in the beginning and 179.5 MB in the end (delta: -88.3 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB.
[2020-07-20 17:12:39,560 INFO  L168              Benchmark]: RCFGBuilder took 586.14 ms. Allocated memory is still 201.9 MB. Free memory was 179.5 MB in the beginning and 160.4 MB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 7.1 GB.
[2020-07-20 17:12:39,561 INFO  L168              Benchmark]: TraceAbstraction took 18427.21 ms. Allocated memory was 201.9 MB in the beginning and 630.7 MB in the end (delta: 428.9 MB). Free memory was 159.7 MB in the beginning and 223.4 MB in the end (delta: -63.6 MB). Peak memory consumption was 365.2 MB. Max. memory is 7.1 GB.
[2020-07-20 17:12:39,563 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.61 ms. Allocated memory is still 144.2 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 443.47 ms. Allocated memory is still 144.2 MB. Free memory was 101.7 MB in the beginning and 91.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 217.11 ms. Allocated memory was 144.2 MB in the beginning and 201.9 MB in the end (delta: 57.7 MB). Free memory was 91.2 MB in the beginning and 179.5 MB in the end (delta: -88.3 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 586.14 ms. Allocated memory is still 201.9 MB. Free memory was 179.5 MB in the beginning and 160.4 MB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 18427.21 ms. Allocated memory was 201.9 MB in the beginning and 630.7 MB in the end (delta: 428.9 MB). Free memory was 159.7 MB in the beginning and 223.4 MB in the end (delta: -63.6 MB). Peak memory consumption was 365.2 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - PositiveResult [Line: 161]: call of __VERIFIER_error() unreachable
    For all program executions holds that call of __VERIFIER_error() unreachable at this location
  - AllSpecificationsHoldResult: All specifications hold
    1 specifications checked. All of them hold
  - InvariantResult [Line: 39]: Loop Invariant
    Derived loop invariant: 1
  - InvariantResult [Line: 5]: Loop Invariant
    Derived loop invariant: 0
  - InvariantResult [Line: 5]: Loop Invariant
    Derived loop invariant: 1
  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 3 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 18.1s, OverallIterations: 28, TraceHistogramMax: 1, AutomataDifference: 4.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2384 SDtfs, 1153 SDslu, 1624 SDs, 0 SdLazy, 149 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 659 GetRequests, 631 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22536occurred in iteration=27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 4.8s AutomataMinimizationTime, 28 MinimizatonAttempts, 4124 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 1034 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 687 NumberOfCodeBlocks, 684 NumberOfCodeBlocksAsserted, 111 NumberOfCheckSat, 659 ConstructedInterpolants, 0 QuantifiedInterpolants, 31265 SizeOfPredicates, 0 NumberOfNonLiveVariables, 3125 ConjunctsInSsa, 84 ConjunctsInUnsatCore, 28 InterpolantComputations, 28 PerfectInterpolantSequences, 0/0 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 correct!
Received shutdown request...