/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_b5_o10-2.c


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


This is Ultimate 0.1.25-c90d42b
[2020-09-24 14:56:37,957 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-09-24 14:56:37,962 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-24 14:56:38,007 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-24 14:56:38,007 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-24 14:56:38,019 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-24 14:56:38,021 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2020-09-24 14:56:38,034 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
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[2020-09-24 14:56:38,044 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-24 14:56:38,047 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-24 14:56:38,048 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-24 14:56:38,052 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-24 14:56:38,062 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-24 14:56:38,065 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-24 14:56:38,066 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-24 14:56:38,068 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-09-24 14:56:38,069 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-24 14:56:38,072 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-24 14:56:38,072 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-24 14:56:38,073 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
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[2020-09-24 14:56:38,086 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-09-24 14:56:38,089 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-09-24 14:56:38,090 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-09-24 14:56:38,142 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-09-24 14:56:38,143 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-24 14:56:38,146 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-24 14:56:38,146 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-09-24 14:56:38,146 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-09-24 14:56:38,147 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-24 14:56:38,147 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-09-24 14:56:38,147 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-09-24 14:56:38,148 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-09-24 14:56:38,148 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-09-24 14:56:38,149 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-09-24 14:56:38,150 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-24 14:56:38,150 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-09-24 14:56:38,150 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-09-24 14:56:38,151 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-09-24 14:56:38,151 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-09-24 14:56:38,151 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-09-24 14:56:38,151 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-24 14:56:38,152 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-09-24 14:56:38,152 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-09-24 14:56:38,152 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-09-24 14:56:38,152 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 14:56:38,152 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-24 14:56:38,153 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-09-24 14:56:38,153 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-24 14:56:38,153 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-09-24 14:56:38,153 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-24 14:56:38,154 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-24 14:56:38,154 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-09-24 14:56:38,154 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 -> Craig_NestedInterpolation
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false
[2020-09-24 14:56:38,660 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-24 14:56:38,687 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-24 14:56:38,691 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-24 14:56:38,693 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-09-24 14:56:38,693 INFO  L275        PluginConnector]: CDTParser initialized
[2020-09-24 14:56:38,694 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b5_o10-2.c
[2020-09-24 14:56:38,782 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/822912469/b17fc21e35f340cba64cc51f5446aabd/FLAG8d8e50495
[2020-09-24 14:56:39,310 INFO  L306              CDTParser]: Found 1 translation units.
[2020-09-24 14:56:39,310 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_b5_o10-2.c
[2020-09-24 14:56:39,320 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/822912469/b17fc21e35f340cba64cc51f5446aabd/FLAG8d8e50495
[2020-09-24 14:56:39,620 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/822912469/b17fc21e35f340cba64cc51f5446aabd
[2020-09-24 14:56:39,632 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-24 14:56:39,639 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-24 14:56:39,640 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-24 14:56:39,640 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-24 14:56:39,644 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-24 14:56:39,646 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:56:39" (1/1) ...
[2020-09-24 14:56:39,650 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@788ef5e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:56:39, skipping insertion in model container
[2020-09-24 14:56:39,650 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:56:39" (1/1) ...
[2020-09-24 14:56:39,659 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-09-24 14:56:39,683 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-09-24 14:56:39,878 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 14:56:39,883 INFO  L203         MainTranslator]: Completed pre-run
[2020-09-24 14:56:39,900 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 14:56:39,914 INFO  L208         MainTranslator]: Completed translation
[2020-09-24 14:56:39,914 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:56:39 WrapperNode
[2020-09-24 14:56:39,914 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-24 14:56:39,915 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-24 14:56:39,916 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-24 14:56:39,916 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-09-24 14:56:39,929 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:56:39" (1/1) ...
[2020-09-24 14:56:39,930 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:56:39" (1/1) ...
[2020-09-24 14:56:39,935 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:56:39" (1/1) ...
[2020-09-24 14:56:39,935 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:56:39" (1/1) ...
[2020-09-24 14:56:39,940 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:56:39" (1/1) ...
[2020-09-24 14:56:39,942 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:56:39" (1/1) ...
[2020-09-24 14:56:39,943 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:56:39" (1/1) ...
[2020-09-24 14:56:39,945 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-24 14:56:39,946 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-24 14:56:39,946 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-09-24 14:56:39,946 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-09-24 14:56:39,947 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:56:39" (1/1) ...
No working directory specified, using /storage/repos/ultimate-2/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
[2020-09-24 14:56:40,110 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-24 14:56:40,110 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-24 14:56:40,110 INFO  L138     BoogieDeclarations]: Found implementation of procedure id
[2020-09-24 14:56:40,110 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-09-24 14:56:40,111 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-09-24 14:56:40,111 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-24 14:56:40,111 INFO  L130     BoogieDeclarations]: Found specification of procedure id
[2020-09-24 14:56:40,111 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-09-24 14:56:40,112 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-24 14:56:40,112 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-24 14:56:40,334 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-24 14:56:40,335 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-09-24 14:56:40,340 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:56:40 BoogieIcfgContainer
[2020-09-24 14:56:40,340 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-24 14:56:40,341 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-24 14:56:40,342 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-09-24 14:56:40,345 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-09-24 14:56:40,346 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 02:56:39" (1/3) ...
[2020-09-24 14:56:40,347 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19f9a53c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:56:40, skipping insertion in model container
[2020-09-24 14:56:40,348 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:56:39" (2/3) ...
[2020-09-24 14:56:40,348 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19f9a53c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:56:40, skipping insertion in model container
[2020-09-24 14:56:40,348 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:56:40" (3/3) ...
[2020-09-24 14:56:40,351 INFO  L109   eAbstractionObserver]: Analyzing ICFG id_b5_o10-2.c
[2020-09-24 14:56:40,363 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-24 14:56:40,374 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-24 14:56:40,410 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-24 14:56:40,450 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-09-24 14:56:40,451 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-09-24 14:56:40,451 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-24 14:56:40,451 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-24 14:56:40,451 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-24 14:56:40,452 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-09-24 14:56:40,452 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-24 14:56:40,452 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-24 14:56:40,480 INFO  L276                IsEmpty]: Start isEmpty. Operand 30 states.
[2020-09-24 14:56:40,490 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2020-09-24 14:56:40,491 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 14:56:40,492 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 14:56:40,493 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 14:56:40,501 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 14:56:40,502 INFO  L82        PathProgramCache]: Analyzing trace with hash 856871792, now seen corresponding path program 1 times
[2020-09-24 14:56:40,517 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 14:56:40,517 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697275550]
[2020-09-24 14:56:40,518 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 14:56:40,638 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:40,722 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 14:56:40,723 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:40,729 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7
[2020-09-24 14:56:40,736 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:40,769 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 14:56:40,770 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697275550]
[2020-09-24 14:56:40,772 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 14:56:40,773 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-24 14:56:40,774 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519355227]
[2020-09-24 14:56:40,781 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-24 14:56:40,781 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 14:56:40,798 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-24 14:56:40,800 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-24 14:56:40,803 INFO  L87              Difference]: Start difference. First operand 30 states. Second operand 5 states.
[2020-09-24 14:56:40,932 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 14:56:40,933 INFO  L93              Difference]: Finished difference Result 44 states and 48 transitions.
[2020-09-24 14:56:40,934 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-09-24 14:56:40,936 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 18
[2020-09-24 14:56:40,937 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 14:56:40,958 INFO  L225             Difference]: With dead ends: 44
[2020-09-24 14:56:40,958 INFO  L226             Difference]: Without dead ends: 28
[2020-09-24 14:56:40,964 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-09-24 14:56:40,991 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 28 states.
[2020-09-24 14:56:41,035 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28.
[2020-09-24 14:56:41,037 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 28 states.
[2020-09-24 14:56:41,041 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions.
[2020-09-24 14:56:41,043 INFO  L78                 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 18
[2020-09-24 14:56:41,045 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 14:56:41,045 INFO  L479      AbstractCegarLoop]: Abstraction has 28 states and 30 transitions.
[2020-09-24 14:56:41,045 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-24 14:56:41,045 INFO  L276                IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions.
[2020-09-24 14:56:41,051 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 29
[2020-09-24 14:56:41,051 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 14:56:41,052 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 14:56:41,052 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-24 14:56:41,053 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 14:56:41,053 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 14:56:41,054 INFO  L82        PathProgramCache]: Analyzing trace with hash 1774609951, now seen corresponding path program 1 times
[2020-09-24 14:56:41,054 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 14:56:41,054 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542522793]
[2020-09-24 14:56:41,055 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 14:56:41,100 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:41,125 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 14:56:41,126 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:41,128 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7
[2020-09-24 14:56:41,140 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:41,177 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-09-24 14:56:41,180 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:41,210 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2020-09-24 14:56:41,210 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542522793]
[2020-09-24 14:56:41,211 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 14:56:41,211 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-24 14:56:41,211 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317248688]
[2020-09-24 14:56:41,213 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-24 14:56:41,214 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 14:56:41,214 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-24 14:56:41,214 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-24 14:56:41,215 INFO  L87              Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 5 states.
[2020-09-24 14:56:41,275 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 14:56:41,275 INFO  L93              Difference]: Finished difference Result 49 states and 54 transitions.
[2020-09-24 14:56:41,276 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-09-24 14:56:41,276 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 28
[2020-09-24 14:56:41,277 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 14:56:41,278 INFO  L225             Difference]: With dead ends: 49
[2020-09-24 14:56:41,278 INFO  L226             Difference]: Without dead ends: 35
[2020-09-24 14:56:41,280 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-09-24 14:56:41,280 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 35 states.
[2020-09-24 14:56:41,286 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32.
[2020-09-24 14:56:41,287 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 32 states.
[2020-09-24 14:56:41,288 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions.
[2020-09-24 14:56:41,288 INFO  L78                 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 28
[2020-09-24 14:56:41,289 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 14:56:41,289 INFO  L479      AbstractCegarLoop]: Abstraction has 32 states and 34 transitions.
[2020-09-24 14:56:41,289 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-24 14:56:41,289 INFO  L276                IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions.
[2020-09-24 14:56:41,291 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 29
[2020-09-24 14:56:41,291 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 14:56:41,291 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 14:56:41,292 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-24 14:56:41,292 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 14:56:41,292 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 14:56:41,292 INFO  L82        PathProgramCache]: Analyzing trace with hash 1645321695, now seen corresponding path program 1 times
[2020-09-24 14:56:41,293 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 14:56:41,293 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115385346]
[2020-09-24 14:56:41,293 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 14:56:41,310 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:41,358 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 14:56:41,359 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:41,361 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7
[2020-09-24 14:56:41,370 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:41,429 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-09-24 14:56:41,434 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:41,458 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2020-09-24 14:56:41,458 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115385346]
[2020-09-24 14:56:41,459 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 14:56:41,459 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8
[2020-09-24 14:56:41,459 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893213137]
[2020-09-24 14:56:41,460 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-09-24 14:56:41,460 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 14:56:41,460 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-09-24 14:56:41,461 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2020-09-24 14:56:41,461 INFO  L87              Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 8 states.
[2020-09-24 14:56:41,554 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 14:56:41,555 INFO  L93              Difference]: Finished difference Result 41 states and 43 transitions.
[2020-09-24 14:56:41,555 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2020-09-24 14:56:41,555 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 28
[2020-09-24 14:56:41,556 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 14:56:41,557 INFO  L225             Difference]: With dead ends: 41
[2020-09-24 14:56:41,557 INFO  L226             Difference]: Without dead ends: 35
[2020-09-24 14:56:41,558 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2020-09-24 14:56:41,559 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 35 states.
[2020-09-24 14:56:41,564 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35.
[2020-09-24 14:56:41,565 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 35 states.
[2020-09-24 14:56:41,566 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions.
[2020-09-24 14:56:41,566 INFO  L78                 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28
[2020-09-24 14:56:41,566 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 14:56:41,567 INFO  L479      AbstractCegarLoop]: Abstraction has 35 states and 37 transitions.
[2020-09-24 14:56:41,567 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-09-24 14:56:41,567 INFO  L276                IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions.
[2020-09-24 14:56:41,568 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 39
[2020-09-24 14:56:41,568 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 14:56:41,569 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 14:56:41,569 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-24 14:56:41,569 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 14:56:41,570 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 14:56:41,570 INFO  L82        PathProgramCache]: Analyzing trace with hash 170302224, now seen corresponding path program 1 times
[2020-09-24 14:56:41,570 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 14:56:41,571 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545961362]
[2020-09-24 14:56:41,571 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 14:56:41,606 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:41,669 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 14:56:41,670 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:41,672 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7
[2020-09-24 14:56:41,684 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:41,733 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-09-24 14:56:41,735 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:41,750 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-09-24 14:56:41,755 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:41,767 INFO  L134       CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked.
[2020-09-24 14:56:41,767 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545961362]
[2020-09-24 14:56:41,768 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 14:56:41,768 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-24 14:56:41,768 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520737600]
[2020-09-24 14:56:41,769 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-24 14:56:41,769 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 14:56:41,770 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-24 14:56:41,770 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-24 14:56:41,770 INFO  L87              Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 5 states.
[2020-09-24 14:56:41,802 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 14:56:41,802 INFO  L93              Difference]: Finished difference Result 43 states and 45 transitions.
[2020-09-24 14:56:41,803 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-09-24 14:56:41,803 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 38
[2020-09-24 14:56:41,804 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 14:56:41,805 INFO  L225             Difference]: With dead ends: 43
[2020-09-24 14:56:41,805 INFO  L226             Difference]: Without dead ends: 37
[2020-09-24 14:56:41,806 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-09-24 14:56:41,806 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 37 states.
[2020-09-24 14:56:41,811 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35.
[2020-09-24 14:56:41,812 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 35 states.
[2020-09-24 14:56:41,823 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions.
[2020-09-24 14:56:41,823 INFO  L78                 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 38
[2020-09-24 14:56:41,824 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 14:56:41,824 INFO  L479      AbstractCegarLoop]: Abstraction has 35 states and 37 transitions.
[2020-09-24 14:56:41,824 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-24 14:56:41,824 INFO  L276                IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions.
[2020-09-24 14:56:41,825 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 39
[2020-09-24 14:56:41,825 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 14:56:41,826 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 14:56:41,826 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-09-24 14:56:41,826 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 14:56:41,827 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 14:56:41,827 INFO  L82        PathProgramCache]: Analyzing trace with hash 41013968, now seen corresponding path program 2 times
[2020-09-24 14:56:41,827 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 14:56:41,827 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945356578]
[2020-09-24 14:56:41,828 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 14:56:41,842 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:41,886 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 14:56:41,887 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:41,889 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7
[2020-09-24 14:56:41,910 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:41,947 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-09-24 14:56:41,954 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:42,004 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-09-24 14:56:42,007 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:42,029 INFO  L134       CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked.
[2020-09-24 14:56:42,029 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945356578]
[2020-09-24 14:56:42,030 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 14:56:42,030 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11
[2020-09-24 14:56:42,030 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860265011]
[2020-09-24 14:56:42,031 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 11 states
[2020-09-24 14:56:42,031 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 14:56:42,031 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2020-09-24 14:56:42,032 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110
[2020-09-24 14:56:42,032 INFO  L87              Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 11 states.
[2020-09-24 14:56:42,182 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 14:56:42,182 INFO  L93              Difference]: Finished difference Result 64 states and 69 transitions.
[2020-09-24 14:56:42,183 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. 
[2020-09-24 14:56:42,183 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 38
[2020-09-24 14:56:42,184 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 14:56:42,185 INFO  L225             Difference]: With dead ends: 64
[2020-09-24 14:56:42,186 INFO  L226             Difference]: Without dead ends: 44
[2020-09-24 14:56:42,187 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240
[2020-09-24 14:56:42,187 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 44 states.
[2020-09-24 14:56:42,196 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42.
[2020-09-24 14:56:42,197 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 42 states.
[2020-09-24 14:56:42,198 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions.
[2020-09-24 14:56:42,200 INFO  L78                 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 38
[2020-09-24 14:56:42,202 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 14:56:42,203 INFO  L479      AbstractCegarLoop]: Abstraction has 42 states and 44 transitions.
[2020-09-24 14:56:42,203 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2020-09-24 14:56:42,203 INFO  L276                IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions.
[2020-09-24 14:56:42,205 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 49
[2020-09-24 14:56:42,205 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 14:56:42,208 INFO  L422         BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 14:56:42,208 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-09-24 14:56:42,209 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 14:56:42,209 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 14:56:42,209 INFO  L82        PathProgramCache]: Analyzing trace with hash -1045014785, now seen corresponding path program 3 times
[2020-09-24 14:56:42,209 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 14:56:42,210 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076032684]
[2020-09-24 14:56:42,210 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 14:56:42,241 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:42,282 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 14:56:42,282 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:42,284 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7
[2020-09-24 14:56:42,304 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:42,360 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-09-24 14:56:42,368 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:42,415 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-09-24 14:56:42,421 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:42,465 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-09-24 14:56:42,468 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:42,496 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked.
[2020-09-24 14:56:42,496 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076032684]
[2020-09-24 14:56:42,497 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 14:56:42,497 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14
[2020-09-24 14:56:42,497 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894412306]
[2020-09-24 14:56:42,498 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 14 states
[2020-09-24 14:56:42,498 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 14:56:42,498 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2020-09-24 14:56:42,498 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182
[2020-09-24 14:56:42,499 INFO  L87              Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 14 states.
[2020-09-24 14:56:42,644 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 14:56:42,645 INFO  L93              Difference]: Finished difference Result 71 states and 76 transitions.
[2020-09-24 14:56:42,645 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. 
[2020-09-24 14:56:42,645 INFO  L78                 Accepts]: Start accepts. Automaton has 14 states. Word has length 48
[2020-09-24 14:56:42,646 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 14:56:42,648 INFO  L225             Difference]: With dead ends: 71
[2020-09-24 14:56:42,648 INFO  L226             Difference]: Without dead ends: 51
[2020-09-24 14:56:42,650 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420
[2020-09-24 14:56:42,650 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 51 states.
[2020-09-24 14:56:42,664 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49.
[2020-09-24 14:56:42,665 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 49 states.
[2020-09-24 14:56:42,666 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions.
[2020-09-24 14:56:42,666 INFO  L78                 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 48
[2020-09-24 14:56:42,666 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 14:56:42,667 INFO  L479      AbstractCegarLoop]: Abstraction has 49 states and 51 transitions.
[2020-09-24 14:56:42,671 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 14 states.
[2020-09-24 14:56:42,671 INFO  L276                IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions.
[2020-09-24 14:56:42,672 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 59
[2020-09-24 14:56:42,672 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 14:56:42,673 INFO  L422         BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 14:56:42,673 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-09-24 14:56:42,673 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 14:56:42,673 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 14:56:42,674 INFO  L82        PathProgramCache]: Analyzing trace with hash 485800496, now seen corresponding path program 4 times
[2020-09-24 14:56:42,676 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 14:56:42,676 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370124049]
[2020-09-24 14:56:42,676 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 14:56:42,708 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:42,752 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 14:56:42,753 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:42,754 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7
[2020-09-24 14:56:42,776 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:42,836 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-09-24 14:56:42,851 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:42,906 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-09-24 14:56:42,916 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:42,974 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-09-24 14:56:42,979 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:43,046 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-09-24 14:56:43,048 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:43,074 INFO  L134       CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked.
[2020-09-24 14:56:43,074 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370124049]
[2020-09-24 14:56:43,074 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 14:56:43,075 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17
[2020-09-24 14:56:43,075 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524509666]
[2020-09-24 14:56:43,077 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 17 states
[2020-09-24 14:56:43,077 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 14:56:43,077 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2020-09-24 14:56:43,079 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272
[2020-09-24 14:56:43,079 INFO  L87              Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 17 states.
[2020-09-24 14:56:43,267 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 14:56:43,268 INFO  L93              Difference]: Finished difference Result 78 states and 83 transitions.
[2020-09-24 14:56:43,268 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. 
[2020-09-24 14:56:43,268 INFO  L78                 Accepts]: Start accepts. Automaton has 17 states. Word has length 58
[2020-09-24 14:56:43,269 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 14:56:43,270 INFO  L225             Difference]: With dead ends: 78
[2020-09-24 14:56:43,270 INFO  L226             Difference]: Without dead ends: 58
[2020-09-24 14:56:43,271 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650
[2020-09-24 14:56:43,272 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 58 states.
[2020-09-24 14:56:43,277 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56.
[2020-09-24 14:56:43,277 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 56 states.
[2020-09-24 14:56:43,278 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions.
[2020-09-24 14:56:43,278 INFO  L78                 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 58
[2020-09-24 14:56:43,279 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 14:56:43,279 INFO  L479      AbstractCegarLoop]: Abstraction has 56 states and 58 transitions.
[2020-09-24 14:56:43,279 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 17 states.
[2020-09-24 14:56:43,279 INFO  L276                IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions.
[2020-09-24 14:56:43,280 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 69
[2020-09-24 14:56:43,280 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 14:56:43,280 INFO  L422         BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 14:56:43,281 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2020-09-24 14:56:43,281 INFO  L427      AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 14:56:43,281 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 14:56:43,281 INFO  L82        PathProgramCache]: Analyzing trace with hash -1938626529, now seen corresponding path program 5 times
[2020-09-24 14:56:43,282 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 14:56:43,282 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466989491]
[2020-09-24 14:56:43,282 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 14:56:43,302 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:43,340 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 14:56:43,341 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:43,342 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7
[2020-09-24 14:56:43,364 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:43,414 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-09-24 14:56:43,424 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:43,475 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-09-24 14:56:43,485 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:43,544 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-09-24 14:56:43,551 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:43,613 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-09-24 14:56:43,620 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:43,683 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-09-24 14:56:43,685 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:43,730 INFO  L134       CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked.
[2020-09-24 14:56:43,731 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466989491]
[2020-09-24 14:56:43,731 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 14:56:43,731 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20
[2020-09-24 14:56:43,732 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246539397]
[2020-09-24 14:56:43,732 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 20 states
[2020-09-24 14:56:43,733 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 14:56:43,733 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2020-09-24 14:56:43,734 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380
[2020-09-24 14:56:43,734 INFO  L87              Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 20 states.
[2020-09-24 14:56:43,949 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 14:56:43,950 INFO  L93              Difference]: Finished difference Result 76 states and 81 transitions.
[2020-09-24 14:56:43,950 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. 
[2020-09-24 14:56:43,950 INFO  L78                 Accepts]: Start accepts. Automaton has 20 states. Word has length 68
[2020-09-24 14:56:43,951 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 14:56:43,951 INFO  L225             Difference]: With dead ends: 76
[2020-09-24 14:56:43,951 INFO  L226             Difference]: Without dead ends: 0
[2020-09-24 14:56:43,953 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930
[2020-09-24 14:56:43,953 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2020-09-24 14:56:43,953 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2020-09-24 14:56:43,954 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 0 states.
[2020-09-24 14:56:43,954 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2020-09-24 14:56:43,954 INFO  L78                 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 68
[2020-09-24 14:56:43,954 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 14:56:43,954 INFO  L479      AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2020-09-24 14:56:43,954 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 20 states.
[2020-09-24 14:56:43,955 INFO  L276                IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2020-09-24 14:56:43,955 INFO  L282                IsEmpty]: Finished isEmpty. No accepting run.
[2020-09-24 14:56:43,955 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2020-09-24 14:56:43,958 INFO  L343    DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.
[2020-09-24 14:56:43,982 INFO  L271        CegarLoopResult]: At program point  ULTIMATE.initFINAL(line -1)  the Hoare annotation is:  true
[2020-09-24 14:56:43,982 INFO  L268        CegarLoopResult]: For program point  ULTIMATE.initEXIT(line -1)  no Hoare annotation was computed.
[2020-09-24 14:56:43,982 INFO  L268        CegarLoopResult]: For program point  ULTIMATE.startEXIT(line -1)  no Hoare annotation was computed.
[2020-09-24 14:56:43,982 INFO  L271        CegarLoopResult]: At program point  L-1(line -1)  the Hoare annotation is:  true
[2020-09-24 14:56:43,982 INFO  L271        CegarLoopResult]: At program point  ULTIMATE.startENTRY(line -1)  the Hoare annotation is:  true
[2020-09-24 14:56:43,982 INFO  L268        CegarLoopResult]: For program point  ULTIMATE.startFINAL(line -1)  no Hoare annotation was computed.
[2020-09-24 14:56:43,983 INFO  L268        CegarLoopResult]: For program point  mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15)  no Hoare annotation was computed.
[2020-09-24 14:56:43,983 INFO  L271        CegarLoopResult]: At program point  mainENTRY(lines 11 17)  the Hoare annotation is:  true
[2020-09-24 14:56:43,983 INFO  L268        CegarLoopResult]: For program point  mainEXIT(lines 11 17)  no Hoare annotation was computed.
[2020-09-24 14:56:43,983 INFO  L268        CegarLoopResult]: For program point  L15(line 15)  no Hoare annotation was computed.
[2020-09-24 14:56:43,983 INFO  L268        CegarLoopResult]: For program point  L14(lines 14 16)  no Hoare annotation was computed.
[2020-09-24 14:56:43,983 INFO  L271        CegarLoopResult]: At program point  L13(line 13)  the Hoare annotation is:  true
[2020-09-24 14:56:43,983 INFO  L268        CegarLoopResult]: For program point  L12(line 12)  no Hoare annotation was computed.
[2020-09-24 14:56:43,984 INFO  L268        CegarLoopResult]: For program point  L13-1(line 13)  no Hoare annotation was computed.
[2020-09-24 14:56:43,984 INFO  L268        CegarLoopResult]: For program point  L14-2(lines 11 17)  no Hoare annotation was computed.
[2020-09-24 14:56:43,984 INFO  L268        CegarLoopResult]: For program point  L12-1(line 12)  no Hoare annotation was computed.
[2020-09-24 14:56:43,984 INFO  L268        CegarLoopResult]: For program point  L13-2(line 13)  no Hoare annotation was computed.
[2020-09-24 14:56:43,984 INFO  L268        CegarLoopResult]: For program point  L13-3(line 13)  no Hoare annotation was computed.
[2020-09-24 14:56:43,984 INFO  L268        CegarLoopResult]: For program point  idFINAL(lines 4 9)  no Hoare annotation was computed.
[2020-09-24 14:56:43,984 INFO  L268        CegarLoopResult]: For program point  idEXIT(lines 4 9)  no Hoare annotation was computed.
[2020-09-24 14:56:43,985 INFO  L271        CegarLoopResult]: At program point  idENTRY(lines 4 9)  the Hoare annotation is:  true
[2020-09-24 14:56:43,985 INFO  L268        CegarLoopResult]: For program point  L8(line 8)  no Hoare annotation was computed.
[2020-09-24 14:56:43,985 INFO  L268        CegarLoopResult]: For program point  L7(line 7)  no Hoare annotation was computed.
[2020-09-24 14:56:43,985 INFO  L271        CegarLoopResult]: At program point  L6(line 6)  the Hoare annotation is:  true
[2020-09-24 14:56:43,985 INFO  L268        CegarLoopResult]: For program point  L7-1(line 7)  no Hoare annotation was computed.
[2020-09-24 14:56:43,985 INFO  L268        CegarLoopResult]: For program point  L5(line 5)  no Hoare annotation was computed.
[2020-09-24 14:56:43,985 INFO  L268        CegarLoopResult]: For program point  L6-1(line 6)  no Hoare annotation was computed.
[2020-09-24 14:56:43,986 INFO  L268        CegarLoopResult]: For program point  L5-1(line 5)  no Hoare annotation was computed.
[2020-09-24 14:56:43,986 INFO  L268        CegarLoopResult]: For program point  L6-2(line 6)  no Hoare annotation was computed.
[2020-09-24 14:56:43,986 INFO  L268        CegarLoopResult]: For program point  L6-3(line 6)  no Hoare annotation was computed.
[2020-09-24 14:56:43,994 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 02:56:43 BoogieIcfgContainer
[2020-09-24 14:56:43,994 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-09-24 14:56:43,998 INFO  L168              Benchmark]: Toolchain (without parser) took 4362.02 ms. Allocated memory was 140.0 MB in the beginning and 245.4 MB in the end (delta: 105.4 MB). Free memory was 103.3 MB in the beginning and 196.8 MB in the end (delta: -93.5 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB.
[2020-09-24 14:56:43,998 INFO  L168              Benchmark]: CDTParser took 0.56 ms. Allocated memory is still 140.0 MB. Free memory was 121.6 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB.
[2020-09-24 14:56:43,999 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 275.23 ms. Allocated memory is still 140.0 MB. Free memory was 102.6 MB in the beginning and 93.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB.
[2020-09-24 14:56:44,000 INFO  L168              Benchmark]: Boogie Preprocessor took 30.04 ms. Allocated memory is still 140.0 MB. Free memory was 93.4 MB in the beginning and 92.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB.
[2020-09-24 14:56:44,001 INFO  L168              Benchmark]: RCFGBuilder took 394.55 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 92.1 MB in the beginning and 170.0 MB in the end (delta: -77.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB.
[2020-09-24 14:56:44,003 INFO  L168              Benchmark]: TraceAbstraction took 3652.59 ms. Allocated memory was 202.9 MB in the beginning and 245.4 MB in the end (delta: 42.5 MB). Free memory was 169.3 MB in the beginning and 196.8 MB in the end (delta: -27.5 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB.
[2020-09-24 14:56:44,006 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.56 ms. Allocated memory is still 140.0 MB. Free memory was 121.6 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 275.23 ms. Allocated memory is still 140.0 MB. Free memory was 102.6 MB in the beginning and 93.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 30.04 ms. Allocated memory is still 140.0 MB. Free memory was 93.4 MB in the beginning and 92.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 394.55 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 92.1 MB in the beginning and 170.0 MB in the end (delta: -77.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 3652.59 ms. Allocated memory was 202.9 MB in the beginning and 245.4 MB in the end (delta: 42.5 MB). Free memory was 169.3 MB in the beginning and 196.8 MB in the end (delta: -27.5 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - PositiveResult [Line: 15]: 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
  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 4 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.5s, OverallIterations: 8, TraceHistogramMax: 6, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 199 SDtfs, 91 SDslu, 983 SDs, 0 SdLazy, 371 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 192 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 11 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 7 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 324 NumberOfCodeBlocks, 324 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 316 ConstructedInterpolants, 0 QuantifiedInterpolants, 29494 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 111/281 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...