/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 true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c


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


This is Ultimate 0.1.25-c90d42b
[2020-09-24 20:44:40,880 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-09-24 20:44:40,883 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-24 20:44:40,911 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-24 20:44:40,912 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-24 20:44:40,913 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-24 20:44:40,914 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-24 20:44:40,916 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-24 20:44:40,918 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
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[2020-09-24 20:44:40,921 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-24 20:44:40,925 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-24 20:44:40,926 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-24 20:44:40,927 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-24 20:44:40,931 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-24 20:44:40,935 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-24 20:44:40,937 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-24 20:44:40,940 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-24 20:44:40,944 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-24 20:44:40,945 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-24 20:44:40,946 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-09-24 20:44:40,948 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-24 20:44:40,954 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-24 20:44:40,954 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-24 20:44:40,954 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-24 20:44:40,957 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-24 20:44:40,957 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-24 20:44:40,960 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-24 20:44:40,960 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-24 20:44:40,963 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-24 20:44:40,964 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-24 20:44:40,965 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-24 20:44:40,974 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-24 20:44:40,975 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-24 20:44:40,975 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-09-24 20:44:40,976 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-09-24 20:44:40,976 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-09-24 20:44:40,979 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-09-24 20:44:40,980 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-09-24 20:44:40,981 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 20:44:41,028 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-09-24 20:44:41,028 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-24 20:44:41,031 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-24 20:44:41,031 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-09-24 20:44:41,032 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-09-24 20:44:41,032 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-24 20:44:41,032 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-09-24 20:44:41,033 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-09-24 20:44:41,033 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-09-24 20:44:41,033 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-09-24 20:44:41,034 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-09-24 20:44:41,034 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-24 20:44:41,035 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-09-24 20:44:41,035 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-09-24 20:44:41,035 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-09-24 20:44:41,035 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-09-24 20:44:41,036 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-09-24 20:44:41,036 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-24 20:44:41,036 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-09-24 20:44:41,037 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-09-24 20:44:41,037 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-09-24 20:44:41,037 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 20:44:41,037 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-24 20:44:41,037 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-09-24 20:44:41,038 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-24 20:44:41,038 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-09-24 20:44:41,038 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-24 20:44:41,038 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-24 20:44:41,038 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-09-24 20:44:41,039 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 -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;
[2020-09-24 20:44:41,481 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-24 20:44:41,500 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-24 20:44:41,504 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-24 20:44:41,506 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-09-24 20:44:41,507 INFO  L275        PluginConnector]: CDTParser initialized
[2020-09-24 20:44:41,508 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c
[2020-09-24 20:44:41,607 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ffa75b093/13e712c31e4e4d7daccab74f22524d6a/FLAGa3cc9b622
[2020-09-24 20:44:42,267 INFO  L306              CDTParser]: Found 1 translation units.
[2020-09-24 20:44:42,268 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c
[2020-09-24 20:44:42,298 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ffa75b093/13e712c31e4e4d7daccab74f22524d6a/FLAGa3cc9b622
[2020-09-24 20:44:42,501 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ffa75b093/13e712c31e4e4d7daccab74f22524d6a
[2020-09-24 20:44:42,515 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-24 20:44:42,520 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-24 20:44:42,521 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-24 20:44:42,521 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-24 20:44:42,526 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-24 20:44:42,527 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:44:42" (1/1) ...
[2020-09-24 20:44:42,531 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17866592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:42, skipping insertion in model container
[2020-09-24 20:44:42,532 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:44:42" (1/1) ...
[2020-09-24 20:44:42,539 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-09-24 20:44:42,619 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-09-24 20:44:43,296 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 20:44:43,316 INFO  L203         MainTranslator]: Completed pre-run
[2020-09-24 20:44:43,882 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 20:44:43,906 INFO  L208         MainTranslator]: Completed translation
[2020-09-24 20:44:43,907 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:43 WrapperNode
[2020-09-24 20:44:43,907 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-24 20:44:43,908 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-24 20:44:43,908 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-24 20:44:43,909 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-09-24 20:44:43,930 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:43" (1/1) ...
[2020-09-24 20:44:43,930 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:43" (1/1) ...
[2020-09-24 20:44:43,952 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:43" (1/1) ...
[2020-09-24 20:44:43,953 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:43" (1/1) ...
[2020-09-24 20:44:43,985 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:43" (1/1) ...
[2020-09-24 20:44:44,026 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:43" (1/1) ...
[2020-09-24 20:44:44,040 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:43" (1/1) ...
[2020-09-24 20:44:44,057 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-24 20:44:44,057 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-24 20:44:44,058 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-09-24 20:44:44,058 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-09-24 20:44:44,062 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:43" (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 20:44:44,187 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-24 20:44:44,188 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-24 20:44:44,188 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-09-24 20:44:44,188 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-09-24 20:44:44,188 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-24 20:44:44,189 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2020-09-24 20:44:44,189 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar
[2020-09-24 20:44:44,189 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-09-24 20:44:44,190 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2020-09-24 20:44:44,191 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-09-24 20:44:44,191 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-09-24 20:44:44,191 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2020-09-24 20:44:44,191 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2020-09-24 20:44:44,191 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2020-09-24 20:44:44,192 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2020-09-24 20:44:44,193 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2020-09-24 20:44:44,193 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2020-09-24 20:44:44,194 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2020-09-24 20:44:44,194 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-09-24 20:44:44,194 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-24 20:44:44,194 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-24 20:44:46,272 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-24 20:44:46,273 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-09-24 20:44:46,287 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:44:46 BoogieIcfgContainer
[2020-09-24 20:44:46,287 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-24 20:44:46,288 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-24 20:44:46,289 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-09-24 20:44:46,293 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-09-24 20:44:46,293 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 08:44:42" (1/3) ...
[2020-09-24 20:44:46,294 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76a2be39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:44:46, skipping insertion in model container
[2020-09-24 20:44:46,295 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:43" (2/3) ...
[2020-09-24 20:44:46,295 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76a2be39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:44:46, skipping insertion in model container
[2020-09-24 20:44:46,295 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:44:46" (3/3) ...
[2020-09-24 20:44:46,298 INFO  L109   eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c
[2020-09-24 20:44:46,310 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-24 20:44:46,321 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations.
[2020-09-24 20:44:46,344 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 5 error locations.
[2020-09-24 20:44:46,383 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-09-24 20:44:46,384 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-09-24 20:44:46,384 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-24 20:44:46,384 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-24 20:44:46,384 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-24 20:44:46,384 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-09-24 20:44:46,385 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-24 20:44:46,385 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-24 20:44:46,430 INFO  L276                IsEmpty]: Start isEmpty. Operand 1123 states.
[2020-09-24 20:44:46,471 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 415
[2020-09-24 20:44:46,471 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 20:44:46,473 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 20:44:46,474 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 20:44:46,484 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 20:44:46,485 INFO  L82        PathProgramCache]: Analyzing trace with hash -1272027086, now seen corresponding path program 1 times
[2020-09-24 20:44:46,498 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 20:44:46,499 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051692475]
[2020-09-24 20:44:46,499 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 20:44:47,104 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:44:47,355 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:44:47,744 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:44:47,940 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:44:48,153 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:44:48,331 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:44:48,560 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:44:48,910 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:44:49,222 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:44:52,136 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:44:52,137 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 421
[2020-09-24 20:44:52,137 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 8
[2020-09-24 20:44:52,137 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5019
[2020-09-24 20:44:52,140 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:44:52,141 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 3
[2020-09-24 20:44:52,141 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 165
[2020-09-24 20:44:52,142 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 65
[2020-09-24 20:44:52,142 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 4
[2020-09-24 20:44:52,754 WARN  L193               SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 187
[2020-09-24 20:44:52,756 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 20:44:52,765 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:44:52,775 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:44:52,820 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:44:52,820 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 71
[2020-09-24 20:44:52,821 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 20:44:52,821 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 54
[2020-09-24 20:44:52,821 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:44:52,821 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 20:44:52,822 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 20:44:52,822 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 20:44:52,822 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 20:44:53,117 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 20:44:53,119 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051692475]
[2020-09-24 20:44:53,122 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 20:44:53,122 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-24 20:44:53,124 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035617539]
[2020-09-24 20:44:53,133 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-24 20:44:53,133 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 20:44:53,160 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-24 20:44:53,162 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-24 20:44:53,166 INFO  L87              Difference]: Start difference. First operand 1123 states. Second operand 5 states.
[2020-09-24 20:45:02,265 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 20:45:02,266 INFO  L93              Difference]: Finished difference Result 2939 states and 3816 transitions.
[2020-09-24 20:45:02,267 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-09-24 20:45:02,268 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 414
[2020-09-24 20:45:02,270 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 20:45:02,308 INFO  L225             Difference]: With dead ends: 2939
[2020-09-24 20:45:02,308 INFO  L226             Difference]: Without dead ends: 1752
[2020-09-24 20:45:02,321 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-09-24 20:45:02,350 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1752 states.
[2020-09-24 20:45:02,485 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1629.
[2020-09-24 20:45:02,487 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1629 states.
[2020-09-24 20:45:02,494 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 1939 transitions.
[2020-09-24 20:45:02,496 INFO  L78                 Accepts]: Start accepts. Automaton has 1629 states and 1939 transitions. Word has length 414
[2020-09-24 20:45:02,498 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 20:45:02,498 INFO  L479      AbstractCegarLoop]: Abstraction has 1629 states and 1939 transitions.
[2020-09-24 20:45:02,498 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-24 20:45:02,498 INFO  L276                IsEmpty]: Start isEmpty. Operand 1629 states and 1939 transitions.
[2020-09-24 20:45:02,508 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 416
[2020-09-24 20:45:02,508 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 20:45:02,509 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 20:45:02,509 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-24 20:45:02,509 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 20:45:02,510 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 20:45:02,510 INFO  L82        PathProgramCache]: Analyzing trace with hash -993206244, now seen corresponding path program 1 times
[2020-09-24 20:45:02,510 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 20:45:02,511 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682288612]
[2020-09-24 20:45:02,511 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 20:45:02,569 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:45:02,634 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:45:02,764 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:45:02,946 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:45:03,103 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:45:03,242 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:45:03,361 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:45:04,536 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:45:06,646 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:45:07,025 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:45:07,574 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:45:07,575 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 422
[2020-09-24 20:45:07,575 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 9
[2020-09-24 20:45:07,575 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5002
[2020-09-24 20:45:07,575 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:45:07,576 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 3
[2020-09-24 20:45:07,576 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 170
[2020-09-24 20:45:07,576 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 72
[2020-09-24 20:45:07,577 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 20:45:08,069 WARN  L193               SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 187
[2020-09-24 20:45:08,070 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 20:45:08,077 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:45:08,087 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:45:08,129 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:45:08,129 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 71
[2020-09-24 20:45:08,129 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 20:45:08,130 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 50
[2020-09-24 20:45:08,130 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:45:08,130 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 20:45:08,131 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 20:45:08,131 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 20:45:08,132 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 20:45:08,393 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 20:45:08,393 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682288612]
[2020-09-24 20:45:08,394 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 20:45:08,394 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-24 20:45:08,394 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863086918]
[2020-09-24 20:45:08,400 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-24 20:45:08,400 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 20:45:08,401 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-24 20:45:08,401 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-24 20:45:08,401 INFO  L87              Difference]: Start difference. First operand 1629 states and 1939 transitions. Second operand 5 states.
[2020-09-24 20:45:15,391 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 20:45:15,391 INFO  L93              Difference]: Finished difference Result 4217 states and 5056 transitions.
[2020-09-24 20:45:15,392 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-09-24 20:45:15,392 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 415
[2020-09-24 20:45:15,395 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 20:45:15,410 INFO  L225             Difference]: With dead ends: 4217
[2020-09-24 20:45:15,410 INFO  L226             Difference]: Without dead ends: 3006
[2020-09-24 20:45:15,414 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-09-24 20:45:15,419 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3006 states.
[2020-09-24 20:45:15,527 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3006 to 2883.
[2020-09-24 20:45:15,527 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2883 states.
[2020-09-24 20:45:15,538 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2883 states to 2883 states and 3462 transitions.
[2020-09-24 20:45:15,538 INFO  L78                 Accepts]: Start accepts. Automaton has 2883 states and 3462 transitions. Word has length 415
[2020-09-24 20:45:15,539 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 20:45:15,539 INFO  L479      AbstractCegarLoop]: Abstraction has 2883 states and 3462 transitions.
[2020-09-24 20:45:15,539 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-24 20:45:15,540 INFO  L276                IsEmpty]: Start isEmpty. Operand 2883 states and 3462 transitions.
[2020-09-24 20:45:15,551 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 417
[2020-09-24 20:45:15,551 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 20:45:15,552 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 20:45:15,552 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-24 20:45:15,553 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 20:45:15,553 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 20:45:15,553 INFO  L82        PathProgramCache]: Analyzing trace with hash -1698938178, now seen corresponding path program 1 times
[2020-09-24 20:45:15,554 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 20:45:15,554 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523083710]
[2020-09-24 20:45:15,554 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 20:45:15,622 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:45:15,698 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:45:15,809 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:45:15,935 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:45:16,068 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:45:16,191 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:45:17,154 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:45:17,536 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:45:17,910 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:45:20,668 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:45:20,668 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 423
[2020-09-24 20:45:20,668 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 8
[2020-09-24 20:45:20,668 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5042
[2020-09-24 20:45:20,669 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:45:20,669 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 3
[2020-09-24 20:45:20,669 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 169
[2020-09-24 20:45:20,669 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 111
[2020-09-24 20:45:20,670 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 20:45:21,093 WARN  L193               SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 187
[2020-09-24 20:45:21,094 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 20:45:21,104 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:45:21,119 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:45:21,155 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:45:21,156 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 71
[2020-09-24 20:45:21,156 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 20:45:21,156 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 50
[2020-09-24 20:45:21,157 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:45:21,157 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 20:45:21,157 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 20:45:21,157 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 20:45:21,157 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 20:45:21,321 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 20:45:21,322 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523083710]
[2020-09-24 20:45:21,322 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 20:45:21,322 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-24 20:45:21,323 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641534478]
[2020-09-24 20:45:21,324 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-24 20:45:21,324 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 20:45:21,325 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-24 20:45:21,325 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-24 20:45:21,325 INFO  L87              Difference]: Start difference. First operand 2883 states and 3462 transitions. Second operand 5 states.
[2020-09-24 20:45:27,783 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 20:45:27,784 INFO  L93              Difference]: Finished difference Result 8007 states and 9638 transitions.
[2020-09-24 20:45:27,785 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-09-24 20:45:27,785 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 416
[2020-09-24 20:45:27,785 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 20:45:27,807 INFO  L225             Difference]: With dead ends: 8007
[2020-09-24 20:45:27,807 INFO  L226             Difference]: Without dead ends: 5392
[2020-09-24 20:45:27,813 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-09-24 20:45:27,819 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5392 states.
[2020-09-24 20:45:27,986 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5392 to 5269.
[2020-09-24 20:45:27,987 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 5269 states.
[2020-09-24 20:45:28,003 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5269 states to 5269 states and 6328 transitions.
[2020-09-24 20:45:28,004 INFO  L78                 Accepts]: Start accepts. Automaton has 5269 states and 6328 transitions. Word has length 416
[2020-09-24 20:45:28,004 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 20:45:28,004 INFO  L479      AbstractCegarLoop]: Abstraction has 5269 states and 6328 transitions.
[2020-09-24 20:45:28,004 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-24 20:45:28,005 INFO  L276                IsEmpty]: Start isEmpty. Operand 5269 states and 6328 transitions.
[2020-09-24 20:45:28,021 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 418
[2020-09-24 20:45:28,022 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 20:45:28,022 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 20:45:28,022 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-24 20:45:28,024 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 20:45:28,028 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 20:45:28,028 INFO  L82        PathProgramCache]: Analyzing trace with hash -1652108032, now seen corresponding path program 1 times
[2020-09-24 20:45:28,029 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 20:45:28,029 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479249649]
[2020-09-24 20:45:28,030 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 20:45:28,081 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:45:28,141 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:45:28,269 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:45:28,407 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:45:28,533 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:45:28,648 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:45:29,719 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:45:30,208 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:45:30,496 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:45:30,926 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:45:31,217 FATAL L256   erpolLogProxyWrapper]: Now shrinking...