/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/list-2.i


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


This is Ultimate 0.1.25-c90d42b
[2020-09-25 12:18:44,795 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-09-25 12:18:44,799 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-25 12:18:44,842 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-25 12:18:44,843 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-25 12:18:44,855 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-25 12:18:44,857 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-25 12:18:44,860 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-25 12:18:44,863 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-25 12:18:44,865 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-09-25 12:18:44,867 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-09-25 12:18:44,870 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-25 12:18:44,871 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-25 12:18:44,876 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-25 12:18:44,881 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-25 12:18:44,883 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-25 12:18:44,885 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-25 12:18:44,888 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-25 12:18:44,890 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-25 12:18:44,898 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-25 12:18:44,902 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-25 12:18:44,903 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-25 12:18:44,904 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-09-25 12:18:44,905 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-25 12:18:44,909 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-25 12:18:44,909 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-25 12:18:44,910 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-25 12:18:44,914 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-25 12:18:44,915 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-25 12:18:44,917 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-25 12:18:44,917 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-25 12:18:44,918 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-25 12:18:44,919 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-25 12:18:44,920 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-25 12:18:44,922 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-25 12:18:44,922 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-25 12:18:44,923 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-09-25 12:18:44,923 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-09-25 12:18:44,923 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-09-25 12:18:44,924 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-09-25 12:18:44,926 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-09-25 12:18:44,927 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
[2020-09-25 12:18:44,985 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-09-25 12:18:44,985 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-25 12:18:44,988 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-25 12:18:44,988 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-09-25 12:18:44,988 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-09-25 12:18:44,989 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-25 12:18:44,989 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-09-25 12:18:44,989 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-09-25 12:18:44,989 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-09-25 12:18:44,990 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-09-25 12:18:44,991 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-09-25 12:18:44,991 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-25 12:18:44,991 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-09-25 12:18:44,991 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-09-25 12:18:44,992 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-09-25 12:18:44,992 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-09-25 12:18:44,992 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-09-25 12:18:44,993 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-25 12:18:44,993 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-09-25 12:18:44,993 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-09-25 12:18:44,993 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-09-25 12:18:44,993 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-25 12:18:44,994 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-25 12:18:44,994 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-09-25 12:18:44,994 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-25 12:18:44,994 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-09-25 12:18:44,995 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-25 12:18:44,995 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-25 12:18:44,995 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-09-25 12:18:44,995 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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;
[2020-09-25 12:18:45,443 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-25 12:18:45,461 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-25 12:18:45,466 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-25 12:18:45,468 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-09-25 12:18:45,468 INFO  L275        PluginConnector]: CDTParser initialized
[2020-09-25 12:18:45,469 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list-2.i
[2020-09-25 12:18:45,563 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0f159be1a/0dce93738b204df380b32f96baa272b5/FLAG505ec4c69
[2020-09-25 12:18:46,130 INFO  L306              CDTParser]: Found 1 translation units.
[2020-09-25 12:18:46,131 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/list-2.i
[2020-09-25 12:18:46,146 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0f159be1a/0dce93738b204df380b32f96baa272b5/FLAG505ec4c69
[2020-09-25 12:18:46,401 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0f159be1a/0dce93738b204df380b32f96baa272b5
[2020-09-25 12:18:46,415 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-25 12:18:46,421 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-25 12:18:46,422 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-25 12:18:46,422 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-25 12:18:46,426 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-25 12:18:46,428 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:18:46" (1/1) ...
[2020-09-25 12:18:46,432 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b2939e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:46, skipping insertion in model container
[2020-09-25 12:18:46,432 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:18:46" (1/1) ...
[2020-09-25 12:18:46,442 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-09-25 12:18:46,488 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-09-25 12:18:47,006 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-25 12:18:47,029 INFO  L203         MainTranslator]: Completed pre-run
[2020-09-25 12:18:47,083 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-25 12:18:47,152 INFO  L208         MainTranslator]: Completed translation
[2020-09-25 12:18:47,152 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:47 WrapperNode
[2020-09-25 12:18:47,153 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-25 12:18:47,155 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-25 12:18:47,155 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-25 12:18:47,155 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-09-25 12:18:47,175 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:47" (1/1) ...
[2020-09-25 12:18:47,175 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:47" (1/1) ...
[2020-09-25 12:18:47,193 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:47" (1/1) ...
[2020-09-25 12:18:47,194 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:47" (1/1) ...
[2020-09-25 12:18:47,213 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:47" (1/1) ...
[2020-09-25 12:18:47,220 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:47" (1/1) ...
[2020-09-25 12:18:47,224 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:47" (1/1) ...
[2020-09-25 12:18:47,231 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-25 12:18:47,232 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-25 12:18:47,232 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-09-25 12:18:47,233 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-09-25 12:18:47,234 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:47" (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
[2020-09-25 12:18:47,321 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-25 12:18:47,321 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-25 12:18:47,321 INFO  L138     BoogieDeclarations]: Found implementation of procedure __bswap_32
[2020-09-25 12:18:47,321 INFO  L138     BoogieDeclarations]: Found implementation of procedure __bswap_64
[2020-09-25 12:18:47,321 INFO  L138     BoogieDeclarations]: Found implementation of procedure __uint16_identity
[2020-09-25 12:18:47,322 INFO  L138     BoogieDeclarations]: Found implementation of procedure __uint32_identity
[2020-09-25 12:18:47,322 INFO  L138     BoogieDeclarations]: Found implementation of procedure __uint64_identity
[2020-09-25 12:18:47,322 INFO  L138     BoogieDeclarations]: Found implementation of procedure myexit
[2020-09-25 12:18:47,322 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-09-25 12:18:47,323 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-25 12:18:47,323 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-09-25 12:18:47,323 INFO  L130     BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max
[2020-09-25 12:18:47,323 INFO  L130     BoogieDeclarations]: Found specification of procedure atof
[2020-09-25 12:18:47,323 INFO  L130     BoogieDeclarations]: Found specification of procedure atoi
[2020-09-25 12:18:47,323 INFO  L130     BoogieDeclarations]: Found specification of procedure atol
[2020-09-25 12:18:47,324 INFO  L130     BoogieDeclarations]: Found specification of procedure atoll
[2020-09-25 12:18:47,324 INFO  L130     BoogieDeclarations]: Found specification of procedure strtod
[2020-09-25 12:18:47,324 INFO  L130     BoogieDeclarations]: Found specification of procedure strtof
[2020-09-25 12:18:47,324 INFO  L130     BoogieDeclarations]: Found specification of procedure strtold
[2020-09-25 12:18:47,325 INFO  L130     BoogieDeclarations]: Found specification of procedure strtol
[2020-09-25 12:18:47,325 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoul
[2020-09-25 12:18:47,325 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoq
[2020-09-25 12:18:47,325 INFO  L130     BoogieDeclarations]: Found specification of procedure strtouq
[2020-09-25 12:18:47,325 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoll
[2020-09-25 12:18:47,325 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoull
[2020-09-25 12:18:47,326 INFO  L130     BoogieDeclarations]: Found specification of procedure l64a
[2020-09-25 12:18:47,326 INFO  L130     BoogieDeclarations]: Found specification of procedure a64l
[2020-09-25 12:18:47,326 INFO  L130     BoogieDeclarations]: Found specification of procedure __bswap_32
[2020-09-25 12:18:47,326 INFO  L130     BoogieDeclarations]: Found specification of procedure __bswap_64
[2020-09-25 12:18:47,326 INFO  L130     BoogieDeclarations]: Found specification of procedure __uint16_identity
[2020-09-25 12:18:47,326 INFO  L130     BoogieDeclarations]: Found specification of procedure __uint32_identity
[2020-09-25 12:18:47,327 INFO  L130     BoogieDeclarations]: Found specification of procedure __uint64_identity
[2020-09-25 12:18:47,327 INFO  L130     BoogieDeclarations]: Found specification of procedure select
[2020-09-25 12:18:47,327 INFO  L130     BoogieDeclarations]: Found specification of procedure pselect
[2020-09-25 12:18:47,327 INFO  L130     BoogieDeclarations]: Found specification of procedure gnu_dev_major
[2020-09-25 12:18:47,327 INFO  L130     BoogieDeclarations]: Found specification of procedure gnu_dev_minor
[2020-09-25 12:18:47,327 INFO  L130     BoogieDeclarations]: Found specification of procedure gnu_dev_makedev
[2020-09-25 12:18:47,328 INFO  L130     BoogieDeclarations]: Found specification of procedure random
[2020-09-25 12:18:47,328 INFO  L130     BoogieDeclarations]: Found specification of procedure srandom
[2020-09-25 12:18:47,328 INFO  L130     BoogieDeclarations]: Found specification of procedure initstate
[2020-09-25 12:18:47,328 INFO  L130     BoogieDeclarations]: Found specification of procedure setstate
[2020-09-25 12:18:47,328 INFO  L130     BoogieDeclarations]: Found specification of procedure random_r
[2020-09-25 12:18:47,328 INFO  L130     BoogieDeclarations]: Found specification of procedure srandom_r
[2020-09-25 12:18:47,329 INFO  L130     BoogieDeclarations]: Found specification of procedure initstate_r
[2020-09-25 12:18:47,329 INFO  L130     BoogieDeclarations]: Found specification of procedure setstate_r
[2020-09-25 12:18:47,329 INFO  L130     BoogieDeclarations]: Found specification of procedure rand
[2020-09-25 12:18:47,329 INFO  L130     BoogieDeclarations]: Found specification of procedure srand
[2020-09-25 12:18:47,329 INFO  L130     BoogieDeclarations]: Found specification of procedure rand_r
[2020-09-25 12:18:47,329 INFO  L130     BoogieDeclarations]: Found specification of procedure drand48
[2020-09-25 12:18:47,330 INFO  L130     BoogieDeclarations]: Found specification of procedure erand48
[2020-09-25 12:18:47,330 INFO  L130     BoogieDeclarations]: Found specification of procedure lrand48
[2020-09-25 12:18:47,330 INFO  L130     BoogieDeclarations]: Found specification of procedure nrand48
[2020-09-25 12:18:47,330 INFO  L130     BoogieDeclarations]: Found specification of procedure mrand48
[2020-09-25 12:18:47,330 INFO  L130     BoogieDeclarations]: Found specification of procedure jrand48
[2020-09-25 12:18:47,330 INFO  L130     BoogieDeclarations]: Found specification of procedure srand48
[2020-09-25 12:18:47,331 INFO  L130     BoogieDeclarations]: Found specification of procedure seed48
[2020-09-25 12:18:47,331 INFO  L130     BoogieDeclarations]: Found specification of procedure lcong48
[2020-09-25 12:18:47,331 INFO  L130     BoogieDeclarations]: Found specification of procedure drand48_r
[2020-09-25 12:18:47,331 INFO  L130     BoogieDeclarations]: Found specification of procedure erand48_r
[2020-09-25 12:18:47,331 INFO  L130     BoogieDeclarations]: Found specification of procedure lrand48_r
[2020-09-25 12:18:47,332 INFO  L130     BoogieDeclarations]: Found specification of procedure nrand48_r
[2020-09-25 12:18:47,332 INFO  L130     BoogieDeclarations]: Found specification of procedure mrand48_r
[2020-09-25 12:18:47,332 INFO  L130     BoogieDeclarations]: Found specification of procedure jrand48_r
[2020-09-25 12:18:47,332 INFO  L130     BoogieDeclarations]: Found specification of procedure srand48_r
[2020-09-25 12:18:47,332 INFO  L130     BoogieDeclarations]: Found specification of procedure seed48_r
[2020-09-25 12:18:47,332 INFO  L130     BoogieDeclarations]: Found specification of procedure lcong48_r
[2020-09-25 12:18:47,333 INFO  L130     BoogieDeclarations]: Found specification of procedure malloc
[2020-09-25 12:18:47,333 INFO  L130     BoogieDeclarations]: Found specification of procedure calloc
[2020-09-25 12:18:47,333 INFO  L130     BoogieDeclarations]: Found specification of procedure realloc
[2020-09-25 12:18:47,333 INFO  L130     BoogieDeclarations]: Found specification of procedure free
[2020-09-25 12:18:47,333 INFO  L130     BoogieDeclarations]: Found specification of procedure alloca
[2020-09-25 12:18:47,333 INFO  L130     BoogieDeclarations]: Found specification of procedure valloc
[2020-09-25 12:18:47,333 INFO  L130     BoogieDeclarations]: Found specification of procedure posix_memalign
[2020-09-25 12:18:47,334 INFO  L130     BoogieDeclarations]: Found specification of procedure aligned_alloc
[2020-09-25 12:18:47,334 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-09-25 12:18:47,334 INFO  L130     BoogieDeclarations]: Found specification of procedure atexit
[2020-09-25 12:18:47,334 INFO  L130     BoogieDeclarations]: Found specification of procedure at_quick_exit
[2020-09-25 12:18:47,334 INFO  L130     BoogieDeclarations]: Found specification of procedure on_exit
[2020-09-25 12:18:47,334 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2020-09-25 12:18:47,335 INFO  L130     BoogieDeclarations]: Found specification of procedure quick_exit
[2020-09-25 12:18:47,335 INFO  L130     BoogieDeclarations]: Found specification of procedure _Exit
[2020-09-25 12:18:47,335 INFO  L130     BoogieDeclarations]: Found specification of procedure getenv
[2020-09-25 12:18:47,335 INFO  L130     BoogieDeclarations]: Found specification of procedure putenv
[2020-09-25 12:18:47,335 INFO  L130     BoogieDeclarations]: Found specification of procedure setenv
[2020-09-25 12:18:47,336 INFO  L130     BoogieDeclarations]: Found specification of procedure unsetenv
[2020-09-25 12:18:47,336 INFO  L130     BoogieDeclarations]: Found specification of procedure clearenv
[2020-09-25 12:18:47,336 INFO  L130     BoogieDeclarations]: Found specification of procedure mktemp
[2020-09-25 12:18:47,336 INFO  L130     BoogieDeclarations]: Found specification of procedure mkstemp
[2020-09-25 12:18:47,336 INFO  L130     BoogieDeclarations]: Found specification of procedure mkstemps
[2020-09-25 12:18:47,336 INFO  L130     BoogieDeclarations]: Found specification of procedure mkdtemp
[2020-09-25 12:18:47,336 INFO  L130     BoogieDeclarations]: Found specification of procedure system
[2020-09-25 12:18:47,337 INFO  L130     BoogieDeclarations]: Found specification of procedure realpath
[2020-09-25 12:18:47,337 INFO  L130     BoogieDeclarations]: Found specification of procedure bsearch
[2020-09-25 12:18:47,337 INFO  L130     BoogieDeclarations]: Found specification of procedure qsort
[2020-09-25 12:18:47,337 INFO  L130     BoogieDeclarations]: Found specification of procedure abs
[2020-09-25 12:18:47,337 INFO  L130     BoogieDeclarations]: Found specification of procedure labs
[2020-09-25 12:18:47,337 INFO  L130     BoogieDeclarations]: Found specification of procedure llabs
[2020-09-25 12:18:47,338 INFO  L130     BoogieDeclarations]: Found specification of procedure div
[2020-09-25 12:18:47,338 INFO  L130     BoogieDeclarations]: Found specification of procedure ldiv
[2020-09-25 12:18:47,338 INFO  L130     BoogieDeclarations]: Found specification of procedure lldiv
[2020-09-25 12:18:47,338 INFO  L130     BoogieDeclarations]: Found specification of procedure ecvt
[2020-09-25 12:18:47,338 INFO  L130     BoogieDeclarations]: Found specification of procedure fcvt
[2020-09-25 12:18:47,338 INFO  L130     BoogieDeclarations]: Found specification of procedure gcvt
[2020-09-25 12:18:47,338 INFO  L130     BoogieDeclarations]: Found specification of procedure qecvt
[2020-09-25 12:18:47,339 INFO  L130     BoogieDeclarations]: Found specification of procedure qfcvt
[2020-09-25 12:18:47,339 INFO  L130     BoogieDeclarations]: Found specification of procedure qgcvt
[2020-09-25 12:18:47,339 INFO  L130     BoogieDeclarations]: Found specification of procedure ecvt_r
[2020-09-25 12:18:47,339 INFO  L130     BoogieDeclarations]: Found specification of procedure fcvt_r
[2020-09-25 12:18:47,339 INFO  L130     BoogieDeclarations]: Found specification of procedure qecvt_r
[2020-09-25 12:18:47,339 INFO  L130     BoogieDeclarations]: Found specification of procedure qfcvt_r
[2020-09-25 12:18:47,340 INFO  L130     BoogieDeclarations]: Found specification of procedure mblen
[2020-09-25 12:18:47,340 INFO  L130     BoogieDeclarations]: Found specification of procedure mbtowc
[2020-09-25 12:18:47,340 INFO  L130     BoogieDeclarations]: Found specification of procedure wctomb
[2020-09-25 12:18:47,340 INFO  L130     BoogieDeclarations]: Found specification of procedure mbstowcs
[2020-09-25 12:18:47,340 INFO  L130     BoogieDeclarations]: Found specification of procedure wcstombs
[2020-09-25 12:18:47,340 INFO  L130     BoogieDeclarations]: Found specification of procedure rpmatch
[2020-09-25 12:18:47,341 INFO  L130     BoogieDeclarations]: Found specification of procedure getsubopt
[2020-09-25 12:18:47,341 INFO  L130     BoogieDeclarations]: Found specification of procedure getloadavg
[2020-09-25 12:18:47,341 INFO  L130     BoogieDeclarations]: Found specification of procedure myexit
[2020-09-25 12:18:47,341 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-09-25 12:18:47,341 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2020-09-25 12:18:47,341 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2020-09-25 12:18:47,342 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2020-09-25 12:18:47,342 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2020-09-25 12:18:47,342 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2020-09-25 12:18:47,342 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-25 12:18:47,342 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-25 12:18:47,343 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-09-25 12:18:47,729 INFO  L732   $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true;
[2020-09-25 12:18:47,966 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-25 12:18:47,967 INFO  L295             CfgBuilder]: Removed 4 assume(true) statements.
[2020-09-25 12:18:47,972 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:18:47 BoogieIcfgContainer
[2020-09-25 12:18:47,972 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-25 12:18:47,974 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-25 12:18:47,974 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-09-25 12:18:47,977 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-09-25 12:18:47,978 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:18:46" (1/3) ...
[2020-09-25 12:18:47,979 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23c5abbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:18:47, skipping insertion in model container
[2020-09-25 12:18:47,979 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:47" (2/3) ...
[2020-09-25 12:18:47,979 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23c5abbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:18:47, skipping insertion in model container
[2020-09-25 12:18:47,980 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:18:47" (3/3) ...
[2020-09-25 12:18:47,982 INFO  L109   eAbstractionObserver]: Analyzing ICFG list-2.i
[2020-09-25 12:18:47,994 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-25 12:18:48,006 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-25 12:18:48,026 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-25 12:18:48,054 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-09-25 12:18:48,054 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-09-25 12:18:48,055 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-25 12:18:48,055 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-25 12:18:48,055 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-25 12:18:48,055 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-09-25 12:18:48,055 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-25 12:18:48,055 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-25 12:18:48,077 INFO  L276                IsEmpty]: Start isEmpty. Operand 68 states.
[2020-09-25 12:18:48,087 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2020-09-25 12:18:48,087 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 12:18:48,088 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 12:18:48,089 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 12:18:48,096 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 12:18:48,096 INFO  L82        PathProgramCache]: Analyzing trace with hash 1227115345, now seen corresponding path program 1 times
[2020-09-25 12:18:48,108 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 12:18:48,109 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620560816]
[2020-09-25 12:18:48,109 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 12:18:48,255 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 12:18:48,289 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:18:48,338 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:18:48,366 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:18:48,462 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:18:48,550 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:18:48,859 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 12:18:48,860 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 29
[2020-09-25 12:18:48,860 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 5
[2020-09-25 12:18:48,860 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 597
[2020-09-25 12:18:48,864 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 12:18:48,864 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-09-25 12:18:48,865 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 5
[2020-09-25 12:18:48,865 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 18
[2020-09-25 12:18:48,865 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 9
[2020-09-25 12:18:48,865 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 4
[2020-09-25 12:18:48,997 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 12:18:49,000 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 12:18:49,003 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:18:49,022 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 12:18:49,022 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-25 12:18:49,023 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 12:18:49,023 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 21
[2020-09-25 12:18:49,023 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 12:18:49,023 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-09-25 12:18:49,024 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 12:18:49,024 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 12:18:49,024 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 12:18:49,024 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 12:18:49,043 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 12:18:49,045 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620560816]
[2020-09-25 12:18:49,047 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-25 12:18:49,048 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2020-09-25 12:18:49,049 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457717279]
[2020-09-25 12:18:49,055 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-09-25 12:18:49,056 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 12:18:49,074 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-09-25 12:18:49,076 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2020-09-25 12:18:49,079 INFO  L87              Difference]: Start difference. First operand 68 states. Second operand 7 states.
[2020-09-25 12:18:49,540 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 12:18:49,540 INFO  L93              Difference]: Finished difference Result 198 states and 237 transitions.
[2020-09-25 12:18:49,541 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2020-09-25 12:18:49,543 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 22
[2020-09-25 12:18:49,543 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 12:18:49,557 INFO  L225             Difference]: With dead ends: 198
[2020-09-25 12:18:49,557 INFO  L226             Difference]: Without dead ends: 128
[2020-09-25 12:18:49,563 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110
[2020-09-25 12:18:49,588 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 128 states.
[2020-09-25 12:18:49,620 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 70.
[2020-09-25 12:18:49,622 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 70 states.
[2020-09-25 12:18:49,624 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions.
[2020-09-25 12:18:49,626 INFO  L78                 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 22
[2020-09-25 12:18:49,626 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-25 12:18:49,627 INFO  L479      AbstractCegarLoop]: Abstraction has 70 states and 76 transitions.
[2020-09-25 12:18:49,627 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-09-25 12:18:49,627 INFO  L276                IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions.
[2020-09-25 12:18:49,629 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 37
[2020-09-25 12:18:49,629 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 12:18:49,629 INFO  L422         BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 12:18:49,630 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-25 12:18:49,630 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 12:18:49,630 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 12:18:49,630 INFO  L82        PathProgramCache]: Analyzing trace with hash 1213729417, now seen corresponding path program 1 times
[2020-09-25 12:18:49,631 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 12:18:49,631 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292784982]
[2020-09-25 12:18:49,631 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 12:18:49,651 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 12:18:49,663 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:18:49,805 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 12:18:49,805 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 43
[2020-09-25 12:18:49,805 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 12:18:49,805 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 153
[2020-09-25 12:18:49,806 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 12:18:49,806 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-09-25 12:18:49,806 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 5
[2020-09-25 12:18:49,806 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 18
[2020-09-25 12:18:49,807 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 14
[2020-09-25 12:18:49,807 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 12:18:49,877 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 12:18:49,879 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 12:18:49,882 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:18:49,890 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 12:18:49,891 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-25 12:18:49,891 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 12:18:49,891 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 10
[2020-09-25 12:18:49,891 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 12:18:49,892 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-09-25 12:18:49,892 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 12:18:49,892 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 12:18:49,892 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 12:18:49,893 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 12:18:49,900 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 12:18:49,901 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292784982]
[2020-09-25 12:18:49,901 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-25 12:18:49,901 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2020-09-25 12:18:49,902 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718573329]
[2020-09-25 12:18:49,904 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-09-25 12:18:49,904 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 12:18:49,905 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-09-25 12:18:49,905 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2020-09-25 12:18:49,905 INFO  L87              Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 7 states.
[2020-09-25 12:18:50,177 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 12:18:50,178 INFO  L93              Difference]: Finished difference Result 137 states and 145 transitions.
[2020-09-25 12:18:50,178 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2020-09-25 12:18:50,178 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 36
[2020-09-25 12:18:50,179 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 12:18:50,181 INFO  L225             Difference]: With dead ends: 137
[2020-09-25 12:18:50,181 INFO  L226             Difference]: Without dead ends: 122
[2020-09-25 12:18:50,182 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72
[2020-09-25 12:18:50,183 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 122 states.
[2020-09-25 12:18:50,191 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 67.
[2020-09-25 12:18:50,216 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 67 states.
[2020-09-25 12:18:50,220 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions.
[2020-09-25 12:18:50,220 INFO  L78                 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 36
[2020-09-25 12:18:50,221 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-25 12:18:50,221 INFO  L479      AbstractCegarLoop]: Abstraction has 67 states and 72 transitions.
[2020-09-25 12:18:50,222 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-09-25 12:18:50,222 INFO  L276                IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions.
[2020-09-25 12:18:50,224 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 37
[2020-09-25 12:18:50,224 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 12:18:50,225 INFO  L422         BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 12:18:50,226 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-25 12:18:50,226 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 12:18:50,226 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 12:18:50,227 INFO  L82        PathProgramCache]: Analyzing trace with hash -2044556103, now seen corresponding path program 1 times
[2020-09-25 12:18:50,227 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 12:18:50,227 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150095703]
[2020-09-25 12:18:50,228 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 12:18:50,254 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 12:18:50,268 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:18:50,418 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 12:18:50,418 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 43
[2020-09-25 12:18:50,418 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 12:18:50,419 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 162
[2020-09-25 12:18:50,419 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 12:18:50,419 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-09-25 12:18:50,419 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 5
[2020-09-25 12:18:50,420 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 18
[2020-09-25 12:18:50,420 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 11
[2020-09-25 12:18:50,420 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 12:18:50,487 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 12:18:50,490 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 12:18:50,492 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:18:50,504 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 12:18:50,504 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-25 12:18:50,504 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 12:18:50,504 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 12
[2020-09-25 12:18:50,505 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 12:18:50,505 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-09-25 12:18:50,505 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 12:18:50,505 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 12:18:50,506 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 12:18:50,506 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 12:18:50,512 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 12:18:50,513 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150095703]
[2020-09-25 12:18:50,513 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-25 12:18:50,513 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2020-09-25 12:18:50,513 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413074449]
[2020-09-25 12:18:50,514 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-09-25 12:18:50,515 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 12:18:50,515 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-09-25 12:18:50,515 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2020-09-25 12:18:50,516 INFO  L87              Difference]: Start difference. First operand 67 states and 72 transitions. Second operand 7 states.
[2020-09-25 12:18:50,740 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 12:18:50,740 INFO  L93              Difference]: Finished difference Result 119 states and 126 transitions.
[2020-09-25 12:18:50,740 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-09-25 12:18:50,740 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 36
[2020-09-25 12:18:50,741 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 12:18:50,742 INFO  L225             Difference]: With dead ends: 119
[2020-09-25 12:18:50,742 INFO  L226             Difference]: Without dead ends: 95
[2020-09-25 12:18:50,743 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72
[2020-09-25 12:18:50,744 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 95 states.
[2020-09-25 12:18:50,752 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 62.
[2020-09-25 12:18:50,757 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 62 states.
[2020-09-25 12:18:50,757 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions.
[2020-09-25 12:18:50,758 INFO  L78                 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 36
[2020-09-25 12:18:50,758 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-25 12:18:50,758 INFO  L479      AbstractCegarLoop]: Abstraction has 62 states and 66 transitions.
[2020-09-25 12:18:50,758 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-09-25 12:18:50,758 INFO  L276                IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions.
[2020-09-25 12:18:50,759 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 42
[2020-09-25 12:18:50,760 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 12:18:50,761 INFO  L422         BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 12:18:50,761 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-25 12:18:50,761 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 12:18:50,761 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 12:18:50,761 INFO  L82        PathProgramCache]: Analyzing trace with hash -833752717, now seen corresponding path program 1 times
[2020-09-25 12:18:50,762 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 12:18:50,762 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105529121]
[2020-09-25 12:18:50,762 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 12:18:50,795 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 12:18:50,821 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:18:51,018 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:18:51,901 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 12:18:51,901 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 48
[2020-09-25 12:18:51,902 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-25 12:18:51,902 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1103
[2020-09-25 12:18:51,902 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 12:18:51,902 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-09-25 12:18:51,903 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 9
[2020-09-25 12:18:51,903 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 18
[2020-09-25 12:18:51,903 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 28
[2020-09-25 12:18:51,904 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 12:18:52,082 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 12:18:52,084 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 12:18:52,086 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:18:52,095 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 12:18:52,095 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-25 12:18:52,096 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 12:18:52,096 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 10
[2020-09-25 12:18:52,096 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 12:18:52,097 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-09-25 12:18:52,097 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 12:18:52,097 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 12:18:52,098 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 12:18:52,098 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 12:18:52,110 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 12:18:52,110 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105529121]
[2020-09-25 12:18:52,110 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 12:18:52,111 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11
[2020-09-25 12:18:52,111 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290612238]
[2020-09-25 12:18:52,111 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 11 states
[2020-09-25 12:18:52,112 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 12:18:52,112 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2020-09-25 12:18:52,112 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2020-09-25 12:18:52,112 INFO  L87              Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 11 states.
[2020-09-25 12:18:52,758 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 12:18:52,759 INFO  L93              Difference]: Finished difference Result 143 states and 151 transitions.
[2020-09-25 12:18:52,759 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. 
[2020-09-25 12:18:52,759 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 41
[2020-09-25 12:18:52,760 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 12:18:52,761 INFO  L225             Difference]: With dead ends: 143
[2020-09-25 12:18:52,761 INFO  L226             Difference]: Without dead ends: 137
[2020-09-25 12:18:52,762 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342
[2020-09-25 12:18:52,762 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 137 states.
[2020-09-25 12:18:52,769 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 81.
[2020-09-25 12:18:52,770 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 81 states.
[2020-09-25 12:18:52,770 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions.
[2020-09-25 12:18:52,771 INFO  L78                 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 41
[2020-09-25 12:18:52,771 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-25 12:18:52,771 INFO  L479      AbstractCegarLoop]: Abstraction has 81 states and 87 transitions.
[2020-09-25 12:18:52,771 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2020-09-25 12:18:52,772 INFO  L276                IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions.
[2020-09-25 12:18:52,773 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 42
[2020-09-25 12:18:52,773 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 12:18:52,773 INFO  L422         BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 12:18:52,773 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-09-25 12:18:52,774 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 12:18:52,774 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 12:18:52,774 INFO  L82        PathProgramCache]: Analyzing trace with hash 865863745, now seen corresponding path program 1 times
[2020-09-25 12:18:52,774 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 12:18:52,775 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735890510]
[2020-09-25 12:18:52,775 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 12:18:52,793 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 12:18:52,809 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:18:52,982 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:18:53,718 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 12:18:53,719 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 48
[2020-09-25 12:18:53,719 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-25 12:18:53,719 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 924
[2020-09-25 12:18:53,720 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 12:18:53,720 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-09-25 12:18:53,720 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 9
[2020-09-25 12:18:53,720 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 18
[2020-09-25 12:18:53,721 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 28
[2020-09-25 12:18:53,721 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 12:18:53,881 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 12:18:53,883 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 12:18:53,885 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:18:53,891 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 12:18:53,891 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-25 12:18:53,892 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 12:18:53,892 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 7
[2020-09-25 12:18:53,892 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 12:18:53,892 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-09-25 12:18:53,892 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 12:18:53,893 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 12:18:53,893 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 12:18:53,893 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 12:18:53,900 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 12:18:53,901 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735890510]
[2020-09-25 12:18:53,901 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 12:18:53,901 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11
[2020-09-25 12:18:53,902 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271252636]
[2020-09-25 12:18:53,902 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 11 states
[2020-09-25 12:18:53,902 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 12:18:53,902 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2020-09-25 12:18:53,903 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110
[2020-09-25 12:18:53,903 INFO  L87              Difference]: Start difference. First operand 81 states and 87 transitions. Second operand 11 states.
[2020-09-25 12:18:54,486 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 12:18:54,486 INFO  L93              Difference]: Finished difference Result 159 states and 170 transitions.
[2020-09-25 12:18:54,487 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. 
[2020-09-25 12:18:54,487 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 41
[2020-09-25 12:18:54,487 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 12:18:54,488 INFO  L225             Difference]: With dead ends: 159
[2020-09-25 12:18:54,489 INFO  L226             Difference]: Without dead ends: 153
[2020-09-25 12:18:54,489 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380
[2020-09-25 12:18:54,490 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 153 states.
[2020-09-25 12:18:54,496 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 93.
[2020-09-25 12:18:54,496 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 93 states.
[2020-09-25 12:18:54,497 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions.
[2020-09-25 12:18:54,497 INFO  L78                 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 41
[2020-09-25 12:18:54,498 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-25 12:18:54,498 INFO  L479      AbstractCegarLoop]: Abstraction has 93 states and 100 transitions.
[2020-09-25 12:18:54,498 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2020-09-25 12:18:54,498 INFO  L276                IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions.
[2020-09-25 12:18:54,499 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 48
[2020-09-25 12:18:54,499 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 12:18:54,500 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 12:18:54,500 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-09-25 12:18:54,500 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 12:18:54,500 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 12:18:54,501 INFO  L82        PathProgramCache]: Analyzing trace with hash -2114514645, now seen corresponding path program 1 times
[2020-09-25 12:18:54,501 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 12:18:54,501 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874329150]
[2020-09-25 12:18:54,501 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 12:18:54,521 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 12:18:54,539 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:18:54,675 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:18:55,253 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:18:56,098 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:18:57,216 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 12:18:57,217 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 54
[2020-09-25 12:18:57,217 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 4
[2020-09-25 12:18:57,217 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 2694
[2020-09-25 12:18:57,218 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 12:18:57,218 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-09-25 12:18:57,218 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 13
[2020-09-25 12:18:57,219 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 18
[2020-09-25 12:18:57,219 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 34
[2020-09-25 12:18:57,219 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 12:18:57,574 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 12:18:57,575 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 12:18:57,577 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:18:57,585 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 12:18:57,585 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-25 12:18:57,585 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 12:18:57,585 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 9
[2020-09-25 12:18:57,586 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 12:18:57,586 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-09-25 12:18:57,586 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 12:18:57,586 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 12:18:57,586 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 12:18:57,587 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 12:18:57,600 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 12:18:57,601 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874329150]
[2020-09-25 12:18:57,602 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 12:18:57,602 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14
[2020-09-25 12:18:57,602 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097928855]
[2020-09-25 12:18:57,603 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 14 states
[2020-09-25 12:18:57,603 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 12:18:57,603 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2020-09-25 12:18:57,603 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182
[2020-09-25 12:18:57,604 INFO  L87              Difference]: Start difference. First operand 93 states and 100 transitions. Second operand 14 states.
[2020-09-25 12:18:58,473 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 12:18:58,474 INFO  L93              Difference]: Finished difference Result 163 states and 174 transitions.
[2020-09-25 12:18:58,474 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. 
[2020-09-25 12:18:58,474 INFO  L78                 Accepts]: Start accepts. Automaton has 14 states. Word has length 47
[2020-09-25 12:18:58,475 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 12:18:58,476 INFO  L225             Difference]: With dead ends: 163
[2020-09-25 12:18:58,476 INFO  L226             Difference]: Without dead ends: 157
[2020-09-25 12:18:58,477 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756
[2020-09-25 12:18:58,477 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 157 states.
[2020-09-25 12:18:58,488 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 107.
[2020-09-25 12:18:58,490 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 107 states.
[2020-09-25 12:18:58,493 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 116 transitions.
[2020-09-25 12:18:58,493 INFO  L78                 Accepts]: Start accepts. Automaton has 107 states and 116 transitions. Word has length 47
[2020-09-25 12:18:58,493 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-25 12:18:58,493 INFO  L479      AbstractCegarLoop]: Abstraction has 107 states and 116 transitions.
[2020-09-25 12:18:58,494 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 14 states.
[2020-09-25 12:18:58,494 INFO  L276                IsEmpty]: Start isEmpty. Operand 107 states and 116 transitions.
[2020-09-25 12:18:58,497 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 48
[2020-09-25 12:18:58,498 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 12:18:58,498 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 12:18:58,499 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-09-25 12:18:58,499 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 12:18:58,499 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 12:18:58,499 INFO  L82        PathProgramCache]: Analyzing trace with hash -1077832869, now seen corresponding path program 1 times
[2020-09-25 12:18:58,499 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 12:18:58,501 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917071777]
[2020-09-25 12:18:58,501 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 12:18:58,522 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 12:18:58,556 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:18:59,085 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 12:18:59,085 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 54
[2020-09-25 12:18:59,085 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 12:18:59,085 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 560
[2020-09-25 12:18:59,086 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 12:18:59,086 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-09-25 12:18:59,086 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 14
[2020-09-25 12:18:59,086 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 14
[2020-09-25 12:18:59,086 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 38
[2020-09-25 12:18:59,087 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 12:18:59,348 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 12:18:59,349 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 12:18:59,351 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:18:59,357 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 12:18:59,357 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-25 12:18:59,357 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 12:18:59,358 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 7
[2020-09-25 12:18:59,358 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 12:18:59,358 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-09-25 12:18:59,358 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 12:18:59,358 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 12:18:59,359 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 12:18:59,359 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 12:18:59,374 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 12:18:59,375 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917071777]
[2020-09-25 12:18:59,375 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 12:18:59,375 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16
[2020-09-25 12:18:59,376 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534759990]
[2020-09-25 12:18:59,377 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-09-25 12:18:59,377 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 12:18:59,378 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-09-25 12:18:59,378 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240
[2020-09-25 12:18:59,378 INFO  L87              Difference]: Start difference. First operand 107 states and 116 transitions. Second operand 16 states.
[2020-09-25 12:19:00,411 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 12:19:00,411 INFO  L93              Difference]: Finished difference Result 174 states and 186 transitions.
[2020-09-25 12:19:00,412 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. 
[2020-09-25 12:19:00,412 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states. Word has length 47
[2020-09-25 12:19:00,412 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 12:19:00,414 INFO  L225             Difference]: With dead ends: 174
[2020-09-25 12:19:00,414 INFO  L226             Difference]: Without dead ends: 168
[2020-09-25 12:19:00,417 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992
[2020-09-25 12:19:00,418 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 168 states.
[2020-09-25 12:19:00,433 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 111.
[2020-09-25 12:19:00,434 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 111 states.
[2020-09-25 12:19:00,435 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 120 transitions.
[2020-09-25 12:19:00,435 INFO  L78                 Accepts]: Start accepts. Automaton has 111 states and 120 transitions. Word has length 47
[2020-09-25 12:19:00,435 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-25 12:19:00,435 INFO  L479      AbstractCegarLoop]: Abstraction has 111 states and 120 transitions.
[2020-09-25 12:19:00,436 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-09-25 12:19:00,436 INFO  L276                IsEmpty]: Start isEmpty. Operand 111 states and 120 transitions.
[2020-09-25 12:19:00,437 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 48
[2020-09-25 12:19:00,437 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 12:19:00,438 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 12:19:00,438 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2020-09-25 12:19:00,438 INFO  L427      AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 12:19:00,438 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 12:19:00,438 INFO  L82        PathProgramCache]: Analyzing trace with hash -1893706375, now seen corresponding path program 1 times
[2020-09-25 12:19:00,439 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 12:19:00,439 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347908210]
[2020-09-25 12:19:00,439 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 12:19:00,459 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 12:19:00,475 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:19:00,997 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 12:19:00,997 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 54
[2020-09-25 12:19:00,998 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 12:19:00,998 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 537
[2020-09-25 12:19:00,998 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 12:19:00,998 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-09-25 12:19:00,998 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 14
[2020-09-25 12:19:00,999 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 14
[2020-09-25 12:19:00,999 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 38
[2020-09-25 12:19:00,999 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 12:19:01,356 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 12:19:01,357 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 12:19:01,359 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:19:01,364 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 12:19:01,364 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-25 12:19:01,365 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 12:19:01,365 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 6
[2020-09-25 12:19:01,365 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 12:19:01,365 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-09-25 12:19:01,366 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 12:19:01,366 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 12:19:01,366 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 12:19:01,366 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 12:19:01,378 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 12:19:01,378 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347908210]
[2020-09-25 12:19:01,379 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 12:19:01,379 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16
[2020-09-25 12:19:01,379 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141900254]
[2020-09-25 12:19:01,380 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-09-25 12:19:01,380 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 12:19:01,380 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-09-25 12:19:01,380 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240
[2020-09-25 12:19:01,381 INFO  L87              Difference]: Start difference. First operand 111 states and 120 transitions. Second operand 16 states.
[2020-09-25 12:19:02,536 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 12:19:02,537 INFO  L93              Difference]: Finished difference Result 186 states and 198 transitions.
[2020-09-25 12:19:02,537 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. 
[2020-09-25 12:19:02,537 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states. Word has length 47
[2020-09-25 12:19:02,538 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 12:19:02,539 INFO  L225             Difference]: With dead ends: 186
[2020-09-25 12:19:02,539 INFO  L226             Difference]: Without dead ends: 180
[2020-09-25 12:19:02,542 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992
[2020-09-25 12:19:02,542 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 180 states.
[2020-09-25 12:19:02,555 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 113.
[2020-09-25 12:19:02,557 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 113 states.
[2020-09-25 12:19:02,558 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 123 transitions.
[2020-09-25 12:19:02,558 INFO  L78                 Accepts]: Start accepts. Automaton has 113 states and 123 transitions. Word has length 47
[2020-09-25 12:19:02,559 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-25 12:19:02,559 INFO  L479      AbstractCegarLoop]: Abstraction has 113 states and 123 transitions.
[2020-09-25 12:19:02,559 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-09-25 12:19:02,559 INFO  L276                IsEmpty]: Start isEmpty. Operand 113 states and 123 transitions.
[2020-09-25 12:19:02,559 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 48
[2020-09-25 12:19:02,560 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 12:19:02,560 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 12:19:02,560 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2020-09-25 12:19:02,560 INFO  L427      AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 12:19:02,560 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 12:19:02,561 INFO  L82        PathProgramCache]: Analyzing trace with hash -857024599, now seen corresponding path program 1 times
[2020-09-25 12:19:02,561 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 12:19:02,562 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548800904]
[2020-09-25 12:19:02,562 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 12:19:02,580 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 12:19:02,593 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:19:02,732 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:19:03,787 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 12:19:03,787 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 54
[2020-09-25 12:19:03,788 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-25 12:19:03,788 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1206
[2020-09-25 12:19:03,788 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 12:19:03,789 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-09-25 12:19:03,789 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 14
[2020-09-25 12:19:03,789 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 14
[2020-09-25 12:19:03,790 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 38
[2020-09-25 12:19:03,790 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 12:19:04,166 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 12:19:04,168 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 12:19:04,170 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:19:04,175 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 12:19:04,176 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-25 12:19:04,176 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 12:19:04,176 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 7
[2020-09-25 12:19:04,177 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 12:19:04,177 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-09-25 12:19:04,178 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 12:19:04,178 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 12:19:04,178 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 12:19:04,178 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 12:19:04,193 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 12:19:04,200 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548800904]
[2020-09-25 12:19:04,201 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 12:19:04,201 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16
[2020-09-25 12:19:04,202 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716993387]
[2020-09-25 12:19:04,202 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-09-25 12:19:04,202 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 12:19:04,203 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-09-25 12:19:04,203 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240
[2020-09-25 12:19:04,204 INFO  L87              Difference]: Start difference. First operand 113 states and 123 transitions. Second operand 16 states.
[2020-09-25 12:19:05,419 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 12:19:05,419 INFO  L93              Difference]: Finished difference Result 195 states and 208 transitions.
[2020-09-25 12:19:05,420 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. 
[2020-09-25 12:19:05,420 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states. Word has length 47
[2020-09-25 12:19:05,420 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 12:19:05,421 INFO  L225             Difference]: With dead ends: 195
[2020-09-25 12:19:05,422 INFO  L226             Difference]: Without dead ends: 189
[2020-09-25 12:19:05,422 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992
[2020-09-25 12:19:05,423 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 189 states.
[2020-09-25 12:19:05,427 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 106.
[2020-09-25 12:19:05,427 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 106 states.
[2020-09-25 12:19:05,428 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 114 transitions.
[2020-09-25 12:19:05,428 INFO  L78                 Accepts]: Start accepts. Automaton has 106 states and 114 transitions. Word has length 47
[2020-09-25 12:19:05,429 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-25 12:19:05,429 INFO  L479      AbstractCegarLoop]: Abstraction has 106 states and 114 transitions.
[2020-09-25 12:19:05,429 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-09-25 12:19:05,429 INFO  L276                IsEmpty]: Start isEmpty. Operand 106 states and 114 transitions.
[2020-09-25 12:19:05,429 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 53
[2020-09-25 12:19:05,430 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 12:19:05,430 INFO  L422         BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 12:19:05,430 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8
[2020-09-25 12:19:05,430 INFO  L427      AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 12:19:05,430 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 12:19:05,431 INFO  L82        PathProgramCache]: Analyzing trace with hash 294895633, now seen corresponding path program 2 times
[2020-09-25 12:19:05,431 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 12:19:05,431 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853755473]
[2020-09-25 12:19:05,431 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 12:19:05,448 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 12:19:05,466 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:19:06,037 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:19:07,009 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 12:19:07,009 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 59
[2020-09-25 12:19:07,010 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-25 12:19:07,010 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1559
[2020-09-25 12:19:07,010 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 12:19:07,010 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-09-25 12:19:07,010 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 17
[2020-09-25 12:19:07,011 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 14
[2020-09-25 12:19:07,011 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 43
[2020-09-25 12:19:07,011 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 12:19:07,287 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 12:19:07,289 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 12:19:07,292 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:19:07,301 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 12:19:07,301 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-25 12:19:07,301 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 12:19:07,301 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 11
[2020-09-25 12:19:07,301 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 12:19:07,302 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-09-25 12:19:07,302 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 12:19:07,302 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 12:19:07,302 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 12:19:07,302 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 12:19:07,311 INFO  L134       CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 12:19:07,311 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853755473]
[2020-09-25 12:19:07,311 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 12:19:07,312 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18
[2020-09-25 12:19:07,312 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538751135]
[2020-09-25 12:19:07,312 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 18 states
[2020-09-25 12:19:07,313 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 12:19:07,313 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2020-09-25 12:19:07,313 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306
[2020-09-25 12:19:07,313 INFO  L87              Difference]: Start difference. First operand 106 states and 114 transitions. Second operand 18 states.
[2020-09-25 12:19:08,730 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 12:19:08,730 INFO  L93              Difference]: Finished difference Result 232 states and 249 transitions.
[2020-09-25 12:19:08,731 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. 
[2020-09-25 12:19:08,731 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states. Word has length 52
[2020-09-25 12:19:08,731 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 12:19:08,732 INFO  L225             Difference]: With dead ends: 232
[2020-09-25 12:19:08,733 INFO  L226             Difference]: Without dead ends: 208
[2020-09-25 12:19:08,734 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=406, Invalid=1486, Unknown=0, NotChecked=0, Total=1892
[2020-09-25 12:19:08,734 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 208 states.
[2020-09-25 12:19:08,740 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 127.
[2020-09-25 12:19:08,740 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 127 states.
[2020-09-25 12:19:08,741 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 137 transitions.
[2020-09-25 12:19:08,741 INFO  L78                 Accepts]: Start accepts. Automaton has 127 states and 137 transitions. Word has length 52
[2020-09-25 12:19:08,741 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-25 12:19:08,741 INFO  L479      AbstractCegarLoop]: Abstraction has 127 states and 137 transitions.
[2020-09-25 12:19:08,742 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 18 states.
[2020-09-25 12:19:08,742 INFO  L276                IsEmpty]: Start isEmpty. Operand 127 states and 137 transitions.
[2020-09-25 12:19:08,742 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 53
[2020-09-25 12:19:08,742 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 12:19:08,743 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 12:19:08,743 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9
[2020-09-25 12:19:08,743 INFO  L427      AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 12:19:08,743 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 12:19:08,743 INFO  L82        PathProgramCache]: Analyzing trace with hash 1689189507, now seen corresponding path program 1 times
[2020-09-25 12:19:08,744 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 12:19:08,744 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139723426]
[2020-09-25 12:19:08,744 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 12:19:08,760 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 12:19:08,775 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:19:09,355 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:19:10,062 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 12:19:10,062 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 59
[2020-09-25 12:19:10,063 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-25 12:19:10,063 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1301
[2020-09-25 12:19:10,063 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 12:19:10,064 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-09-25 12:19:10,064 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 17
[2020-09-25 12:19:10,064 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 14
[2020-09-25 12:19:10,065 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 43
[2020-09-25 12:19:10,065 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 12:19:10,408 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 12:19:10,409 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 12:19:10,411 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:19:10,416 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 12:19:10,417 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-25 12:19:10,417 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 12:19:10,418 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 6
[2020-09-25 12:19:10,418 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 12:19:10,418 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-09-25 12:19:10,419 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 12:19:10,419 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 12:19:10,419 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 12:19:10,420 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 12:19:10,437 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 12:19:10,438 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139723426]
[2020-09-25 12:19:10,438 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 12:19:10,438 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18
[2020-09-25 12:19:10,438 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744327690]
[2020-09-25 12:19:10,439 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 18 states
[2020-09-25 12:19:10,439 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 12:19:10,440 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2020-09-25 12:19:10,440 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306
[2020-09-25 12:19:10,441 INFO  L87              Difference]: Start difference. First operand 127 states and 137 transitions. Second operand 18 states.
[2020-09-25 12:19:11,785 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 12:19:11,786 INFO  L93              Difference]: Finished difference Result 247 states and 265 transitions.
[2020-09-25 12:19:11,786 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. 
[2020-09-25 12:19:11,786 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states. Word has length 52
[2020-09-25 12:19:11,787 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 12:19:11,789 INFO  L225             Difference]: With dead ends: 247
[2020-09-25 12:19:11,789 INFO  L226             Difference]: Without dead ends: 241
[2020-09-25 12:19:11,790 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=406, Invalid=1486, Unknown=0, NotChecked=0, Total=1892
[2020-09-25 12:19:11,791 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 241 states.
[2020-09-25 12:19:11,796 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 139.
[2020-09-25 12:19:11,796 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 139 states.
[2020-09-25 12:19:11,797 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 150 transitions.
[2020-09-25 12:19:11,797 INFO  L78                 Accepts]: Start accepts. Automaton has 139 states and 150 transitions. Word has length 52
[2020-09-25 12:19:11,798 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-25 12:19:11,798 INFO  L479      AbstractCegarLoop]: Abstraction has 139 states and 150 transitions.
[2020-09-25 12:19:11,798 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 18 states.
[2020-09-25 12:19:11,798 INFO  L276                IsEmpty]: Start isEmpty. Operand 139 states and 150 transitions.
[2020-09-25 12:19:11,799 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 54
[2020-09-25 12:19:11,799 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 12:19:11,799 INFO  L422         BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 12:19:11,799 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10
[2020-09-25 12:19:11,800 INFO  L427      AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 12:19:11,800 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 12:19:11,800 INFO  L82        PathProgramCache]: Analyzing trace with hash 219391251, now seen corresponding path program 1 times
[2020-09-25 12:19:11,800 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 12:19:11,800 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821455106]
[2020-09-25 12:19:11,801 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 12:19:11,814 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 12:19:11,828 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:19:12,258 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 12:19:12,259 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 60
[2020-09-25 12:19:12,259 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 12:19:12,259 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 443
[2020-09-25 12:19:12,260 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 12:19:12,260 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-09-25 12:19:12,260 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 14
[2020-09-25 12:19:12,260 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 14
[2020-09-25 12:19:12,260 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 35
[2020-09-25 12:19:12,261 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 12:19:12,530 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 12:19:12,531 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 12:19:12,533 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:19:12,538 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 12:19:12,538 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-25 12:19:12,538 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 12:19:12,538 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5
[2020-09-25 12:19:12,539 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 12:19:12,539 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-09-25 12:19:12,539 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 12:19:12,539 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 12:19:12,539 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 12:19:12,540 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 12:19:12,550 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 12:19:12,551 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821455106]
[2020-09-25 12:19:12,551 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 12:19:12,551 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16
[2020-09-25 12:19:12,552 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479323291]
[2020-09-25 12:19:12,552 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-09-25 12:19:12,552 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 12:19:12,553 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-09-25 12:19:12,553 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240
[2020-09-25 12:19:12,553 INFO  L87              Difference]: Start difference. First operand 139 states and 150 transitions. Second operand 16 states.
[2020-09-25 12:19:13,633 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 12:19:13,633 INFO  L93              Difference]: Finished difference Result 212 states and 227 transitions.
[2020-09-25 12:19:13,634 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. 
[2020-09-25 12:19:13,634 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states. Word has length 53
[2020-09-25 12:19:13,634 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 12:19:13,636 INFO  L225             Difference]: With dead ends: 212
[2020-09-25 12:19:13,636 INFO  L226             Difference]: Without dead ends: 197
[2020-09-25 12:19:13,638 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992
[2020-09-25 12:19:13,638 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 197 states.
[2020-09-25 12:19:13,644 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 145.
[2020-09-25 12:19:13,644 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 145 states.
[2020-09-25 12:19:13,645 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 156 transitions.
[2020-09-25 12:19:13,645 INFO  L78                 Accepts]: Start accepts. Automaton has 145 states and 156 transitions. Word has length 53
[2020-09-25 12:19:13,645 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-25 12:19:13,645 INFO  L479      AbstractCegarLoop]: Abstraction has 145 states and 156 transitions.
[2020-09-25 12:19:13,645 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-09-25 12:19:13,646 INFO  L276                IsEmpty]: Start isEmpty. Operand 145 states and 156 transitions.
[2020-09-25 12:19:13,646 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 54
[2020-09-25 12:19:13,646 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 12:19:13,647 INFO  L422         BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 12:19:13,647 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11
[2020-09-25 12:19:13,647 INFO  L427      AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 12:19:13,647 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 12:19:13,647 INFO  L82        PathProgramCache]: Analyzing trace with hash 1256073027, now seen corresponding path program 2 times
[2020-09-25 12:19:13,648 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 12:19:13,648 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668646444]
[2020-09-25 12:19:13,648 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 12:19:13,663 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 12:19:13,677 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:19:14,154 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 12:19:14,154 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 60
[2020-09-25 12:19:14,155 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 12:19:14,155 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 490
[2020-09-25 12:19:14,155 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 12:19:14,155 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-09-25 12:19:14,155 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 14
[2020-09-25 12:19:14,156 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 14
[2020-09-25 12:19:14,156 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 32
[2020-09-25 12:19:14,156 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 12:19:14,463 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 12:19:14,464 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 12:19:14,466 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:19:14,471 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 12:19:14,471 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-25 12:19:14,472 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 12:19:14,472 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 6
[2020-09-25 12:19:14,472 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 12:19:14,472 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-09-25 12:19:14,472 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 12:19:14,473 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 12:19:14,473 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 12:19:14,473 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 12:19:14,486 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 12:19:14,486 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668646444]
[2020-09-25 12:19:14,486 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 12:19:14,487 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16
[2020-09-25 12:19:14,487 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126031292]
[2020-09-25 12:19:14,487 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-09-25 12:19:14,487 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 12:19:14,488 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-09-25 12:19:14,488 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240
[2020-09-25 12:19:14,489 INFO  L87              Difference]: Start difference. First operand 145 states and 156 transitions. Second operand 16 states.
[2020-09-25 12:19:15,428 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 12:19:15,429 INFO  L93              Difference]: Finished difference Result 194 states and 208 transitions.
[2020-09-25 12:19:15,429 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. 
[2020-09-25 12:19:15,429 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states. Word has length 53
[2020-09-25 12:19:15,429 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 12:19:15,431 INFO  L225             Difference]: With dead ends: 194
[2020-09-25 12:19:15,431 INFO  L226             Difference]: Without dead ends: 164
[2020-09-25 12:19:15,432 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930
[2020-09-25 12:19:15,433 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 164 states.
[2020-09-25 12:19:15,437 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134.
[2020-09-25 12:19:15,437 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 134 states.
[2020-09-25 12:19:15,438 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 144 transitions.
[2020-09-25 12:19:15,438 INFO  L78                 Accepts]: Start accepts. Automaton has 134 states and 144 transitions. Word has length 53
[2020-09-25 12:19:15,439 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-25 12:19:15,439 INFO  L479      AbstractCegarLoop]: Abstraction has 134 states and 144 transitions.
[2020-09-25 12:19:15,439 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-09-25 12:19:15,439 INFO  L276                IsEmpty]: Start isEmpty. Operand 134 states and 144 transitions.
[2020-09-25 12:19:15,440 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 54
[2020-09-25 12:19:15,440 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 12:19:15,440 INFO  L422         BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 12:19:15,440 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12
[2020-09-25 12:19:15,440 INFO  L427      AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 12:19:15,441 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 12:19:15,441 INFO  L82        PathProgramCache]: Analyzing trace with hash 164878513, now seen corresponding path program 2 times
[2020-09-25 12:19:15,441 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 12:19:15,441 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165349045]
[2020-09-25 12:19:15,441 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 12:19:15,455 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 12:19:15,468 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:19:15,880 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 12:19:15,881 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 60
[2020-09-25 12:19:15,881 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 12:19:15,881 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 425
[2020-09-25 12:19:15,882 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 12:19:15,882 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-09-25 12:19:15,882 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 14
[2020-09-25 12:19:15,883 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 14
[2020-09-25 12:19:15,883 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 35
[2020-09-25 12:19:15,883 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 12:19:16,145 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 12:19:16,146 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 12:19:16,149 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:19:16,153 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 12:19:16,153 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-25 12:19:16,153 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 12:19:16,154 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 6
[2020-09-25 12:19:16,154 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 12:19:16,154 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-09-25 12:19:16,154 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 12:19:16,154 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 12:19:16,154 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 12:19:16,155 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 12:19:16,180 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 12:19:16,181 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165349045]
[2020-09-25 12:19:16,181 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 12:19:16,181 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16
[2020-09-25 12:19:16,181 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838628993]
[2020-09-25 12:19:16,182 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-09-25 12:19:16,182 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 12:19:16,182 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-09-25 12:19:16,182 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240
[2020-09-25 12:19:16,182 INFO  L87              Difference]: Start difference. First operand 134 states and 144 transitions. Second operand 16 states.
[2020-09-25 12:19:17,320 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 12:19:17,320 INFO  L93              Difference]: Finished difference Result 197 states and 210 transitions.
[2020-09-25 12:19:17,320 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. 
[2020-09-25 12:19:17,320 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states. Word has length 53
[2020-09-25 12:19:17,321 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 12:19:17,322 INFO  L225             Difference]: With dead ends: 197
[2020-09-25 12:19:17,322 INFO  L226             Difference]: Without dead ends: 176
[2020-09-25 12:19:17,323 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992
[2020-09-25 12:19:17,323 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 176 states.
[2020-09-25 12:19:17,328 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 127.
[2020-09-25 12:19:17,328 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 127 states.
[2020-09-25 12:19:17,329 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 136 transitions.
[2020-09-25 12:19:17,329 INFO  L78                 Accepts]: Start accepts. Automaton has 127 states and 136 transitions. Word has length 53
[2020-09-25 12:19:17,329 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-25 12:19:17,329 INFO  L479      AbstractCegarLoop]: Abstraction has 127 states and 136 transitions.
[2020-09-25 12:19:17,329 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-09-25 12:19:17,330 INFO  L276                IsEmpty]: Start isEmpty. Operand 127 states and 136 transitions.
[2020-09-25 12:19:17,330 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 54
[2020-09-25 12:19:17,330 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 12:19:17,330 INFO  L422         BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 12:19:17,331 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13
[2020-09-25 12:19:17,331 INFO  L427      AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 12:19:17,331 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 12:19:17,331 INFO  L82        PathProgramCache]: Analyzing trace with hash 492828385, now seen corresponding path program 1 times
[2020-09-25 12:19:17,331 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 12:19:17,332 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759869721]
[2020-09-25 12:19:17,332 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 12:19:17,344 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 12:19:17,358 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:19:17,447 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:19:18,530 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 12:19:18,530 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 60
[2020-09-25 12:19:18,530 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-25 12:19:18,530 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1184
[2020-09-25 12:19:18,530 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 12:19:18,530 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-09-25 12:19:18,531 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 14
[2020-09-25 12:19:18,531 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 14
[2020-09-25 12:19:18,531 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 35
[2020-09-25 12:19:18,531 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 12:19:18,817 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 12:19:18,819 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 12:19:18,821 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:19:18,826 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 12:19:18,826 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-25 12:19:18,827 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 12:19:18,827 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 6
[2020-09-25 12:19:18,827 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 12:19:18,827 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-09-25 12:19:18,827 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 12:19:18,828 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 12:19:18,828 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 12:19:18,828 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 12:19:18,854 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 12:19:18,854 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759869721]
[2020-09-25 12:19:18,854 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 12:19:18,855 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16
[2020-09-25 12:19:18,855 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015961983]
[2020-09-25 12:19:18,855 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-09-25 12:19:18,855 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 12:19:18,856 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-09-25 12:19:18,856 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240
[2020-09-25 12:19:18,856 INFO  L87              Difference]: Start difference. First operand 127 states and 136 transitions. Second operand 16 states.
[2020-09-25 12:19:20,036 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 12:19:20,037 INFO  L93              Difference]: Finished difference Result 191 states and 203 transitions.
[2020-09-25 12:19:20,037 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. 
[2020-09-25 12:19:20,038 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states. Word has length 53
[2020-09-25 12:19:20,038 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 12:19:20,039 INFO  L225             Difference]: With dead ends: 191
[2020-09-25 12:19:20,039 INFO  L226             Difference]: Without dead ends: 176
[2020-09-25 12:19:20,040 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992
[2020-09-25 12:19:20,040 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 176 states.
[2020-09-25 12:19:20,045 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 129.
[2020-09-25 12:19:20,045 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 129 states.
[2020-09-25 12:19:20,046 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 138 transitions.
[2020-09-25 12:19:20,046 INFO  L78                 Accepts]: Start accepts. Automaton has 129 states and 138 transitions. Word has length 53
[2020-09-25 12:19:20,046 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-25 12:19:20,047 INFO  L479      AbstractCegarLoop]: Abstraction has 129 states and 138 transitions.
[2020-09-25 12:19:20,047 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-09-25 12:19:20,047 INFO  L276                IsEmpty]: Start isEmpty. Operand 129 states and 138 transitions.
[2020-09-25 12:19:20,047 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 54
[2020-09-25 12:19:20,047 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 12:19:20,048 INFO  L422         BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 12:19:20,048 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14
[2020-09-25 12:19:20,048 INFO  L427      AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 12:19:20,048 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 12:19:20,048 INFO  L82        PathProgramCache]: Analyzing trace with hash 1529510161, now seen corresponding path program 2 times
[2020-09-25 12:19:20,049 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 12:19:20,049 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721016162]
[2020-09-25 12:19:20,049 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 12:19:20,062 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 12:19:20,075 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:19:20,158 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:19:21,140 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 12:19:21,141 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 60
[2020-09-25 12:19:21,141 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-25 12:19:21,141 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1077
[2020-09-25 12:19:21,141 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 12:19:21,141 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-09-25 12:19:21,141 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 14
[2020-09-25 12:19:21,141 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 14
[2020-09-25 12:19:21,142 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 32
[2020-09-25 12:19:21,142 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 12:19:21,432 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 12:19:21,433 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 12:19:21,435 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:19:21,440 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 12:19:21,440 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-25 12:19:21,441 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 12:19:21,441 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 6
[2020-09-25 12:19:21,441 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 12:19:21,442 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-09-25 12:19:21,442 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 12:19:21,442 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 12:19:21,443 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 12:19:21,443 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 12:19:21,456 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 12:19:21,457 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721016162]
[2020-09-25 12:19:21,457 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 12:19:21,457 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16
[2020-09-25 12:19:21,457 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185946674]
[2020-09-25 12:19:21,458 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-09-25 12:19:21,458 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 12:19:21,458 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-09-25 12:19:21,458 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240
[2020-09-25 12:19:21,459 INFO  L87              Difference]: Start difference. First operand 129 states and 138 transitions. Second operand 16 states.
[2020-09-25 12:19:22,525 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 12:19:22,526 INFO  L93              Difference]: Finished difference Result 173 states and 184 transitions.
[2020-09-25 12:19:22,526 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. 
[2020-09-25 12:19:22,526 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states. Word has length 53
[2020-09-25 12:19:22,527 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 12:19:22,528 INFO  L225             Difference]: With dead ends: 173
[2020-09-25 12:19:22,528 INFO  L226             Difference]: Without dead ends: 143
[2020-09-25 12:19:22,529 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930
[2020-09-25 12:19:22,530 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 143 states.
[2020-09-25 12:19:22,533 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 116.
[2020-09-25 12:19:22,534 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 116 states.
[2020-09-25 12:19:22,534 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 124 transitions.
[2020-09-25 12:19:22,535 INFO  L78                 Accepts]: Start accepts. Automaton has 116 states and 124 transitions. Word has length 53
[2020-09-25 12:19:22,535 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-25 12:19:22,535 INFO  L479      AbstractCegarLoop]: Abstraction has 116 states and 124 transitions.
[2020-09-25 12:19:22,535 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-09-25 12:19:22,535 INFO  L276                IsEmpty]: Start isEmpty. Operand 116 states and 124 transitions.
[2020-09-25 12:19:22,536 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 59
[2020-09-25 12:19:22,536 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 12:19:22,536 INFO  L422         BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 12:19:22,536 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15
[2020-09-25 12:19:22,536 INFO  L427      AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 12:19:22,537 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 12:19:22,537 INFO  L82        PathProgramCache]: Analyzing trace with hash 1732440393, now seen corresponding path program 2 times
[2020-09-25 12:19:22,537 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 12:19:22,537 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380536964]
[2020-09-25 12:19:22,537 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 12:19:22,553 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 12:19:22,567 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:19:22,812 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:19:24,209 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 12:19:24,210 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 65
[2020-09-25 12:19:24,210 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-25 12:19:24,210 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1655
[2020-09-25 12:19:24,210 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 12:19:24,210 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-09-25 12:19:24,210 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 15
[2020-09-25 12:19:24,210 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 14
[2020-09-25 12:19:24,210 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 40
[2020-09-25 12:19:24,210 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 12:19:24,530 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 12:19:24,532 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 12:19:24,534 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:19:24,540 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 12:19:24,540 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-25 12:19:24,541 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 12:19:24,541 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 7
[2020-09-25 12:19:24,541 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 12:19:24,542 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-09-25 12:19:24,542 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 12:19:24,542 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 12:19:24,543 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 12:19:24,543 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 12:19:24,561 INFO  L134       CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 12:19:24,561 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380536964]
[2020-09-25 12:19:24,562 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 12:19:24,562 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16
[2020-09-25 12:19:24,562 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367891181]
[2020-09-25 12:19:24,563 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-09-25 12:19:24,564 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 12:19:24,565 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-09-25 12:19:24,565 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240
[2020-09-25 12:19:24,566 INFO  L87              Difference]: Start difference. First operand 116 states and 124 transitions. Second operand 16 states.
[2020-09-25 12:19:25,540 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 12:19:25,541 INFO  L93              Difference]: Finished difference Result 194 states and 206 transitions.
[2020-09-25 12:19:25,541 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. 
[2020-09-25 12:19:25,541 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states. Word has length 58
[2020-09-25 12:19:25,542 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 12:19:25,543 INFO  L225             Difference]: With dead ends: 194
[2020-09-25 12:19:25,543 INFO  L226             Difference]: Without dead ends: 179
[2020-09-25 12:19:25,544 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=268, Invalid=788, Unknown=0, NotChecked=0, Total=1056
[2020-09-25 12:19:25,544 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 179 states.
[2020-09-25 12:19:25,553 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 134.
[2020-09-25 12:19:25,554 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 134 states.
[2020-09-25 12:19:25,554 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 143 transitions.
[2020-09-25 12:19:25,555 INFO  L78                 Accepts]: Start accepts. Automaton has 134 states and 143 transitions. Word has length 58
[2020-09-25 12:19:25,555 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-25 12:19:25,555 INFO  L479      AbstractCegarLoop]: Abstraction has 134 states and 143 transitions.
[2020-09-25 12:19:25,555 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-09-25 12:19:25,555 INFO  L276                IsEmpty]: Start isEmpty. Operand 134 states and 143 transitions.
[2020-09-25 12:19:25,556 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 59
[2020-09-25 12:19:25,556 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 12:19:25,556 INFO  L422         BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 12:19:25,556 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16
[2020-09-25 12:19:25,556 INFO  L427      AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 12:19:25,557 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 12:19:25,557 INFO  L82        PathProgramCache]: Analyzing trace with hash -1525845127, now seen corresponding path program 3 times
[2020-09-25 12:19:25,557 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 12:19:25,557 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949210369]
[2020-09-25 12:19:25,557 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 12:19:25,577 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 12:19:25,594 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:19:26,427 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 12:19:26,428 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 65
[2020-09-25 12:19:26,428 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 12:19:26,428 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 850
[2020-09-25 12:19:26,428 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 12:19:26,428 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-09-25 12:19:26,429 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 20
[2020-09-25 12:19:26,429 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 14
[2020-09-25 12:19:26,429 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 43
[2020-09-25 12:19:26,429 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 12:19:27,271 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 12:19:27,272 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 12:19:27,274 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 12:19:27,276 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 12:19:27,277 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-25 12:19:27,277 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 12:19:27,277 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-09-25 12:19:27,277 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 12:19:27,278 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-09-25 12:19:27,278 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 12:19:27,278 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 12:19:27,278 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 12:19:27,278 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 12:19:27,299 INFO  L134       CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 12:19:27,300 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949210369]
[2020-09-25 12:19:27,300 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 12:19:27,300 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22
[2020-09-25 12:19:27,300 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071598881]
[2020-09-25 12:19:27,301 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 22 states
[2020-09-25 12:19:27,301 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 12:19:27,301 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2020-09-25 12:19:27,301 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462
[2020-09-25 12:19:27,302 INFO  L87              Difference]: Start difference. First operand 134 states and 143 transitions. Second operand 22 states.
[2020-09-25 12:19:27,982 WARN  L193               SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56
[2020-09-25 12:19:28,714 WARN  L193               SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57
[2020-09-25 12:19:29,732 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 12:19:29,732 INFO  L93              Difference]: Finished difference Result 207 states and 220 transitions.
[2020-09-25 12:19:29,732 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. 
[2020-09-25 12:19:29,733 INFO  L78                 Accepts]: Start accepts. Automaton has 22 states. Word has length 58
[2020-09-25 12:19:29,733 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 12:19:29,734 INFO  L225             Difference]: With dead ends: 207
[2020-09-25 12:19:29,734 INFO  L226             Difference]: Without dead ends: 194
[2020-09-25 12:19:29,735 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=372, Invalid=2078, Unknown=0, NotChecked=0, Total=2450
[2020-09-25 12:19:29,736 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 194 states.
[2020-09-25 12:19:29,741 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 140.
[2020-09-25 12:19:29,741 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 140 states.
[2020-09-25 12:19:29,742 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 149 transitions.
[2020-09-25 12:19:29,742 INFO  L78                 Accepts]: Start accepts. Automaton has 140 states and 149 transitions. Word has length 58
[2020-09-25 12:19:29,743 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-25 12:19:29,743 INFO  L479      AbstractCegarLoop]: Abstraction has 140 states and 149 transitions.
[2020-09-25 12:19:29,743 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 22 states.
[2020-09-25 12:19:29,743 INFO  L276                IsEmpty]: Start isEmpty. Operand 140 states and 149 transitions.
[2020-09-25 12:19:29,744 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 59
[2020-09-25 12:19:29,744 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 12:19:29,744 INFO  L422         BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 12:19:29,744 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17
[2020-09-25 12:19:29,744 INFO  L427      AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 12:19:29,745 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 12:19:29,745 INFO  L82        PathProgramCache]: Analyzing trace with hash 1049071675, now seen corresponding path program 1 times
[2020-09-25 12:19:29,745 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 12:19:29,745 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870272954]
[2020-09-25 12:19:29,745 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 12:19:29,762 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-09-25 12:19:29,765 INFO  L174   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-09-25 12:19:29,765 INFO  L520         BasicCegarLoop]: Counterexample might be feasible
[2020-09-25 12:19:29,770 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18
[2020-09-25 12:19:29,792 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 12:19:29 BoogieIcfgContainer
[2020-09-25 12:19:29,792 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-09-25 12:19:29,794 INFO  L168              Benchmark]: Toolchain (without parser) took 43377.51 ms. Allocated memory was 140.5 MB in the beginning and 475.5 MB in the end (delta: 335.0 MB). Free memory was 102.8 MB in the beginning and 95.4 MB in the end (delta: 7.4 MB). Peak memory consumption was 342.4 MB. Max. memory is 7.1 GB.
[2020-09-25 12:19:29,795 INFO  L168              Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
[2020-09-25 12:19:29,796 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 731.40 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 102.1 MB in the beginning and 171.1 MB in the end (delta: -69.0 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB.
[2020-09-25 12:19:29,797 INFO  L168              Benchmark]: Boogie Preprocessor took 77.13 ms. Allocated memory is still 204.5 MB. Free memory was 171.1 MB in the beginning and 168.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB.
[2020-09-25 12:19:29,797 INFO  L168              Benchmark]: RCFGBuilder took 740.06 ms. Allocated memory is still 204.5 MB. Free memory was 168.5 MB in the beginning and 120.4 MB in the end (delta: 48.1 MB). Peak memory consumption was 48.1 MB. Max. memory is 7.1 GB.
[2020-09-25 12:19:29,798 INFO  L168              Benchmark]: TraceAbstraction took 41818.64 ms. Allocated memory was 204.5 MB in the beginning and 475.5 MB in the end (delta: 271.1 MB). Free memory was 119.8 MB in the beginning and 95.4 MB in the end (delta: 24.4 MB). Peak memory consumption was 295.4 MB. Max. memory is 7.1 GB.
[2020-09-25 12:19:29,801 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.23 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 731.40 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 102.1 MB in the beginning and 171.1 MB in the end (delta: -69.0 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 77.13 ms. Allocated memory is still 204.5 MB. Free memory was 171.1 MB in the beginning and 168.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 740.06 ms. Allocated memory is still 204.5 MB. Free memory was 168.5 MB in the beginning and 120.4 MB in the end (delta: 48.1 MB). Peak memory consumption was 48.1 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 41818.64 ms. Allocated memory was 204.5 MB in the beginning and 475.5 MB in the end (delta: 271.1 MB). Free memory was 119.8 MB in the beginning and 95.4 MB in the end (delta: 24.4 MB). Peak memory consumption was 295.4 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - CounterExampleResult [Line: 546]: a call of __VERIFIER_error() is reachable
    a call of __VERIFIER_error() is reachable
We found a FailurePath: 
[L521]              List a = (List) malloc(sizeof(struct node));
[L522]  COND FALSE  !(a == 0)
[L523]              List t;
[L524]              List p = a;
[L525]  COND TRUE   __VERIFIER_nondet_int()
[L526]              p->h = 1
[L527]              t = (List) malloc(sizeof(struct node))
[L528]  COND FALSE  !(t == 0)
[L529]              p->n = t
[L530]  EXPR        p->n
[L530]              p = p->n
[L525]  COND FALSE  !(__VERIFIER_nondet_int())
[L532]  COND TRUE   __VERIFIER_nondet_int()
[L533]              p->h = 2
[L534]              t = (List) malloc(sizeof(struct node))
[L535]  COND FALSE  !(t == 0)
[L536]              p->n = t
[L537]  EXPR        p->n
[L537]              p = p->n
[L532]  COND FALSE  !(__VERIFIER_nondet_int())
[L539]              p->h = 3
[L540]              p = a
[L541]  EXPR        p->h
[L541]  COND FALSE  !(p->h == 2)
[L543]  EXPR        p->h
[L543]  COND TRUE   p->h == 1
[L544]  EXPR        p->n
[L544]              p = p->n
[L543]  EXPR        p->h
[L543]  COND FALSE  !(p->h == 1)
[L545]  EXPR        p->h
[L545]  COND TRUE   p->h != 3
[L546]              __VERIFIER_error()

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 9 procedures, 91 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 41.7s, OverallIterations: 19, TraceHistogramMax: 3, AutomataDifference: 18.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1078 SDtfs, 4439 SDslu, 9073 SDs, 0 SdLazy, 7645 SolverSat, 646 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 543 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 485 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2386 ImplicationChecksByTransitivity, 13.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=145occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 18 MinimizatonAttempts, 1006 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 22.4s InterpolantComputationTime, 907 NumberOfCodeBlocks, 907 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 831 ConstructedInterpolants, 0 QuantifiedInterpolants, 415598 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 18 InterpolantComputations, 3 PerfectInterpolantSequences, 34/125 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be incorrect!
Received shutdown request...